Kubota LA344 Workshop Manual

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WORKSHOP MANUAL
FRONT LOADER
LA344,LA344S
KiSC issued 02, 2017 A

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TO THE READER
This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of KUBOTA
Front Loader LA344 and LA344S. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing".
INFORMATION
This section primarily contains information below.
• Safety First
• Safety Decal
• Specification
• Dimensions
GENERAL
• Loader Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
MECHANISM
This section contains information on the structure and the function of the unit. Before you continue with the
subsequent sections, make sure that you read this section.
SERVICING
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing
All illustrations, photographs and specifications contained in this manual are of the newest information available at the
time of publication.
KUBOTA reserves the right to change all information at any time without notice.
Since this manual includes many models, information or illustrations and photographs can show more than one
model.
February, 2017
© KUBOTA Corporation

CONTENTS
1. INFORMATION
SAFETY FIRST..................................................................................................................................................1-1
1. Before you start service ............................................................................................................................ 1-1
2. Start safely................................................................................................................................................1-1
3. Operate safely ..........................................................................................................................................1-2
4. Prevent a fire ............................................................................................................................................1-2
5. Keep a good airflow in the work area ....................................................................................................... 1-3
6. Discard fluids correctly ............................................................................................................................. 1-3
7. Prevent acid burns....................................................................................................................................1-3
8. Prepare for emergencies .......................................................................................................................... 1-3
SAFETY DECALS..............................................................................................................................................1-5
1. Safety decals ............................................................................................................................................1-5
2. Care of danger, warning, and caution labels ............................................................................................ 1-8
TERMINOLOGY.................................................................................................................................................1-9
1. Loader terminology ...................................................................................................................................1-9
SPECIFICATIONS ........................................................................................................................................... 1-11
1. Specifications for loader ......................................................................................................................... 1-11
2. Specifications for bucket......................................................................................................................... 1-11
3. Dimensional specifications ..................................................................................................................... 1-12
4. Operational specifications ...................................................................................................................... 1-13
2. GENERAL
IDENTIFICATION...............................................................................................................................................2-1
1. Loader identification .................................................................................................................................2-1
GENERAL PRECAUTIONS ...............................................................................................................................2-3
LUBRICATING SYSTEM ...................................................................................................................................2-5
1. Lubricants .................................................................................................................................................2-5
TIGHTENING TORQUES ..................................................................................................................................2-7
1. General use screws, bolts, and nuts ........................................................................................................ 2-7
2. Stud bolts..................................................................................................................................................2-7
3. American standard screws, bolts and nuts with UNC or UNF threads ..................................................... 2-8
4. Plugs and grease fittings .......................................................................................................................... 2-8
5. Hydraulic fittings .......................................................................................................................................2-9
5.1 Adapters, elbows and others............................................................................................................. 2-9
MAINTENANCE CHECK LIST......................................................................................................................... 2-11
1. Loader service intervals.......................................................................................................................... 2-11
CHECK AND MAINTENANCE.........................................................................................................................2-13
1. Lubricating loader ...................................................................................................................................2-13
2. Re-tightening main frame bolt and nut ................................................................................................... 2-13
3. Daily checking the loader .......................................................................................................................2-13
4. Check points of every 50 hours .............................................................................................................. 2-14
4.1 Precautions for checking torque of bolt and nut of main frame ....................................................... 2-14
SPECIAL TOOLS.............................................................................................................................................2-15
1. Special tools for loader ...........................................................................................................................2-15
1.1 Sliding jig and correcting jig ............................................................................................................ 2-15
3. FRONT LOADER
MECHANISM .....................................................................................................................................................3-1
1. Hydraulic circuit ........................................................................................................................................3-1
2. Front remote hydraulic control system (if equipped) ................................................................................ 3-3
2.1 Operating control lever ...................................................................................................................... 3-3
3. Boom cylinder and bucket cylinder ........................................................................................................... 3-4
3.1 Structure of boom cylinder and bucket cylinder ................................................................................ 3-4
4. One touch front loader ..............................................................................................................................3-5
4.1 Outline of one touch front loader ....................................................................................................... 3-5
LA344, LA344S i
5. One lever quick touch 4 lines coupler....................................................................................................... 3-5

