PW170ESK-6 Shop Manual"
PW170ESK-6 Shop Manual"
PW170ESK-6 Shop Manual"
PW170ES-6K
STRUCTURE AND FUNCTION
10-1
STRUCTURE AND FUNCTION ENGINE RELATED PARTS
10-2
STRUCTURE AND FUNCTION RADIATOR • COOLER • AFTERCOOLER
10-3
STRUCTURE AND FUNCTION POWER TRAIN
10-4
STRUCTURE AND FUNCTION SWING CIRCLE
SWING CIRCLE
10-5
STRUCTURE AND FUNCTION SWING MACHINERY
SWING MACHINERY
SPECIFICATIONS
10-6
STRUCTURE AND FUNCTION SWING MACHINERY
1. Brake spring
2. Brake piston
3. Disc
4. Plate
10-7
STRUCTURE AND FUNCTION UNDERCARRIAGE
UNDERCARRIAGE
1. Undercarriage 6. Propshaft
2. Step 7. Travel motor
3. Wheel chock 8. Transmission
4. Front oscillating steering axle 9. Double wheel ass'y
5. Rear axle 10. Single wheel ass'y
10-8
STRUCTURE AND FUNCTION TRANSMISSION
10-9
STRUCTURE AND FUNCTION CLUTCH
10-10
10-9A
STRUCTURE AND FUNCTION CLUTCH
FUNCTION
The clutch is a device which automatically disen-
gages the drive between the 200 cc (rear) travel
motor and the transmission. This occurs when the
machine is accelerating and the disengagement oc-
curs at 11 Kph. The transmission system becomes
more efficient (by reducing losses caused by the
unnecessary rotation of the rear travel motor) pro-
viding better acceleration and enabling a maximum
speed of 30 Kph.
When the machine decelerates from a high speed
the clutch will re-engage automatically at 9 Kph and
will remain engaged until the speed is increased
above 11 Kph again.
10-9B
10-11
STRUCTURE AND FUNCTION AXLE
AXLE
OUTLINE
• Each axle consists of an axle housing support-
ing the chassis weight, a differential set in the
axle housing, a final drive, and a brake provided
at each and.
FRONT AXLE
10-10
10-12
STRUCTURE AND FUNCTION AXLE
REAR AXLE
10-11
10-13
STRUCTURE AND FUNCTION AXLE
FRONT AXLE
10-12
10-14
STRUCTURE AND FUNCTION AXLE
REAR AXLE
10-13
10-15
STRUCTURE AND FUNCTION SUSPENSION LOCK CYLINDER
1. Barrel Specifications
2. Plunger
Piston: ø100mm
Stroke: 155mm
Operating pressure: 40.0 MPa (408 Kg/cm2)
Pilot pressure: 3.0 MPa (30.6 Kg/cm 2)
Max 5.0 MPa (51.0 Kg/cm 2)
10-14
10-16
STRUCTURE AND FUNCTION SUSPENSION LOCK CYLINDER
CIRCUIT
Purpose Function
The undercarriage of wheeled hydraulic excavators The oscillating axle (3) is mounted in bearing (2) in
have one of the two driven axles oscillating the middle of the excavator. The two rams (1) which
mounted. This makes it possible to fully utilize the are full of hydraulic oil are connected through pipe-
excavator's rimpull in rough terrain - all of the wheels lines to the oscillation lock solenoid valve (4).
being constantly in contact with the ground. When the excavator is being moved, the oscillation
An oscillating blocking ram is fitted on each side of lock solenoid valve should be de-energized so that
the undercarriage to block the axle during digging or the hydraulic oil in the ram can be returned to tank
lifting work. as the axle is oscillating up and down. Before com-
Blocking the axle increases the excavator's stability. mencing excavating operations, the oscillation lock
solenoid valve should be energized to pressurize
1. Ram the oil in the rams. This will lock the axle in the posi-
2. Axle oscillating point tion it is in.
3. Oscillating axle
4. Oscillation lock solenoid valve
5. PPC pressure reducing valve
6. Hydraulic tank
7. Swivel joint
10-15
10-17
STRUCTURE AND FUNCTION BRAKING TRAIN
BRAKING TRAIN
10-16
STRUCTURE AND FUNCTION BRAKE PEDAL
BRAKE PEDAL
10-17
10-19
STRUCTURE AND FUNCTION BRAKE VALVE
BRAKE VALVE
10-18
10-20
STRUCTURE AND FUNCTION ACCUMULATOR FOR BRAKE SYSTEM
Specifications
10-19
10-21
STRUCTURE AND FUNCTION STEERING TRAIN
STEERING TRAIN
10-20
10-22
STRUCTURE AND FUNCTION STEERING TRAIN
ITEM
POSITIONS
3. PRIORITY VALVE
CONTROL SPRING PRESSURE ...................................................................................................... 7 bar
NORMAL
1= CYL.VOL = 748 cm3 = 3.8 TURNS
PUMP.VOL 195 cm3
EMERGENCY
1= CYL.VOL = 748 cm3 = 10.7 TURNS
PUMP.VOL 70 cm 3
10-21
10-23
STRUCTURE AND FUNCTION STEERING COLUMN
STEERING COLUMN
1. Steering wheel
2. Steering column
3. Gaiter
4. Pedal
5. Hose
6. Orbitroll valve
7. Mounting bracket
10-22
10-24
STRUCTURE AND FUNCTION HYDRAULIC CIRCUIT DIAGRAM
10-23
STRUCTURE AND FUNCTION HYDRAULIC CIRCUIT DIAGRAM
10-23A
STRUCTURE AND FUNCTION HYDRAULIC TANK
HYDRAULIC TANK
10-24
10-27
STRUCTURE AND FUNCTION HYDRAULIC PUMP
HYDRAULIC PUMP
10-25
10-28
STRUCTURE AND FUNCTION HYDRAULIC PUMP
OPERATION
1. Operation of pump
1) cylinder block (7) rotates together with
shaft (1), and shoe (5) slides on flat surface
A.
When this happens, rocker cam (4) moves
along cylindrical surface B, so angle α be-
tween center line X of rocker cam (4) and
the axial direction of cylinder block (7)
changes. (Angle α is called the swash plate
angle.)
10-26
10-29
STRUCTURE AND FUNCTION HYDRAULIC PUMP
• If swash plate angle α becomes larger, the dif- • Piston (14) moves in a reciprocal movement
ference in volumes E and F becomes larger and (씯씮) according to the command from the
discharge volume Q increases. TVC•LS valve and the spring force.
• Swash plate angle α is changed by positioning • Main pump discharge pressure (self-pressure)
piston (12) and return piston (14). PP is always connected to the chamber receiv-
• Servo piston (12) moves in a reciprocal move- ing the pressure on piston (12) end. (the self-
ment (씯씮) according to the spring force and pressure is brought in).
pump output pressure. • Output pressure PEN of the LS valve is brought
• This straight line movement is transmitted to the chamber receiving the pressure at piston
through rod (13) and (15) to rocker cam (4), and (14) end.
rocker cam (4), which is supported by the cylin- • The relationship between piston (12) and piston
drical surface to cradle (2), moves in a swinging (14) controls swash plate (4) angle.
movement on the cylindrical surface in (direc-
tion).
10-27
10-30
STRUCTURE AND FUNCTION HYDRAULIC PUMP
10-28
10-31
STRUCTURE AND FUNCTION HYDRAULIC PUMP
10-29
10-32
STRUCTURE AND FUNCTION HYDRAULIC PUMP
2. TVC. LS valve
10-30
10-33
STRUCTURE AND FUNCTION HYDRAULIC PUMP
FUNCTION
1. LS VALVE
• The LS valve detects the load and controls the
discharge amount.
This valve controls main pump discharge
amount Q according to differential pressure
왕PLS (=PP - PLS) (the difference between
main pump pressure PP and control valve out-
let port pressure PLS) (called the LS differential
pressure).
• Main pump pressure PP, pressure PLS (called 2.55 (26)
the LS pressure) coming from the control valve
output, and pressure PSIG (called the LS se-
lection pressure) from the proportional solenoid
vlve enter this valve. The reletionship between
discharge amount Q and differential pressure
왕PLS, (the difference between main pump
pressure PP and LS pressure PLS) (=PP -
PLS) changes as shown in the diagram on the
right according to LS selector pressure PSIG.
• When PSIG changes between 0 and 2.94 MPa
(0 and 30 kg/ cm2), the spool load changes ac-
cording to this, and the selector point for the
pump discharge amount changes at the rated
central value between 0.64 and 2.55 MPa (6.5
and 26 kg/cm2).
2. TVC VALVE
• When the pump discharge pressure PP
(selfpressure) is high, the TVC valve controls
the pump so that no more oil than the constant
flow (in accordance with the discharge pres-
sure) flows even if the stroke of the control valve
becomes larger. In this way it carries out equal
horsepower control so that the horsepower ab-
sorbed by the pump does not exceed the en-
gine horsepower.
• In other words, if the load during the operation
becomes larger and the pump discharge pres-
sure rises, it reduces the discharge amount
from the pump; and if the pump discharge pres-
sure drops, it increases the discharge amount
from the pump. The relation between the pump
discharge pressure PP and pump discharge
amount Q is shown on the right, with the current
given to the TVC valve solenoid shown as a pa-
rameter. However, in the heavy-duty operation
mode, there are cases where it is given the
function of sensing the actual speed of the en-
gine, and if the speed drops because of an in-
crease in the load, it reduces the pump dis-
charge amount to allow the speed to recover. In to the TVC valve solenoid from the controller in-
other words, when the load increases and the creases according to the drop in the engine
engine drops below the set value, the command speed to reduce the pump swash plate angle.
10-31
10-34
STRUCTURE AND FUNCTION HYDRAULIC PUMP
OPERATION
Minimum direction
10-31A
10-35
STRUCTURE AND FUNCTION HYDRAULIC PUMP
Maximum direction
10-31B
10-36
STRUCTURE AND FUNCTION HYDRAULIC PUMP
10-31C
10-37
STRUCTURE AND FUNCTION HYDRAULIC PUMP
• Let us take the area receiving the pressure at • At this point, the relationship between the area
the large piston diameter end as A1, the area receiving the pressure at both ends of piston (1)
receiving the pressure at the small diameter is A0:A1 = 1:2, so the pressure applied to both
end as A0, and the pressure flowing into the ends of the piston when it is balanced becomes
large piston diameter end as Pen. If the main Pp: Pen = 2:1.
pump pressure Pp of the LS valve and the com- • The position where spool (4) is balanced and
bined force of force F of spring (3) and LS pres- stopped is the standard center, and the force of
sure PLs are balanced, and the relationship is spring (3) is adjusted so that it is determined
A0 x Pp = A1 x Pen, servo piston (1) will stop in when Pp - PLs = 2.11 MPa (21.5 kg/cm 2). How-
that position, and the swash plate will be kept at ever, if Psig (the output pressure of 0 - 2.94
an intermediate position. (It will stop at a posi- MPa (0 - 30 kg/cm2) of the EPC valve of the LS
tion where the opening from port b to port c and valve) is applied to port e, the balance stop po-
from port d to port c of spool (4) is approxi- sition will change in proportion to pressure Psig
mately the same.) between Pp - Pls = 2.11 씯씮 0.637 MPa (21.5
씯씮 6.5 kg/cm2).
10-31D
10-38
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
2. TVC valve
1) When pump controller is normal
a. When the load on the actuator is small and • The size of command current X is determined
pump pressure Pp is low by the nature of the operation (lever operation),
(1) Movement of solenoid (1) the selection of the working mode, and the set
• The command current from the pump controller value and actual value for the engine speed.
flows to solenoid (1). This command current
changes the internal force pushing solenoid
push pin (11).
• On the opposite site to the force pushing this
solenoid push pin (11) is the spring set pres-
sure of springs (3) and (4) and pump pressure
Pp. Piston (2) stops at a position where the
combined force pushing piston (2) is balanced,
and the pressure (pressure of port c) output
from the TVC valve changes according to this
piston.
10-31E
10-39
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
10-31F
10-40
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
Minimum direction
b. When load on actuator is small and pump • If main pressure Pp increases further and pis-
discharge pressure is high ton (2) moves further to the left, main pump
• When the load is large and pump discharge pressure Pp flows to port c and acts to make
pressure Pp is high, the force pushing piston the discharge amount the minimum. When pis-
(2) to the left becomes larger and piston (2) ton (9) moves to the left, piston (5) is moved to
moves to the position shown in the diagram the right by cam (7) and lever (6). For this rea-
above. When this happens, as shown in the dia- son, springs 3 and 4 are compressed and push
gram above, part of the pressurized oil from back piston (2). Because of this force, piston (2)
port b flows out to port d and the pressure oil cuts off the connection from port b to port c,
flowing from port c to the LS valve becomes ap- and and port c and port d are connected. As a
proximately half of main pump pressure Pp. result, the pressure at port c (=f) drops, and pis-
• When port h and port e of the LS valve are con- ton (9) stops moving to the left. The position in
nected (see 1. LS valve), the pressure from port which piston (9) stops when this happens is fur-
f enters the large piston diameter end of servo ther to the left than the position when pump
piston (9), and servo piston (9) stops. pressure Pp is low.
10-31G
10-41
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
10-31H
10-42
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
2) When pump controller is abnormal and TVC • If main pump pressure Pp is low, the combined
prolix swiych is "ON" force of the pump pressure and the force of so-
a. When load on main pump is light lenoid (1) is weaker than the spring set force, so
• If there is a failure in the pump controller, turn piston (2) is balanced at a position to the rigft.
TVC prolix switch "ON" to switch to the resistor • At this point, port c is connected to the drain
side. In this case, the power source is taken di- pressure of port d, and the large piston diam-
rectly from the battery. But if the current is used eter end of servo piston (9) also becomes the
as it is, it is too large, so use the resistor to con- drain pressure Pt through the LS valve. When
trol the current flowing to solenoid (1). this happens, the pressure at the small piston
• When this is done, the current becomes con- diameter end is large, so servo piston (9)
stant, so the force pushing solenoid push pin moves in the direction to make the discharge
(11) is also constant. amount larger.
10-31I
10-43
STRUCTURE AND FUNCTION CIRCUIT DIAGRAM
(Minimum direction)
10-31J
10-44
STRUCTURE AND FUNCTION PPC PUMPLESS SYSTEM
1. Gear Pump.
2. Steering/Braking Priority Valve.
3. Power Brake Valve.
4. Pressure Reducing Valve.
FUNCTION
• The PPC Pumpless system discharges pressu-
rized oil to operate the PPC circuit and solenoid
valve assemblies.
10-31K
10-45
STRUCTURE AND FUNCTION PPC PUMPLESS SYSTEM
OPERATION
• The PPC pumpless system utilises the return
line oil from the power brake valve. Oil is sup-
plied to the steering/braking circuits from a
gear pump driven by the engine. Oil flow is
prioritised to the steering circuit via a priority
valve with the remaining oil flow feeding the
power brake valve.
• The return line from the brake valve passes
through a pressure reducing valve where the oil
pressure is maintained at 35-0/3 bar. This pres-
sure is utilised to charge the PPC circuit.
10-31L
10-46
STRUCTURE AND FUNCTION CONTROL VALVE
CONTROL VALVE
Outline
The following control valve is standard: Pf. Port P6 (from travel REVERSE PPC valve)
• 8-spool valve (includes 2 service valves) Pg. Port P7 (from boom lift cylinder RAISE PPC
valve)
The cross sections shown are for the 6-spool valve Ph. Port P8 (from boom lift cylinder LOWER PPC
(sub assembly) valve)
✶ The cross-sectional structure of the service Pi. Port P9 (from arm OUT PPC valve)
valve is the same as the structure for the bucket Pj. Port P10 (from arm IN PPC valve)
valve, so refer to the bucket valve for details. Pk. Port P11 (from bucket DUMP PPC valve)
Pl. Port P12 (from bucket CURL PPC valve)
General locations and names of ports (common Pm. Port P-1 (from boom adjust EXTEND PPC
for each external view diagram) valve)
1. 6-spool valve sub assembly Pn. Port P-2 (from boom adjust RETRACT PPC
2. Cover A (main relief valve) valve)
3. Cover B (unload valve) Po. Port P-3 (from service PPC valve)
4. Arm counterbalance valve Pp. Port P-4 (from service PPC valve)
5. No. 1 service valve
6. No. 2 service valve
10-32
10-47
STRUCTURE AND FUNCTION CONTROL VALVE
EXTERNAL VIEW
10-33
10-48
STRUCTURE AND FUNCTION CONTROL VALVE
Cross-sectional drawing
✶ The cross section is given only for the 6-spool valve (STANDARD). The cross-sectional structure of the
service valves in an 8-spool valve is the same as the structure of the bucket valve, so refer to the bucket
valve for details.
1. Pressure compensation valve (swing left) 7. Pressure compensation valve (bucket CURL)
2. Pressure compensation valve 8. Pressure compensation valve (arm IN)
(stabilizer EXTEND) 9. Pressure compensation valve (boom LOWER)
3. Pressure compensation valve 10. Pressure compensation valve
(travel FORWARD) (travel REVERSE)
4. Pressure compensation valve (boom RAISE) 11. Pressure compensation valve
5. Pressure compensation valve (arm OUT) (stabilizer RETRACT)
6. Pressure compensation valve (bucket DUMP) 12. Pressure compensation valve (swing RIGHT)
10-34
10-49
STRUCTURE AND FUNCTION CONTROL VALVE
10-34A
10-50
STRUCTURE AND FUNCTION CONTROL VALVE
10-34B
10-51
STRUCTURE AND FUNCTION CONTROL VALVE
10-35
10-52
STRUCTURE AND FUNCTION CONTROL VALVE
10-36
10-53
STRUCTURE AND FUNCTION CONTROL VALVE
10-36A
10-54
STRUCTURE AND FUNCTION CONTROL VALVE
10-36B
10-55
STRUCTURE AND FUNCTION CONTROL VALVE
1. Suction valve
2. Main valve
3. Piston
4. Piston spring
5. Poppet
6. Poppet spring
7. Suction valve
8. Sleeve
9. Adjustment screw
10. Locknut
SPECIFICATIONS
10-37
10-56
STRUCTURE AND FUNCTION CLSS
CLSS
OUTLINE OF CLSS
Features Structure
• CLSS stands for Closed center Load Sensing • The CLSS consists of a main pump control
System, and has the following features. valve, and actuators for the work equipment.
• The main pump body consists of the pump it-
1) Fine control not influenced by load. self, the TVC valve and the LS valve.
2) Control enabling digging even with fine control.
3) Ease of compound operation ensured by flow
divider function using area of opening of spool
during compound operations. Energy saving
using variable pump control.
10-38
10-57
STRUCTURE AND FUNCTION CLSS
BASIC PRINCIPLE
1) Control of pump swash plate angle
• The pump swash plate angle (pump discharge amount) is controlled so that LS differential pressure 왕PLS
is constant. LS differential pressure 왕PLS, which is the differential pressure between pump discharge
pressure PP and LS pressure PLS (actuator load pressure) at the outlet port of the control valve (LS
differential pressure 왕PLS = Pump discharge pressure PP - LS pressure PLS).
• If LS differential pressure 왕PLS becomes lower than the set differential pressure of the LS valve, the pump
swash plate angle becomes greater, and if it becomes higher, the pump swash plate angle becomes
smaller.
10-39
10-58
STRUCTURE AND FUNCTION CLSS
10-40
10-59
STRUCTURE AND FUNCTION CLSS
10-41
10-60
STRUCTURE AND FUNCTION CLSS
1. Unload valve
(LS pressure + 3.92 MPa (40 kg/cm2))
2. Safety-suction valve
(33.77 MPa (365 kg/cm2) - Arm,
Bucket, Second Boom)
(33.32 MPa (340 kg/cm2) - Boom)
3. Pressure compensation valve
4. LS shuttle valve
5. Suction valve
6. Main relief valve
(normal: 31.85 MPa (325 kg/cm2),
When pressure rises:
34.79 MPa (355 kg/cm2))
7. Lift check valve
8. Bypass check valve
9. LS select valve
10-42
10-61
STRUCTURE AND FUNCTION CLSS
1) Unload valve
Function
1. When the control valve is at neutral, pump discharge amount Q discharged by the minimum swash plate
angle is eleased to the tank circuit. When this happens, pump discharge pressure Pp is set at 3.92 MPa (40
kg/cm2) by spring (3) inside the valve. (LS pressure PLS: 0 MPa (0 kg/cm2).
Operation
10-43
10-62
STRUCTURE AND FUNCTION CLSS
2. During fine control of the control valve, when the demand flow for the actuator is within the amount dis-
charged by the minimum swash plate angle of the pump, pump discharge pressure Pp is set to LS pressure
Pls + 3.92 MPa (40 kg/cm2). When the differential pressure between pump discharge pressure Pp and LS
pressure Pls reaches the load of spring (3) 3.92 MPa (40 kg/cm2), the unload valve opens, so LS differential
pressure 왕Pls becomes 3.92 MPa (40 kg/cm2).
Operation
10-44
10-63
STRUCTURE AND FUNCTION CLSS
3. When the control valve is being operated and the demand flow for the actuator becomes greater than the
pump discharge from the minimum swash plate angle, the flow of the oil out to tank circuit T is cut off, and
all of pump discharge Q flows to the actuator circuit.
Operation
10-45
10-64
STRUCTURE AND FUNCTION CLSS
2) Introduction of LS pressure
★ The diagram shows the condition for arm IN.
Operation
• When spool (2) is operated, the pump pressure
passes through introduction hole a, enters port
and is taken to the LS circuit. When the pump
pressure rises and reaches the load pressure
of port B, ball valve (5) opens.
10-46
10-65
STRUCTURE AND FUNCTION CLSS
3) LS bypass plug
Outline
1. This releases the residual pressure of LS pressure Pls.
2. This make the speed of the rise in pressure of LS pressure Pls more gentle. In addition, with this discarded
throttled flow, it creates a pressure loss in the throttled amount of the spool or shuttle valve, and increases
the stability by lowering the effective LS differential pressure.
Operation
• The pressurized oil for LS circuit Pls passes 1. LS bypass plug
from clearance filter a (formed by the clearance
between LS bypass plug (1) and the valve Pls: LS circuit (pressure)
body) through through orifice b and flows to the T: Tank circuit (pressure)
tank circuit.
10-47
10-66
STRUCTURE AND FUNCTION CLSS
10-48
10-67
STRUCTURE AND FUNCTION CLSS
10-49
10-68
STRUCTURE AND FUNCTION CLSS
10-50
10-69
STRUCTURE AND FUNCTION CLSS
<For travel>
• No holding pressure is generated at port A in
the travel circuit, so a pressure compensation
valve without a shuttle valve is used.
10-51
10-70
STRUCTURE AND FUNCTION CLSS
Function
• The pressure compensation valve determines the compensation characteristics by carrying out fine adjust-
ment of the area ratio (A2/A1) between area A2 of piston (3) and area A1 of valve (4) to match the charac-
teristics of each actuator.
10-52
10-71
STRUCTURE AND FUNCTION CLSS
10-53
10-72
STRUCTURE AND FUNCTION CLSS
10-54
10-73
STRUCTURE AND FUNCTION CLSS
10-55
10-74
STRUCTURE AND FUNCTION CLSS
Operation
• The cylinder bottom pressure enters port F and
pushes piston (6) to the left. Spool (7) moves
fully to the left and interconnects port C of re-
generation circuit (11) and tank drain circuit
(10). As a result, the pressure loss in the drain
circuit is reduced.
10-56
10-75
STRUCTURE AND FUNCTION CLSS
1. Piston Operation
2. Spool • During arm IN operations, if the actuating pres-
3. Spring sure at the arm cylinder bottom rises, the pres-
4. Check valve sure at port A also rises. When the force re-
5. Regeneration circuit ceived by piston (1) from the pressure at port A
6. Tank drain circuit becomes greater than the force of spring (3),
piston (1) moves to the left.
• Spool (2) is pushed by piston (1) and also
moves to the left, so ports B and C are intercon-
nected. When this happens, the pressurized oil
from the cylinder head passes through ports B
and C, and flows directly to drain circuit (6).
(The pressure loss is removed when draining.)
• When this happens, check valve (4) is closed by
the pressure at port A, so it shuts off regenera-
tion circuit (5), and prevents the oil from flowing
back from the cylinder bottom to the head end.
10-57
10-76
STRUCTURE AND FUNCTION CLSS
Function
• When the swing + boom RAISE, or swing + travel are operated together, this valva prevents the high
pressure which is generated when driving the swing, and prevents swing LS pressure a from flowing into LS
circuit Pls.
10-58
10-77
STRUCTURE AND FUNCTION CLSS
10-59
10-78
STRUCTURE AND FUNCTION CLSS
Function
• This function uses the TVC valve, pump controller, and pump pressure sensor, and if pump discharge
pressure Pp exceeds the set pressure, it makes pump discharge amount Q the minimum.
A: Cut off
B: Cut off cancel
10-60
10-79
STRUCTURE AND FUNCTION CLSS
1. Valve Function
2. Spring • It is possible to adjust the division of the oil flow
3. Sleeve to the service valve when the service valve (for
4. Poppet attachment) is operated together with the main
5. Spring control valve (boom RAISE, etc.). (Variable in
6. Screw proportion to surface area).
7. Locknut • The pump pressure leaving the service valve
8. Plastic cap spool acts on the left end of valve (1), and at the
same time passes through throttle a and enters
chamber g.
The maximum LS pressure passes through
throttle d and enters chamber e. At the same
time, the cylinder port pressure passes through
passage c and throttle f, and goes to chamber
h.
In addition, the force of spring (2) acts on valve
(1), and the force spring (5) acts on poppet (4).
The force of spring (5) can be adjusted with
screw (6).
10-61
10-80
STRUCTURE AND FUNCTION CLSS
Operation
10-62
10-81
STRUCTURE AND FUNCTION CLSS
10- 63
10-82
STRUCTURE AND FUNCTION CLSS
10-64
STRUCTURE AND FUNCTION CLSS
10-65
10-84
STRUCTURE AND FUNCTION CLSS
10-66
STRUCTURE AND FUNCTION CLSS
10-67
10-86
STRUCTURE AND FUNCTION CLSS
10-68
STRUCTURE AND FUNCTION
10-69
10-88
STRUCTURE AND FUNCTION CLSS
10-70
STRUCTURE AND FUNCTION CLSS
10-71
10-90
STRUCTURE AND FUNCTION CLSS
10-72
STRUCTURE AND FUNCTION SWING MOTOR
SWING MOTOR
10-73
STRUCTURE AND FUNCTION SWING MOTOR
SUCTION-SAFETY VALVE
Function
• When the swing is stopped, the outlet port cir-
cuit of the motor is closed by the control valve,
but the motor continues to be turned by the iner-
tia of the swing. As a result, the pressure at the
outlet port of the motor becomes abnormally
high and there is danger that the motor will be
damaged.
• The safety valve is installed to prevent this
problem. It acts to release the abnormally high
pressure oil from the outlet port of the motor to
port G and also functions as a swing brake.
• The suction valve supplies an amount of oil
equivalent to the amount of oil released by the
safety valve. It sends this oil from port G to the
inlet port of the motor to prevent any cavitation.
Operation
1. When starting swing
• If the swing control lever is operated to swing to
the right, the pressurized oil from the pump
passes through the control valve and it supplies
to port MA.
• When this happens, the pressure at port MA
rises and the starting force is generated in the
motor, so the motor starts to turn.
The oil from the outlet port of the motor flows
from port MB through the control valve and re-
turns to the tank.
2. When stopping swing
• When the swing control lever is returned to the
neutral position, no more pressurized oil is sup-
plied from the pump to port MA.
At the same time, the oil from the outlet port of
the motor returns from the control valve to the
tank, and the circuit is closed.
• The pressure at port MB rises, and rotating re-
sistance to the motor is generated, so the brake
starts to take effect.
If the pressure at port MB rises to the set pres-
sure of safety valve (1), safety valve (1) opens
and releases the pressurized oil at port MB to
port G.
• No pressurized oil is supplied at port MA, but
the swing continues, so negative force is gener-
ated.
When this negative pressure to the set pres-
sure of suction valve (2), suction valve (2)
opens and oil is supplied fromport G to prevent
cavitation.
10-73A
10-42
10-74
STRUCTURE AND FUNCTION SWING MOTOR
1. Barrel housing
2. Valve plate
3. Cylinder barrel
5. Timing gear
6. Roller bearings
7. Bearing housing
8. Shaft seal
9. Output/input shaft
10-74
10-43
10-75
STRUCTURE AND FUNCTION CENTER SWIVEL JOINT
1. Cover
2. Housing
3. Sealing ring
4. Lip seal
5. Rotor
10-75
10-76
STRUCTURE AND FUNCTION FRONT TRAVEL MOTOR
10-76
10-77
STRUCTURE AND FUNCTION REAR TRAVEL MOTOR
SPECIFICATON
10-77
10-78
STRUCTURE AND FUNCTION WORK EQUIPMENT • SWING PPC VALVE
10-78
10-79
STRUCTURE AND FUNCTION WORK EQUIPMENT • SWING PPC VALVE
1. Spool 7. Joint
2. Metering spring 8. Plate
3. Centering spring 9. Retainer
4. Piston 10. Body
5. Disc 11. Filter
6. Nut (for connecting lever)
10-79
10-80
STRUCTURE AND FUNCTION WORK EQUIPMENT • SWING PPC VALVE
OPERATION
1. At neutral
Ports A and B of the control valve and ports P1
and P2 of the PPC valve are connected to drain
chamber D through fine control hole "f" in spool
(1). (Fig 1)
10-80
10-81
STRUCTURE AND FUNCTION WORK EQUIPMENT • SWING PPC VALVE
4. At full stroke
When disc (5) pushes down piston (4), and re-
tainer (9) pushes down spool (1), fine control
hole "f" is shut off from drain chamber D, and is
connected with pump pressure chamber Pp.