5.1 Structure of one lever quick touch 4 lines coupler ............................................................................ 3-5
6. Auto lock attachment and detachment ..................................................................................................... 3-5
6.1 Outline of auto lock attachment and detachment .............................................................................. 3-5
6.2 Function of auto lock attachment and detachment ........................................................................... 3-6
7. Mechanical loader frame standing mechanism ........................................................................................ 3-6
7.1 Structure of mechanical loader frame standing mechanism ............................................................. 3-6
8. 3rd function valve (If equipped) ................................................................................................................ 3-7
8.1 Structure of 3rd function valve .......................................................................................................... 3-7
8.2 Function of 3rd function valve ........................................................................................................... 3-8
8.2.1 Activation switch in off position ................................................................................................. 3-8
8.2.2 Activation switch in on position ................................................................................................. 3-9
SERVICING ..................................................................................................................................................... 3-11
1. Troubleshooting for front loader.............................................................................................................. 3-11
2. Tightening torques for front loader.......................................................................................................... 3-13
3. Checking and adjusting .......................................................................................................................... 3-14
3.1 Loader stand ...................................................................................................................................3-14
3.1.1 Adjusting height of loader stand ............................................................................................. 3-14
3.2 Front hydraulic valve main switch and relay ................................................................................... 3-17
3.2.1 Checking front hydraulic valve main switch continuity ............................................................ 3-17
3.2.2 Checking connector voltage of front hydraulic valve main switch........................................... 3-18
3.2.3 Checking relay ........................................................................................................................ 3-18
3.3 3rd function solenoid valve.............................................................................................................. 3-19
3.3.1 Checking 3rd function solenoid valve continuity ..................................................................... 3-19
3.3.2 Checking connector voltage of 3rd function solenoid valve .................................................... 3-19
4. Disassembling and assembling .............................................................................................................. 3-19
4.1 Removing and attaching front loader .............................................................................................. 3-19
4.1.1 Removing loader..................................................................................................................... 3-19
4.1.2 Reinstalling loader .................................................................................................................. 3-22
4.2 Bucket, boom and hydraulic cylinders............................................................................................. 3-26
4.2.1 Attaching attachments ............................................................................................................ 3-26
4.2.2 Detaching attachments ........................................................................................................... 3-28
4.2.3 Removing bucket cylinder....................................................................................................... 3-28
4.2.4 Removing boom cylinder and hydraulic tubes ........................................................................ 3-28
4.2.5 Removing piston rod assembly............................................................................................... 3-29
4.2.6 Removing cylinder head, piston and nut................................................................................. 3-29
4.2.7 Removing piston seal and O-ring ........................................................................................... 3-30
4.2.8 Installing O-ring and piston seal ............................................................................................. 3-30
4.3 Side frames, front guard and main frames ...................................................................................... 3-31
4.3.1 Removing side frames ............................................................................................................ 3-31
4.3.2 Removing front guard ............................................................................................................. 3-31
4.3.3 Removing main frames ........................................................................................................... 3-31
4.4 3rd function valve (If equipped) ....................................................................................................... 3-32
4.4.1 Removing 3rd function valve .................................................................................................. 3-32
4.4.2 Removing hydraulic tubes of 3rd function............................................................................... 3-32
5. Servicing .................................................................................................................................................3-33
5.1 Piston rod ........................................................................................................................................3-33
5.1.1 Checking piston rod bend ....................................................................................................... 3-33
ii LA344, LA344S
1. INFORMATION

SAFETY FIRST https://truckmanualshub.com/
1. Before you start service 1. INFORMATION
SAFETY FIRST
1. Before you start service
SAFETY FIRST
• This symbol, the industry's "Safety Alert
Symbol", is used throughout this manual and
on labels on the machine itself to warn of the
possibility of personal injury. Read these
instructions carefully.
• It is essential that you read the instructions and
safety regulations before you try to repair or
use this unit.
DANGER
• Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury.
• Read all instructions and safety instructions in this
manual and on your machine safety decals.
WARNING • Clean the work area and machine.
• Indicates a potentially hazardous situation • Park the machine on a stable and level ground, and
which, if not avoided, could result in death or set the parking brake.
serious injury. • Lower the implement to the ground.
• Stop the engine, then remove the key.
• Disconnect the battery negative cable.
CAUTION • Hang a “DO NOT OPERATE” tag in the operator
• Indicates a potentially hazardous situation station.
which, if not avoided, may result in minor or
moderate injury.
2. Start safely
IMPORTANT
• Indicates that equipment or property damage
could result if instructions are not followed.
NOTE
• Gives helpful information.
• Do not do the procedures below when you start the