Therefore, the pilot pressure oil from the control
pump passes through fine control hole "f" and
flows to chamber A from port P1, and pushes
the control valve spool.
The oil returning from chamber B passes from
port P2 through fine control hole "f" and flows to
drain chamber D. (Fig. 4)
10-81
10-82
STRUCTURE AND FUNCTION TRAVEL PPC PEDAL
SPECIFICATIONS
10-82
10-83
STRUCTURE AND FUNCTION SERVICE PPC VALVE
1. Pin
2. Cam
3. Ball
4. Piston
5. Cover
6. Sleeve
7. Centering spring
8. Metering spring
9. Spool
10. Body
10-83
10-84
STRUCTURE AND FUNCTION SERVICE PPC VALVE
OPERATION
At neutral
• The pressurized oil from the control pump en-
ters from port P and is blocked by spool (9).
• Port A and B of the control valve and port "a"
and "b" of the PPC valve are connected to drain
port T through fine control hole X of spool (9).
When operated
• When cam (2) is moved, metering spring (8) is
pushed by ball (3), piston (4) and sleeve (6),
and spool (9) is also pushed down by this.
• As a result, fine control hole X is shut off from
the drain circuit. At almost the same time, fine
control portion Y is connected with port "a", and
the pressurized oil from port P flows from port
"a" to port A of the control valve.
10-84
10-85
STRUCTURE AND FUNCTION SERVICE PPC VALVE
10-85
10-86
STRUCTURE AND FUNCTION SAFETY LOCK VALVE PPC ACCUMULATOR
PPC ACCUMULATOR
1. Gas plug
2. Shell
3. Poppet
4. Holder
5. Bladder
6. Oil port
SPECIFICATIONS
Gas capacity: 400 cc
10-86
10-87
STRUCTURE AND FUNCTION PPC SHUTTLE VALVE
Function
This sends the PPC valve output pressure to the
control valve. It is provided with a mount port for the
pressure switch for detecting the pilot pressure.
10-87
10-88
STRUCTURE AND FUNCTION PPC SHUTTLE VALVE
10-88
10-89
STRUCTURE AND FUNCTION PPC SHUTTLE VALVE
10-89
10-90
STRUCTURE AND FUNCTION
10-90
10-91
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
10-91
10-92
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
10-92
10-93
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
Function
• The EPC valve consists of the proportional so-
lenoid portion and the hydraulic valve portion.
• When it receivers signal current i from the pump
controller, it generates EPC output pressure P
in proportion to the size of the signal, and out-
puts it to the control valve.
Operation
1. When signal current is 0 (coil deactivated)
• There is no signal current flowing from the con-
troller to coil (5), coil (5) is deactivated.
• For this reason, spool (2) is pushed to the right
in the direction of the arrow by spring (3).
• As a result, port P closes and the pressurized
oil from the control pump does not flow to the
LS valve.
At the same time, the pressurized oil from the
LS valve passes from port C through port T and
is drained to the tank.
10-93
10-94
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
10-94
10-95
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
10-95
10-96
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
Function
• The EPC valve consists of the proportional so-
lenoid portion and the hydraulic valve portion.
• When it receivers signal current i from the
pump controller, it generates EPC output pres-
sure P in proportion to the size of the signal,
and outputs it to the control valve.
Operation
1. When signal current is 0 (coil deactivated)
• There is no signal current flowing from the con-
troller to coil (5), coil (5) is deactivated.
• For this reason, spool (2) is pushed to the right
in the direction of the arrow by spring (3).
• As a result, port P closes and the pressurized
oil from the control pump does not flow to the
travel pedal PPC valve.
At the same time, the pressurized oil from the
travel pedal PPC valve passes from port C
through port T and is drained to the tank.
10-96
10-97
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
10-97
10-98
STRUCTURE AND FUNCTION EPC, SOLENOID VALVE
Operation
When solenoid is deactiviated
• The signal current does not flow from the con-
troller, so coil (3) is deactivated.
• For this reason, spool (7) is pushed to the left in
the direction of the arrow by spring (6).
• As a result, port A closes the pressurized oil
from the control pump does not flow to the ac-
tuator.
At the same time, the pressurized oil from the
actuator flows from port B to port C, and is then
drained to the tank.
10-98
10-99
STRUCTURE AND FUNCTION TRAVEL/BOOM/STABILISER SOLENOID VALVE
10-99A
10-100
STRUCTURE AND FUNCTION TRAVEL/BOOM/STABILISER SOLENOID VALVE
MEMO
10-99B
10-101
TRAVEL/BOOM/STABILISER SOLENOID VALVE STRUCTURE AND FUNCTION
MEMO
10-100
TRAVEL/BOOM/STABILISER SOLENOID VALVE STRUCTURE AND FUNCTION
MEMO
10-101
TRAVEL/BOOM/STABILISER SOLENOID VALVE STRUCTURE AND FUNCTION
MEMO
10-102
TRAVEL/BOOM/STABILISER SOLENOID VALVE STRUCTURE AND FUNCTION
MEMO
10-103
STRUCTURE AND FUNCTION BOOM HOLDING VALVE
1. Safety-suction valve
2. Pilot spring
3. Pilot spring
4. Poppet spring
5. Poppet
10-104
10-102
STRUCTURE AND FUNCTION BOOM HOLDING VALVE
Operation
1) At boom RAISE
When the boom is raised, the main pressure from the
control valve pushes poppet (5) up.
Because of this, the main pressure from the control
valve passes through the valve and flows to the bot-
tom end of the boom cylinder.
10-105
10-103
STRUCTURE AND FUNCTION BOOM HOLDING VALVE
3) At boom LOWER
When the boom is lowered, the pilot pressure from the
PPC valve pushes pilot spool (3) and the pressurized
oil in chamber b inside the poppet is drained.
When the pressure at port Cy rises because of the
pressurized oil from the bottom end of the boom cylin-
der, the pressure of the pressurized oil in chamber b is
lowered by orifice a.
If the pressure in chamber b drops below the pressure
at port V, poppet (5) opens, the pressurized oil flows
from port Cy to port V, and then flows to the control
valve.
If any abnormal pressure is generated in the circuit at
the bottom end of the boom cylinder, safety valve (1)
is actuated.
10-106
10-104
STRUCTURE AND FUNCTION BOOM HOLDING VALVE
10-105
STRUCTURE AND FUNCTION HYDRAULIC CYLINDERS (Boom & Arm)
ARM CYLINDER
BUCKET CYLINDER
10-107
10-106
STRUCTURE AND FUNCTION HYDRAULIC CYLINDERS
Specifications
1 P/B 2 P/B Unit: mm
Cylinder Boom lift Arm Bucket Boom adjust
10-107
10-108
STRUCTURE AND FUNCTION OUTRIGGER CYLINDER
OUTRIGGER CYLINDER
Cylinder head (4) guides the piston rod (2) which is Important
sealed by seal (9). Seal (9) is protected against dirt Depressurizing the cylinder
by wiper (8). The check valve built into the cylinder prevents any
cylinder movement due to oil leakage within the con-
When oil flows through port I tot he piston side of the trol block or sudden loss of hydraulic pressure due
cylinder the piston rod (2) extends out of the cylinder to a hose burst.
(1). The built in check valve also holds hydraulic pres-
sure within the cylinder when the hydraulic hoses
The piston is guided in the cylinder (1) by the piston are removed from the cylinder.
guide ring (7). It is sealed by the piston ring (14). The
cylinder head is sealed against the cylinder by O- Depressurize the cylinder before opening
ring (13).
To depressurize the cylinder, loosen the plug (23)
When oil fows through port II to the rod side of the carefully using an Allen key and wait until the pres-
cylinder the piston rod retracts. sure has been released. To be absolutely sure the
plug can be completely removed.
10-109
10-108
STRUCTURE AND FUNCTION DOZER BLADE CYLINDER
Cylinder head (4) guides the piston rod (2) which is Important
sealed by seal (11). Seal (11) is protected against Depressurizing the cylinder
dirt by wiper (10). The check valve built into the cylinder prevents any
cylinder movement due to oil leakage within the con-
When oil flows through port I tot he piston side of the trol block or sudden loss of hydraulic pressure due
cylinder the piston rod (2) extends out of the cylinder to a hose burst.
(1). The built in check valve also holds hydraulic pres-
sure within the cylinder when the hydraulic hoses
The piston is guided in the cylinder (1) by the piston are removed from the cylinder.
guide ring (18). It is sealed by the piston ring (16).
The cylinder head is sealed against the cylinder by Depressurize the cylinder before opening
O-ring (20).
To depressurize the cylinder, loosen the plug (8)
When oil fows through port II to the rod side of the carefully using an Allen key and wait until the pres-
cylinder the piston rod retracts. sure has been released. To be absolutely sure the
plug can be completely removed.
10-110
10-109
STRUCTURE AND FUNCTION
1. Arm
2. Bucket cylinder
3. Arm cylinder
4. Boom
5. Boom cylinder
6. Bucket
7. Boom lift cylinder
8. First boom
9. Second boom
10. Boom adjust cylinder
10-111
10-110
10-112A
10-112B
10-112C
STRUCTURE AND FUNCTION ENGINE CONTROL SYSTEM
10-113
10-114
STRUCTURE AND FUNCTION ENGINE CONTROL SYSTEM
1. OPERATION OF SYSTEM
Starting engine
• When the starting switch is turned to the START
position, the starting signal flows to the starting
motor, and the starting motor turns to start the
engine.
When this happens, the engine throttle control-
ler checks the signal from the fuel control dial
and sets the engine speed to the speed set by
the fuel control dial.
Stopping engine
• When the starting switch is placed at the OFF
position, the shut off valve is closed so the sup-
ply of fuel to the engine is shut off and the en-
gine stops.
10-114
10-115
STRUCTURE AND FUNCTION ENGINE CONTROL SYSTEM
2. COMPONENTS OF SYSTEM
1. Knob
2. Dial
3. Spring
4. Ball
5. Potentiometer
6. Connector
FUNCTION
• The fuel control dial is installed at the bottom of
the monitor panel. A potentiometer is installed
under the knob, and when the knob is turned, it
rotates the potentiometer shaft.
When the shaft rotates, the resistance of the
variable resistor inside the potentiometer
changes, and the desired throttle signal is sent
to the engine throttle controller.
The shaded area in the graph on the right is the
abnormality detection area and the engine
speed is set at low idling.
10-115
10-116
STRUCTURE AND FUNCTION ENGINE CONTROL SYSTEM
2. GOVERNOR MOTOR
1. Potentiometer
2. Cover
3. Shaft
4. Dust seal
5. Bearing
6. Motor
7. Gear
8. Connector
FUNCTION OPERATION
• The motor is rotated and the governor lever of Motor stationary
the fuel injection pump is controlled by the drive • Both A phase and B phase of the motor a con-
signal from the engine throttle controller. tinuous, and a holding torque is generated in
• A stepping motor is used for the motor which the motor.
provides the motive power. Motor rotating
• In addition, a potentiometer for giving feedback • A pulse current is applied to the A phase and B
is installed to allow observation of the operation phase from the engine throttle controller to geve
of the motor. synchronous rotation with the pulse.
The rotation of the motor is transmitted to the
potentiometer through a gear.
10-116
10-117
STRUCTURE AND FUNCTION ENGINE CONTROL
10-117
10-118
STRUCTURE AND FUNCTION ENGINE CONTROL
9 Travel selector solenoid Output 8 Starting switch (ACC) Input 8 Radiator water level sensor Input
11 NC 10 NC 10 NC
10-118
10-119
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
5
Engine automatic warming-up, overheat
prevention function
Components of system
10-119
10-120
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
FUNCTION
• There are five modes available for selection • The pump controller detects the actual engine
with the working mode switch on the monitor speed and the speed set by the engine gover-
panel. These modes are the heavy-duty opera- nor through the fuel control dial matches the
tion (H/O) mode, general operation (G/O) pump absorption torque set for each mode, and
mode, lifting operation (L/O) mode, and the carries out control so that the pump absorbs all
breaker operation (B/O) mode. It is possible to of the torque at each output point of the engine.
select the most suitable engine torque and
pump absorption torque to match the nature of
the work
10-120
10-121
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
1. Control method in each mode Heavy-duty travel operation (H/O) travel mode
• Matching point in heavy-duty operation mode: Rated output point
• When the load on the pump rises and the pressure rises, the engine speed goes down.
When this happens, the pump dischrge amount is reduced, and the engine speed is controlled so that it
becomes the rated speed. Just the cut-off at relief is cancelled and the oil flow at relief is increased.
• If the reverse happens and the pressure goes down, the system is controlled so that the pump discharge
amount is increased until the engine speed reaches the rated speed.
by repeating this control, the engine can always be used at near the rated output point
• Matching point in general operation and finishing operation modes: 75 % partial output point.
• When the load on the pump rises and the pressure rises, the engine speed goes down. When this happens,
mutual control of the engine and pump is used to control the system so that the pump absorption torque
follows the equal horsepower curve of the engine,l and the engine speed is lowered while keeping the
torque constant.
• In this way, the engine is used in a range which provides good fuel efficiency.
10-121
10-122
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Breaker operation (B/O) mode Breaker operation (B/O) 60kW (82 PS) 1,910 rpm
• Matching point in lifting operation mode: 70 %
partial output point
• The pump absorption torque in the breaker op-
eration mode is the same as for the general op-
eration and finishing operation modes, and is
controlled to become an even lower speed.
• As a result, the pump absorption torque needed
to ensure the breaker drive is ensured, and
theengine is used in a range that provides a
much better fuel comsumption ration than for
the general operation mode or finishing mode.
10-122
10-123
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
10-124
10-124
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
10-125
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
FUNCTION
10-126
10-126
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
1. LS control function
• The switching point (LS set differential
pressure) for the pump discharge amount
inside the LS valve is changed by changing
the output pressure from the LS control
EPC valve to the LS valve according to the
engine speed and operating condition of
the actuator.
• Because of this, the timing for starting the
discharge amount from the pump can be
optimized, to give excellent ease of
compount operation and fine control
★ For details of the operation, see HYDRAU-
LIC PUMP.
2. Cut-off function
• If the load becomes larger during opera-
tion, and the pump discharge pressure
rises to close to the relief pressure, the
pump pressure sensor detects this and the
controller sends a signal to the TVC valve
to reduce the relief loss.
★ For detalis of the operation, see CLSS
3. Cut-off cancel function
• the cut-off cancel function acts to stop the
operation of the cut-off function in order to
ensure the pump flow when close to the
relief pressure, thereby preventing any
drop in speed.
• The relief pressure when the cut-off is op-
erated is 31.85 MPa (325 kg/cm2), and
when the cut-off cancel function is oper-
ated, the relief pressure becomes approx.
34.8 MPa (355 kg/cm2).
• Actuation conditions for cut-off cancel
function
Swing
Working mode switch Switch Knob switch
lock
Cut-off function Canceled Actuated Canceled Canceled Canceled Actuated Canceled Actuated
10-127
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
5. Fine control mode function • Relationship between working mode and pump
• When the finishing operation (F/O) mode is discharge amount (for independent operation)
selected from the working mode, the pump (%)
LS valve is controlled, and the pump dis-
charge amount is reduced to improve the
Mode Boom Arm
ease of fine control and the precision when
Bucket Swing
finishing.
Actuator RAISE LOWER IN OUT
Heavy-duty
operation
(H/O)
100 50 100 100 50 50
General
operation
(G/O)
Finishing
operation 80 40 60 80 40 40
(F/O)
Lifting
operation 100 50 100 100 50 50
mode (L/O)
6. LS bypass function Breaker
• When the travel is operated at the same operation 100 50 100 100 50 50
time as the work e-quipment or swing, the (B/O)
10-128
10-128
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
FUNCTION
10-129
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Actuated
Heavy-duty working Automatically canceled
Canceled (31.85 34.79 MPa)
operation (H/O work) after 8.5 sec
(325 355 kg/cm2)
10-130
10-130
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
4) Auto-deceleration function
Function
• If all the control levers are at neutral when wait-
ing for work or waiting for a dump truck, the en-
gine speed is automatically recuded to a
midrange speed to reduce fuel consumption
and noise.
• If any lever is operated, the engine speed re-
turns immediately to the set speed.
10-131
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Operation
Control levers at neutral When control lever is operated
• If the engine is running at above the decelera- • If any control lever is operated when the engine
tion actuation speed (approx. 1,400 rpm), and speed is at No. 2 deceleration, the engine
all the control levers are returned to neutral, the speed will immediately rise to the speed set by
engine speed drops immediately to approx. 100 the fuel control dial.
rpm below the set speed to the No. 1 decelera-
tion position.
• If another 4 seconds pass, the engine speed is
reduced to the No. 2 deceleration position
(approx. 1,400 rpm), and is kept at that speed
until a lever is operated.
10-132
10-132
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
FUNCTION
• If the coolant temperature is low, this automati-
cally raises the engine speed to warm up the
engine after it is started. (Automatic warming up
function).
In addition, if the coolant temperature rises too
high during operations, it reduces the load of
the pump to prevent overheating. (Engine over-
heat prevention function).
10-133
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
10-134
10-134
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Normal operation
(coolant temperture below 102°C)
Actuation condition
Normal operation
Coolant tempera-
ture: Below 102°C
(Coolant tempera-
ture gauge:
Green range)
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
10-137
10-135
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Function
• The system is provided with a swing lock and
swing holding brake function.
10-138
10-136
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
1. Swing lock, swing holding brake function • Swing lock switch and swing lock, holding brake
• The swing lock (manual) can be locked at any
desired positon, and the swing holding brake
(automatic) is interconnected with the swing, so Lock Lock Func-
Operation
it prevents any hydraulic drift after the swing is switch lamp tion
stopped. When swing lever is placed at
neutral, swing brake is applied
Swing
after approx. 4 sec; when swing
OFF OFF holding
lever is operated, brake is
brake
canceled and swing can be
operated freely.
Swing lock is actuated and swing
is held in position. Even when
Swing
ON ON swing lever is operated, swing
lock
lock is not canceld and swing
does not move.
10-139
10-137
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
Function
10-140
10-138
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
10-141
10-139
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
8) Components of system
1. Wire Function
2. Magnet • The engine speed sensor is installed to the ring
3. Terminal gear portion of the engine flywheel. It counts
4. Housing electrically the number of gear teeth that pass
5. Connector in front of the sensor, and sends the result to
the pump controller.
• This detection is carried out by a magnet, and
an electric current is generated every time the
gear tooth passes in front of the magnet.
2. PPC oil pressure switch
1. Plut
2. Switch
3. Connector
SPECIFICATONS
Composition of points: N.O. points
Actuation (ON) pressure:
0.49 ± 0.1 MPa (5.0 ± 1.0 kb/cm2)
Reset (OFF) pressure:
0.29 ± 0.05 MPa (3.0 ± 0.5 kg/cm2)
Function
• There are 8 switches installed to the PPC shut-
tle valve. The operating condition of each actua-
tor is detected from the PPC pressure, and this
is sent to the pump controller.
10-142
10-140
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
1. Plug
2. Sensor
3. Connector
Function
• This sensor is installed to the inlet port circuit of
the control valve. It converts the pump dis-
charge pressure to a voltage and sends this to
the controller.
Operation
• When the pressurized oil entering from the
pressure introduction portion pressurized the
diaphragm of the pressure detection portion,
the diaphragm deflects and changes shape.
• A gauge layer is installed to the face opposite
the diaphragm, and the resistance of the gauge
layer converts the deflection of the diaphragm
into an output voltage and sends it to the amp
(voltage amplifier).
• the voltage is further amplified by the amplifier
and is sent to the pump controller.
• Relationship between P (kg/cm2) and output
voltage (v)
V = 0.008 x P + 1.0
★ 1 kg/cm2 = 0.098 MPa
10-143
10-141
STRUCTURE AND FUNCTION ELECTRONIC CONTROL SYSTEM
1. Resistor Function
2. Connector • This resistor acts to allow a suitable current to
flow to the TVC solenoid when the TVC prolix
SPECIFICATION switch is ON.
Resistance: 30 Ω • No currect flows when the TVC prolix switch is
OFF
7. TVC valve
★ See HYDRAULIC PUMP
10-144
10-142
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
10-145
10-143
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
1. Monitor panel
10-146
10-144
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
When engine is
Symbol Display item Display range When engine is running
stopped
Flashes and buzzer
Coolant level Below low level Flashes when abnormal
sounds when abnormal
Below 1,500 rpm:
Lights up when normal
Engine oil below 0.05 MPa (0.5 kg/cm2) Flashes and buzzer
(goes out when engine
pressure Above 1,500 rpm: sounds when abnormal
starts)
below 0.15 MPa (1.5 kg/cm2)
Air cleaner
When clogged OFF Flashes when abnormal
clogging
Lights up when normal
Charge level When charging is defective (goes out when engine Flashes when abnormal
starts)
Engine oil
Below low level Flashes when abnormal OFF
level
Oil
maintenance
10-147
10-145
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
KNOB BUTTON
TRAVEL SPEED Hi 씯씮 Mi 씯씮 Lo
10-148
10-146
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
2. Sensors
• The signals from the sensor are input directly to
the monitor panel.
The contact type sensors are always con-
nected at one end to the chassis GND.
When When
Name of sensor Type of sensor
normal abnormal
ON OFF
Coolant level Contact type
(closed) (open)
ON OFF
Engine oil level Contact type
(closed) (open)
Coolant
Resistance type - -
temperature
1. Sub-tank
2. Float
3. Sensor
4. Connector
10-149
10-147
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
1. Connector
2. Bracket
3. Float
4. Switch
1. Plug
2. Contact ring
3. Contact
4. Diaphragm
5. Spring
6. Terminal
1. Connector
2. Plug
3. Thermistor
10-150
10-148
STRUCTURE AND FUNCTION MACHINE MONITOR SYSTEM
1. Float
2. Connector
3. Cover
4. Variable resistor
10-151
10-149
STRUCTURE AND FUNCTION OVERLOAD WARNING DEVICE
Function
• The Reverse alarm is to warn any persons that
the vehicle they are standing around is in the
process of reversing.
Operation
• When the travel pedal is moved to the reverse
position an electric signal is sent, via the Travel
Reverse Pressure Switch, to the reverse alarm.
This sounds the Warning Buzzer with a loud in-
termittent alarm.
10-152
10-150
STRUCTURE AND FUNCTION
10-151
10-153
STRUCTURE AND FUNCTION BREAKER MODE HYDRAULIC PERFORMANCE
Main
valve
Attachment
Bypass
Pump Filter valve
Pb
Tank
10-154
10-152
STRUCTURE AND FUNCTION BREAKER MODE HYDRAULIC PERFORMANCE
Main
valve
Attachment
Bypass
Pump Filter valve
Pb
Tank
10-155
10-153
TESTING AND ADJUSTING
Table of judgement standard value .............. 20- 2 Testing and adjusting PPC pressure ............ 20- 33
Standard value table for electrical parts ....... 20- 12 Testing EPC valve, solenoid valve output
Checking and adjusting belt tension for pressure ....................................................... 20- 35
air conditioner compression ......................... 20- 20 Measuring PPC valve output pressure
Adjusting engine speed sensor ....................20- 21 and testing PPC shuttle valve ......................20- 37
Testing and adjusting governor motor Adjusting work equipment
lever stroke...................................................20- 22 • swing PPC valve ........................................20- 39
Testing clearance of swing circle bearing ..... 20 -24 Testing locations causing hydraulic
Testing and adjusting hydraulic pressure drift of working equipment ............................20- 40
in work equipment, swing, travel circuit ........20- 25 Measuring oil leakage ..................................20- 42
Testing and adjusting TVC valve output Releasing remaining pressure in
pressure (servo piston input pressure) .........20- 28 hydraulic circuit ............................................20- 43
Testing and adjusting LS valve output Bleeding air .................................................. 20- 44
pressure (servo piston input pressure) and Accumulators ...............................................20- 46
LS differential ...............................................20- 30 Troubleshooting ............................................20- 50
When carruing out testing, adjusting, or troubleshooting, park the machine on level ground and use the
safety pins and blocks to prevent the machine from moving.
When carrying out work together with other workers, always use signals and do not let unauthorized
people near the machine.
When checking the water level, always wait for the water to cool down. If the radiator cap is removed
when the water is still hot, the water will spurt out and cause burns.
Be careful not to get caught in the fan, fan belt, or other rotating parts.
20-1
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
Engine SA4DI02E
20-2
TESTING AND ADJUSTING
•
★
Cate-
gory
Engine speed
Spool stroke
Travel of control levers
Operating force of control levers
FOR CHASSIS
tion) mode.
Item
Service valve
Brake pedal
Machine model
Measurement conditions
• Coolant temperature:
rpm
mm
mm
53 ±
TABLE OF JUDGEMENT STANDARD VALUE
The standard values and permissible values shown in this table are all values for H/O (heavy-duty opera-
l
Standard value
Min. 2,100
Min. 2,100
1,400 ± 200
0.5 12
a
80 ± 10
80 ± 10
80 ± 10
80 ± 10
10 ± 5
15.7 ± 2.9
(1.6 ± 0.3)
15.7 ± 2.9
(1.6 ± 0.3)
12.7 ± 2.9
(1.3 ± 0.3)
12.7 ± 2.9
(1.3 ± 0.3)
325 ± 25
(33 ± 2.5)
0.5 8
PW170-6k
0.5 53
l
Permissible value
2,100 ± 50
2,100 ± 50
1,400 ± 200
0.5 12
a
80 ± 10
80 ± 10
80 ± 10
80 ± 10
10 ± 5
Max. 24.5
(Max. 2.5)
Max. 24.5
(Max. 2.5)
Max 21.6
(Max 2.2)
Max 21.6
(Max 2.2)
Max. 488
(Max. 50)
0.5 8
20-3
b
0.5
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
Cate-
Item Measurement conditions Unit Standard value Permissible value
gory
• Engine at high idling
• Hydraulic oil temperature:
Operating force of control levers
45 - 55°C
• Measure max. value to end of travel
Travel
34.79± 0.98 34.79± 1.96
(355± 10) (355± 20)
Stabiliser
Levers at neutral
LS differential pressure • Hydraulic oil Controllevers at
• temperature neutral 3.9± 1.0 3.0± 1.0
45 - 55°C
(40± 10) (40± 10)
TVC valve output pressure • Engine at high idling Normal
• In H/O mode Pump
(servo piston input Power
relief
pressure) max.
20-4
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
20-5
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
45 - 55°C
• Set machine on 15° slope, and set
upper structure at 90° to the side
• Make match marks on swing circle
outer race and track frame
• Measure distance that match marks
move apart after 15 minutes
Lo 36 30-42
sec.
Mi
Travel speed • Engine at high idling 18 15-21
• Hydraulic oil temperature:
45 - 55°C
• In H/O mode 20 kph
• Run up for at least 200 m, sec 9 8.6 - 9.4
and measure time taken to Hi
travel next 50 m on flat 30 kph
ground. sec 6 5.8 - 6.2
Travel
mm 0 0
Hydraulic drift of
travel
• Engine stopped
• Hydraulic oil temperature:
45 - 55°C
• Stop machine on 12° slope
• Apply park brake
• Measure the distance the
machine moves in 5 minutes
20-6
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
motor(s)
Boom cylinder
Hydraulic drift of work equipment
(amount of
retraction of Max. 5 Max. 7.5
cylinder)
• Place in above posture and
2nd Boom measure extension or retraction of
cylinder (amount each cylinder and downward
of extension of movement at tip of bucket teeth mm Max. 5 Max. 7.5
cylinder) • Bucket: Rated load
• Horizontal, flat ground
Arm cylinder • Levers at neutral
• Engine stopped
Work equipment
(amount of
extension of • Hydraulic oil temperature: Max. 30 Max. 45
cylinder) 45 - 55°C
• Start measuring immediately after
Bucket cylinder setting
(amount of • Measure hydraulic drift every 5
retraction of minutes, and judge from results for 0 0
cylinder) 15 minutes
RAISE
Work equipment speed
Bucket teeth in
contact with
ground sec.