engine.
1. Short across starter terminals.
2. Bypass the safety start switch.
• Do not alter or remove any part of machine safety
system.
• Before you start the engine, make sure that all shift
levers are in neutral positions or in disengaged
positions.
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1. INFORMATION 3. Operate safely
• Do not start the engine when you stay on the the radiator cap when it is at a sufficiently low
ground. Start the engine only from operator's seat. temperature to touch with bare hands. Slowly
loosen the cap to release the pressure before you
remove it fully.
3. Operate safely • Released fluid (fuel or hydraulic oil) under pressure
can cause damage to the skin and cause serious
injury. Release the pressure before you disconnect
hydraulic or fuel lines. Tighten all connections
before you apply the pressure.
• Do not open a fuel system under high pressure.
The fluid under high pressure that stays in fuel lines
can cause serious injury. Do not disconnect or
repair the fuel lines, sensors, or any other
components between the fuel pump and injectors
on engines with a common rail fuel system under
high pressure.
• Put on an applicable ear protective device
(earmuffs or earplugs) to prevent injury against loud
noises.
• Be careful about electric shock. The engine
generates a high voltage of more than DC100 V in
the ECU and is applied to the injector.
4. Prevent a fire
• Fuel is very flammable and explosive under some

conditions. Do not smoke or let flames or sparks in
your work area.
• To prevent sparks from an accidental short circuit,
always disconnect the battery negative cable first
and connect it last.
• The battery gas can cause an explosion. Keep the
• Do not use the machine after you consume alcohol sparks and open flame away from the top of
or medication or when you are tired. battery, especially when you charge the battery.
• Put on applicable clothing and safety equipment. • Make sure that you do not spill fuel on the engine.
• Use applicable tools only. Do not use alternative
tools or parts.
• When 2 or more persons do servicing, make sure
that you do it safely.
• Do not touch the hot parts or parts that turn when
the engine operates.
• Do not remove the radiator cap when the engine
operates, or immediately after it stops. If not, hot
water can spout out from the radiator. Only remove
1-2 LA344, LA344S

SAFETY FIRST https://truckmanualshub.com/
5. Keep a good airflow in the work area 1. INFORMATION
5. Keep a good airflow in the 7. Prevent acid burns

work area
• Keep electrolyte away from your eyes, hands and

• If the engine is in operation, make sure that the clothing. Sulfuric acid in battery electrolyte is
area has good airflow. Do not operate the engine in poisonous and it can burn your skin and clothing
a closed area. The exhaust gas contains poisonous and cause blindness. If you spill electrolyte on
carbon monoxide. yourself, clean yourself with water, and get medical
aid immediately.
6. Discard fluids correctly 8. Prepare for emergencies
• Do not discard fluids on the ground, down the drain,

into a stream, pond, or lake. Obey related • Keep a first aid kit and fire extinguisher ready at all
environmental protection regulations when you times.
discard oil, fuel, coolant, electrolyte and other • Keep the emergency contact telephone numbers
dangerous waste. near your telephone at all times.
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1. INFORMATION
1-4 LA344, LA344S

SAFETY DECALS https://truckmanualshub.com/
1. Safety decals 1. INFORMATION
SAFETY DECALS
1. Safety decals
The following safety decals (pictorial safety labels) are installed on the machine. If a decal becomes damaged,
illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
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1. INFORMATION
1-6 LA344, LA344S

SAFETY DECALS https://truckmanualshub.com/
1. INFORMATION
LA344, LA344S 1-7

https://truckmanualshub.com/ SAFETY DECALS
1. INFORMATION 2.Care of danger, warning, and caution labels
2. Care of danger, warning, and caution labels

• Keep danger, warning and caution labels clean and free from obstructing material.
• Clean danger, warning and caution labels with soap and water, and dry with a soft cloth.
• Replace damaged or missing danger, warning and caution labels with new labels from your local Kubota dealer.
• If a component with danger, warning and caution label(s) affixed is replaced with a new part, make sure the new
label(s) is (are) attached to the same location(s) as the replaced component.
• Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to
the outside edge.
1-8 LA344, LA344S

TERMINOLOGY https://truckmanualshub.com/
1.Loader terminology 1. INFORMATION
TERMINOLOGY
1. Loader terminology
(1) Side frame (5) Boom cylinder (9) Lock lever (13) Stand
(2) Hydraulic control lever (6) Boom (10) Mounting lever
(3) Mounting hook (7) Bucket cylinder (11) Stand lever
(4) Main frame (8) Bucket (12) Stand rod
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1. INFORMATION
1-10 LA344, LA344S

SPECIFICATIONS https://truckmanualshub.com/
1.Specifications for loader 1. INFORMATION
SPECIFICATIONS
1. Specifications for loader

Loader model LA344 LA344S
BX2380, BX2680, and BX2380, BX2680, and
Tractor model BX1880 BX1880
BX23S BX23S
Wheel base (WB) 1400 mm (55.1 in.)
Front tires 16 × 7.5-8 18 × 8.5-10 16 × 7.5-8 18 × 8.5-10
Rear tires 24 × 12-12 26 × 12-12 24 × 12-12 26 × 12-12
Bore 40 mm (1.57 in.)
Boom cylinder
Stroke 326 mm (12.8 in.)
Bore 65 mm (2.56 in.)
Bucket cylinder
Control valve One detent float position, single bucket dump, power beyond circuit
Rated flow 14 L/m (3.7 GPM)
Maximum pressure 12.8 MPa (130 kg/cm2, 1850 psi)
Net weight (approximate) *217 kg (478 lbs)
* Include the quick bucket 48 in.
2. Specifications for bucket

Model Square 48 in.
Type Rigid Quick attach
Width 1219 mm (48.0 in.)
Depth (L) 491 mm (19.3 in.) 470 mm (18.5 in.)
Height (M) 465 mm (18.3 in.) 523 mm (20.6 in.)
Length (N) 538 mm (21.2 in.) 586 mm (23.1 in.)
(Continued)
LA344, LA344S 1-11

https://truckmanualshub.com/ SPECIFICATIONS
1. INFORMATION 3.Dimensional specifications

Struck 0.14 m3 (4.9 cu.ft.) 0.13 m3 (4.6 cu.ft.)
Capacity
Heaped 0.17 m3 (6.0 cu.ft.) 0.17 m3 (6.0 cu.ft.)
Weight 60 kg (132 lbs) 56 kg (123 lbs)
3. Dimensional specifications
BX2380, BX2680, BX2380, BX2680,
and BX23S and BX23S
A Maximum lift height (to bucket pivot pin) 1795 mm (70.7 in.) 1804 mm (71.0 in.) 1795 mm (70.7 in.) 1804 mm (71.0 in.)
B Maximum. lift height under level bucket 1652 mm (65.0 in.) 1662 mm (65.4 in.) 1654 mm (65.1 in.) 1664 mm (65.5 in.)
C Clearance with bucket dumped 1316 mm (51.8 in.) 1323 mm (52.1 in.) 1281 mm (50.4 in.) 1288 mm (50.7 in.)
D Reach at max. lift height (dumping reach) 642 mm (25.3 in.) 646 mm (25.4 in.) 673 mm (26.5 in.) 677 mm (26.5 in.)
E Maximum dump angle 0.79 rad (45°)
F Reach with bucket on ground 1398 mm (55.0 in.) 1392 mm (54.8 in.) 1445 mm (56.9 in.) 1438 mm (56.6 in.)
G Bucket roll-back angle 0.52 rad (30°) 0.51 rad (29°) 0.52 rad (30°) 0.51 rad (29°)
H Digging depth 134 mm (5.3 in.) 125 mm (4.9 in.) 132 mm (38.6 in.) 122 mm (4.8 in.)
J Overall height in carrying position 981 mm (38.6 in.) 990 mm (39.0 in.) 981 mm (38.6 in.) 990 mm (39.0 in.)
1-12 LA344, LA344S