씯씮
LOWER
Cylinder fully
extended • Engine at high idling 2.8±0.3 Max. 3.2
• Hydraulic oil temperature:
45 - 55°C
20-7
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
IN
Arm cylinder fully
retracted
씯씮
Work equipment speed
fully extended
OUT
• Engine at high idling 3.0±0.3 Max. 3.6
• Hydraulic oil temperature:
45 - 55°C
CURL
3.6±0.4 Max. 4.3
Bucket cylinder
fully retracted
씯씮
DUMP
fully extended
• Engine at high idling 2.2±0.3 Max. 2.8
• Hydraulic oil temperature:
45 - 55°C
sec
Work equipment
Boom
Max. 2.0 Max. 3.0
• Lower boom and measrue time
taken from point where bucket
contact ground to point where
chassis rises from ground
• Engine at low idling
Time lag
Arm
Max. 1.0 Max. 2.8
20-8
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
Bucket
Cylinders
Center swivel joint
Time lag
20-9
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
Cate-
gory
PUMP PRESSURE P(kg/cm2 ) PW170-6K (H.O WORK TRAVEL)
Performance of hydraulic pump
Pump Q (l/min)
• pump speed: At 2.200 rpm, TVC current 330 mA
★ As far as possible, bring pump discharge pressures P as close as possible to the average pres-
sure when measuring.
The error is large near the point where the graph curves, so avoid measuring at this point.
★ When measuring with the pump mounted on the machine, if it is impossible to set the engine
speed to the specified speed with the fuel control dial, take the pump discharge amount and the
engine speed at the point of measurement, and use them as a base for calculating the pump
discharge amount at the specified speed.
20-10
TESTING AND ADJUSTING TABLE OF JUDGEMENT STANDARD VALUE
20-11
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
resistance
Measure
2) Disconnect
Fuel control dial E06 (male) Between (1) - (2) 0.25 - 7 k⏲
connector.
Between (2) - (3) 0.25 - 7 k⏲
Between (1) - (3) 4 - 6 k⏲
If the condition is within the range shown in the 1) Turn starting
table below, it is normal switch OFF.
resistance
Measure
2) Disconnect
Between (1) - (2) 0.25 - 7 k⏲
Potentiometer E04 (male) connector.
Between (2) - (3) 0.25 - 7 k⏲
Between (1) - (3) 4 - 6 k⏲
If the condition is as shown in the table below, it is 1) Turn starting
Governor motor
connector.
Measure
switch OFF.
Control system
(male)
Measure
20-12
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
Measure
Pump pressure C08 control dial to
voltage
Between (2) - (1) 18 - 28 V
sensor (male) MAX position
(front) 3) Insert T -
Between All levers at neutral 0.5 - 1.5 V
adapter
(3) - (1) At arm IN relief 3.1 - 4.5 V
resistance
Measure below, it is normal switch OFF.
Swing lock switch X05 Between When switch is OFF Min. 1 M⏲ 2) Disconnect
(1) - (2)
(female) Between
connector
(3) - (4) When switch is ON Max. 1 ⏲ C02
Swing holding If the condition is within the range shown in 1) Turn starting
resistance
Measure
20-13
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
resistance
Measure
C10 the table below, it is normal switch OFF.
LS-EPC solenoid (male) 2) Disconnect
Between (1) - (2) 7 - 14 ⏲
connector
Between (1), (2) - chassis Min. 1 M⏲ C10.
voltage
2.9 - 3.3 V
Governor C03 (low idling) T - adapter
potentiometer Between (14) - (17)
0.5 - 0.9 V
(high idling)
Aprrox. 37 - 50 k⏲
Measure
20-14
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
Measure
(solenoid ON, swing switch OFF.
voltage
brake sole- C01 holding brake canceled) 4) Insert T -
noid Between
Approx. 5 sec after adapter.
(3) -
swing lever and work ★ The lever can
(6), (12)
equipment control be operated
levers are placed at 20 - 30 V slightly
neutral (solenoid OFF, (without
swing holding brake moving the
applied) equipment).
20-15
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
Measure
• G/O mode ( Hi-idle, swing lock off
current
TVC solenoid C02 2) Turn fuel
valve (default lever neutral control dial to
value) MAX positon
Between front (8) - (18) 410 ± 40 mA
3) Turn prolix
switch OFF.
If the condition is as shown in the table below, it is 1) Turn starting
LS-EPC C02 normal switch ON.
• G/O mode
Measure
current
normal
voltage
S-NET 2) Insert T -
Between (4), (12) - GND 4-8V adapter
20-16
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
resistance
Measure
the table below, it is switch OFF.
3) Disconnect
Between (1) - (2) 500 - 1000 ⏲
connector.
Between (2) - chassis Min. 1 M⏲
Measure
1) Start engine.
voltage
Measure with AC range
Engine speed E07 2) Insert T -
Between (1) - (2) 0.5 - 3.0 V
sensor adapter.
Adjust 1) Screw in rotation sensor until it contacts
ring gear, then turn back 1 ± 1/6 turns
2) It must work normally when adjusted as
above.
2) Disconnect
Measure
20-17
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
resistance
Pressure Closes at 0.08 ± 0.014 MPa
sure sensor P10 Measure dropping (Continuity) (0.85 ± 0.14 kg/cm2) ness termi-
nal.
Sensor connector
3) Start engine.
4) Put tester in
contact
between
sensor
terminals
A & C.
to stopper
4) Insert T -
adapter into
sensor.
★ Connect the
T - adapter to
the connector
and sensor
flange.
20-18
TESTING AND ADJUSTING STANDARD VALUE TABLE FOR ELECTRICAL PARTS
Measure
voltage
alternator above) below, the sensor is defective.
Alternator terminal 씮 27.5 - 29.5 V
R and ★ If the battery is old, or after starting in
chassis cold areas, the voltage may not rise for
some time.
★ Level 1 flashes.
20-19
CHECKING AND ADJUSTING BELT TENSION FOR AIR
TESTING AND ADJUSTING CONDITONER COMPRESSOR
ADJUSTING
1. Loosen two nuts and bolts 햳.
2. Carefully lever compressor housing as shown to
tighten belt to tightness criteria. Tighten lower bolt to
hold in position.
3. Tighten upper bolt.
4. Check each pulley for damage, wear of the V-groove
and wear of the V-belt. In particular, be sure to check
the V-belt is not touching the bottom of the V-groove.
5. Replace belt if it has streched, leaving no allowance
for adjustment, or if there is a cut or crack on belt.
6. Refit belt guard.
7. When the new belt is set, readjust it after operating for
one hour.
20-20
TESTING AND ADJUSTING ADJUSTING ENGINE SPEED SENSOR
20-21
TESTING AND ADJUSTING TESTING AND ADJUSTING GOVERNOR MOTOR LEVER STROKE
ADJUSTMENT
20-22
TESTING AND ADJUSTING TESTING AND ADJUSTING GOVERNOR MOTOR LEVER STROKE
20-23
TESTING AND ADJUSTING TESTING CLEARANCE OF SWING CIRCLE BEARING
TESTING CLEARANCE OF
SWING CIRCLE BEARING
Method of testing clearance of swing circle bearing
when mounted on machine
1. Fix a magnet-type dial gauge to the outer circle (or Chassis Chassis
inner circle) of the swing circle, and put the tip of the
probe in contact with the inner circle (or outer circle).
Set the dial gauge at the front or rear.
20-24
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN
TESTING AND ADJUSTING WORK EQUIPMENT, SWING, TRAVEL CIRCUIT
20-25
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK
TESTING AND ADJUSTING EQUIPMENT, SWING, TRAVEL CIRCUIT
20-26
TESTING AND ADJUSTING HYDRAULIC PRESSURE IN
TESTING AND ADJUSTING WORK EQUIPMENT, SWING, TRAVEL CIRCUIT
ADJUSTING
Locknut:
58.8 ± 4.9 Nm (6 ± 0.5 kgm)
Locknut:
44.1 ± 4.9 Nm (4.5 ± 0.5 kgm)
20-27
TESTING AND ADJUSTING TVC VALVE OUTPUT PRESSURE
TESTING AND ADJUSTING (SERVO PISTON INPUT PRESSURE)
[Reference]
If there is any abnormality in the LS valve or servo
piston, the servo piston input pressure will be almost
the same or 0 of the pump discharge pressure.
20-28
TESTING AND ADJUSTING TVC VALVE OUTPUT PRESSURE
TESTING AND ADJUSTING (SERVO PISTON INPUT PRESSURE)
ADJUSTING
★ If the load becomes larger, the engine speed will drop.
Or if the engine speed remains normal, the work
equipment speed will drop. In such cases, if the pump
discharge pressure and LS differential pressure are
normal, adjust the TVC valve as follows.
1. Loosen locknut (3), and if the speed is slow, turn
screw (4) to the left; if the engine speed drops, turn the
screw to the right.
★ If the screw is turned to clockwise the pump ab-
sorption torque will be increased, and if it is
turned to anticlockwise pump absorption torque
will be reduced.
2. After completing the adjustment, tighten thr locknut.
Locknut:Nm (kgm)
20-29
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO
TESTING AND ADJUSTING PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE
MEASURING
1. Measuring LS valve output pressure (servo piston in-
put pressure).
1) Remove pressure measurements plugs (1) and
(2) and install oil pressure gauge C1.
★ Install a 39.2 MPa (400 kg/cm2) gauge to the
servo end, and a 58.8 (600 kg/cm2)
gauge to the pump outlet port end.
• Oil pressure when travel is rotating under no load
(wheels OFF the ground).
i) Set the working mode tp H/O mode, and turn the
travel speed switch to HI.
ii) Use the work equipment and/or undercarriage at-
tachment to raise the wheels OFF the ground.
iii) Measure the oil pressure with the engine at high
idling and the travel pedal operated to the end of
its stroke to rotate the wheels under no load. Run
the engine at high idling, operate the travel pedal
to the end of its stroke, and measure the oil pres-
sure when the working mode and travel speed
are switched as shown in Table 1.
Table 1
Pump Servo inlet
Working Travel
pressure MPa port pressure Remarks
mode pedal
(kg/cm2) (MPa (kg/cm2))
20-30
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO
TESTING AND ADJUSTING PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE
Table 2
Differential
Working Fuel
Operation pressure
mode control dial
(MPa (kg/cm2))
3.9 ± 1.0
H/O mode MAX Pedal at neutral
(40 ± 10)
Travel speed: Hi
2.6 ± 0.1
H/O mode MAX Travel circuit under no load
(26 ± 1)
(pedal fully operated)
20-31
TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO
TESTING AND ADJUSTING PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE
ADJUSTING
1. Adjusting LS valve
When the differential pressure is measured under the
conditions above, and the results show that the differ-
ential pressure is not within the standard value, adjust
as follows.
1) Loosen locknut (4) and turn screw (5) to adjust
the differential pressure.
★ Turn the screw to adjust the differential pressure
as follows.
• To INCREASE pressure, turn CLOCKWISE
• To DECREASE pressure, turn COUNTER-
CLOCKWISE
2) After adjusting, tighten locknut (4)
Locknut:
29.4 ± 4.9 Nm (3.0 ± 0.5kgm)
20-32
TESTING AND ADJUSTING TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE
20-33
TESTING AND ADJUSTING
20-34
TESTING AND ADJUSTING TESTING EPC VALVE SOLENOID VALVE OUTPUT PRESSURE
Table 1
Output
Engine (Reference)
Operation pressure
speed (rpm) Current (A)
MPa (kg/cm2)
All control levers at 2.5
Min. 1100 800 ± 80
neutral (26)
Travel lever operated, 0.2 ± 0.2
Max. 1900 0
travel speed Hi (2 ± 2)
20-35
TESTING AND ADJUSTING TESTING EPC VALVE SOLENOID VALVE OUTPUT PRESSURE
Table 2
2.94± 0.49
Suspension lock switch ON Sus lock actuated ON
Suspension (30± 5)
4
lock
Suspension lock switch OFF Sus lock cancelled OFF 0
20-36
MEASURING PPC VALVE OUTPUT PRESSURE
TESTING AND ADJUSTING AND TESTING PPC SHUTTLE VALVE
20-37
MEASURING PPC VALVE OUTPUT PRESSURE
TESTING AND ADJUSTING AND TESTING PPC SHUTTLE VALVE
1. Swing PPC shuttle valve 4. Stabiliser / 2 piece boom PPC shuttle valve
2. PPC shuttle valve for LS select 5. 2 Piece boom PPC shuttle valve
3. Stabiliser PPC shuttle valve
20-38
TESTING AND ADJUSTING ADJUSTING WORK EQUIPMENT, SWING PPC VALVE
20-39
TESTING LOCATIONS CAUSING HYDRAULIC
TESTING AND ADJUSTING DRIFT OF WORK EQUIPMENT
[Reference]
If the cause of the hydraulic drift is in the packing, and
the above operation is carried out, the downward
movement becomes faster for the following reasons.
1) If the work equipment is set to the above posture 3) When the pressure is balanced, the down-
(holding pressure applied to the bottom end), the ward movement becomes slower. If the lever
oil at the bottom end leaks to the head end. How- is then operated according to the procedure
ever, the volume at the head end is smaller than given above, the circuit at the head end is
the volume at the bottom end by the volume of the opened to the drain circuit (the bottom end is
rod, so the internal pressure at the head end in- closed by the check valve), so the oil at the
creases because of the oil flowing in from the bot- head end flows to the drain circuit and the
tom end. downward movement becomes faster.
2) When the internal pressure at the head end in-
creases, the pressure at the bottom end also rises
in proportion to this. the balance is maintained at a
certain pressure (this differs according to the
amount of leakage) by repeating this procedure.
20-40
TESTING LOCATIONS CAUSING HYDRAULIC
TESTING AND ADJUSTING DRIFT OF WORK EQUIPMENT
20-41
TESTING AND ADJUSTING MEASURING OIL LEAKAGE
20-42
TESTING AND ADJUSTING RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
2. Swing motor
1) Disconnect drain hose (1) from the swing motor,
then fit a blind plug at the tank end.
2) Turn the swing lock switch ON.
3) Start the engine and operate the swing relief with
the engine at high idling.
4) Continue this condition for 30 seconds, then
measure the oil leakage for the next one minute.
★ After measuring, swing 180° and measure
again.
3. Travel motor
1) Disconnect drain hose (2) from the travel motor,
then fit a blind plug at the tank end.
2) Apply park brakes
3) Start the engine and operate the travel relief with
the engine at high idling.
2
When measuring the oil leakage from the travel
motor, mistaken operation of the control lever
may lead to a serious accident, so always use sig-
nals and check when carrying out this operation.
RELEASING REMAINING
PRESSURE IN HYDRAULIC
CIRCUIT
★ No accumulator is installed, so the pressure remain-
ing in the piping between the control valve and the
hydralic cylinder or swing motor cannot be released by
operating the control levers. Therefore, when remov-
ing the above piping, be careful of the following points.
20-43
TESTING AND ADJUSTING BLEEDING AIR
BLEEDING AIR
Order for operations and procedure for bleeding air
Air bleeding item Air bleeding procedure
1 2 3 4 5 6
Note 1: Bleed the air from the swing and travel motors only when the oil inside the motor case has been drained.
20-44
TESTING AND ADJUSTING BLEEDING AIR
20-45
TESTING AND ADJUSTING ACCUMULATORS
ACCUMULATORS
CHARACTERISTIC DETAILS
Charging hose
with cap screw G1
(fem. thread W 24.32 x 1/14" - DIN 477) suitable for
direct connection with nitrogen bottles in Germany,
Netherlands, Switzerland, Sweden, Finnland, Russia,
Belgium (see point 4.3).
Case
Accessories
full details required when ordering
Gas safety valve with intermediate piece (see point 4.5)
Pressure release valve with connector (see point 4.5)
Adapter for cap screw D (see point 4.1)
2. Weight
2.2 kg with case
1.0 kg without case
3. Mounting position
Optional
20-46
TESTING AND ADJUSTING ACCUMULATORS
OPERATING INSTRUCTIONS
20E-60-K1150
Max. working pressure (p2) = 210 bar
Gas pre-charge (P0) = 50 bar
3. PREPARATION
Prior to each testing, charging or topping-up of
nitorgen, the accumulator has to be separated from
the pressurised system by means of the shut-off valve
and the fluid has to be released. The protective cap S
has to be unscrewed. Slightly loosen the int.hex.
screw by means of an Allen key GW 0, DIN 911
(approx 1/2 turn). Screw cap nut D by hand onto accu-
mulator gas valve. Turn charging unit to a position
where the gauge can be easily read.
4. TESTING
Valve V is opened by loosening the int.hex. screw with
spindle A. After the pointer of the gauge begins to
deflect unscrew the spindle by a further full turn.
The gauge now shows the charging pressure in de ac-
cumulator. The check valve prevents any escape of ni- Piston and diaphragm accumulators
trogen. (gas valve)
5. PRESSURE RELEASE
By carefully opening relief valve B, the nitrogen es-
capes into the atmosphere.
20-47
TESTING AND ADJUSTING ACCUMULATORS
20-48
TESTING AND ADJUSTING ACCUMULATORS
20-49
TESTING AND ADJUSTING
TROUBLESHOOTING
20-50
TROUBLESHOOTING POINTS TO REMEMBER WHEN TROUBLESHOOTING
The aim of troubleshooting is to pinpoint the basic cause of the failure, to carry out repairs swiftly, and to
prevent reoccurrence of the failure.
When carrying out troubleshooting, an important point is of course to understand the structure and function.
However, a short cut to effective troubleshooting is to ask the operator various questions to form some idea
of possible cuases of the failure that would produce the reported symptoms.
1. When carrying out thoubleshooting, do not 5) Other maintenance items can be checked
hurry to disassemble the components. If com- externally, so check any item that is consid-
ponents are disassembled immediately any fail- ered to be necessary.
ure occurs: 4. Confirming failure
• Parts that have no connection with the fail- • Confirm the extent of the failure yourself,
ure or other unnecessary parts will be dis- and judge whether to handle it as a real
assembled. failure or as a problem with the method of
• It will become impossible to find the cause operation etc.
of the failure. ★ When operating the machine to
It will also cause a waste of manhours, parts, or reenact the troubleshooting symp-
oil or grease, and at the same time, will also toms, do not carry out any investiga-
loose the confidence of the user or operator. tion or measurement that may make
For this reason, when carrying out trouble- the problem worse.
shooting, it is necessary to carry out thorough 5. Troubleshooting
priorinvestigation and to carry out troubleshoot- • Use the results of the investigation and in-
ing in accordance with the fixed procedure. spection in items 2-4 to narrow down the
2. Points to ask user or operator causes of failure, then use the trouble-
1) Have any other problems occurred apart shooting flowchart to locate the position of
from the problem that has been reported? the failure exactly.
2) Was there anything strange about the ma- ★ The basic procedure for troubleshoot-
chine before the failure occurred? ing is as follows.
3) Did the failure occur suddenly, or were 1) Start from the simple points
there problems with the machine condition 2) Start from the most likely points
before this? 3) Investigate other related parts or
4) Under what conditions did the failure oc- information.
cur? 6. Measures to remove root cause of failure
5) Had any repairs been carried out before • Even if the failure is repaired, if the root
the failure? cause of the failure is not repaired, the
When were these repairs carried out? same failure will occur again.
6) Has the same kind of failure occurred be- To prevent this, always investigate why the
fore? problem occurred. Then, remove the root
3. Check before troubleshooting cause.
1) Check the oil level
2) Check for any external leakage of oil from
the piping or hydraulic equipment.
3) Check the travel of the control levers
4) Check the stroke of the control valve spool
20-51
TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING
Step 1
Examination, confirmation of symptoms
Step 2
Determining probable location of cause
Step 3
Preparation of troubleshooting tools
Step 6
Re-enacting failure
Step 4 Step 5
Go to jobsite Ask operator questions to confirm details
of failure
20-52
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
PRECAUTIONS WHEN
CARRYING OUT MAINTENANCE
To maintain the performance of the machine over a long
period, and to prevent failures or other troubles before they
occur, correct operation, maintenance and inspection,
troubleshooting, and repairs must be carried out. This sec-
tion deals particularly with correct repair procedures for
mechatronics and is aimed at improving the quality of re-
pairs. For this purpose, it gives sections on "Handling elec-
tric equipment" and "Handling hydraulic equipment" (par-
ticularly hydraulic oil).
20-53
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
20-54
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
Disconnecting connectors
(1) Hold the connectors when disconnecting.
When disconnecting the connectors, hold the
connectors and not the wires.
For connectors held by a screw, loosen the screw
fully, then hold the male and female connectors in
each hand an pull apart. For connectors which
have a lock stopper, press down the stopper with
your thumb and pull the connectors apart.
Connecting connectors
(1) Check the connector visually
a. Check that there is no oil, dirt or water stuck to the
connector pins (mating portion).
b. Check that there is no deformation, defective con-
tact, corrosion, or damage to the connector pins.
c. Check that there is no damage or breakage to the
outside of the connector.
★ If there is any oil, water, or dirt stuck to the con-
nector, wipe it off with a dry cloth. If any water has
got inside the connector, warm the inside of the
wiring with a dryer, but be carful no to make it too
hot as this will cause short circuits.
★ If there is any damage or breakage, replace the
connector.
20-55
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
20-56
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
20-57
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
3) Sealing openings
After any piping or equipment is removed, the open-
ings should be sealed with caps, tapes, or vinyl bags
to prevent any dirt or dust from entering. If the opening
is left open or is blocked with a rag, there is danger of
dirt entering or of the surrounding area being made
dirty by leaking oil so never do this. Do not simply drain
oil out on to the ground, collect it and ask the customer
to dispose of it, or take it back with you for disposal.
20-58
TROUBLESHOOTING PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
6) Flushing operations
After disassembling and assembling the equipment,
or changing the oil, use flushing oil to remove the con-
taminants, sludge and old oil from the hydraulic circuit.
Normally flushing is carried out twice: primary flushing
is carried out with flushing oil, and secondary flushing
is carried out with the specified hydraulic oil.
7) Cleaning operations
After repairing the hydraulic equipment (pump, control
valve, etc.) or when running the machine, carry out oil
cleaning toi remove the sludge or contaminants in the
hydraulic oil circuit.
The oil cleaning equipment is used to remove the
ultrafine (about 3 u) particles that the filter built into the
hydraulic equipment cannot remove, so it is an ex-
tremely effective device.
20-59
TROUBLESHOOTING CHECKS BEFORE TROUBLESHOOTING
20-60
TROUBLESHOOTING CONNECTOR TYPES
CONNECTOR TYPES
Con- Con- No. Con- Con-
No. of
nector nector of Electrical component nector nector Electrical component
pins
No. type pins No. type
AMP
A01 KES1 2 Window washer circuit G03 7 Horn, wash, lights switch
925
AMP
A02 KES1 2 Swing park brake solenoid G04 7 Taillight
925
A03 KES1 2 Diode G05 _ 2 O/Load caution switch
A04 KES1 2 2-stages relief solenoid circuit G7 X 4 Taillight
A05 KES1 2 Swing brake solenoid cicuit G8 X 4 Number plate lamp
A07 KES1 2 Travel speed solenoid circuit G9 X 2 H/light
SIMPLE
A08 KES1 2 Heater circuit G10 CONN- 3 H/light
ECTOR
SIMPLE
A11 KES1 2 Alarm buzzer circuit G11 CONN- 3 Indicator
ECTOR
A13 KES1X 2 Battery relay drive circuit G12 X 2 Indicator
A14 KES1 2 Battery relay drive circuit G13 X 2 Sidelight
A16 KES1 2 Fuel shut off circuit G14 AMP 1 sidelight
A17 KES1 2 Horn G15 AMP 1 P/brake sol
REXR-
C01 MIC 17 Pump controller G18 2 Diode
OTH
C02 040 20 Pump controller G19 KES1 2 Boom/outrigger sol
C03 040 16 Pump controller G21 X 2 Boom/outrigger sol
C05 S 10 TVC prolix switch G23 X 2 Diode
C06 M 2 TVC prolix resistor G24 KES1 2 Susp lock sol valve
C08 X 3 Pump pressure sensor G25 X 2 Susp lock sol valve
C10 X 2 LS control EPC solenoid valve G26 X 3 Clamshell rotation sol
C13 X 2 Pump TVC solenoid valve G27 X 2 Low brake press switch
SIMPLE
C17 040 16 Governor, pump controller G28 CONN- 1 Park brake switch
ECTOR
SIMPLE
C16 MIC 17 Governor, pump controller G29 CONN- 1 Brake light switch
ECTOR
E04 X 3 Governor potentiometer G33 KES1 2 Heated seat
E05 M 4 Governor motor G35 LUCAS STD W/lights relay
E06 X 3 Fuel control dial G36 LUCAS Lower wiper relay
E07 - 2 Engine speed sensor G41 M 1 Beacon
E08 SWP 14 Intermediate connector G47 KES1 2 Diode
SIMPLE
E09 3 Fuel shut off valve G49 CONN- 1 Refuelling pump
ECTOR
SIMPLE
E11 L 1 Heater relay G51 CONN- 1 ENG room lamp
ECTOR
E12 3 ALTERNATOR G52 KES0 4 Lower wiper
E13 2 STARTER G53 HELLA 6 Flasher unit
SIMPLE
F01 X 2 Travel alarm G54 CONN- 1 SUS lock switch
ECTOR
20-61
TROUBLESHOOTING CONNECTOR TYPES
20-62
TROUBLESHOOTING CONNECTOR TYPES
20-63
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-64
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-65
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-66
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
10
16
20-67
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
16
20
20-68
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
14
18
20-69
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-70
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
14
20-71
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
17
21
20-72
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
No.
of Ring connector
pins
20-73
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-74
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-75
TROUBLESHOOTING CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
20-76
TROUBLESHOOTING EXPLANATION OF CONTROL MACHANISM FOR ELECTRICAL SYSTEM
20-77
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
20-78
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
Operation Display
1. To set to the trouble data display mode. 1. On the tme display and service meter display, the service
Keep the TIME switch + L.H. travel code and number of hours (service meter hours) that
speed switch pressed for 2.5 seconds. have elapsed since the occurrense of the abnormality are
Note: It is possible to call it up at the fol- displayed.
lowing times. • Example of display : When E212 has occured 12
1) In the normal mode hours before (service meter)
2) In the user code display mode 1) Display of service code 2) Display of elapsed time
3) In the machine data monitoring
mode
4) In the time adjustment mode
20-79
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
Operation Display
4. To finish with the trouble data display 4. If there is no abnormality code in memory
mode, keep the TIME switch + L.H.
travel speed switch pressed for 2.5 sec-
onds.
5. To erase the memory, keep the time
switch pressed, turn the starting switch
from OFF to ON, and keep the time
switch pressed for 5 seconds.
Operation Display
1. To set the machine data monitoring 1. On the time display and service meter display, the moni-
mode, do as follows. toring code and data are displayed.
Keep the time switch + knob button func- • Example of display
tion switch pressed for 2.5 seconds. 1) When engine speed is monitoring (monitoring code
Note: this is possible at the following 10)
times.
1) During the normal code
2) During the user code display
3) During the time adjustment mode
4) During the trouble data display
mode
20-80
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
Operation Display
20 Governor, pump controller PPC oil pressure switch input signal (1) B Governor, pump controller
21 Governor, pump controller PPC oil pressure switch input signal (2) B Governor, pump controller
22 Governor, pump controller PPC oil pressure switch input signal (3) B Governor, pump controller
24 Input condition of sensor for governor, pump controller monitor warning 1 B Governor, pump controller
25 Input condition of sensor for governor, pump controller monitor warning 2 B Governor, pump controller
20-81
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
★ For detalis of the B in the Unit column, see the bit pattern chart in the next section.
20-82
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
20-83
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
(5)
(6)
(1) KEY ON SW OFF
(2) Terminal BR Voltage Hi
(3) LIGHT SW OFF
49 Monitor panel input condition 2
(4) Preheating switch OFF
(5) START C Sometimes turns ON
(6)
20-84
TROUBLESHOOTING DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
Operation Display
2. To return to the time display mode use 2. Buzzer sounds once a second
the same procedure as in step 1.
Operation Display
1. To set the time adjustment mode, keep 1. The time mark portion flashes
the time switch depressed for 2.5
seconds.
20-85
TROUBLESHOOTING METHOD OF USING JUDGEMENT TABLE
[Judgement]
1) If a service code is being displayed on the monitor panel…go to troubleshooting [E3:쎻쎻 ] for the governor,
pump controller (governor control system).
2) If no service code is displayed on the monitor panel, and the engine does not start:
20-86
TROUBLESHOOTING METHOD OF USING JUDGEMENT TABLE
2. When using judgement table for governor, pump controller (governor control sustem) and hydraulic related
parts.
• If a service code is displayed on the monitor panel, go to the troubleshooting code at the bottom of the
judgement table (C-쎻쎻).
(A 쏹 mark is put at the places where the failure mode and service code match.)
• If a problem has appeared but no service code is displayed on the monitor panel, go to the point where
the failure mode matches the input signal, and check the display for the input signal (the display at the
place with a mark).
• If it is displayed normally, go to the troubleshooting code on the right of the judgement table
(H-쎻쎻).
• If the input signal is not displayed on the monitor panel, go to the troubleshooting code at the
bottom of the judgement table (F-쎻쎻).
Procedure: check if the service code is being displayed on the monitor panel.
[Judgement]
1) If a service code is being displayed on the monitor panel…go to troubleshooting [E2: ] for the governor,
pump controller (pump controller system).
2) If no service code is displayed on the monitor panel, and the upper structure does not swing:
20-87
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
20-88
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
<Example>
(1) M-9 When starting switch is turned ON (engine stopped), check item for previous trouble-
shooting flashes
(4) ★ Before carrying out troubleshooting, check that all the related connectors are properly in-
serted.
★ Always connect any disconnected connectors before going on the next step.
★ Check that the coolant is at the specifies level before carrying out troubleshooting.
(3)
Cause Remedy
1
Does display go out 4 YES Defective governor, pump Replace
when short connec-
tor is connected to
controller
Is bit (3) of
P08 (female)? YES
monitoring code 24
3
lighted up?
• Disconnect P08. Is continuity between
• Turn starting switch YES C16 (female) (8) and Defective monitor panel Replace
ON. • Turn starting switch NO
chassis as shown in
ON.
2 table? Defective contact, or
• Set to monitoring
code 24. disconnection in wiring Repair or
Is there continuity • Turn starting switch
OFF. harness between C16 replace
between P08 (female) NO
NO (2) and chassis? • disconnect C16, P08. (female) (8) -P08
• Connect 씯씮 disconnect (female) (1)
short connector to P08
• Turn starting switch (female).
OFF. Defective contact, or
• Disconnect P08. NO disconnection in wiring Repair or
harness between P08 replace
(female) (2) - chassis ground
Table
20-89
TROUBLESHOOTING DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
The procedure for carrying out check items No. 3 and 4 in the flow chart below is given on the following pages.
1
E2 쎻쎻 group: Troubleshooting for governor,
Carry out troubleshooting in applicable mode (Note: For
Is user code
displayed on monitor
YES pump controller (pump control system) (C mode)
E3 쎻쎻 group: Troubleshooting for governor,
pump controller (governor control system)
} E218, carry out troubleshooting of the communication ab-
normality system (N mode.)
panel? Carry out
(E mode) troubleshoot-
ing for engi-
6 YES ne (S mode)
Carry out
Is engine electrical troubleshoot-
Engine system system for which
ing for eng-
ine electrical
2 5 there is no failure system (E
code display normal? mode).
Is problem in engine (use flow
Is service code YES system of hydraulic chart for
displayed on monitor • Go to flow chart for NO items where
(mechanical)
NO panel? section where there is there is no
system? no abnormality display display) (E11
on judgment table. - E15)
4 • After adjusting oil
• Operate and check Carry out trouble-
pressure, judge from Hydraulic
service code. Are governor, pump
engine speed. (mechani- shooting for hydraulic
YES controller input and cal) system (mechanical) system
• Is all work equipment
output signals (H mode)
slow and does
normal?
engine speed drop
• Check using under heavy load?
3 monitoring code.
• Governor controller:
Carry out troubleshooting for
30,31,33,34 NO input signal system (F mode).
NO Are monitor codes • Pump controller:
02, 03, 08 normal? 10 - 24
• Valve controller:
50 - 69
• Check connection Carry out troubleshooting
condition of S-NET in NO for communication
monitoring codes abnormality system
02,03,08. (N comde).
★ For details, see governor, pump controller (governor control system) (pump control system) in the JUDGE-
MENT TABLE.
20-90
TROUBLESHOOTING DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
If there is no abnormality display in the communications system transmitted in S-NET, it can be taken that the
output signal from the monitor panel has been transmitted. However, even if there is no abnormality display, if the
operation is defective, use the following procedure when checking directly. If any abnormality occurs in the S-
NET system, the system is automatically switched to the following default mode, so be careful when carrying out
troubleshooting.
Default Mode when communications cannot be carried out for the monitor and governor, pump controller
2. Checking working mode signal (check No. 2 throttle signal monitoring code 16) at the same time)
1) Set to the monitoring mode and display monitoring code 10.
2) Switch the working mode as shown in Table 1 and check that the engine speed changes.
Table 1
1 Swing Lock ON
20-91
TROUBLESHOOTING DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
20-92
TROUBLESHOOTING DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
20-93
TROUBLESHOOTING DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
20-94
TROUBLESHOOTING SERVICE CODE TABLE
20-95
MEMO
TROUBLESHOOTING
20-96
TROUBLESHOOTING
TROUBLESHOOTING OF COMMUNICATION
ABNORMALITY SYSTEM
(N MODE)
20-97
TROUBLESHOOTING N-1
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the connector
and inserting the T-adapter, or when removing the T-adapter and returning the connector to its original
position, if the service code E is not displayed, the problem has been removed.
★ If the starting switch was turned off after the abnormality occurred, turn the starting switch on and check that
the service code displays E. (If it is not displayed, the problem has been removed.)
★ Before carrying out troubleshooting, check that all the related
connectors are properly inserted. Cause Remedy
★ Always connect any disconnected connectors before going on
the next step.
YES
Has been reset Replace
1
4 YES
Is monitoring code Defective monitor panel Repair
02,03 display normal? Is resistance between
YES P01 (4) (1!) and chas-
3 sis or P01 (4) (11)
and P01 (14) normal? Disconnection is between
• Disconnect C17
• Turn starting switch
When C17 is discon- P01(4) (11) and P01 (14) or Replace
YES nected, do bits (1) • Disconnect connector NO
On. C17, P01, and install chassis
and (2) light up in
• See Table 1. T-adapter to P01.
2 monitoring code 08?
• Min. 1⏲
• Disconnect Defective governor, pump Replace
Do bitts (1) and (2)
light up in monitoring connector C17. NO controller
NO code 08? • Turn starting switch
ON.
• See Table 2. YES Defective governor, pump Replace
• Turn starting switch 5
ON. controller
Is voltage between
C17 (4) (12) and
NO chassis normal? 6 YES
Defevtive monitor panel Replace
Is resistance between
• Turn starting P01(4), (11) and C17
switch ON. NO (4), (12) normal?
• Min. 7.5 V Disconnection in wiring
• Disconnect C17 harnees between P01(4), Replace
• Disconnect P01, NO
and measure (11) and C17 (4), (12)
voltage at C17.
harnees end. • Max. 1⏲
Table 1
Table 2
Display
Monitoring code
• Light up when connected • Note: Checks can be carried out with code 08 only
(1) Governor, pump controller when there is a disconnection. The display does not
(2) Governor, pump controller change when there is a short circuit.
Therefore, checks when there is a short circuit
should be carried out basically using Table 1
20-98
TROUBLESHOOTING N-1
20-99
TROUBLESHOOTING
TROUBLESHOOTING OF GOVERNOR,
PUMP CONTROLLER
(GOVERNOR CONTROL SYSTEM)
(E MODE)
Points to remember when carrying out troubleshooting of governor, pump controller system ................. 20-101
Action taken by controller and condition of machine when abnormality occurs ....................................... 20-102
Judgement table for governor, pump controller (governor control system)
and engine related parts .......................................................................................................................... 20-106
Electrical circuit diagram of governor, pump controller (governor control system) ................................... 20-108
E- 1 Abnormality in governor, pump controller power sosurce (controller LED is OFF) ............. 20-110
E-2 [E308] Abnormality in fuel control dial input value is displayed.... ...................................... 20-111
E-3 [E317] Abnormality (disconnection) in governor motor drive system is displayed.... .......... 20-112
E-4 [E318] Abnormality (short circuit) in governor motor drive system is displayed.... ............. 20-113
E-5 [E306] Abnormality in feedback potentiometer system is displayed.... ............................... 20-114
E-6 [E315] Abnormality (short circuit) in battery relay output system is displayed.... ................ 20-115
E-7 [E316] Abnormality (step-out) in motor is displayed.... ....................................................... 20-116
E-8 Engine does not start.... ...................................................................................................... 20-118
E-9 Engine speed is irregular.... ................................................................................................ 20-120
a) Idling speed is irregular................................................................................................ 20-120
b) There is hunting.... ....................................................................................................... 20-122
E-10 Lack of output (engine high idling speed is to low).... ......................................................... 20-124
E-11 Engine does not stop.... ...................................................................................................... 20-126
E-12 Defective operation of battery relay system (engine does not stop).... ............................... 20-128
20-100
POINTS TO REMEMBER WHEN CARRYING OUT TROUBLESHOOTING OF
TROUBLESHOOTING GOVERNOR, PUMP CONTROLLER SYSTEM
YES 2
If linkage between YES
governor motor and
Defective adjustment of governor motor
1 injection pump is likage See TESTING AND ADJUSTING.
disconnected, does
If linkage between
operation of governor
governor motor and
injection pump is dis-
motor become Go to troubleshooting E-9 - E-12 of elec-
normal?
connected and pump NO trical system
lever is operated by • With starting switch
hand or is fixed with at ON, operate fuel
control dial and wor-
wire, does condition
king mode switch.
Go to troubleshooting S-1 - S-16 of en-
return to normal?
NO
gine system
• If engine does not
stop, push governor
lever to STOP
position and check if
engine stops.
Disconnect the linkage as explained above, or check the adjustment and go to the troubleshooting flow
chart for the mechanidal system or electrical system. For details of the procedure for adjusting the linkage,
see TESTING AND ADJUSTING.
20-101
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PRO-BLEMS ON MACHINE
20-102
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when Problem that appears on machine
(voltage, current, resistance) abnormality is detected when there is abnormality
C03 Resistance
E06 (male)
(female) value
(7) - (4) (1) - (2) 0.25 - 7 k ⏲ 1. Does not become partial speed
(4) - (17) (2) - (3) 0.25 - 7 k ⏲ when set at MAX position
(7) - (17) - 2 - 3k⏲ Maintains engine speed at 2. Does not reach high idling when
- (1) - (3) 4 - 6k⏲ position of fuel control dial set at partial speed
Between immediately before abnor- 3. There are cases of hunting
each pin - Min. 1 M⏲ mality occurred 4. Lacks output (max. speed of en-
and chassis gine is too low)
C02 Resistance
E05 (male)
(female) value
(1) - (2) (2) - (3) 0.25 - 7k⏲ 1. If during operation
(3) - (4) (4) - (5) 0.25 - 7k⏲ 1) Set to low idling
2) Engine does not stop
(1) - (3) (2) - (4) Min. 1 M⏲
3) There are cases of hunting
(1) - (4) (2) - (5) Min. 1 M⏲ Sets motor drive current to 0 2. When stopped
Between Between 1) Engine starts, but stays at
pins (1), (2), pins (2), (3), low idling
Min. 1 M⏲
(3), (4) and (4), and (5)
2) Engine does not stop after
chassis and chassis
starting
3) There are cases of hunting
Motor drive current: Hold: 0.7 A
Start: 0.84 A
20-103
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Abnormality (short circuit) If excess current flows between C03 (1) and battery relay
- E315 in battery relay output ★ This occurs only when turning starting switch to OFF and
system stopping engine
20-104
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when Problem that appears on machine
(voltage, current, resistance) abnormality is detected when there is abnormality
20-105
JUDGEMENT TABLE FOR GOVERNOR, PUMP GOVERNOR
TROUBLESHOOTING (GOVERNOR CONTROL SYSTEM) AAND ENGINE RELATED PARTS
Self-diagnostic display
Troubleshooting code when service code is displayed E-1 E-2 E-3 E-4 E-5 E-6 E-7
20-106
JUDGEMENT TABLE FOR GOVERNOR, PUMP GOVERNOR
TROUBLESHOOTING (GOVERNOR CONTROL SYSTEM) AAND ENGINE RELATED PARTS
Machine
Checking monitoring,
monitor
check items
check item
102°C or above
105°C or above
Monitoring code
35 16 30 31 33 34 41 108
S-1
쎻 S-2
쎻 S-3
S-4
E-9A), S-5
E-9A), S-5
쎻 E-10, S-6
E-3. E-4
쎻 E-11
쎻 쎻 E-3 . E-4
S-7
S-8
S-9
S-10
S-11
S-12
S-13
쎻쎻 S-14
S-15
S-16
E-3 . E-4
- - - - - - - - - -
E-12 - - - - - M-14 M-13 M-13 E-8
20-107
TROUBLESHOOTING
20-108
TROUBLESHOOTING
20-109
TROUBLESHOOTING E-1
Cause Remedy
20-110
TROUBLESHOOTING E-2
★ If E306 also occurs at the same time, check the wiring harness below.
• Wiring harness between C03 (female) (7) - E04 (female) (1) short circuiting with groud, or contact with
other wiring harness
Table 1
Resistance
C03 (female) E04 (male)
value
(7) - (4) (1) - (2) 0.25 - 7k⏲
(4) - (17) (2) - (3) 0.25 - 7k⏲
(7) - (17) - 2 - 3k⏲
- (1) - (3) 4 - 6k⏲
Between each
- Min. 1 M⏲
pin and chassis
20-111
TROUBLESHOOTING E-3
Table 1
Resistance
E05 (male) C02 (female)
value
(1) - (2) (2) - (3) 2.5 - 7.5 k⏲
(3) - (4) (4) - (5) 2.5 - 7.5 k⏲
20-112
TROUBLESHOOTING E-4
Cause Remedy
Table 1
Resistance
E05 (male) C02 (female)
value
91) - (2) (2) - (3) 2.5 - 7.5 k⏲
(3) - (4) (4) - (5) 2.5 - 7.5 k⏲
(1) - (3) (2) - (4) Min. 1 M⏲
(1) - (4) (2) - (5) Min. 1 M⏲
Between Between
chassis and chassis and
Min. 1 M⏲
pins (1) (2) (3) pins (2) (3) (4)
(4) (5)
20-113
TROUBLESHOOTING E-5
Cause Remedy
Is resistance
Table 1? Defective wiring harness in
between E06 (male) • Turn starting switch NO system with defective Replace
(1)-(2), (2)-(3) as OFF. resistance
shown in Table 1? • Disconnecting C03.
★ If E308 also occurs at the same time, check the wiring harness below.
• Wiring harness between C03 (female) (7) - x07 (6) - E06 (female) (1) short circuiting with ground, or
contact with other wiring harness
Table 1
Resistance
C03 (female) E04 (male)
value
(7) - (4) (1) - (2) 0.25 - 7k⏲
(14) - (17) (2) - (3) 0.25 - 7k⏲
(7) - (17) - 2 - 3k⏲
- (1) - (3) 4 - 6k⏲
Between each
- Min. 1 M⏲
pin and chassis
20-114
TROUBLESHOOTING E-6
Cause Remedy
20-115
TROUBLESHOOTING E-7
Cause Remedy
1
YES Defective governor, pump Replace
3 controller
Are E306, E317, and
Operate fuel control
E318 displayed?
YES dial 0 MAX and turn
starting switch OFF. 4 YES 1) Defective linkage Adjust or
Is operation normal? 2) Defective injection pump
• Turn starting switch Is there any scuffing
replace
2
ON. when spring rod is
• Turn starting switch
ON. moved to injection
NO
Is adjustment of • Turn auto decelera- pump end?
NO linkage normal? tion OFF. Defective governor motor Replace
• Disconnect E05 NO
• Disconnect linkage at
• Turn starting switch governor motor end.
ON.
• Turn Defective governor linkage
NO Adjust (For
autodeceleration
OFF. details, see
• Set to governor TESTING
motor adjustment AND
mode. ADJUSTING)
• See TESTING AND
ADJUSTING.
20-116
TROUBLESHOOTING MEMO
20-117
TROUBLESHOOTING E-8
YES
6
Is voltage between
starting switch
terminal c and
NO chassis normal?
YES
10
Is there continuity
YES between starting
switch terminal B and
2
9 BR?
When starting switch
is turned ON, is shut- • Turn starting switch
YES Is voltage of starting ON.
off valve linkage
switch terminal B • Remove terminal B. NO
worked? NO normal?
• Turn starting switch
• Connect (-) end of
ON
tester to battery
teminal (-).
• 20 - 29V NO
1 14
YES
Is voltage and Is voltage between
specific gravity of YES shut-off valve E09 (B)
battery normal? 13 and chassis normal?
Is voltage betwen
shut-off valve
• Min. 24v
connector E09 (A)
• Turn starting switch NO
• Specific gravity: Min. NO to start
and chassis normal?
1.26 • Approx 24V
NO
E-8 Related electric circuit diagram
20-118
TROUBLESHOOTING E-8
Cause Remedy
20-119
TROUBLESHOOTING E-9
2 4 YES
When linkage be-
YES Is E218 tween governor motor
and pump is adjus-
displayed? ted, does condition
become normal?
NO
Table 1
20-120
TROUBLESHOOTING E-9
Cause Remedy
See N mode
See E-5 -
See E-2 -
See C-14 -
20-121
TROUBLESHOOTING E-9
b) There is hunting
YES
2 4 YES
When linkage be-
YES Is E218 tween governor motor
and pump is adjus-
displayed? ted, does condition
become normal?
• At MIN
: 4.0 - 4.75V NO
• At MAX
: 0.25 - 1.0V
NO
Table 1
20-122
TROUBLESHOOTING E-9
Cause Remedy
See N mode
See E-5 -
See E-2 -
See C-14 -
20-123
TROUBLESHOOTING E-10
YES
2 YES
YES Is E218
displayed?
NO
Table 1
20-124
TROUBLESHOOTING E-10
Cause Remedy
See N mode -
See E-5 -
See E-2 -
Defective adjustment of -
governor motor linkage
See C-14 -
20-125
TROUBLESHOOTING E-11
YES
Does governor
YES lever contact STOP YES
stopper, and does
engine stop?
3
Turn starting switch
ON씮OFF. Potentiometer 6 YES
• When linkage is
adjusted, does When starting switch
condition become YES is OFF, is voltage
normal? Relay drive signal 5 between C03 (14)
NO
• Does loose spring and (17) normal?
1 When starting switch
move freely? YES is OFF, does voltage
between C01 (1) and • When engine is NO
Is controller model stopped
code as shown in • See TESTING AND Starting motor signal 4 (6) (12) change as
ADJUSTING. shown in Table 2? • 2.9 - 3.3V
Table 1?
When stating switch
• 20 - 30V
is OFF, is voltage
between C03 (8) and NO
• Turn starting switch NO
chassis normal?
ON.
• Set to monitoring
• Max.1V
code 03 or 02.
NO
NO
Table 1
Note 1: When the starting switch is ON, the controller end is OFF, but a voltage of approx. 20 - 30V is always
flowing from starting switch BR, so if the voltage is measured at C01 (1), there is a voltage of 20 -30V
20-126
TROUBLESHOOTING E-11
Cause Remedy
-
See E-5
Replace
Defective governor, pump
controller
Contact with 24V wiring
harness of wiring harness
between starting switch Replace
ACC-X07 (17)- C03 (female)
(8), or defective starting
switch
-
See C-14
20-127
TROUBLESHOOTING E-12
E-12 Defective operation of battery relay system (engine does not stop)
★ This only occurs when the engine is stopped and the starting switch is turned OFF.
Check with the engine stopped (push the fuel control lever of the fuel injection pump to the NO INJECTION
position).
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
See E-6 -
1
Table 1
Note 1: When the starting switch is ON, the controller end is OFF, but a voltage of approx. 20 - 30V is always
from starting switch BR, so if the voltage is measured at C01 (1), there is a voltage of 20 - 30V.
20-128
TROUBLESHOOTING
TROUBLESHOOTING OF
ENGINE SYSTEM (S MODE)
20-129
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
[Questions]
Sections 훽 + 훾 in the chart on the right corresponds
to the items where answers can be obtained from the
user. The items in 훾 are items that can be obtained
from the user, depending on the user's level.
[Check items]
The serviceman carries out simple inspection to nar-
row down the causes. The items under 훿 in the chart
on the right correspond to this.
The serviceman narrows down the causes from infor-
mation 훽 that he has obtained from the user and the
results of 훿 that he has obtained from his own inspec-
tion.
[Troubleshooting]
Troubleshooting is carried out in the order of probabil-
ity, starting with the causes that have been marked as
having the highest probability from information gained
from [Questions] and [Check items].
20-130
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
20-131
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
20-132
TROUBLESHOOTING METHOD OF USING TROUBLESHOOTING CHARTS
20-133
TROUBLESHOOTING S-1
Charging
rate
100% 90% 80% 75% 70%
Ambient
temperature
20°C 1.28 1.26 1.24 1.23 1.22
0°C 1.29 1.27 1.25 1.24 1.23
-10°C 1.30 1.28 1.26 1.25 1.24
• The specific gravity should exceed the value for the charging rate of
70% in the above table.
• In cold areas the specific gravety must exceed the value for the
charging rate of 75% in the above table.
20-134
TROUBLESHOOTING S-2
20-135
TROUBLESHOOTING S-2
★ check that the monitor panel does not display any ab-
normality in the governor control system.
General causes why engine turns but no exhaust smoke
comes out.
• Supply of fuel impossible
• Supply of fuel is extremely small
• Improper selection of fuel (particulary in winter)
Ambient temperature
Type of fuel -22 -4 14 32 50 68 86 104°F
-30 -20 -10 0 10 20 30 40°C
20-136
TROUBLESHOOTING S-2
20-137
TROUBLESHOOTING S-3
20-138
TROUBLESHOOTING S-4
20-139
TROUBLESHOOTING S-5
20-140
TROUBLESHOOTING S-6
20-141
TROUBLESHOOTING S-7
20-142
TROUBLESHOOTING S-8
20-143
TROUBLESHOOTING S-9
20-144
TROUBLESHOOTING S-10
20-145
TROUBLESHOOTING S-11
20-146
TROUBLESHOOTING S-12
Ambient temperature
Type of fuel -22 -4 14 32 50 68 86 104°F
-30 -20 -10 0 10 20 30 40°C
SAE 30
SAE 10W
Diesel fuel
SAE 10W-30
SAE 15W-40
20-147
TROUBLESHOOTING S-13
20-148
TROUBLESHOOTING S-14
20-149
TROUBLESHOOTING S-15
20-150
TROUBLESHOOTING S-16
20-151
TROUBLESHOOTING
TROUBLESHOOTING OF GOVERNOR,
PUMP CONTROLLER
(PUMP CONTROL SYSTEM) (C MODE)
Points to remember when carrying out troubleshooting of pump controller system ................................ 20-153
Action taken by controller and condition of machine when abnormality occurs ...................................... 20-154
Judgement table for governor, pump controller and hydraulic related parts.. ......................................... 20-160
Electrical circuit diagram of C mode systems ......................................................................................... 20-162
C- 1 Abnormality in controller power source (controller LED is OFF) ............................................... 20-164
C- 2 [E232] Short circuit in pump TVC solenoid system is displayed ............................................... 20-165
C- 3 [E233] Disconnection pump TVC solenoid system is displayed ............................................... 20-167
C- 8 [E203] Short circuit in swing holding brake solenoid system is displayed ................................. 20-169
C- 9 [E213] Disconnection in swing holding brake solenoid system is displayed ............................. 20-171
C-10 [E205] Short circuit in 2-stage relief solenoid system is displayed ........................................... 20-173
C-11 [E215] Disconnection in 2-stage relief solenoid system is displayed ........................................ 20-174
C-12 [E206] Short circuit in travel speed solenoid system is displayed ............................................. 20-175
C-13 [E216] Disconnection in travel speed solenoid system is displayed ......................................... 20-176
C-14 [E217] Model selection input error is displayed ........................................................................ 20-177
C-15 [E222] Short circuit in LS-EPc solenoid system is displayed .................................................... 20-178
C-16 [E223] Disconnection in LS-EPc solenoid system is displayed ................................................ 20-179
C-17 [E224] Abnormality in pump pressure sensor system is displayed ........................................... 20-180
C-19 [E226] Abnormality in pressure sensor power source is displayed ........................................... 20-181
C-20 [E227] Abnormality in engine speed sensor system is displayed ............................................. 20-182
20-152
POINTS TO REMEMBER WHEN TROUBLESKOOTING PUMP
TROUBLESHOOTING CONTROLLER SYSTEM
20-153
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
1. Short circuit with ground, short circuit inside pump TVC solenoid
2. Short circuit with power source, short circuit with ground in wiring
harness between controller C02 (8) and TVC solenoid C13 (1) ((+)
E232 Short circuit in pump side)
TVC solenoid system 3. Short circuit with power source in wiring harness between control-
ler C02 (18) and TVC solenoid C13 (2) ((-) side)
4. Defective governor, pump controller
E02
1. Disconnection, defective contact inside pump TVC solenoid
2. Disconnection, defective contact in wiring harness between con-
troller C02 (8) and TVC solenoid C13 (1) ((+) side)
Disconnection in 3. Disconnection, defective contact, short circuit with ground in wiring
E233 pump TVC solenoid harness between controllerC02 (18) and TVC solenoidC13 (2) ((-)
sytem side)
4. Defective governor, pump controller
1. Short circuit with ground, short circuit inside swing holding brake
solenoid
Short circuit in swing 2. Short circuit with ground in wiring harness between controller C01
E203 holding brake sole- (3) and solenoid V04 (2) ((+) side)
noid system 3. Defective governor, pump controller
E03
1. Disconnection, defective contact inside swing holding brake sole-
noid
Disconnection in 2. Disconnection, defective contact, short circuit with power source in
E213 swing holding brake wiring harness between controller C01 (3) and solenoid V04 (2)
solenoid system ((+) side)
3. Disconnection, defective contact in wiring harness between sole-
noid V04 (1) and chassis ground ((-) side)
4. Defective governor, pump controller
20-154
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when abnormality Problem that appears on machine
(voltage, current, resistance) is detected when there is abnormality
1. The current stops flowing to the TVC 1. In the case of 1, it is the same
solenoid, so no particular action is as E232.
• Resistance of solenoid: taken. 2. In the case of 2, the current
10 - 22⏲ 2. If there is a short circuit with the (min. 1A) continues to flow to
• Current: 1000 mA (H/O ground at the (-) end, the current (min. the pump TVC solenoid, so the
mode, auto-deceleration 1A) continues to flow to the TVC sole- output of the pump TVC valve
ON, levers at neutral, fuel noid. increases and the overall
control dial at MAX.) 3. It displayes user code E02 on the speed becomes slower.
monitor panel.
★ If the abnormality is restored by the
vibration of the machine, it resets the
power source to restore to the proper
condition. (However, the service code
display does not go out.)
20-155
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Short circuit in LS 1. Short circuit with ground, short circuit inside LS bypass solenoid
- E201 bypass solenoid 2. Short circuit with ground in wiring harness between controller c01
system (2) and solenoid V05 (2) ((+) side)
3. Defective governor , pump controller
Short circuit in 2- 1. Short circuit with ground, short circuit inside 2-stage relief solenoid
stage relief solenoid 2. Short circuit with ground in wiring harness between controller c01
- E205 system (10) and solenoid V05 (2) ((+) side)
3. Defective governor, pump controller
1. Short circuit with ground, short circuit inside travel speed solenoid
Short circuit in travel 2. Short circuit with ground in wiring harness between controller C01
- E206 speed solenoid (9) and solenoid V06 (2) ((+) side)
system 3. Defective governor, pump controller
E217 Model selection input 1. Disconnection, defective contact, short circuit with ground in model
- error selection wiring harness C17 (5) (6) (7) (13) (14)
2. Defective governor, pump controller
20-156
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when abnormality Problem that appears on machine
(voltage, current, resistance) is detected when there is abnormality
1. The current stops flowing to the sole- Same content as display for E201
noid, so no particular action is taken.
★ If the abnormality is restored by the
• Resistance of solenoid: vibration of the machine, it resets the
20 - 60⏲ power source to restore to the proper
condition. (However, the service code
display does not go out.)
1. The current stops flowing to the sole- Same content as display for E205
noid, so no particular action is taken.
• Resistance of solenoid: ★ If the abnormality is restored by the
20 - 60 ⏲ vibration of the machine, it resets the
power source to restore to the proper
condition. (However, the service code
display does not go out.)
1. The current stops flowing to the sole- Same content as display for E206
noid, so no particular action is taken.
• Resistance of solenoid: ★ If the abnormality is restored by the
20 - 60 ⏲ vibration of the machine, it resets the
power source to restore to the proper
condition. (However, the service code
display does not go out.)
• Between C17 (13) and chas- Detect abnormality in input 1. Engine stalls, or
sis: Max. 1 ⏲ 1) Retains data when starting switch is 2. Work equipment, swing, travel
Between C17 (5), (7), (14) ON speeds are all slow, and there is
(6) and chassis: Min. 1 MX no power
20-157
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Abnormality in 1. Short circuit, short circuit with ground inside pump pressure sensor
- E226 pressure sensor 2. Short circuit, short circuit with ground in wiring harness between
power source system controller C03 (6) and fron pressure sensor C08 (2)
3. Defective governor, pump controller
20-158
ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when abnormality Problem that appears on machine
(voltage, current, resistance) is detected when there is abnormality
1. The current stops flowing to the LS-EPC 1. In the case of 1, it is the same as
solenoid, so no particular action is taken. E222
2. If there is a short circuit with the ground at 2. In the case of 2, electric current
• Current: Approx. 705 mA (Le- the (-) end, the current (min. 1A) conti- (min. 1A) continues to flow to the
vers at neutral, low idling) nues to flow to the LS-EPC solenoid. LS-EPC solenoid, so the work
★ If the abnormality is restored by the vibra- equipment, travel, and swing
tion of the machine, it resets the power speeds are slow
source to restore to the proper condition.