SPECIFICATIONS https://truckmanualshub.com/
4.Operational specifications 1. INFORMATION
4. Operational specifications
BX2380, BX2680, BX2380, BX2680,
and BX23S and BX23S
U Lift capacity (Bucket pivot pin, max. height) 335 kg (739 lbs) 278 kg (613 lbs)
V Lift capacity (500 mm forward, max. height) 231 kg (509 lbs) 192 kg (423 lbs)
Lift capacity (Bucket pivot pin, 1500 mm
W 372 kg (820 lbs) 317 kg (699 lbs)
height)
Lift capacity (500 mm forward, 1500 mm
X 268 kg (591 lbs) 229 kg (505 lbs)
height)
Y Breakout force (Bucket pivot pin) 6258 N (1407 lbf) 5719 N (1286 lbf)
Z Breakout force (500 mm forward) 4389 N (987 lbf) 4008 N (901 lbf)
VV Bucket roll-back force at max. height 4731 N (1064 lbf) 4431 N (996 lbf)
XX Bucket roll-back force at 1500 mm height 5557 N (1249 lbf) 5264 N (1183 lbf)
ZZ Bucket roll-back force at ground level 5456 N (1227 lbf) 5195 N (1168 lbf)
Raising time 3.3 sec.
Lowering time 2.5 sec.
Bucket dumping time 2.7 sec.
Bucket rollback time 2.3 sec.
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1. INFORMATION
LA344
LA344S
(A) Height (mm) (C) At pivot pin (E) Rollback force (kN)
(B) Lift capacity (kg) (D) 500 mm forward of pivot pin
1-14 LA344, LA344S

2. GENERAL

IDENTIFICATION https://truckmanualshub.com/
1. Loader identification 2. GENERAL
IDENTIFICATION
1. Loader identification
When contacting your local KUBOTA distributor, always
specify front loader serial number (1).
(1) Serial number [A] Boom RH inside
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2. GENERAL
2-2 LA344, LA344S

GENERAL PRECAUTIONS https://truckmanualshub.com/
2. GENERAL
GENERAL PRECAUTIONS
• Before you disassemble or repair machine, make
sure that you always disconnect the ground cable
from the battery first.
• Remove oil and dirt from parts before you measure.
• Use KUBOTA genuine parts for replacement to
keep the machine performance and to make sure of
safety.
• You must replace the gaskets and O-rings when
you assemble again. Apply grease (1) to new O-
rings or oil seals before you assemble.
• When you assemble the external or internal snap
rings, make sure that the sharp edge (3) faces
against the direction from which force (2) is applied.
• When inserting spring pins, their splits must face
the direction from which a force is applied.
• To prevent damage to the hydraulic system, use
specified fluid or equivalent.
• Clean the parts before you measure them.
• Tighten the fittings to the specified torque. Too
much torque can cause damage to the hydraulic
units or the fittings. Not sufficient torque can cause
oil leakage.
• When you use a new hose or pipe, tighten the nuts
to the specified torque. Then loosen (approx. by
45°) and let them be stable before you tighten to
the specified torque (This is not applied to the parts
with seal tape.).
• When you remove the two ends of a pipe, remove
the lower end first.
• Use two pliers in removal and installation. One to
hold the stable side, and the other to turn the side
you remove to prevent twists.
• Make sure that the sleeves of flared connectors and
tapers of hoses are free of dust and scratches.
• After you tighten the fittings, clean the joint and
apply the maximum operation pressure 2 to 3 times
to check oil leakage.
(1) Grease (5) Rotating movement

(2) Force (A) External circlip
(3) Sharp edge (B) Internal circlip
(4) Axial force
• When you disassemble, carefully put the parts in a

clean area to make it easy to find the parts. You
must install the screws, bolts and nuts in their initial
position to prevent the reassembly errors.
• When it is necessary to use special tools, use
KUBOTA special tools. Refer to the drawings when
you make special tools that you do not use
frequently.
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2. GENERAL
2-4 LA344, LA344S

LUBRICATING SYSTEM https://truckmanualshub.com/
1.Lubricants 2. GENERAL
LUBRICATING SYSTEM
1. Lubricants
To prevent serious damage to hydraulic systems, use only specified fluid or its equivalent.
Place Capacity Lubricants, type of grease
11.3 L
Transmission case 2.99 U.S.qts KUBOTA SUPER UDT fluid*
2.5 Imp.qts
Grease fitting Until grease overflows. Moly Ep type grease**
* KUBOTA original transmission hydraulic fluid