(However, the service code display does
not go out.)
• Between C03 (3) and (16): 0.5 - 1. Takes pump pressure as O MPa (0 kg/ 1. The travel speed does not auto-
4.5 V cm2)when actuating. matically shift (it does not change
• Between C03 (6) and (16): 18 - * If the abnormality is restored by the vibra- from Hi to Lo).
28 V tion of the machine, it resets the power ★ If the button is operated
• Between C03 (female) (3) and source to restore to the proper condition. manually, the panel display is
(16), (3) and chassis (However, the service code display does switched.
• Resistance: Min. 1 M⏲ (Discon- not go out.)
nect connectors C03 and C08.)
1. Takes front pump and rear pump pressure 1. The travel speed dos not auto-
as O MPa (0 kg/cm2) when actuating. matically shift (it does not change
• Voltage between C03 (6) and 2. When abnormality is detected, it switches form Hi to Lo).
(16): 18 - 28 V the output OFF, and when all levers are ★ If the button is operated
returned to neutral, it outputs again. manually, the panel display is
★ This automatic resetting is repeated up to switched.
3 times.
• Resistance: 500 - 1000 ⏲ 1. It functions in the equivalent of the G/O It operated about the same as G/O
• Voltage (AC range) : 0.5 - 3.0 V mode (the speed rises) mode (prolix) (the power is slightly
(engine started) lower)
20-159
JUDGEMENT TABLE FOR GOVERNOR, PUMP CONTROLLER
TROUBLESHOOTING (PUMP CONTROL SYSTEM) AND HYDRAULIC RELATED PARTS
Service code OFF 232 233 201 211 203 213 205 215 206 216 217 222 223
All work equipment
Speeds of all work equipment, swing, travel are slow or lack power 쐌 쐌 쐌 쐌 쐌
travel, swing
In L/O, F/O modes, work equipment speed is faster than specified speed 쐌 쐌
쐌 쐌
system operations
Troubleshooting code when service code is displayed C-1 C-2 C-3 C-6 C-7 C-8 C-9 C-10 C-11 C-12 C-13 C-14 C-15 C-16
20-160
JUDGEMENT TABLE FOR GOVERNOR, PUMP CONTROLLER
TROUBLESHOOTING (PUMP CONTROL SYSTEM) AND HYDRAULIC RELATED PARTS
★ If service code E218 (abnormality in network system) is displayed, go to troubleshooting for N mode.
Governor, pump
controller (E2:XX Check items in monitoring mode
system)
Self-diagnostic display
code is displayed
Kerosene mode
Boom LOWER
Bucket DUMP
Bucket CURL
Boom RAISE
2-stage relief
Travel speed
Knob switch
Model code
Arm OUT
Arm IN
Swing
Travel
쐌 왌 H-1
H-2
H-3
H-4
왌 왌 왌 왌 왌 왌 왌 왌 H-5
H-6
왌 왌 H-7
왌 왌 H-8
왌 왌 H-9
H-10
H-11
왌 왌 왌 H-12
H-13
H-14
왌 왌 왌 왌 왌 H-15 C-21
H-16
H-17
H-18
H-19
왌 H-21
쐌 쐌 왌 H-23
왌 왌
H-25
H-26
H-27
H-28
H-29
H-30
H-31
C-17 C-19 C-20 - - - - - - - - - - - - - - - - - -
- - - F-1 F-2 F-3 F-4 F-5 F-6 F-7 F-8 F-9 F-10 F-11 - - - - - - - -
20-161
TROUBLESHOOTING
20-162
TROUBLESHOOTING
20-163
TROUBLESHOOTING C-1
Cause Remedy
YES
1 Defective governor, pump controller Replace
Is voltage between
C01 (7) (13) and c02 Defective contact or disconnection in Repair or
(11) (21) normal? 2 YES wiring harness between fuse 1 and replace
C01 (female) (7) (13)
Is voltage between
• Turn starting switch
fuse 1 and chassis
ON. NO normal?
• 20 - 30 V Defective contact, or disconnection in Repair or
wiring harness between fuse 1 - H15 replace
• Turn starting switch NO (2) - M14 (2) (1) - battery relay M
ON.
• 20 - 30V
20-164
TROUBLESHOOTING C-2
Cause Remedy
Table 1
Between C13 (male) (1) - (2) Between C02 (female) (8) - (18) Between C05 (female) (3) - (4) 10 - 22 ⏲
Between C13 (male) (1) - chassis Between C02 (female) (8) - chassis Between C05 (female) (3) - chassis Min. 1 M⏲
Table 2
20-165
TROUBLESHOOTING C-2
20-166
TROUBLESHOOTING C-3
Cause Remedy
3 YES
Defective governor, pump controller Replace
Is resistance
YES between c02
(female) (8) and (18),
2
(18) and chassis as
Is resistance shown in Table 1?
between C13 (male)
• Turn starting switch NO
Go to A
(1) and (2), (2) and OFF.
chassis as shown in • Disconnect c02.
Table 1?
• Turn starting switch
OFF.
NO
• Disconnect C13.
Table 1
Between C13 (male) (1) - (2) Between C02 (female) (8) - (18) Between C05 (female) (3) - (4) 10 - 22 ⏲
Between C13 (male) (2) - chassis Between C02 (female) (18) - chassis Between C05 (female) (4) - chassis Min. 1 M⏲
Table 2
20-167
TROUBLESHOOTING C-3
20-168
TROUBLESHOOTING C-8
Cause Remedy
3 YES
Defective governor, pump controller Replace
Is resistance
YES between C01
2 (female) (3) and
chassis normal?
Is resistance
YES between V04 (male) • Turn starting switch
Go to A
NO
(1) and (2), (2) and OFF.
1 chassis normal? • Disconnect C01.
• Turn swing lock switch
Interchange OFF.
• Turn starting switch
connector with other • 20 - 60 ⏲
solenoid. Is [E203] OFF.
displayed? • Disconnect V04. NO
Table 1
20-169
TROUBLESHOOTING C-8
20-170
TROUBLESHOOTING C-9
Cause Remedy
3 YES
Go to A
Is voltage between
YES C01 (male) (3) and
2 chassis as shown in
Table 1?
Defective governor, pump controller Replace
Is resistance
YES • Turn starting switch NO
between V04 (male)
ON.
1 (1) and (2) normal?
• Disconnect C01.
Table 1
Between C01 (male) Between X05 (male) Between V04 (male) 0 - 3V 5 seconds after all levers are returned to neutral
(3) - chassis (3) - chassis (2) - chassis 20 - 30V Swing lever operated
20-171
TROUBLESHOOTING C-9
20-172
TROUBLESHOOTING C-10
Cause Remedy
3 YES
Defective governor, pump controller Replace
Is resistance
YES between C01
2 (female) (10) and
chassis normal? Short circuit with chassis ground in Repair or
Is resistance wiring harness between C01 (female x replace
YES between V25 (male) • Turn starting switch NO 10) and V25 (female) (2)
(1) and (2), (2) and OFF.
1 chassis as shown in • Disconnect C01.
Table 1? • 20 - 60 ⏲
Interchange • Turn starting switch
connector with other OFF.
solenoid. Is [E205] • Disconnect V25 NO
displayed?
Table 1
Between V25 (male) (1) - (2) 20 - 60 ⏲
Between v25 (male) (2) - chassis Min. 1 M⏲
20-173
TROUBLESHOOTING C-11
Cause Remedy
4 YES
Defective contact or disconnection in Repair or
Is voltage between wiring harness between V25 (female) replace
YES V25 (female) (2) and (1) and chassis ground
chassis as shown in
Short circuit with power source,
3 Table 1?
defective contact, or disconnection in Repair or
• Turn starting switch NO wiring harness between C01 (female) replace
Is voltage between (10) -V25 (female) (2)
ON.
YES C01 (male) (10) and
• Disconnect V25
2 chassis as shown in
Table 1?
Is resistance Defective governor, pump controller Replace
YES between V25 (male) • Turn starting switch NO
ON.
1 (1) and (2) normal?
• Disconnect C01.
Table 1
Troubleshooting No. 3 Troubleshooting No. 4 Voltage Measurement condition
Between C01 (male) (10) - Between V25 (female) (2) - 0 - 3V All levers at neutral
chassis chassis 20 - 30V Travel operated independently
20-174
TROUBLESHOOTING C-12
Cause Remedy
3 YES
Defective governor, pump controller Replace
Is resistance
YES between C01
2 (female) (9) and
chassis normal? Short circuit with chassis ground in Repair or
Is resistance wiring harness between C01 (female) replace
YES between V04 (male) • Turn starting switch NO (8) and V04 (female) (2)
(1) and (2), (2) and OFF.
1 chassis as shown in • Disconnect C01.
Table 1? • 20 - 60 ⏲
Interchange • Turn starting switch
connector with other OFF.
solenoid. Is [E206] NO
• Disconnect V04
displayed?
Table 1
20-175
TROUBLESHOOTING C-13
Cause Remedy
4 YES
Defective contact or disconnection in Repair or
Is voltage between wiring harness between V06 (female) replace
YES V06 (female) (2) and (1) and chassis ground
chassis as shown in
Short circuit with power source,
3 Table 1?
defective contact, or disconnection in Repair or
• Turn starting switch NO wiring harness between C01 (female) replace
Is voltage between (9) - V06 (female) (2)
YES C01 (male) (9) and ON.
chassis as shown in • Disconnect V
2
Table 1?
Is resistance Defective governor, pump controller Replace
YES • Turn starting switch NO
between V06 (male)
(1) and (2) normal? ON.
1
• Disconnect C01.
Interchange
• Turn starting switch
connector with other
OFF. NO
solenoid. Is [E216]
• Disconnect V06.
displayed?
• 20 - 60 ⏲
• Turn starting switch Defective travel speed solenoid
OFF. (internal disconnection or short circuit Replace
• Interchange V06 with NO with power source)
other connector.
• Turn starting switch
ON.
Table 1
Troubleshooting No. 3 Troubleshooting No. 4 Voltage Measurement condition
0 - 3V Travel speed switch at Lo
Between C01 (male) (10) - Between V06 (female) (2) - Travel speed switch at Mi or Hi
chassis chassis 20 - 30V Operate the lever slightly not enough to move the
machine
20-176
TROUBLESHOOTING C-14
Cause Remedy
YES
1 Defective governor, pump controller Replace
Is monitoring mode
display as shown in
Table 1? 2 YES
Is voltage between
• Turn starting switch C17 (5) 96) (7) (13)
ON. NO (14) and chassis as
• Set to monitoring shown in Table 2: Defective model selection connector,
codes [02, 03 and or disconnection, short circuit with Repair or
[21,22]. • Turn starting switch NO ground, or short circuit in wiring replace
ON. harness where voltage is defective
20-177
TROUBLESHOOTING C-15
Cause Remedy
2 YES
Defective governor, pump controller Replace
Is resistance
YES between C02 Short circuit with ground or short
(female) (7) and (17), circuit with power source in wiring
1
(7) and chassis as harness between C02 (female) (7) - Repair or
Is resistance shown in Table 1? C10 (female) (1), or short circuit with replace
between C10 (male) • Turn starting switch power source in wiring harness
NO
(1) and (2), (1) and OFF. between C02 (female) (17) - C10
chassis as shown in • Disconnect C02. (female) (2)
Table 1?
• Turn starting switch Defective LS-EPC solenoid (internal
OFF. short circuit with ground or short Replace
NO circuit with power source)
• Disconnect C10.
Table 1
Troubleshooting No. 1 Troubleshooting No. 2 Resistance value
Between C10 (male) (1) - (2) Between C02 (female) (7) - (17) 7 - 14 ⏲
Between C10 (male) (1) - chassis Between C02 (female) (7) - chassis Min. 1 M⏲
20-178
TROUBLESHOOTING C-16
Cause Remedy
2 YES
Defective governor, pump controller Replace
Is resistance
YES between C02 Defect contact or short circuit with
(female) (7) and (17), chassis ground in wiring harness
1
(17) and chassis as between C02 (female) (7) and C10
Is resistance shown in Table 1? (female) (1), or defective contact, Repair or
between C10 (male) • Turn starting switch short circuit with ground, or replace
NO
(1) and (2), (2) and OFF. disconnection in wiring harness
chassis as shown in • Disconnect C02. between C02 (female) (17) - C10
Table 1? (female) (2)
• Turn starting switch
OFF. Defective LS-EPS solenoid (internal
NO disconnection, defective contact, or Replace
• Disconnect C10
short circuit with ground)
Table 1
Troubleshooting No. 1 Troubleshooting No. 2 Resistance value
Between C10 (male) (1) - (2) Between C02 (female) (7) - (17) 7 - 14 ⏲
Between C10 (male) (1) - chassis Between C02 (female) (7) - chassis Min. 1 M⏲
20-179
TROUBLESHOOTING C-17
Cause Remedy
2 YES
Defective governor, pump controller Replace
20-180
TROUBLESHOOTING C-19
Cause Remedy
2 YES
Defective front pump pressure sensor Replace
(internal short circuit or short circuit
Is voltage between
YES with ground)
C03 (6) and (16)
1 normal?
Is resistance
between C03 • Turn starting switch Defective governor, pump controller Replace
(female) (6) and (16), NO
ON.
(6) (16) and chassis • Disconnect C08.
normal? • 18 - 28 V
• Turn starting switch Short circuit or short circuit with Repair or
OFF. ground in wiring harness of system replace
• Disconnect C03, and NO where resistance value is defective
C08.
• Min. 1 M⏲
20-181
TROUBLESHOOTING C-20
Cause Remedy
2 YES
Defective govenror, pump controller Replace
Is resistance
YES between C16 Short circuit with ground, defective
1 (female) (1) and (2) contact, or disconnection in wiring
harness between C16 (female) (1) - Repair or
normal?
E08 (10) - E07 replace
Is resistance (female) (2), or between C16
• Turn starting switch NO
between E07 (male) (female) (2) - E08 (9) - E07
OFF.
(1) and (2) normal? (female) (1)
• Disconnect C16.
• 500 - 1000 ⏲
• Turn starting switch Defective engine speed sensor
OFF. (internal disconnection, defective Replace
NO contact, or short circuit with ground)
• Disconnect E07.
• 500 - 1000⏲
20-182
TROUBLESHOOTING
20-183
TROUBLESHOOTING
20-184
TROUBLESHOOTING
20-185
TROUBLESHOOTING F-1
F-1 Bit pattern 20-(1) Swing oil pressure switch does not
light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
Turn the swing lock switch ON before operating the swing lever.
★ If there is no display when the lever is operated on one side, the PPC shuttle valve is defective. (See H-5)
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact or disconnection in Repair or
Is voltage between 3 YES wiring harness between S08 (female) replace
C16 (5) and chassis Is resistance between (1) and chassis ground
normal? C16 (female) (5) and
YES S08 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with
• Swing lever at Is resitance between lated from chassis? ground, or disconnection in wiring Repair or
neutral : 20 - 30 V harness between C16 (female) (5) replace
S08 (male) (1) and • Turn starting switch
• Swing lever NO (2) normal,and is NO and S08 (female) (2)
OFF.
operated circuit insulated from • Disconnect C16 and S08.
: Max. 1V chassis? • Between C16 and S08: Max. 1 ⏲ Defective swing oil pressure switch (If
• Disconnect S08. • Between wiring harness and chassis: Min. 1 M⏲ the condition does not return to Replace
• Start engine. normal even when the switch is
NO
• Swing lever at replaced, go the H-5.
neutral: Min. 1 M⏲
• Swing lever
operated: Max. 1 ⏲
• See Note 1.
20-186
TROUBLESHOOTING F-2
F-2 Bit pattern 20-(2) Travel oil pressure switch does not
light up
★ This troubleshooting is carried out when there is still an abnormality, so when the connector and
inserting the T-adapter, or when removing the T-adapter and returning the connector to its original
position, if the monitor code display returns to normal, the problem has been removed.
Before operating the travel lever, check that the surrounding area is safe.
★ If there is no display when the travel lever is operated on one side, the PPC shuttle valve is defective. (See
H-5)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, or disconnection in Repair or
Is voltage between 3 YES wiring harness between S01 (female) replace
C16 (13) and chassis Is resistance between (1) and chassis ground
normal? C16 (female) (13) and
YES S01 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with
• Travel lever at neutral Is resistance lated form chassis? ground, or disconnection in wiring Repair or
: 20 -30 V harness between C16 (female) (13) replace
between S01 (male) • Turn starting switch
• Travel lever operated NO NO S01 (female) (2) and A27 (1) (2)
(1) and (2) normal, OFF.
: Max. 1 V and is circuit insu- • Disconnect C16 and S01.
lated from chassis? • Between C16 and S01: Max. 1 ⏲ Defective travel oil pressure switch (if
• Disconnect S01 • Between wiring harness and chassis: Min. 1 M ⏲ the condition does not return to Replace
• Start engine. normal even when the switch is
NO
• Travel lever at neutral replaced, go to H-5.)
: Min. 1M⏲
• Travel lever operated
: Max: 1 ⏲
• See Note 1.
20-187
TROUBLESHOOTING F-3
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, or disconnection in Repair or
Is voltage between 3 YES wiring harness between S04 (female) replace
C17 (10) and chassis Is resistance between (1) and chassis ground
normal? C17 (female) (10) and
YES S04 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with
• Boom lever at Is resistance lated from chassis? ground, or disconnection in wiring Repair or
neutral: 20 - 30 V harness between C17 (female) (10) - replace
between S04 (male) • Turn starting switch
• Boom lever operatedNO NO H13 (11) - S04 (female) (2)
(1) and (2) normal, OFF.
to LOWER: Max. 1V and is circuit insu- • Disconnect C17 and S04.
lated from chassis? • Between C17 and S04: Max. 1⏲ Defective boom LOWER oil pressure
• Disconnect S04. • Between wiring harness and chassis : Min. 1 M⏲ switch (if the conditiion does not Replace
• Start engine. return to normal even when the switch
NO
• Boom lever at is replaced, go to H-5.)
neutral: Min. 1 M⏲
• Boom lever operated
to LOWER: Max. 1 ⏲
• See Note 1.
20-188
TROUBLESHOOTING F-4
F-4 Bit pattern 20-(4) Boom RAISE oil pressure switch does
not light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
When measuring with the engine running, operate the lever slightly and make sure that the work equipment
does not move.
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, or disconnection in Repair or
Is voltage between 3 YES wiring harness between S02 (female) replace
C17 (2) and chassis Is resistance between (1) and chassis ground
normal? C17 (female) (2) and
YES S02 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with Repair or
• Boom lever at Is resistance lated from chassis? ground, or disconnection in wiring replace
neutral: 20 - 30V harness between C17 (female) (2) -
between S02 (male) • Turn starting switch
• Boom lever operated NO NO H13 (9) - S02 (female) (2)
(1) and (2) normal, OFF.
to RAISE : Max. 1 V and is circuit insu- • Disconnect C17 and S02.
lated from chassis? • Between C17 and S02: Max. 1 ⏲ Defective boom RAISE oil pressure Replace
• Disconnect S02. • Between wiring harness and chassis : Min. 1 M⏲ switch
• Start engine. (If the condition does not return to
NO
• Boom lever at normal even when the switch is
neutral: Min. 1 M⏲ replaced, go to H-5.)
• Boom lever operated
to RAISE : Max. 1 ⏲
• See Note 1.
20-189
TROUBLESHOOTING F-5
F-5 Bit pattern 20-(5) Arm IN oil pressure switch does not
light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
When measuring with the engine running, operate the lever slightly and make sure that the work equipment
does not move.
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, or disconnection in Repair or
Is voltage between 3 YES wiring harness between S05 (female) replace
C17 (3) and chassis Is resistance between (1) and chassis ground
normal? C17 (female) (3) and
YES S05 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu-
• Arm lever at neutral: Is resistance be- lated from chassis? Defective contact, short circuit with
20 - 30V ground, or disconnection in wiring Repair or
tween S05 (male) (1) • Turn starting switch
• Arm lever operated NO and (2) normal, and NO harness between C17 (female) (3) - replace
OFF. H13 (10) - S05 (female) (2)
to IN : Max. 1 V is circuit isulated • Disconnect C17 and S05.
from chassis? • Between C17 and S05: Max. 1⏲ Defective arm IN oil pressure switch
• Disconnect S05. • Between wiring harness and chassis : Min. 1 M⏲ (If the condition does not return to Replace
• Start engine. normal even when the switch is
NO
• Arm lever at neutral : replaced, go to H-5.)
Min. 1 M⏲
• Arm lever operated
to IN: Max. 1 ⏲
• See Note 1.
20-190
TROUBLESHOOTING F-7
F-6 Bit pattern 20-6 Arm Out oil pressure switch does not
light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
When measuring with the engine running, operate the lever slightly and make sure that the work equipment
does not move.
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, or disconnection in Repair or
Is voltage between 3 YES wiring harness between S03 (female) replace
C17 (11) and chassis Is resistance between (1) and chassis ground
normal? C17 (female) (11) and
YES S03 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with Repair or
• Arm lever at neutral: Is resistance bet- lated from chassis? ground. or disconnection in wiring replace
20 - 30V harness between C17 (female) (11) -
ween S03 (male) (1) • Turn starting switch OFF.
• Arm lever operated NO and (2) normal, and NO H13 (12) - S03 (female) (2)
• Disconnect C17 and S03.
to OUT: Max. 1 V is circuit insulated • Between C17 and S03: Max. 1 ⏲
from chassis? • Between wiring harness and chassis : Min. 1 M⏲ Defective arm OUT oil pressure switch Replace
• Disconnect S03. (If the condition does not return to
• Start engine. normal even when the switch is
NO
• Arm lever at neutral: replaced, go to H-5.)
Min. 1 M⏲
• arm lever operated to
OUT: Max. 1 ⏲
• See Note 1.
20-191
TROUBLESHOOTING F-7
F-7 Bit pattern 21-(1) Bucket CURL oil pressure switch does
not light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
When measuring with the engine running, operate the lever slightly and make sure that the work equipment
does not move.
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
20-192
TROUBLESHOOTING F-8
F-8 Bit pattern 21-(2) Bucket DUMP oil pressure switch does
not light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
When measuring with the engine running, operate the lever slightly and make sure that the work equipment
does not move.
(When measuring with the engine stopped, charge the accumulator first.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact or disconnection in Repair or
Is voltage between 3 YES wiring harness between S07 (female) replace
C16 (12) and chassis Is resistance between (2) and chassis ground
normal? C16 (female) (12) and
YES S07 (female) (2) nor-
• Start engine. 2 mal, and is circuit insu- Defective contact, short circuit with Repair or
• Bucket lever at Is resistance bet- lated from chassis? ground, or disconnection in wiring replace
neutral: 20 - 30V harness between C16 (female) (12)
ween S07 (male) (1) • Turn starting switch
• Bucket lever NO and (2) normal, and NO and S07 (female) (2)
OFF.
operated to DUMP: is circuit insulated • Disconnect C16 and S07.
Max. 1 V from chassis? • Between C16 and S07: Max. 1 ⏲ Defective bucket DUMP oil pressure
• Disconnect S07. • Between wiring harness and chassis: Min. 1 M⏲ switch
• Start engine. (If the condition does not return to Replace
NO
• Bucket lever at normal even when the switch is
neutral : Min. 1 M⏲ replaced, go to H-5.)
• Bucket lever
operated to DUMP:
Max. 1 ⏲
* See Note 1.
20-193
TROUBLESHOOTING F-9
F-9 Bit pattern 21-(3) Swing lock switch does not light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
★ If the panel display is normal. (If the swing lock lamp does not light up, go to M-21.)
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defective contact, short circuit with
Is voltage between 3 YES ground, or disconnection in wiring Repair or
C17 (16) and chassis Is resistance between harness between X05 (female) (2) - replace
normal? C17 (female) (16) and X01 (5) -H08 (6) - chassis ground
YES X05 (female) (1) nor-
• Turn starting switch 2 mal, and is circuit insu-
ON. Is resistance bet- lated from chassis? Defective contact, short circuit with
• Swing lock switch ground, or disconnection in wiring Repair or
ween X05 (female) • Turn starting switch
ON: Max. 1V NO (1) and (2) normal, NO harness between C17 (female) (16) - replace
OFF. X01 (4) - X05 (male) (1)
OFF: 20 - 30V and is circuit insu- • Disconnect C17 and X05.
lated from chassis? • Between C17 and X05: Max. 1 ⏲
• Turn starting switch • Between wiring harness and chassis : Min. 1 M⏲
OFF. Defective swing lock switch Replace
NO
• Disconnect X05.
• Swing lock switch
ON: Max. 1⏲ OFF:
Min. 1 M⏲
20-194
TROUBLESHOOTING F-11
F-11 Bit pattern 22-(6) L.H. knob switch does not light up
★ This troubleshooting is carried out when there is still an abnormality, so when disconnecting the
connector and inserting the T-adapter, or when removing the T-adapter and returning the connector
to its original position, if the monitor code display returns to normal, the problem has been re-
moved.
★ When fuse No. 5 is not blown.
★ Before carrying out troubleshooting, check that all the related connectors are properly inserted.
★ Always connect any disconnected connectors before going on the next step.
Cause Remedy
YES
Defective governor, pump controller Replace
1
Defecitve contact, or disconnection in Repair wiring
wiring harness between knob switch harness
Is voltage between 3 YES outlet - M23 (4) - G30(4) - C03
C03 (9) and chassis (female) (9)
normal?
YES Is resistance
between terminals of
• Turn starting switch 2
knob switch normal?
ON.
• Knob switch Is voltage between Defective L.H. knob switch Replace
NO knob switch inlet • Turn starting switch NO
ON: 20 -30V
terminal and chassis OFF.
OFF: Max. 1 V
normal? • Disconnect switch terminal.
• Knob switch Defective contact, or disconnection in Repair wiring
• Turn starting switch ON: Max. 1⏲ OFF: Min. 1 M⏲ wiring harness between fuse No. 5 - harness
ON. NO H12 (16) - G30(3) - M23(3) knob
• 20 - 30V switch inlet
20-195
MEMO
TROUBLESHOOTING
20-196
TROUBLESHOOTING
TROUBLESHOOTING OF HYDRAULIC,
MECHANICAL SYSTEM (H MODE)
Table of failure modes and causes.. ........................................................................................................ 20-198
All work equipment, travel, swing
H- 1 Speeds of all work equipment, swing, travel are slow or lack power......................................... 20-202
H- 2 There is excessive drop in engine speed, or engine stalls.. ..................................................... 20-204
H- 3 No work equipment, travel, swing move.................................................................................... 20-205
H- 4 Abnormal noise generated (around pump).. ............................................................................. 20-205
H- 5 Auto-deceleration does not work.. ............................................................................................ 20-206
H- 6 Fine control ability is poor or response is poor.. ....................................................................... 20-206
Work equipment
H- 7 Boom is slow or lacks power.. ................................................................................................... 20-208
H- 8 Arm is slow or lacks power........................................................................................................ 20-210
H- 9 Bucket is slow or lacks power.. ................................................................................................. 20-212
H- 10 Work equipment (boom, arm, bucket) does not move.. ............................................................ 20-213
H- 11 Excessive hydraulic drift (boom, arm bucket).. ......................................................................... 20-213
H- 12 Excessive time lag (engine at low idling).. ................................................................................ 20-214
H- 13 Other equipment moves when single circuit is relieved.. .......................................................... 20-214
H- 14 In F/O modes, work equipment speed is faster than set speed.. .............................................. 20-215
H- 15 Lack of power when pressure rises.. ........................................................................................ 20-215
Compound operations
H- 16 In compound operations, work equipment with larger load is slow.. ......................................... 20-215
H- 17 In swing + boom RAISE, boom RAISE is slow.. ........................................................................ 20-216
Travel system
H- 21 Travel speed is slow.. ................................................................................................................ 20-218
H- 23 Travel speed does not switch or is faster than set speed.. ........................................................ 20-220
Swing system
H- 25 Does not swing (both left and right, one direction only).. .......................................................... 20-221
H- 26 Swing acceleration is poor or swing speed is slow (both left and right, one direction only).. .... 20-222
H- 27 Excessive overrun when stopping swing (both left and right, one direction only).. ................... 20-224
H- 28 Excessive shock when stopping swing (one direction only)...................................................... 20-225
H- 29 Excessive abnormal noise when stopping swing.. .................................................................... 20-225
H- 30 Excessive hydraulic drift of swing (when brake is ON, when brake is OFF).. ........................... 20-226
H- 31 Swing speed is faster than specified speed.. ............................................................................ 20-227
20-197
TROUBLESHOOTING TABLE OF FAILURE MODES AND CAUSES
Control valve
Piston pump
Control pump
Pump proper
Servo piston
TVC valve
LS valve
Damper
Strainer
Spool
Failure mode
Speeds of all work equipment, swing, travel are slow or lack power 왌 왌 왌 왌
All work equipment,
★ In the failure modes, modes for compound operations are used when independent operations are normal
20-198
왌
왌
Main relief valve
왌
Unload valve
왌
왌
왌
왌
왌
왌
왌
왌
왌
Pressure compensation valve
LS circuit check valve
왌
왌
왌
왌
LS shuttle valve
왌
왌
LS select valve
왌
TROUBLESHOOTING
LS circuit throttle
왌
Arm counterbalance valve
왌
왌
Boom
valve
왌
왌
Rege-
Arm
neration
Control valve
왌
왌
왌
왌
왌
Safety-suction valve
왌
왌
왌
Suction valve
왌
왌
왌
왌
왌
왌
왌
왌
왌
왌
왌
PPC valve
왌
왌
왌
왌
왌
PPC shuttle
왌
Safety lock vlave
왌
왌
Swing PPC slow return valve
Swivel joint
왌
Engine system
H-9
H-8
H-7
H-6
H-5
H-4
H-3
H-2
H-1
H-31
H-29
H-28
H-23
H-21
H-19
H-18
H-17
H-16
H-15
H-14
H-13
H-12
H-11
H-30
H-27
H-26
H-25
H-10
code
Troubleshooting
20-199
TABLE OF FAILURE MODES AND CAUSES
TROUBLESHOOTING TABLE OF FAILURE MODES AND CAUSES
Safety-suction valve
2-stage relief
LS-EPC
Failure mode
Speeds of all work equipment, swing, travel are slow or lack power 왌 왌
All work equipment,
★ In the failure modes, modes for compound operations are used when independent operations are normal
20-200
Safety valve
Counterbalance valve
Check valve
왌
Travel speed selector servo piston
Travel motor
왌
Leakage, breakage inside body
왌
왌
Swing machinery
TROUBLESHOOTING
Final drive
왌
왌
왌
왌
Hydraulic cylinder
왌
왌
Boom lock valve
왌
Back pressure valve (Lift check valve)
왌
Travel junction valve
왌
왌
Holding brake (Swing machinery)
왌
왌
왌
RAISE
왌
Boom
LOWER
왌
왌
왌 왌
IN
왌
왌
OUT
왌
왌
왌
CURL
왌
왌
DUMP
Arm Bucket
Pressure switch
왌
왌
왌 왌
Swing
왌
Travel
H-9 Pump pressure sensor
H-8
H-7
H-6
H-5
H-4
H-3
H-2
H-1
H-31
H-29
H-28
H-23
H-21
H-19
H-18
H-17
H-16
H-15
H-14
H-13
H-12
H-11
H-30
H-27
H-26
H-25
H-10
Troubleshooting code
20-201
TABLE OF FAILURE MODES AND CAUSES
TROUBLESHOOTING H-1
3 YES
NO
20-202
TROUBLESHOOTING H-1
Cause Remedy
20-203
TROUBLESHOOTING H-2
Cause Remedy
YES
1
Clogged throttle inside servo Clean
Is throttle inside
servo clogged?
2 YES
Defective piston pump Assy Replace
Is engine speed at
arm IN relief normal?
NO
See troubleshooting for -
• See Note 1. NO engine (S mode)
Note 1:
* Engine speed (reference) at arm IN relief when engine and pump are normal
20-204
TROUBLESHOOTING H-3,H-4
Cause Remedy
Cause Remedy
3 YES
Go to 4
YES Do bubbles
disappear when
engine is stopped?
2 Improper hydraulic oil Change
NO
hydraulic oil
YES Are there bubbles
inside hydraulic tank? Clogged by external object Remove
YES
1 4 (cloth, etc.)
Is suction strainer
Is hydraulic tank oil
clogged by external
level normal? NO object? 5 YES
Is suction strainer
Defect inside pump Repair or
• External object: clogged with metal replace
Cloth, etc. particles or are metal
NO particles stuck to Operate for a short time and Inspect again
drain plug?
watch for any change in (depending
NO symptoms
on changes
in symptoms)
20-205
TROUBLESHOOTING H-5, H-6
Cause Remedy
1 YES
Defective pressure switch Replace
Does condition
become normal when
pressure switch is
replaced? Defective operation of PPC Repair or
shuttle valve in applicable replace
NO system (swing or travel)
Cause Remedy
1 YES
Cloggd throttle in LS circuit Clean
Is throttle in LS circuit
clogged?
Defective servo valve
assembly (LS valve), or Replace
NO defective servo piston
20-206
MEMO
TROUBLESHOOTING
20-207
TROUBLESHOOTING H-7
YES
6
8 YES
4
Is operating pressure
Is pressure normal when boom
YES compensation valve for NO LOWER is being
boom normal, or does
pressure compensation operated?
piston move smoothly?
3 • 4.9 ± 2.9 MPa NO
• It is also possible to (50 ± 30 kg/cm2)
Does control valve interchange with • Engine at high idling
YES spool for boom move other compensation
smoothly? valve.
• See Note 2. NO
2
• See Judgement
Table. (Bit pattern 20
(3) (4))
• See Note 1. NO
Note 1: If auto-deceleration is canceled when boom RAISE or boom LOWER is operated, system is normal.
Note 2: After inspection, do not forget to return the interchanged valves to the original position.
20-208
TROUBLESHOOTING H-7
Cause Remedy
7 YES
High Defective operation of boom Correct or
Is operating pressure lock valve replace
normal when boom
RAISE is being
operated?
Low Defective boom cylinder Correct or
• 14.9 ± 2.5 MPa NO
(150 ± 25 kg/cm2 )
piston packing replace
• Engine at high idling
• At max. reach, no
load Defective operation of LS Correct or
shuttle valve (LS shuttle for replace
arm or bucket)
20-209
TROUBLESHOOTING H-8
YES
6
Does LS shuttle
YES
valve move
5 smoothly?
• see Judgement
Table. (Bit pattern 20
(5), (6)) NO
• See Table 1.
Note 1: If the auto-decleration is canceled when arm IN or arm OUT is operated, the system is normal.
Note 2: After inspection, do not forget to return the interchanged valves to the original position.
20-210
TROUBLESHOOTING H-8
Cause Remedy
7 YES
Defective operation of arm Correct or
regeneration valve or arm replace
Is leakage from arm counterbalance valve.
cylinder normal?
Defective arm cylinder Correct or
• Max. 20 cc/min NO piston packing replace
• Engine at high idling
20-211
TROUBLESHOOTING H-9
Cause Remedy
3 YES
Go to A
Does control valve
YES spool for bucket
2 move smoothly? Defective operation of Correct or
control valve spool for replace
YES Is output pressure of NO
bucket
PPC valve normal?
1
Note 1: If the auto-deceleration is canceled when bucket CURL or bucket DUMP is operated, the system is
normal.
Note 2: After inspection, do not forget to return the interchanged valves to the original position.
20-212
TROUBLESHOOTING H-10, H-11
1 YES
Defective control valve spool Correct or
replace
Is output pressure of
PPC valve normal?
1 YES
Defective hydraulic cylinder Replace
Does speed of piston packing
downward movement
become faster when
lever is operated? 2 YES
Defective operation of Replace
• See TESTING AND Does condition satety-suction valve
ADJUSTING. become normal when
• It is also possible to NO safety-suction valve
measure leakage of is interchanged?
cylinder. Defective operation of boom Correct or
• Max. 20 cc/min NO lock valve replace
• At relief
• Engine at high idling
Note 1: After inspection, do not forget to return the interchanged valves to the original position.
20-213
TROUBLESHOOTING H-12, H-13
Cause Remedy
Defective operation of
pressure compensation
valve slipper seal (The
slipper seal in the pressure Replace
compensation valve of the
circuit that moved is
defective.)
20-214
TROUBLESHOOTING H-14, H-15, H-16
1 YES
Defective LS valve Correct or
replace
Is output pressure of
LS-EPC solenoid
valve normal?
Defective operation of LS- Correct or
• See Note 1. NO EPC solenoid valve replace
2 YES
Defective main relief valve Replace
Is output pressure of
YES 2-stage relief
1 solenoid valve
normal?
Defective operation of 2- Repair or
• Min 3.0 Mpa (31 kg/cm2) NO
Is oil pressure switch
• H/O or G/O mode
stage relief solenoid valve replace
normal? • Power max. mode
• L.H. knob switch ON
• Arm IN relief
• Operate each control Defective oil pressure switch Replace
lever, and if auto- NO
deceleration is
canceled, condition is
normal.
20-215
TROUBLESHOOTING H-17, H-18, H-19
Cause Remedy
1 YES
Defective operation of LS Correct or
Is output pressure of
select valve replace
LS select solenoid
valve normal?
Defective operation of PPC Correct or
• Min. 3.0 MPa NO shuttle valve for LS select replace
(31 kg/cm2)
• Operate boom circuit
RAISE (operate lever
slightly)
Cause Remedy
1 YES
Defective operation of LS Repair or
Is pressure of LS
bypass valve replace
bypass solenoid
valve circuit normal?
Defective operation of LS Repair or
• 0.2 ± 0.2 MPa NO bypass solenoid valve replace
(2 ± 2kg/cm2)
• Engine at high idling
• Operate boom
RAISE and travel
simultaneously.
20-216
MEMO
TROUBLESHOOTING
20-217
TROUBLESHOOTING H-21
3 YES
20-218
TROUBLESHOOTING H-21
Cause Remedy
Go to H-20 -
20-219
TROUBLESHOOTING H-23, H-24
• See Judgement
Table. Defective travel pressure Replace
(Bit pattern 20 (2)) NO switch
• If autodeceleration is
canceled when travel
is operated, system
is normal.
Travel speed Lo Mi Hi
Cause Remedy
• Max. : 30 l /min
• Engine at high idling Defective travel motor Replace
NO
• At travel relief
20-220
TROUBLESHOOTING H-25
Cause Remedy
3 YES
Defective swing machinery Repair or
Is any foreign replace
YES material found in oil
2 drained from swing
machinery? Defective swing holding Repair or
Is output pressure of
YES swing holding brake NO brake or swing motor replace
solenoid valve
1 normal?
• Min. 3.0 MPa Defective operation of Correct or
Is swing pressure (31 kg/cm2) holding brake solenoid valve replace
NO
switch normal? • Operate swing lever
(or operate work
equipment lever).
• See Judgement Defective swing pressure Replace
Table. (Bit pattern 20
NO switch
(1))
• If autodeceleration is
canceled when swing
is operated, system
is normal.
Cause Remedy
20-221
TROUBLESHOOTING H-26
4 YES
Does LS bypass
YES valve move
3 smoothly?
Is output pressure of
YES NO
LS bypass solenoid
valve normal?
2 • Travel operated
independengly. NO
Both left and Does LS shuttle • Min. 2.7 MPa
right Both valve move (28 kg/cm2)
direction smoothly?
YES
1 8
Is pressure compen-
Is swing acceleration
sation valve normal, or
poor in both YES
does pressure
directions or in one compensation valve
direction only? 7
piston move smoothly?
• It is also possible to
YES Does control valve interchange with other
spool move NO
compensation valve.
smoothly?
6 • Note : After inspection,
do not forget to return
Is outpur pressure (at to the original position.
YES
shuttle block end) of
PPc valve normal? NO
5
• Same conditions as
One direction Is output pressure of for Item 5
only PPC valve normal? • Remove PPC shuttle NO
block inlet hose, fit
adapter, and block
• Min 3.0 MPa tip. (Note).
(31 kg/cm2)
• Engine at high idling NO
• Turn swing lock
switch ON (lock).
Note: If the adapter for blocking the circuit is not availabel, interchange PPC hose of swing with one of bucket
(CURL, DUMP), boom (LOWER), or arm (IN).
20-222
TROUBLESHOOTING H-26
Cause Remedy
20-223
TROUBLESHOOTING H-27
Cause Remedy
b) Both directions
Cause Remedy
Defective swing motor Repair or replace
20-224
TROUBLESHOOTING H-28, H-29
1 YES
Does condition be-
Defective swing PPC slow Correct or
come normal when left return valve (check valve) replace
and right swing PPC
slow return valves are
interchanged?
Defective PPC valve Replace
NO
Cause Remedy
20-225
TROUBLESHOOTING H-30
Cause Remedy
Cause Remedy
1 YES
Defective operation of swing Repair or
Is output pressure of
holding brake replace
swing holding brake
solenoid valve
normal?
• 0.2 ± 0.2 MPa
Defective operation of swing Correct or
NO
(2 ± 2 kg/cm2 ) holding brake solenoid valve replace
• When 5 seconds
have passed after all
swing and work
equipment control
levers have been
returned to neutral.
20-226
TROUBLESHOOTING H-31
Cause Remedy
1 YES
Defective operation of LS Replace
Is output pressure of valve servo
LS-EPC solenoid assembly
valve normal?
Defective LS-EPC solenoid Correct or
• See Table 1. NO
replace
20-227
MEMO
TROUBLESHOOTING
20-228
TROUBLESHOOTING
TROUBLESHOOTING OF MACHINE
MONITOR SYSTEM (M MODE)
Action taken by panel and condition of machine when abnormality occurs... ......................................... 20-230
Electrical circuit diagram for monitor system ........................................................................................... 20-232
M- 1 [E101] Abnormality in error data is displayed [E102] Error in clock data is displayed ............. 20-234
M- 2 [E103] Short circuit in buzzer output or contact of 24 V wiring harness with buzzer
drive harness is displayed ........................................................................................................ 20-235
M- 3 [E104] Air cleaner clogging detected is displayed ................................................................... 20-236
M- 4 [E106] Drop in engine oil pressure Hi detected is displayed .................................................... 20-236
M- 5 [E108] Engine water temperature 105°C detected is displayed ............................................... 20-237
M- 6 When starting switch is turned ON, none of lamps on monitor panel light up
for three seconds ..................................................................................................................... 20-238
M- 7 When starting switch is turned ON, monitor panel lamps all stay lighted up
and do not go out ..................................................................................................................... 20-240
M- 8 When starting switch is turned ON, items lighted up on monitor panel are different
from actual machine (model) ................................................................................................... 20-240
M- 9 When starting switch is turned ON (engine stopped), basic check items flash ....................... 20-241
M- 10 Preheating is not being used but preheating monitor lights up ................................................ 20-243
M- 11 When starting switch is turned ON and engine is started, basic check items flash ................. 20-244
M- 12 When starting switch is turned ON (engine stopped), caution items,
emergency stop items flash ..................................................................................................... 20-246
M- 13 When starting switch is turned ON and engine is started, caution items,
emergency stop items flash ..................................................................................................... 20-248
M- 14 When starting switch is turned ON (engine stopped), buzzer does
not sound for 1 second. Caution item flashes but buzzer does not sound ............................... 20-251
M- 15 No abnormality is displayed on monitor but buzzer sounds... .................................................. 20-251
M- 16 Night lighting on monitor panel does not light up (liquid crystal display is normal ................... 20-252
M- 17 Coolant temperature gauge does not rise ............................................................................... 20-253
M- 18 Coolant temperature gauge does not give any display ............................................................ 20-253
M- 19 Fuel level gauge always displays FULL ................................................................................... 20-254
M- 20 Fuel level gauge does not give any display ............................................................................. 20-254
M- 21 Swing lock switch is turned ON (LOCK) but swing lock monitor does not light up ................... 20-255
M- 22 Swing prolix switch is turned ON (prolix), but swing lock monitor does not flash ..................... 20-255
M- 23 Service meter does not advance while engine is running ........................................................ 20-256
M- 24 When starting switch is at OFF and time switch is pressed, time and
service meter are not displayed ............................................................................................... 20-256
M- 25 Defective fuel level sensor system ........................................................................................... 20-257
M- 26 Defective coolant temperature sensor system ......................................................................... 20-258
M- 27 Defective engine oil level sensor system ................................................................................. 20-259
M- 28 Defective coolant level sensor system ..................................................................................... 20-260
M- 30 Wiper does not work or switch is not being used but wiper is actuated ................................... 20-261
20-229
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
- E104 Air cleaner clogging 1. Air cleaner clogging sensor has detected clogging
detected is displayed
20-230
ACTION TAKEN BY MONITOR PANEL WHEN ABNORMALITY
TROUBLESHOOTING OCCURS AND PROBLEMS ON MACHINE
Condition when normal Action by controller when Problem that appears on machine
(voltage, current, resistance) abnormality is detected when there is abnormality
20-231
TROUBLESHOOTING M-1
Cause Remedy
2 YES
Defective monitor panel Replace
Is voltage between
YES P02 (8) (14) and
Disconnecton, defective contact,
1 chassis normal? short circuit with ground in wiring
harness between battery - Repair or
Does service code
display appear again • Turn starting switch NO battery relay B - M11 (1) (2) - replace
after system has OFF. H14 (1) - fuse No. 13 - P02
been reset? • 20 - 30 V (female) (8) (14)
20-234
TROUBLESHOOTING M-2
Cause Remedy
2 YES
Defective monitor panel Replace
Is voltage between
YES P04 (2) and chassis
Short circuit with power source
1 normal? in wiring harness between P01 Repair or
Is resistance (female) (7) and P04 (female) (2) replace
between P04 (male) NO or short circuit in wiring harness
• Turn starting switch
(1) - (2), (2) - chassis between P04 (1) and (2)
ON.
as shown in the
• Buzzer ON: Max. 1 V
table?
• Buzzer OFF: 20 - 30 V
• Turn starting switch
Defective buzzer Replace
OFF.
NO
• Disconnect P04.
Table
20-235
TROUBLESHOOTING M-3,4
Cause Remedy
Note 1: The monitor panel display has returned to normal, but the air cleaner clogging sensor has detected
symptoms of clogging in the past, so carry out troubleshooting of the engine to remove the problem
Cause Remedy
NO
Failure in engine system -
• Turn starting switch (See Note 1)
ON.
Note 1: The monitor panel display has returned to normal, but the engine oil pressure sensor has detected
symptoms of a drop in the oil pressure in the past, so carry out throubleshooting of the engine to
remove the problem.
20-236
TROUBLESHOOTING M-5
YES -
(See M-13 d)
1
Does coolant
temperature gauge on
monitor panel display
red range and is 2 YES Replace
Defective monitor panel
caution lamp flashing?
Note 1: The monitor panel display has returned to normal, but the coolant temperature sensor has detected
symptoms of the coolant temperature reaching 105°C in the past, so carry out troubleshooting of the
engine to remove the problem.
20-237
TROUBLESHOOTING M-6
YES
Defective monitor panel Replace
2
Is voltage between
P01 (9) and chassis Disconnetion, defective contact, short
3 YES circuit with ground in wiring harness Repair or
normal?
between P01 (female) (9) and fuse replace
No. 10
• Turn starting switch Is voltage between
1 ON. fuse No. 10 and
NO chassis normal?
• 20 - 30 V Disconnection, defeictive contact,
Is voltage between short circuit with ground in wiring Repair or
P02 (8) (14) - (1) (9) • Turn starting switch NO harness between fuse No. 10 - H05 replace
normal? ON. (2) - M14 (2) (1) - battery relay M
• 20 - 30 V
• Turn starting switch 4 YES Disconnection, defective contact,
ON. short circuit with ground in wiring Repair or
• 20 -30 V Is voltage between harness between P02 (female) (8) replace
fuse No. 13 and (14) and fuse No. 13
NO chassis normal?
Disconnection, defective contact,
short circuit with ground in wiring Repair or
• Turn starting switch NO harness between fuse No. 13 - H14 replace
ON. (2) - M11 (2) (1) - battery relay B
• 20 - 30 V
Cause Remedy
20-238
TROUBLESHOOTING M-6
20-239
TROUBLESHOOTING M-7, M-8
Cause Remedy
Cause Remedy
1 YES
Defective monitor panel Replace
Is display of
monitoring code 01
as shown in table?
Go to troubleshooting for C -
• Turn starting switch NO
mode (See C-14)
ON.
• Set to monitoring
code 01.
Table
20-240
TROUBLESHOOTING M-9
★ Check that the coolant is at the specified level before carrying out troubleshooting.
Cause Remedy
4 YES
Defective governor, pump controller Replace
Table
20-241
TROUBLESHOOTING M-9
★ Chek that the engine oil is at the specified level before carrying out troubleshooting.
Cause Remedy
Table
20-242
TROUBLESHOOTING M-10
Cause Remedy
20-243
TROUBLESHOOTING M-11
a) Alternator system
Cause Remedy
20-244
TROUBLESHOOTING M-11
Cause Remedy
1
When engine is running
at low idling and wiring Contact of chassis ground with Repair or
harness of oil pressure YES wiring harness between C16 repalce
sensor is removed. 2 (female) (15) - E08 (8) - P10 (c)
Does display go out?
or P10 (A) - E08 (11) - C03 (16)
Is there continuity
• Engine at low idling between C16
NO (female) (15) and 3 YES
Defective governor, pump Repalce
chassis?
controller
Is bit (1) of
• Turn starting switch monitoring code 24
OFF. NO lighted up?
• Disconnect sensor
wiring harness C16. Defective monitor panel Repalce
• Engine at low idling NO
• Set to monitoring
code 24.
20-245
TROUBLESHOOTING M-12
a) Alternator system
Cause Remedy
20-246
TROUBLESHOOTING M-12
Cause Remedy
2 lighted up?
20-247
TROUBLESHOOTING M-13
★ Check that the engine oil pressure is normal before Cause Remedy
carrying out troubleshooting.
See M-11 b) -
See M-9 a) -
Cause Remedy
See M-11 a) -
20-248
TROUBLESHOOTING M-13
20-249
TROUBLESHOOTING M-13
20-250
TROUBLESHOOTING M-14, M-15
20-251
TROUBLESHOOTING M-16
Cause Remedy
Is voltage between
• Turn starting switch
P01 (8) and (12)
ON. Defective contact, or disconnec- Repair or
NO normal?
• Set to monitoring tion in wiring hanress between replace
code 49. P01 (female) (8) - X01 (1) - M38
• Turn starting switch NO (female) (1)
ON.
• Turn light switch ON.
• 20 - 30 V
20-252
TROUBLESHOOTING M-17
20-253
TROUBLESHOOTING M-19, M-20
20-254
TROUBLESHOOTING M-21, M-22
Table
Swing lock switch ON Max. 1 V
Swing lock switch OFF 20 - 30 V
Table
Swing prolix switch ON Max. 1 V
Swing prolix switch OFF 20 - 30 V
20-255
TROUBLESHOOTING M-23, M-24
Cause Remedy
YES
1 See M-13 d) -
Cause Remedy
2 YES
Defective monitor panel Replace
When starting switch
is ON, is panel
display normal?
See M-6 -
• Turn starting switch NO
ON.
20-256
TROUBLESHOOTING M-25
Cause Remedy
Table
Note 1: Difference between fuel level an gauge display. For gaugedisplay position 14 (FULL), the amount of
fuel is 78-100%; and for display position 1 (EMPTY) it is below 14,5%. If the chassis is at an angle, the
displayed amount of fuel will be different from the actual amount. Therefore when checking, stop the
machine at a horizontal place and wait for at least 2 minutes before checking the gauge. (The display is
given a time delay so that the gauge can deal with sudden changes in the fuel level).
Note 2: There is the possibility of defective installation or interference with the sensor inside the tank, so be
carefyul when installing
Note 3: Check for vibration at the connector mount. If there is excessive vibration, take the appropriate action.
20-257
TROUBLESHOOTING M-26
Cause Remedy
Clean con-
YES Defective contact of nector or re-
1 connector (See Note 1) place sensor
Is resistance
between temperature
sensor connector Disconnection in wiring Replace
2 YES harness (See Note 2)
(male) (1) and (2) as sensor
show in table?
Check wiring harness (defective clamp)
visually. (external force applied)
Is it broken?
Table
Note 1: If the problem occurs again, the connector (female) at the chassis end is probably defective, so check
the connector and wiring harness at the chassis end.
Note 2: Check for vibration at the connector mount. If there is excessive vibration, take the appropriate action.
20-258
TROUBLESHOOTING M-27
Cause Remedy
Is any foreign
YES material (dirt) stuck Replace
to moving part of 3 YES Resonance of mount (See Note sensor (See
float?
2) Note 4)
Is ther any large
1 crack, chip, or
NO damage to float?
When float is moved Clean
up and down, is resis- Defective contact of connector connector or
tance between connec- NO (See Note 2) replace
tor (1) and flange as
show in Table 1?
Table
Float UP Max. 1 ⏲
Float DOWN Min. 1 M⏲
Note 1: Variations in oil level. The oil level may change according to the angle of the machine, the engine
speed, or the temperature of the oil, so if there is any display, check the oil level again with the machine
at a horizontal place.
Note 2: If the problem occurs again, the connector (female) at the chassis end is probably defective, so check
the connector and wiring harness at the chassis end.
Note 3: Check for vibration at the connector mount. If there is excessive vibration, take the appropriate action.
Note 4: Defective installation is a possible cause, so be careful when installing. If the problem occurs again,
check for vibration at the connector mount, and if there is excessive vibration, take the appropriate
action.
20-259
TROUBLESHOOTING M-28
Cause Remedy
Table
Float UP Max. 1 ⏲
Float DOWN Min. 1 M⏲
Note 1: Variations in coolant level. The coolant level may change according to the angle of the machine, or the
swaying of the machine, so if there is any display, check the coolant level again with the machine at a
horizontal place.
Note 2: If the problem occurs again, the connector (female) at the chassis end is probably defective, so check
the connector and wiring harness at the chassis end.
Note 3: Check for vibration at the connector mount. If there is excessive vibration, take the appropriate action.
Note 4: Defective installation is a possible cause, so be careful when installing. If the problem occurs again,
check for vibration at the connector mount, and if there is excessive vibration, take the appropriate
action.
20-260
TROUBLESHOOTING M-30
M-30 Wiper does not work or switch is not being used but
wiper is actuated
a) Wiper does not work
★ Check that fuse No. 7 is normal. Cause Remedy
4 YES
Go to A
Is resistance bet-
YES ween M18 (female)
3 (1) - (2), (1) - (4) as
shown in Table 1? Defective wiper washer Replace
YES Is voltage between • Turn starting switch NO
switch
M46 (2) and (1) OFF.
2 normal? Defective contact, or discon-
• Disconnect M18. Replace
nection in wiring harness bet- wiring
Is resistance • 20 - 30 V
YES between W10 (male) ween fuse (7) and W08 (female) harness
• Turn starting switch NO (5), or W08 (female) (1), (8) and
(3) (4) - W08 (4) (18) ON.
1 normal? GND
• Max. 1 ⏲ Defective contact, or disconnec-
Is resistance Replace
between W10 • Turn starting switch tion in wiring harness between
M10 (male) (3) (4) and W08 wiring
(female) (3) and (4) OFF. NO
normale? • Disconnect W10, (male) (3) (4) and W08 (female) harness
W08. (4) (8)
• Front window closed • Replace
position: Min. 1 M ⏲ • Defective rear limit switch • Set window
• Turn starting switch NO • Front window is open
OFF. in posistion
• Disconnect W10. correctly.
YES
Defective wiper motor Replace
6
Table 1 Table 2
Actuation mode M18 (female) W08 (female) Resistance (⏲) Between W04 (female) (1) - W08 (female) (7)
Between (1) - (4) Between (12) - (15) Max. 1 ⏲ Between W04 female) (3) - W08 (female) (6)
INT mode Between (1) - (2) Between (12) - (14) Between W04 (female) (4) - w08 (female) (11) Max. 1 ⏲
Max. 1 M⏲
Between (2) - (4) Between (14) - (15) Between W04 (female) (5) - W08 (female) (9)
Between (1) - (2) Between (12) - (14) Between W04 (female) (6) - W08 (female) (10)
OFF mode Between (1) - (4) Between (12) - (15) Max. 1 M⏲ Between w04 (female) (1) (3) (4) (5) (6) - GND Min. 1 M⏲
20-261
TROUBLESHOOTING M-30
Table 3
20-262
TROUBLESHOOTING M-30
Cause Remedy
3 YES
Go to A
Is resistance bet-
YES ween M18 (female)
(1) - (2), (1) - (4) as
2 shown in Table 1?
Defective wiper washer Replace
Is resistance NO switch
YES between M18 (male)
(3) and (4) normal?
1 Defective contact. or
disconnection in wiring Replace
Is resistance • Max. 1 M⏲
between W10 • Turn starting switch
harness between M10 wiring
(female) (3) and (4) OFF. NO (male) (3) (4) - W08 (female) harness
normal? • Disconnect W10, (4) (18)
W08.
• Front window closed
posistion: Min. 1 M⏲
• Defective rear limit switch • Replace
• Turn starting switch NO • Front window is open • Set window
OFF. in position
• Disconnect W10. correctly.
YES
6 Defective wiper motor Replace
Table 1
20-263
TROUBLESHOOTING M-30
Table 3
20-264
DISASSEMBLY AND ASSEMBLY
30-1
DISASSEMBLY AND ASSEMBLY
30-2
DISASSEMBLY AND ASSEMBLY METHOD OF USING MANUAL
(Example)
REMOVAL OF 쎻 쎻 쎻 쎻 ASSEMBLY ....... Title of operation
............................................................. Precautions related to safety when carrying out the operation
1. XXXX(1) ............................................... Step in operation
★ .......................................................... Technique or important point to remember when removing
XXXX (1).
2. 욼 욼 욼 욼 (2): ......................................... 1 Indicates that a technique is listed for use during instal-
lation
3. 첸 첸 첸 첸 assembly (3)
2. General precautions when carrying out installation or removal (disassembly or assembly) of units are given
together as PRECAUTIONS WHEN CARRYING OUT OPERATION, so be sure to follow these precautions
when carrying out the operation.
30-3
DISASSEMBLY AND ASSEMBLY METHOD OF USING MANUAL
mm mm kgm Nm
6 10 1.35 ± 0.15 13.2 ± 1.4
8 13 3.2 ± 0.3 31.4 ± 2.9
10 17 6.7 ± 0.7 65.7 ± 6.8
12 19 11.5 ± 1.0 112 ± 9.8
14 22 18.0 ± 2.0 177 ± 19
16 24 28.5 ± 3 279 ± 29
18 27 39 ± 4 383 ± 39
20 30 56 ± 6 549 ± 58
22 32 76 ± 8 745 ± 78
24 36 94.5 ± 10 927 ± 98
27 41 135 ± 15 1320 ± 140
30 46 175 ± 20 1720 ± 190
33 50 225 ± 25 2210 ± 240
36 55 280 ± 30 2750 ± 290
39 60 335 ± 35 3280 ± 340
30-4
DISASSEMBLY AND ASSEMBLY PRECAUTIONS WHEN CARRYING OUT OPERATION
Nominal number Plug (nut end) Sleeve nut (elbow end) Use the two items below as a set
02 07376-50210 07221-20210 (Nut), 07222-00210 (Plug)
03 07376-50315 07221-20315 (Nut), 07222-00312 (Plug)
04 07376-50422 07221-20422 (Nut), 07222-00414 (Plug)
05 07376-50522 07221-20522 (Nut), 07222-00515 (Plug)
06 07376-50628 07221-20628 (Nut), 07222-00616 (Plug)
10 07376-51034 07221-21034 (Nut), 07222-01018 (Plug)
12 07376-51234 07221-21234 (Nut), 07222-01219 (Plug)
Nominal number Flange (hose end) Sleeve head (tube end) Split flange
04 07379-00400 07378-10400 07371-30400
05 07379-00500 07378-10500 07371-30500
3) If the part is not under hydraulic pressure, the following corks can be used.
Nominal Dimensions
Part Number
number D d L
06 07049-00608 6 5 8
08 07049-00811 8 6.5 11
10 07049-01012 10 8.5 12
12 07049-01215 12 10 15
14 07049-01418 14 11.5 18
16 07049-01620 16 13.5 20
18 07049-01822 18 15 22
20 07049-02025 20 17 25
22 07049-02228 22 18.5 28
24 07049-02430 24 20 30
27 07049-02734 27 22.5 34
30-5
DISASSEMBLY AND ASSEMBLY PRECAUTIONS WHEN CARRYING OUT OPERATION
★ When operating the hydraulic cylinders for the first time after reassembling cylinders, pumps and other
hydraulic equipment removed for repair, always bleed the air as follows:
1. Start the engine and run at low idling.
2. Operate the work equipment control lever to operate the hydraulic cylinder 4 - 5 times, stopping the
cylinder 100 mm form the end of its stroke.
3. Next, operate the hydraulic cylinder 3 - 4 times to the end of its stroke.
4. After doing this, run the engine at normal speed.
★ When using the machine for the first time after repair or long storage, follow the same procedure.
30-6
DISASSEMBLY AND ASSEMBLY SPECIAL TOOL LIST
30-7
DISASSEMBLY AND ASSEMBLY SPECIAL TOOL LIST
796-720-1670 Ring 1
07281-01279 Clamp 1
4
796-720-1660 Ring 1
07281-01159 Clamp 1
30-8
DISASSEMBLY AND ASSEMBLY SPECIAL TOOL LIST
792-785-1100 Remover 1
• Removal, installation of
Removal of boom foot
work equipment assembly P 790-101-3800 Puller (50 ton long) 1
pin
• Boom assembly
790-101-1102 Pump (30 ton) 1
30-9
DISASSEMBLY AND ASSEMBLY GOVERNOR MOTOR
REMOVAL OF GOVERNOR
MOTOR ASSEMBLY
Disconnect the cable from the negative (-) terminal of
the battery.
INSTALLATION OF GOVERNOR
MOTOR ASSEMBLY
• Carry out installation in the reverse order to removal.
1
★ Adjust the rod. For details, see TESTING AND
ADJUSTING, Testing and adjusting of governor
motor lever stroke.
30-10
DISASSEMBLY AND ASSEMBLY HYDRAULIC OIL COOLER
INSTALLATION OF HYDRAULIC
OIL COOLER ASSEMBLY
• Carry out installation in the reverse order to removal.
30-11
DISASSEMBLY AND ASSEMBLY RADIATOR • HYDRAULIC OIL COOLER
REMOVAL OF RADIATOR •
HYDRAULIC OIL COOLER
ASSEMBLY
Lower the work equipment completely to the ground
and stop the engine. Then loosen the oil filler cap
slowly to release the pressure inside the hydraulic
tank.
• Remove the hydraulic tank strainer, and using tool B,
stop the oil.
• When not using tool B, remove the drain plug,
and drain the oil from the hydraulic tank and in-
side the system.
30-12
DISASSEMBLY AND ASSEMBLY RADIATOR • HYDRAULIC OIL COOLER
INSTALLATION OF RADIATOR •
HYDRAULIC OIL COOLER
ASSEMBLY
• Carry out installation in the reverse order to removal.
30-13
DISASSEMBLY AND ASSEMBLY ENGINE • HYDRAULIC PUMP
REMOVAL OF ENGINE •
HYDRAULIC PUMP ASSEMBLY
Disconnect the cable from the negative (-) terminal of
the battery.
30-14
DISASSEMBLY AND ASSEMBLY ENGINE • HYDRAULIC PUMP
30-15
DISASSEMBLY AND ASSEMBLY ENGINE • HYDRAULIC PUMP
31. Remove mount bolt, then lift off engine and hydraulic
pump assembly (36) slowly. 3
30-16
DISASSEMBLY AND ASSEMBLY ENGINE • HYDRAULIC PUMP
INSTALLATION OF ENGINE •
HYDRAULIC PUMP ASSEMBLY
• Carry out installation in the reverse order to removal.
1
• Bleeding air
★ Bleed the air from the hydraulic pump.
For details, see TESTING AND ADJUSTING,
Bleeding air.
30-17
DISASSEMBLY AND ASSEMBLY DAMPER
REMOVAL OF DAMPER
ASSEMBLY
1. Remove main pump assembly. For details, see RE-
MOVAL OF MAIN PUMP ASSEMBLY.
INSTALLATION OF DAMPER
ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-18
DISASSEMBLY AND ASSEMBLY FUEL TANK
30-19
DISASSEMBLY AND ASSEMBLY CENTER SWIVEL JOINT
INSTALLATION OF CENTER
SWIVEL JOINT ASSEMBLY
• Carry out installation in the reverse order to removal.
1
• Bleeding air
✶ Bleed the air from the travel motor.
For details, see TESTING AND ADJUSTING,
Bleeding air.
30-20
DISASSEMBLY AND ASSEMBLY SWING MOTOR
REMOVAL OF SWING
MOTOR ASSEMBLY
Lower the work equipment completely to the ground
and stop the engine. Loosen the oil filler cap slowly to
release the pressure inside the hydraulic tank. Then
set the safety lock lever to the LOCK position.
1. Disconnect hoses (1), (2), (3), and (4), and tubes (5)
and (6), then remove filter and bracket assembly.
★ Machines equipped with additional attachment
circuit
INSTALLATION OF SWING
MOTOR ASSEMBLY
• Carry out installation in the reverse order to removal.
30-21
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
REMOVAL OF SWING
MACHINERY ASSEMBLY
1. Remove swing motor assembly. For details, see RE-
MOVAL OF SWING MOTOR ASSEMBLY.
INSTALLATION OF SWING
MACHINERY ASSEMBLY
• Carry out installation in the reverse order to removal.
1
• Bleeding air
★ Bleed the air from the swing motor. For details,
see TESTING AND ADJUSTING, Bleeding air.
30-22
DISASSEMBLY AND ASSEMBLY SWING MOTOR
a) Clean the mating surfaces from oils or paint and fit the
gearbox to the undercarriage.
30-23
DISASSEMBLY AND ASSEMBLY SWING MOTOR
Backlash
0.05 - 0.25 mm
Play
0.0 - 0.1 mm
NOT KEY TYPE
SPLINE TYPE
30-24
DISASSEMBLY AND ASSEMBLY SWING MOTOR
Dissasembly
30-25
DISASSEMBLY AND ASSEMBLY SWING MOTOR
30-26
DISASSEMBLY AND ASSEMBLY SWING MOTOR
Thread specification:
F12 Thread Tool
60 M24x1.5 3793077
Assembly
30-27
DISASSEMBLY AND ASSEMBLY SWING MOTOR
F12 Nm ± 10
60 60
30-28
DISASSEMBLY AND ASSEMBLY SWING MOTOR
Item Title
221 O-RING
225 O-RING
229 O-RING
231 SEAL CARRIER
233 SHAFT SEAL
488 SHIM
491 HEX SOCKET SCREW
30-29
DISASSEMBLY AND ASSEMBLY SWING MOTOR
30-30
DISASSEMBLY AND ASSEMBLY REVOLVING FRAME
REMOVAL OF REVOLVING
FRAME ASSEMBLY
Disconnect the cable from the negative (-) terminal of
the battery.
30-31
DISASSEMBLY AND ASSEMBLY REVOLVING FRAME
30-32
DISASSEMBLY AND ASSEMBLY REVOLVING FRAME
INSTALLATION OF REVOLVING
FRAME ASSEMBLY
• Carry out installation in the reverse order to removal.
Mounting bolt
Item Mounting bolt
tightening torque
Model Size Q'ty Nm (kgm)
PW170-6 20-105 26 549 ± 59 (56 ± 6)
• Bleeding air
★ Bleed the air. For details, see TESTING AND
ADJUSTING, Bleeding air.
30-33
DISASSEMBLY AND ASSEMBLY SWING CIRCLE
30-34
DISASSEMBLY AND ASSEMBLY SWING CIRCLE
INSTALLATION OF SWING
CIRCLE ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-35
DISASSEMBLY AND ASSEMBLY
REMOVAL OF HYDRAULIC
TANK ASSEMBLY
1. Drain oil from hydraulic tank.
30-36
DISASSEMBLY AND ASSEMBLY
INSTALLATION OF HYDRAULIC
TANK ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air.
For details, see TESTING AND ADJUSTING,
Bleeding air.
30-37
DISASSEMBLY AND ASSEMBLY
30-38
DISASSEMBLY AND ASSEMBLY
• Bleeding air
★ Bleed the air from main pump.
For details, see TESTING AND ADJUSTING,
Bleeding air.
30-39
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
REMOVAL OF CONTROL
VALVE ASSEMBLY
Release the remaiing pressure in the hydraulic
circuit.
For details, see TESTING AND ADJUSTING, Re-
leasing pressure in hydraulic circuit.
30-40
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
INSTALLATION OF CONTROL
VALVE ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the circuit between the valve
and the hydraulic cylinder.
For details, see TESTING AND ADJUSTING,
Bleeding air.
30-41
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
30-42
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
30-43
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
LS select valve:
127.5 ± 19.6 Nm (13±2 kgm)
2) Fit O-rings and install LS shuttle valves
(25a) and (25b).
30-44
DISASSEMBLY AND ASSEMBLY CONTROL VALVE
30-45
DISASSEMBLY AND ASSEMBLY LS SELECT VALVE
DISASSEMBLY OF LS SELECT
VALVE
2. Remove O-rings (4) and (5), and seal (6) from sleeve
(1).
ASSEMBLY OF LS SELECT
VALVE
• Before assembling coat the sliding surface with
engine oil.
4. Install O-rings (4) and (5), and seal (6) to sleeve (1).
30-46
DISASSEMBLY AND ASSEMBLY LS SHUTTLE VALVE
ASSEMBLY OF LS SHUTTLE
VALVE
• Before assembling coat the sliding surface with
engine oil.
1. Install ring (8) and O-rings (7) and (6) to plug (1).
2. Fit ring (4) and O-ring (3) to seat (2), then assemble
ball (5) to plug (1), and install seat (2).
INDENTIFICATION OF LS Type B
SHUTTLE VALVE
Shuttle valves are identified by markings on the valve
assembly.
Type A - 1 mark
Type B - 3 marks
30-47
DISASSEMBLY AND ASSEMBLY PRESSURE COMPENSATION VALVE
2. Remove plug (4) and ball (5) form piston (2). * After disassembling, if there is any abnormality
in sleeve (12), piston (13), or seals (15) and
3. Remove seals (6) and (7) from piston (2). (16), replace the whole pressure compensa-
tion valve assembly.
4. Remove O-ring (8) from sleeve (1), then
remove seals (9) and (10), and O-ring (11). IDENTIFICATION OF
* After disassembling, if there is any abnormality PRESSURE COMPENSATION
in sleeve (1), piston (2), plug (4), ball (5), or
seals (6) and (7), replace the whole pressure
VALVE ASSEMBLY
compensation valve assembly.
Valves are identified by markings on the valve
assembly.
Type A - 1 mark.
Type C - 3 marks.
Type D - 4 marks.
Type B - 2 marks.
30-48
DISASSEMBLY AND ASSEMBLY PRESSURE COMPENSATION VALVE
30-49
DISASSEMBLY AND ASSEMBLY MAIN RELIEF VALVE
30-50
DISASSEMBLY AND ASSEMBLY MAIN RELIEF VALVE
• Before assembling coat the sliding surface with Nut: 58.8±4.9 Nm (6±0.5 kgm)
engine oil.
8. Tighten nut (4) to specified torque.
1. Install O-ring (17) and ring (16) to seat (15), and
assemble sleeve (11). Nut: 44.1±4.9 Nm (4.5±0.5 kgm)
2. Assemble sleeve (14) to sleeve (11). ★ After installing to the control valve assembly,
adjust the pressure.
3. Install nut (7) and O-ring (10) to holder (8), then For details, see TESTING AND ADJUST-
assemble retainer (9), poppet (13), and spring ING, Testing and adjusting oil pressure of
(12), and install to sleeve (11). work equipment, swing, travel circuits.
★ Set contact surface of seat (15) and poppet
(13) in position securely.
30-51
DISASSEMBLY AND ASSEMBLY LS CONTROL EPC VALVE
INSTALLATION OF LS CONTROL
EPC VALVE ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-52
DISASSEMBLY AND ASSEMBLY SOLENOID VALVE
INSTALLATION OF SOLENOID
VALVE ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-53
DISASSEMBLY AND ASSEMBLY PPC SHUTTLE VALVE
30-54
DISASSEMBLY AND ASSEMBLY PPC SHUTTLE VALVE
INSTALLATION OF PPC
SHUTTLE VALVE ASSEMBLY
• Carry out installation in the reverse order to removal.
• Check that the quick joint does not come out when
the hose is pulled.
30-55
DISASSEMBLY AND ASSEMBLY PPC SHUTTLE VALVE
1. Disconnection of valve
Remove mounting bolts (1), and disconnect shuttle
valve assembly (2), EPC/clamshell sol. valve and
plate (4).
30-56
DISASSEMBLY AND ASSEMBLY PPC SHUTTLE VALVE
30-57
DISASSEMBLY AND ASSEMBLY WORK EQUIPMENT • SWING PPC VALVE
REMOVAL OF WORK
EQUIPMENT • SWING PPC
VALVE ASSEMBLY
Lower the work equipment completely to the ground
and stop the engine. Then loosen the oil filler cap
solwly to release the pressure inside the hydraulic
tank.
INSTALLATION OF WORK
EQUIPMENT • SWING PPC
VALVE ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-58
DISASSEMBLY AND ASSEMBLY TRAVEL PPC PEDAL
1
3. Remove screws (1)
30-59
DISASSEMBLY AND ASSEMBLY BOOM CYLINDER
30-60
DISASSEMBLY AND ASSEMBLY BOOM CYLINDER
INSTALLATION OF BOOM
CYLINDER ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the cylinder. For details, see
TESTING AND ADJUSTING, Bleeding air from
hydraulic cylinder.
30-61
DISASSEMBLY AND ASSEMBLY ARM CYLINDER
30-62
DISASSEMBLY AND ASSEMBLY ARM CYLINDER
INSTALLATION OF ARM
CYLINDER ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the cylinder. For details, see
TESTING AND ADJUSTING, Bleeding air from
hydraulic cylinder.
30-63
DISASSEMBLY AND ASSEMBLY BUCKET CYLINDER
REMOVAL OF BUCKET
CYLINDER ASSEMBLY
Extend the bucket cylinder piston rod approx. 200
mm, lower the work equipment completely to the
ground, then set the safety lock lever to the LOCK
position.
30-64
DISASSEMBLY AND ASSEMBLY BUCKET CYLINDER
INSTALLATION OF BUCKET
CYLINDER ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the cylinder. For details, see
TESTING AND ADJUSTING, Bleeding air from
hydraulic cylinder.
30-65
DISASSEMBLY AND ASSEMBLY HYDRAULIC CYLINDER
DISASSEMBLY OF HYDRAULIC
CYLINDER ASSEMBLY
1. Piston rod assembly
1) Remove piping from cylinder assembly.
2) Remove mounting bolts, and disconnect head
assembly (1).
3) Pull out piston rod assembly (2).
★ Place a container to catch the oil under the
cylinder.
Unit: mm
Cylinder 1p
Arm Bucket
Model Boom
PW170-6 75 85 75
30-66
DISASSEMBLY AND ASSEMBLY HYDRAULIC CYLINDER
30-67
DISASSEMBLY AND ASSEMBLY HYDRAULIC CYLINDER
ASSEMBLY OF HYDRAULIC
CYLINDER ASSEMBLY
★ Be careful not to damage the packings, dust seals,
and O-rings.
★ Do not try to force the backup ring into position.
Warm it in warm water (50 - 60°C) before fitting it.
30-68
DISASSEMBLY AND ASSEMBLY HYDRAULIC CYLINDER
Nut:
PW170-6 420 ± 42 kgm 790 ± 25 kgm No nut 720 ± 72 kgm 420 ± 42 kgm
30-69
DISASSEMBLY AND ASSEMBLY HYDRAULIC CYLINDER
Mounting bolt:
Boom
Arm 330±10 Nm (33.7±1.0 kgm)
Bucket
30-70
DISASSEMBLY AND ASSEMBLY
REMOVAL OF WORK
EQUIPMENT ASSEMBLY
Extend the arm and the bucket fully and lower the
work equipment completely to the ground, then
operate the control levers 2 to 3 times.
600kg
30-71
DISASSEMBLY AND ASSEMBLY WORK EQUIPMENT
INSTALLATION OF WORK
EQUIPMENT ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the cylinder. For details, see
TESTING AND ADJUSTING, Bleeding air from
hydraulic cylinder.
30-72
DISASSEMBLY AND ASSEMBLY
씮
씮
Set the back of the bucket facing down, Release the remaining pressure in the
circuit. For details, see TESTING AND
씮
lower the work equipment completeley to
the ground, and operate the control levers ADJUSTING, Releasing pressure in
2 of 3 times. hydraulic circuit for machines with PPC
1. Remove lock bolt (1). (See F1) 1 valve.
2. Remove plate (2). (See F1) 2
3. Remove pin (3). (See F1) 3 4. Disconnect hoses (2). (See F4)
4. Remove lock bolt (4). (See F1) 4
5. Remove pin (5). (See F1) 5. Remove pin (3). (See F4)
6. Remove bucket assembly (6). (See F1)
★ Raise the work equipment and disconnect 6. Remove arm assembly (4). (See F4)
the arm from the bucket. ★ Raise the boom and disconnect the boom
from the arm.
600 kg
See Weight Table.
INSTALLATION OF BUCKET
INSTALLATION OF ARM
ASSEMBLY
ASSEMBLY
• Carry out installation in the reverse order to
removal. • Carry out installation in the reverse order to
removal.
1 4 1
★ Tighten with the locknut so that the
clearance between the bucket boss and When aligning the position of the pin hole,
nut is 0.5 - 1.5mm. (See F2) run the engine at low idling, and align
2 slowly.
★ Adjust the shim thickness so that the Never insert your fingers in the pin hole.
clearance between bucket boss (7) and
spacer (8) is 2mm. (See F3) • Bleeding air
3 ★ Bleed the air from the cylinder.
★ When aligning the position of the pin hole, For details, see TESTING AND ADJUST-
run the engine at low idling, and align ING, Bleeding air from hydraulic cylinder.
slowly. ★ After bleeding the air from the cylinder,
Never insert your fingers in the pin hole. check the level of the oil in the hydraulic
tank.
REMOVAL OF ARM
ASSEMBLY
1. Bucket assembly
For details, see REMOVAL OF BUCKET
ASSEMBLY.
30-73
DISASSEMBLY AND ASSEMBLY BOOM CYLINDER
F4 F1
F2
F3
30-74
DISASSEMBLY AND ASSEMBLY
INSTALLATION OF ARM,
BUCKET ASSEMBLY
• Carry out installation in the reverse order to removal.
• Bleeding air
★ Bleed the air from the cylinder.
For details, see TESTING AND ADJUSTING,
Bleeding air from hydraulic cylinder.
★ After bleeding the air from the cylinder, check
the level of the oil in the hydraulic tank.
30-75
DISASSEMBLY AND ASSEMBLY
F1
F2
30-76
DISASSEMBLY AND ASSEMBLY
F1
REMOVAL OF BOOM ASSEMBLY
1. Arm and bucket assembly
For details, see REMOVAL OF ARM, BUCKET
ASSEMBLY.
F4
30-77
DISASSEMBLY AND ASSEMBLY BOOM
INSTALLATION OF BOOM
ASSEMBLY
• Carry out installation in the reverse order to removal.
1
★ When tightening the locknut, tighten so that the
clearance between the plate and nut is 0.5 - 1.5
mm.
2
• Bleeding air
★ Bleed the air from the cylinder. For details, see
TESTING AND ADJUSTING, Bleeding air from
hydraulic cylinder.
30-78
DISASSEMBLY AND ASSEMBLY OPERATOR'S CAB
REMOVAL OF OPERATOR'S
CAB ASSEMBLY
Disconnect the table from the negative (-) terminal of
the battery.
30-79
DISASSEMBLY AND ASSEMBLY OPERATOR'S CAB
30-80
DISASSEMBLY AND ASSEMBLY OPERATOR'S CAB
INSTALLATION OF OPERATOR'S
CAB ASSEMBLY
• Carry out installation in the reverse order to removal.
30-81
DISASSEMBLY AND ASSEMBLY COUNTERWEIGHT
REMOVAL OF COUNTERWEIGHT
ASSEMBLY
1. Set lifting hook chains of counterweight assembly in
position, and sling.
2. Remove mounting bolts (2) and (3). 1
INSTALLATION OF
COUNTERWEIGHT ASSEMBLY
• Carry out installation in the reverse order to removal.
1
30-82
DISASSEMBLY AND ASSEMBLY PUMP CONTROLLER
INSTALLATION OF GOVERNOR,
PUMP CONTROLLER ASSEMBLY
• Carry out installation in the reverse order to removal.
30-83
DISASSEMBLY AND ASSEMBLY MONITOR PANEL
INSTALLATION OF MONITOR
PANEL ASSEMBLY
• Carry out installation in the reverse order to removal.
30-84
DISASSEMBLY AND ASSEMBLY
30-85
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
Note
STEP 1
Unscrew the draining plug M18x1,5 (pos. 9) and its washer
(pos. 8) from the gearbox housing (pos. 7) and drain the oil
from the gearbox.
30-86
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 2
Remove the extentions (pos. 10), the elbow (pos. 11) and
the washer (pos. 8) from the gearbox housing (pos. 7).
STEP 3
Unscrew the plug G1/4 (pos. 47) from the motor adaptor
(pos. 50)
STEP 4
Unscrew the elbow (pos. 46) from the motor adaptor (pos.
50).
30-87
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 5
Unscrew the dipstick for oil filling and level kit (pos. 52).
STEP 6
Unscrew the 8 socket head screws M10x30 (pos. 48)
grade 8.8, fixing the motor adaptor (pos. 50) to the brake
housing (pos. 32).
STEP 7
Remove the 8 socket head screws (pos. 48), the bracket of
oil filling and level kit (pos. 52) and remove the motor adap-
tor (pos. 50).
30-88
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 8
Remove the O-ring (pos. 44) from its seat in the motor
adaptor (pos. 50).
STEP 9
Unscrew the 11 socket head screws M10x70 (pos. 33)
grade 8.8 and remove the brake assembly.
STEP 10
Overturn the brake assembly and remove the O-ring (pos.
24) from its seat in the break housing (pos. 33).
30-89
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 11
Remove the brake shaft (pos. 35).
STEP 12
Remove the toothed ring (pos. 25).
STEP 13
Remove the 1st stage sun gear (pos. 27).
30-90
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 14
Remove th 1st reduction assembly (pos. 26).
STEP 15
Remove the O-ring (pos. 24) from its seat in the cover (pos.
21).
STEP 16
Using pliers remove the elbow and the extension of the oil
filling and level kit (pos. 52) from the cover (pos. 21) and all
plugs and washers present in the gearbox too.
30-91
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 17
Unscrew the 4 socket head screws M12x80 (pos. 22),
grade 12.9, and the 12 socket head screws M12x90 (pos.
23), grade 12.9, and remove the cover (pos. 21).
STEP 18
Remove the O-ring (pos. 12) from its seat in the end cover
(pos. 21).
STEP 19
Remove the 2nd stage sun gear (pos. 19).
30-92
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 20
Remove the 2nd reduction assembly (pos. 17).
STEP 21
Remove the toothed ring (pos. 18).
STEP 22
Remove the O-ring (pos. 12) from its seat in the gearbox
housing (pos. 7).
30-93
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
Note
STEP 23
By means of a punch, remove the caulking in the edge of
the nut (pos. 15).
STEP 24
Using the tool AT709C06, unscrew the nut M75x2 (pos.
15).
30-94
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 25
Overturn the output assembly (pos. 16), unscrew and re-
move the 8 socket head screws M8x20 (pos. 4), grade 8.8,
from the front cover (pos. 5)
STEP 26
Place the gearbox housing (pos. 7) on three spacers and
through a press push on the pinion shaft (pos. 1) and re-
move it from the gearbox housing (pos. 7).
STEP 27
Place the pinion shaft (pos. 1), front cover (pos. 5) and
bearing (pos. 6) group on a spacer.
Through a press push on the pinion shaft (pos. 1) and ex-
tract the bearing (pos. 6).
30-95
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 28
Remove the front cover (pos. 5).
STEP 29
Use a screwdriver to remove the ringseals (pos. 3) from
their grove in the front cover (pos. 5)
STEP 30
Use a rubber hammer a metal stopper to remove the bear-
ing (pos. 14) from the the gearbox housing (pos. 7).
30-96
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 31
Use a rubber hammer a metal stopper to remove the seal
ring (pos. 13). from the the gearbox housing (pos. 7).
Important
STEP 32
Through a press and a metal stopper, push on the spring
retainer (pos. 42), thus removing the force of the springs
(pos. 41) on the circlip (pos. 43) and through pliers remove
it.
STEP 33
Remove the springs retainer (pos. 42).
30-97
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 34
Remove the springs (pos. 41) from their groves in the
brake piston (pos. 40).
STEP 35
Remove the brake piston (pos. 40).
To get it easier, pumping compressed air into the brake
port hole (max. 0,2 bar), taking care the piston (pos. 40)
doesn't jump out the brake housing (pos. 32).
STEP 36
Remove the 1 st O-rings (pos. 34) from its seat in the brake
housing (pos. 32).
30-98
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 37
Remove spacer (pos. 38) and remove the 2nd O-rings
(pos. 34) from its grove in the brake housing (pos. 32).
STEP 38
Remove the O-ring (pos. 39) from its seat in the spacer
(pos. 38).
STEP 39
Remove brake discs pack (pos. 36-37).
30-99
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 40
Through pliers remove the circlip (pos. 29) from its grove in
the brake housing (pos. 32).
STEP 41
Remove the discs retainer (pos. 30)
Note
The gearbox disassembling ends with the above operation:
all items are now available for the necessary inspections.
30-100
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
4. ASSEMBLY
4.1 IMPORTANT NOTES BEFORE THE AS-
SEMBLING
When proceeding with the gearbox reassebly, it is neces-
sary to follow up the rules listed below:
STEP 42
Place correctly the spacer (pos. 2) on th pinion shaft (pos.
1).
STEP 43
Through a press and a metal stopper push the spacer
(pos. 2) against the shoulder on the pinion shaft (pos. 1)
untill assembling is complete.
30-101
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 44
Mount the seal ring (pos. 3) into its grove in the front cover
(pos. 5).
STEP 45
Mount the front cover (pos. 5) on the pinion shaft (pos. 1).
STEP 46
Apply on the bearing (pos. 6) a coat of grease type NGLI 2
with EP characteristics.
30-102
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 47
Place the bearing (pos. 6) on the pinion shaft (pos. 1).
Through a press and a metal stopper, push the bearing
(pos. 6) against the spacer shoulder (pos. 2).
STEP 48
Pace the seal ring (pos. 13) inside the gearbox housing
(pos. 7).
STEP 49
Through a press and the proper metal stopper AT709C14,
push the seal ring (pos. 13) against the shoulder on the
gearbox housing (pos. 7).
30-103
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 50
Overturn the gearbox housing (pos. 7) and fill with grease
type NGLI 2 with EP characteristics the upper chamber
placed between the seal ring (pos. 13) and the bearing
(pos. 6).
STEP 51
Place the pinion shaft (pos. 1) -spacer (pos. 2) -front cover
(pos. 5) -bearing (pos. 6) group in the gearbox housing
(pos. 7).
STEP 52
Usa a press and a proper metal stopper to push the pinion
shaft (pos. 1) against the shoulder on the gearbox housing
(pos. 7 until assembling of the unit is complete.
30-104
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 53
Tighten the 6 socket head screws M8x20 (pos. 4), grade
8.8, by a torque wrench at a torque of 2,5 daNm.
STEP 54
Overturn the gearbox (pos. 7) and place inside it the bear-
ing (pos. 14).
STEP 55
Use a press and the metal stopper to push the bearing
(pos. 14) against the shoulder in the gearbox housing (pos.
7).
30-105
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 56
Place a new ring nut (pos. 15) on the pinion shaft (pos. 1).
Never use the nut disassembled because already de-
formed.
STEP 57
Use the tool AT709C06 to tighten the ring nut M75x2 (pos.
15), by a torque wrech, at a torque of 110-120 daNm.
STEP 58
Caulk the ring nut (pos. 13) next to 3 spaces placed at 120°
of the pinion shaft spline (pos. 1).
30-106
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 59
Apply in the O-ring's seat in the gearbox housing (pos. 7) a
coat of grease.
Mount the 1st O-ring (pos. 12).
STEP 60
Assemble the 2nd reduction assembly (pos. 17).
STEP 61
Insert the 2nd stage sun gear (pos. 19).
30-107
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 62
Assemble the toothed ring (pos. 18).
STEP 63
Apply in the O-ring's seat in the cover (pos. 21) a coat of
grease.
Mount the 2nd O-ring (pos. 12).
STEP 64
Place the cover (pos. 21) on the toothed ring (pos. 18) and
fix it through 4 socket head screws M12x80 (pos. 22),
grade 8.8, and through 12 socket head screws M12x90
(pos. 23), grade 8.8, tightened by a torque wrench at 12
daNm torque.
30-108
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
DISASSEMBLING
STEP 65
Apply in the O-ring's seat in the cover (pos. 17) a coat of
grease.
Mount the 1st O-ring (pos. 24).
STEP 66
Assemble the 1st reduction assembly (pos. 26).
STEP 67
Insert the 1st stage sun gear (pos. 27).
30-109
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 68
Assemble the toothed ring (pos. 25).
STEP 69
Apply in the internal seal's groves of the brake housing
(pos. 32) a coat of grease, and insert the O-rings (pos. 34).
STEP 70
Apply in the inside surface of the spacer (pos. 38) a coat of
grease.
Fit the O-ring (pos. 39) into its seat in the spacer (pos. 38).
30-110
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 71
Assemble corectly the spacer (pos. 38) to the brake piston
(pos. 40), paying attention not to damage the O-ring (pos.
39) already fitted.
STEP 72
Insert the brake piston-spacer group (pos. 40-38) inside
the brake housing (pos. 32), paying attention not to dam-
age the seals already fitted.
STEP 73
Insert the springs (pos. 41) into the holes in the brake pis-
ton (pos. 40), according the picture arangement.
30-111
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 74
Insert the springs retainer (pos. 42).
STEP 75
Through a press and a metal stopper, push on the springs
retainer (pos. 42), in lowering it in order to permit the as-
sembly of the circlip (pos. 43) in its grove in the brake hous-
ing (pos. 32).
STEP 76
Overturn the brake housing (pos. 32) and assemble the
brake discs package according to the following order:
firstly insert an external toothed sintered bronze disc (pos.
37).
30-112
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 77
Then insert, an internal toothed steel disc (pos. 36).
Repete the operation untill reaching the number of 6
sintered bronze and 5 stell discs.
STEP 78
Assemble the brake shaft (pos. 35) and insert oil at a pres-
sure of 20 bar from the brake pilot port (see installation
drawing ref. 4) in order to permit the assembling of the last
sintered bronze disc (pos. 37) and the discs retainer (pos.
30).
STEP 79
Assemble correctly the discs retainer (pos. 30) in the brake
housing (pos. 32).
30-113
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 80
Through pliers, assemble the circlip (pos. 29) into its grove.
Then remove the compressed air from the brake assembly
and dismount the brake shaft (pos. 35).
STEP 81
Apply in the O-ring's seat in the brake housing (pos. 32) a
coat of grease.
Mount the 2nd O-ring (pos. 24).
STEP 82
Assemble the brake shaft (pos. 35).
30-114
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 83
Assemble the brake assembly.
STEP 84
Tighten the 11 socket head screws M10x70 (pos. 33),
grade 8.8, by a torque wrench at 5 daNm torque.
STEP 85
Mount the O-ring (pos. 44) into its seat in the motor flange
(pos. 50).
30-115
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 86
Place the motor flange (pos. 50) on the brake housing (pos.
32) and insert the 8 socket head screws M10x30 (pos. 48)
grade 8.8.
Contemporary assemble the flask of the filling and oil level
kit (pos. 52).
STEP 87
Tighten the 8 socket head screws M10x30 (pos. 48), grade
8.8, by a torque wrench at 5 daNm torque.
STEP 88
Using pliers, screw the washer (pos. 8), the elbow and the
extension of the filling and oil level kit (pos. 52) in the cover
(pos. 21).
30-116
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 89
Mount and tighten the dipstick of the filling and oil level kit
(pos. 52).
STEP 90
Insert and screw all plugs M18x1,5 (pos. 9) and washers
(pos. 8) in the gearbox.
STEP 91
Assemble the angle (pos. 46) in the motor flange (pos. 50).
30-117
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 92
Assemble the breather plug G1/4 (pos. 47).
STEP 93
Asemble the extensions (pos. 10), the angle (pos. 11) and
the washer (pos. 8) in the gearbox housing (pos. 7).
STEP 94
Assemble the plug M18x1,5 (pos. 9).
30-118
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
ASSEMBLING
STEP 95
Important
After mounting the hydraulic motor, verify, through a depth
slide gauge, the axial dimension of the gearbox measured
by input side of the motor adaptor (pos. 50) to the brake
shaft (pos. 35).
Axial dimension = 93-94,5 mm.
STEP 96
After having reassebled the gearbox, fit the hydraulic motor
(taking care to include the O-ring pos. 51), throurgh 2 fixing
screws M16x40 (pos. 49), grade 8.8 tightened at a torque
of 21,5 daNm. Fill the gearbox with the lubricant oil as
shown in section 4.2.
30-119
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
5. BRAKE CHECK
In order to verify the correct assembly of the brake group, it
is necessary to carry out a test of the seal rings. Connect
the brake port to a pump and release the brake by pumping
oil. By means of a pressure gauge verify that the pressure
does not decrease (see dwg. 6). In Otherwise case, the
seal rings of the brake leak oil and it is necessary to disas-
sembly the brake and provide for their replacement.
30-120
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
30-121
DISASSEMBLY AND ASSEMBLY SWING MACHINERY
30-122
DISASSEMBLY AND ASSEMBLY TRANSMISSION
O-ring
Ensure adequate lubrication of these seals before
inserting them in their seats to avoid twisting during
shaft assembly.
Shims
For each adjustment select the correct shims by indi-
vidual measurements. Do not trust pack measure-
ments or the thickness indicated on the shim.
Bearings
For a correct assembly it is suggested to warm them
in a furnace from 80C to 90C before installation in
their respective shafts or to cool them before insert-
ing in their respective seats woth outer housing.
Sealing
Use LOCTITE 510 or types following the
sepcifications. Ensure that both sides to be sealed
are clean, dry and totally free from grease and oil.
30-123
DISASSEMBLY AND ASSEMBLY TRANSMISSION
EMERGENCY BRAKE
(Refer to page 30-49)
• Unscrew the screw (1), remove the washer (2) and the
flange (3).
• Unscrew the screws (7) and remove the brake cylidner
(8).
• Keep the brake piston (20) and the seal rings (16-17-
18-19); replace if necessary.
• Keep the three trust pins (6) and the O-rings; replace if
necessary
• Do not operate on the screws (5) and the nuts (4), but
only in the event of brake release manual intervention.
In this case carry out theadjustment setting the screws
in touch with the pins (6), then unscrew 1 turn and lock
with the counternut (4).
• Check the brake drum (13) and the reaction plate (14)
are not worn out.
SPECIAL TOOLS
• Driver for oil seal (9): ref. 119038
• Interchangeable handle: ref. 119033
30-124
DISASSEMBLY AND ASSEMBLY TRANSMISSION
30-125
DISASSEMBLY AND ASSEMBLY TRANSMISSION
• Unscrew the screw (6) and extract the fork control le-
ver (8).
• Remove the stop ring (13), then axtract the fork (9),
shaft (15) and sleeve (11) group.
30-126
DISASSEMBLY AND ASSEMBLY TRANSMISSION
30-127
DISASSEMBLY AND ASSEMBLY TRANSMISSION
FLANGE POSITIONING
• The motion output flange for forward axle (1) must be
mounted by using some adjustment thickness (2) be-
tween washer (3) and shaft (4) in order to assure a
right assembly.
TIGHTENING TORQUES
(Refer to page 53)
Thread Nm
1 Screw-fork to shaft - 32
2 Screw-output flanges M12x25 139
3 Brake release nut-screw M10x20 50
4 Front cover-screw M10x90 50
5 Rear cover-screw M10x30 50
6 Fork control screw-lever M10x20 50
7 Half-housing fastening screw M10x65 50
8 Breather M10 10
9 Oil drain, filling and level plug M22 60
30-128
DISASSEMBLY AND ASSEMBLY TRANSMISSION
30-129
DISASSEMBLY AND ASSEMBLY FRONT AXLE
• Lubricate the seal lip (oil is better than grease) Unscrew the fastening nuts and remove the wheels
and fill with grease the space between oil lip and from the hubs.
dust lip of dual lip seals.
Disconnect the controlling brakes pipings, then in-
• Instal the oil seal using a suitable seal driver. stall some protection plugs.
Avoid hammering directly on the seal.
Loose al lthe remaining connections between frame
• To avoid damages to the seal lip caused by the and axle, then seperate the axle from the frame
shaft; adequatly protect the same during shaft structure.
assembly procedure.
Installing the axle reverse the order; check for even-
O-ring tual leakes of oil.
Ensure adequate lubricatoin of these seals before
inserting them in their seats to avoid twisting during Check the oil level and, if necessary, re-fill.
shaft assembly.
Carry out the braking system bleeding.
Shims
For each adjustment select the correct shims by indi-
vidual measurements. Do not trust pack measure-
ments or the thickness indicated on the shim.
Bearings
For a correct assembly it is suggested to warm them
in a furnace from 80C to 90C before installing in their
respective shafts or to cool them before inserting in
their respective seats with outer housing.
Elastic plugs
During the plug assembly and with turbo off, ensure
that their notch has oriented towards the stress
which is subjecting the thrust.
30-130
DISASSEMBLY AND ASSEMBLY FRONT AXLE
FINAL DRIVES
• Turn the wheel hub and position the plug (1) to the
upper point. Fill it with specified oil.
30-131
DISASSEMBLY AND ASSEMBLY FRONT AXLE
• Remove the ring (1), the reaction plate (2), the brake
disc (3) and the reaction plate (4).
• Check the reaction plates (2) and (4) do not show any
signs of excessive wear o grooves exceeding 0.20
mm.
30-132
DISASSEMBLY AND ASSEMBLY FRONT AXLE
A = 51.95 to 52.00
B = 114.175 to 114.225
C = 29.00 to 29.15
D = 3.95 to 4.00
30-133
DISASSEMBLY AND ASSEMBLY FRONT AXLE
SWIVEL HOUSING
30-134
DISASSEMBLY AND ASSEMBLY FRONT AXLE
30-135
DISASSEMBLY AND ASSEMBLY FRONT AXLE
DRIVE SHAFTS
30-136
DISASSEMBLY AND ASSEMBLY FRONT AXLE
Steering cylinder • Check for the distance (M) is the same both
• Inspect the steering cylinder rod (1) and its pis- side.
ton for wear or damages.
• When the final adjustment is reached, lock the
• Inspect the ball joints assy (2) and (3) for wear nuts (4) and (5) to 300 Nm.
or damages.
Toe-in
• The toe-in value has to be of +1 to -1 mm.
30-137
DISASSEMBLY AND ASSEMBLY FRONT AXLE
• Unscrew the screw (1) and the bolts (10) to dis- • Check the oil seal (8) conditions, best replace it.
assemble the complete differential and to be When reassembling, fill with grease the oil seal.
able to work on bench.
The operations to carry out on this group are the fol-
• Check the conditions of the bevel pinion bear- lowing ones:
ings (2) and of the differential bearings (3);
repplace them, if necessary. PINION POSITIONING
PINION BEARINGS PRE-LOAD
• If you change the bevel gear and the pinion set, PINION-CROWN TEETH BACKLASH
you have to replace the ring nut (4), the washers DIFFERENTIAL BEARINGS PRE-LOAD
(5) and (6) and the collapsible spacer (7). ADJUSTMENT FLANGE ON PINION
30-138
DISASSEMBLY AND ASSEMBLY FRONT AXLE
PINION POSITIONING
Bevel distance
• Install the pinion bearings in their seat in the differen-
tial end plate and put them in contact using the tool (1);
it must be possible turn the conical bearings by hand,
never close tight.
30-139
DISASSEMBLY AND ASSEMBLY FRONT AXLE
30-140
DISASSEMBLY AND ASSEMBLY FRONT AXLE
• Turn the other ring nut clockwise, and at the same time
use a plastice hammer in order to eliminate any bear-
ing backlash. You can get such a condition when the
ring nut rotation becomes difficult.
DIFFERENTIAL BEARINGS
PRE-LOAD
To carry out the adjustment operate as follows:
• With the crown engaged to the pinion, and having ob-
tained the correct backlash between pinion and bevel
gear, turn the pinion by using a dynanometer with the
string wrapped around the queue of the pinion itself.
Measure the value of the stress necessary to rotate
both the pinion and the differential simultaneously.
T = (P + 29) to (P + 44) N
30-141
DISASSEMBLY AND ASSEMBLY FRONT AXLE
30-142
DISASSEMBLY AND ASSEMBLY FRONT AXLE
DIFFERENTIAL
30-143
DISASSEMBLY AND ASSEMBLY FRONT AXLE
AXLE BEAM
• Inspect the drive shaft bushing (3) for wear and dam-
ages; replace, if necessary.
30-144
DISASSEMBLY AND ASSEMBLY FRONT AXLE
30-145
DISASSEMBLY AND ASSEMBLY FRONT AXLE
30-146
DISASSEMBLY AND ASSEMBLY FRONT AXLE
TIGHTENING TORQUES
Thread Nm
1 Ring nut - bevel pinion M45x1.5 pre-load
2 Bolt - bevel pinion cover M8x25 27
3 Bolt - input flange to bevel pinion M12x1.25 139
4 Bolt - input flange M12x1.25 -
5 Bolt - differential support to axle housing M12x33 150
6 Bolt - crown wheel to differential carrier M14x2 190
(use locite 270)
7 Breather support - 15
8 Breather plug M10x1 5
9 Bolt - ring nut locking plate M6x1x10 13
10 Oil drain and filling plug M22x1.5 60
11 Bolts - differential support to axle housing M12 80
12 Bolt - differential support half-tie M16x95 413
13 Brake fluid breather plug - 12 to 16
14 Greaser M10x1 10
15 Bolt - pivot support M14x35 190
16 Lock nut for steering-stop screw M14 100
17 Oil plug - 60
18 Screw - pivot shaft lock M16x2 156
19 Screw - steering cylinder M16x55 240
20 Steering rod lock nuts:
- R.H. thread M36x1.5 300
- L.H. thread M36x1.5 300
21 Bolts - planetary gear carrier M20x80 530
22 Bolts - crown gear carrier to wheel hub M14x1.5 220
23 Bolts - planetary carrier to wheel shaft M8x20 23
24 Oil filing level plug - 60
30-147
DISASSEMBLY AND ASSEMBLY REAR AXLE
Bearings
For a correct assembly it is suggested to warm them
in a furnace from 80°C to 90°C before installation in
their respective shafts or to cool them before insert-
ing in ther respective seats with outer housing.
Elastic plugs
During the plug assembly and with turbo off ensure
that their notch has oriented towards the stress wich
is subjecting the trust.
30-148
DISASSEMBLY AND ASSEMBLY REAR AXLE
FINAL DRIVES
• Turn the wheel hub and position the plug (1) to the
upper point. Fill it with specified oil.
30-149
DISASSEMBLY AND ASSEMBLY REAR AXLE
WHEEL HUBS
30-150
DISASSEMBLY AND ASSEMBLY REAR AXLE
A = 68.95 to 69.00
B = 132.175 to 132.225
C = 29.00 to 29.15
D = 4.95 to 5.00
30-151
DISASSEMBLY AND ASSEMBLY REAR AXLE
BRAKES
• Check the brake piston (4) and the reaction plate (5)
do not show and signs of excessive wear o grooves
exceeding 0.20 mm.
30-152
DISASSEMBLY AND ASSEMBLY REAR AXLE
• Unscrew the screw (1) and the bolts (10) to dis- • Check the oil seal (8) conditions, best replace it.
assemble the complete differential and to be When reassembling, fill with grease the oil seal.
able to work on bench. The operations to carry out on this group are the
following ones;
• Check the conditions of the bevel pinion bear-
ings (2) and of the differential bearings (3); re- PINION POSITIONING
place them, if necessary. PINION BEARINGS PRE-LOAD
PINION - CROWN TEETH BACKLASH
• If you change the bevel gear and the pinion DIFFERENTIAL BEARINGS PRE-LOAD
bearings (2) and of the differential bearings (3); ADJUSTMENT FLANGE ON PINION
replace them, if necessary.
30-153
DISASSEMBLY AND ASSEMBLY REAR AXLE
PINION POSITIONING
Bevel distance
• Install the pinion bearings in their seat in the differen-
tial end plate and put them in contact using the tool (1);
it must be possible turn the conical bearings by hand,
never close tight.
30-154
DISASSEMBLY AND ASSEMBLY REAR AXLE
30-155
DISASSEMBLY AND ASSEMBLY REAR AXLE
• Turn the other ring nut clockwise, and at the same time
use a plastic hammer in order to eliminate any bearing
backlash. You can get such a condition when the ring
nut rotation becomes difficult.
T = (P+29) to (P+44) N
30-156
DISASSEMBLY AND ASSEMBLY REAR AXLE
30-157
DISASSEMBLY AND ASSEMBLY REAR AXLE
DIFFERENTIAL
30-158
DISASSEMBLY AND ASSEMBLY REAR AXLE
AXLE BEAM
30-159
DISASSEMBLY AND ASSEMBLY REAR AXLE
30-160
DISASSEMBLY AND ASSEMBLY REAR AXLE
TIGHTENING TORQUES
Thread Nm
DIFFERENTIAL CASE
1 Ring nut - bevel pinion M45x1.5 pre-load
2 Bolt - bevel pinion cover M8x25 27
3 Bolt - input flange to bevel pinion M12x1.25 139
4 Bolt - input flange M12x1.25 -
5 Bolt - differential support to axle housing M12x33 150
6 Bolt - crown wheel to differential carrier M14x2 190
(use loctite 270)
7 Oil breather extension - 15
8 Breather plug M10x1 5
9 Bolt - ring nut locking plate M6x1.x10 13
10 Oil drain and filling plug M22x1.5 60
11 Oil drain plug M16x1.5 30
12 Bolts - differential support to axle housing M12 80
13 Bolt - differential support half-tie M16x95 413
14 Oil breather extension - 90
15 Breather plug - 8 to 12
WHEEL SHAFT AND FINAL DRIVE
16 Bolts - wheel shaft to axle beam M14 190
17 Bolts - planetary gear carrier M20x80 530
18 Bolts - crown gear carrier to wheel hub M14x1.5 220
19 Bolts - planetary carrier to wheel shaft M8x20 23
20 Oil filling level plug - 60
30-161
DISASSEMBLY AND ASSEMBLY ADAPTER WELDING INSTRUCTION - ELECTRODE WELDING
ADAPTER WELDING
INSTRUCTION - ELECTRODE
WELDING
BE SAFE!
When performing the procedures described in this
catalog, you should WEAR OSHA-approved hard hat,
safety glasses, work gloves and safety shoes.
IMPORTANT!
ESCO weld-on Helilok adapters are hardened typically to
415BHN. In order to eliminate cracking commonly associ-
ated with welding steel at these hardness levels, follow
these procedures carefully and employ good welding tech-
niques and practices.
30-162
DISASSEMBLY AND ASSEMBLY ADAPTER WELDING INSTRUCTION - ELECTRODE WELDING
30-163
DISASSEMBLY AND ASSEMBLY ADAPTER WELDING INSTRUCTION - ELECTRODE WELDING
30-164
DISASSEMBLY AND ASSEMBLY OUT RIGGER CYLINDER
8) Remove cylinder.
30-165
DISASSEMBLY AND ASSEMBLY BLADE CYLINDER
BLADE CYLINDER
REMOVAL OF BLADE CYLINDER
7) Remove cylinder.
30-166
MAINTENANCE STANDARD
40 MAINTENANCE STANDARD
40-1
MAINTENANCE STANDARD ENGINE MOUNT
ENGINE MOUNT
Unit: mm
40-2
MAINTENANCE STANDARD SWING MACHINERY
SWING MACHINERY
40-3
Standard Clearance limit Check measurement standard
Pos. Check item Component Check measurement limit (mm)
clearance (mm) (mm) (mm)
40-4
Measurement over pin ø4mm
Motor Shaft: Measurement over pin ø4mm 33,90
Backlash between motor shaft 34,144 -0,054 -0,120
1 0,064- 0,155 0,33
and brake shaft Measurement over pin ø3,5mm
Brake shaft: Measurement over pin ø3,5mm 22,85
22,484 +0,171 +0,063
Measurement over pin ø3,5mm
Brake shaft: Measurement over pin ø3,5mm 32,89
Backlash between brake shaft 32,611 +0,101 +0,001
2 0,020 - 0,098 0,27
and 1st stage sun gear Measurement over pin ø3,5mm
Sun gear: Measurement over pin ø3,5mm 43,10
43,311 -0,030 -0,076
Span measurement over 4 teeth
Sun gear: Span measurement over 4 teeth 27,52
MAINTENANCE STANDARD
Unit: mm
40-5
MAINTENANCE STANDARD CONTROL VALVE
CONTROL VALVE
40-6
MAINTENANCE STANDARD CONTROL VALVE
Unit: mm
40-7
MAINTENANCE STANDARD CONTROL VALVE
Unit: mm
40-8
MAINTENANCE STANDARD CONTROL VALVE
40-9
MAINTENANCE STANDARD CONTROL VALVE
40-10
MAINTENANCE STANDARD CONTROL VALVE
Unit: mm
40-11
MAINTENANCE STANDARD CONTROL VALVE
40-12
MAINTENANCE STANDARD CONTROL VALVE
40-13
MAINTENANCE STANDARD SUCTION-SAFETY VALVE
SUCTION-SAFETY VALVE
Unit: mm
40-14
MAINTENANCE STANDARD SWING MOTOR
SWING MOTOR
40-15
MAINTENANCE STANDARD WORK EQUIPMENT, SWING PPC VALVE
Unit: mm
40-16
MAINTENANCE STANDARD PPC SHUTTLE VALVE, TRAVEL JUNCTION VALVE
40-17
MAINTENANCE STANDARD EPC SOLENOID VALVE
Unit: mm
40-18
MAINTENANCE STANDARD CENTER SWIVEL JOINT
Unit: mm
40-19
MAINTENANCE STANDARD ARM, BOOM SAFETY VALVE
Unit: mm
40-20
MAINTENANCE STANDARD HYDRAULIC CYLINDER
HYDRAULIC CYLINDER
PW170ES-6K
Unit: mm
40-21
MAINTENANCE STANDARD WORK EQUIPMENT
WORK EQUIPMENT
PW170ES-6K
40-22
MAINTENANCE STANDARD WORK EQUIPMENT - ONE PIECE BOOM
40-23
MAINTENANCE STANDARD WORK EQUIPMENT - TWO PIECE BOOM
40-24
MAINTENANCE STANDARD WORK EQUIPMENT
Unit: mm
40-25
MAINTENANCE STANDARD DIMENSIONS OF WORK EQUIPMENT
1. ARM
40-26
MAINTENANCE STANDARD WORK EQUIPMENT
No.
+1.0 +1.0
2 98xxxx96
0 ± 1.2 98xxxx96
0
± 1.2
+0.5 -0.3 +0.5
3 284 0 /
-0.8 284 0 / -0.3
-0.8
5 395.8 ± 2 399.5 ± 2
6 203.8 ± 1 173.8 ± 1
8 2995.3 3357.6 ± 3
13 400.8 400.8
14 (1348) (1348)
16 311.5 ± 1 311.5 ± 1
+0.2 +0.2
17 ø70 0 / -0.030
-0.076 ø70 0 / -0.030
-0.076
0 0
Arm as individual part 276 -0.5
276 -0.5
18
When press fitting bushing 310 310
40-27
MAINTENANCE STANDARD WORK EQUIPMENT
1. BUCKET
40-28
MAINTENANCE STANDARD WORK EQUIPMENT
Model PW170ES-6k
No.
3 103° 23'
4 400
5 1348
7 -
+0.3
9 ø70 +0.2
+0.2
10 311.5 0
11 50
12 96
+1
13 440 0
14 ø18
15 ø130
16 ø130
+0.1
17 440 0
18 ø18
19 R95
20 R95
+0.2
21 311.5 0
22 96
40-29
MAINTENANCE STANDARD DOZER BLADE AND OUTRIGGERS HYDRAULIC CYLINDERS
Unit: mm
40-30
MAINTENANCE STANDARD OUTRIGGER BUSH PINS
Unit: mm
40-31
MAINTENANCE STANDARD TRANSMISSION
TRANSMISSION
1. Oil filling 60 ± 6Nm (6.1 ± 0.61 kgm)
2. Oil level 60 ± 6Nm (6.1 ± 0.61 kgm)
3. Oil drain 60 ± 6Nm (6.1 ± 0.61 kgm)
4. Oil brake connection port 137 ± 53Nm (14.0 ± 6 kgm)
5. Oil breather 10 ± 1.5Nm (1.0 ± 0.15 kgm)
LUBRICATION
Filling: use oil SAE 85W-140 that meets the specification SAE-J306C, API GL5
40-32
MAINTENANCE STANDARD FRONT AXLE
FRONT AXLE
1. Wheel hubs drain, filling and level plug 60 ± 6Nm (6.1 ± 0.61 kgm)
2. Differential oil filling and level plug 60 ± 6Nm (6.1 ± 0.61 kgm)
3. Differential drain plug 60 ± 6Nm (6.1 ± 0.61 kgm)
4. Brake control fluid inlet port 14 ± 2Nm (1.4 ± 0.15 kgm)
5. Brake circuit bleeding 14 ± 2Nm (1.4 ± 0.15 kgm)
6. Axle beam oil breather 5 ± 1Nm (0.51 ± 0.5 kgm)
7. Lubrication point 10 ± 1.5Nm (1.0 ± 0.15 kgm)
8. Steering cylinder feeding 240 ± 30Nm (24.5 ± 3.06 kgm)
LUBRICATION GREASING
Filling: use oil SAE 80W-90 that meets the specifica- Use lithium gun grease with molybdenum bisuphide
tion SAE-J306C, API GL5 Applications: every 250 hours.
40-33
MAINTENANCE STANDARD REAR AXLE
REAR AXLE
1. Wheel hubs drain, filling and level plug 60 ± 6Nm (6.1 ± 0.61 kgm)
2. Differential oil filling and level plug 60 ± 6Nm (6.1 ± 0.61 kgm)
3. Differential drain plug 60 ± 6Nm (3.1 ± 0.4 kgm)
4. Brake control liquid inlet port 14 ± 2Nm (1.4 ± 0.15 kgm)
5. Brake circuit bleeding 10 ± 2Nm (0.98 ± 0.2 kgm)
6. Axle beam oil breather 5 ± 1Nm (0.51 ± 0.1 kgm)
40-34
MAINTENANCE STANDARD ARM ROTATION CIRCLE
Unit: mm
40-35
MAINTENANCE STANDARD
40-36