** "Extreme pressure" and containing Molybdenum disulfide is recommended. This grease may specify "Moly Ep" on it's label.
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2. GENERAL
2-6 LA344, LA344S

TIGHTENING TORQUES https://truckmanualshub.com/
1.General use screws, bolts, and nuts 2. GENERAL
TIGHTENING TORQUES
1. General use screws, bolts, and nuts

Tighten screws, bolts, and nuts whose tightening torques are not specified in the Workshop Manual according to the
table below.
Indica-
tion on
No-grade or 4T 7T 9T
top of
bolt
Indica-
tion on
No-grade or 4T 6T
top of
nut
Materi-
al of
oppo- Ordinariness Aluminum Ordinariness Aluminum Ordinariness
nent
part
Unit N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft
7.9 to 0.80 to 5.8 to 7.9 to 0.80 to 5.8 to 9.81 to 1.00 to 7.24 to 7.9 to 0.80 to 5.8 to 12.3 to 1.25 to 9.05 to
M6
9.3 0.95 6.8 8.8 0.90 6.5 11.2 1.15 8.31 8.8 0.90 6.5 14.2 1.45 10.4
1.8 to 1.7 to 2.4 to 1.8 to 3.0 to
M8 18 to 20 13 to 15 17 to 19 13 to 14 24 to 27 18 to 20 18 to 20 13 to 15 30 to 34 22 to 25
2.1 2.0 2.8 2.1 3.5
4.0 to 3.2 to 4.9 to 4.0 to 6.2 to
M10 40 to 45 29 to 33 32 to 34 24 to 25 48 to 55 36 to 41 40 to 44 29 to 32 61 to 70 45 to 52
4.6 3.5 5.7 4.5 7.2
6.4 to 7.9 to 6.4 to 103 to 10.5 to 76.0 to
M12 63 to 72 47 to 53 — — — 78 to 90 58 to 66 63 to 72 47 to 53
7.4 9.2 7.4 117 12.0 86.7
108 to 11.0 to 79.6 to 124 to 12.6 to 91.2 to 167 to 17.0 to 123 to
M14 — — — — — —
125 12.8 92.5 147 15.0 108 196 20.0 144
167 to 17.0 to 123 to 197 to 20.0 to 145 to 260 to 26.5 to 192 to
M16 — — — — — —
191 19.5 141 225 23.0 166 304 31.0 224
M18 — — — — — —
284 29.0 209 318 32.5 235 402 41.0 296
M20 — — — — — —
392 40.0 289 431 44.0 318 568 58.0 419
2. Stud bolts
Material of oppo-
Ordinariness Aluminum
nent part
Unit N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft
M8 12 to 15 1.2 to 1.6 8.7 to 11 8.9 to 11 0.90 to 1.2 6.5 to 8.6
M10 25 to 31 2.5 to 3.2 18 to 23 20 to 25 2.0 to 2.6 15 to 18
M12 30 to 49 3.0 to 5.0 22 to 36 31 3.2 23
M14 62 to 73 6.3 to 7.5 46 to 54 — — —
M16 98.1 to 112 10.0 to 11.5 72.4 to 83.1 — — —
M18 172 to 201 17.5 to 20.5 127 to 148 — — —
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https://truckmanualshub.com/ TIGHTENING TORQUES
2. GENERAL 3.American standard screws, bolts and nuts with UNC or UNF threads
3. American standard screws, bolts and nuts with UNC or UNF

threads
Grade SAE GR.5 SAE GR.8
Unit N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft

1/4 11.7 to 15.7 1.20 to 1.60 8.63 to 11.5 16.3 to 19.7 1.67 to 2.00 12.0 to 14.6
5/16 23.1 to 27.7 2.36 to 2.82 17.0 to 20.5 33 to 39 3.4 to 3.9 25 to 28
3/8 48 to 56 4.9 to 5.7 36 to 41 61 to 73 6.3 to 7.4 45 to 53
1/2 110 to 130 11.3 to 13.2 81.2 to 95.8 150 to 178 15.3 to 18.1 111 to 131
9/16 150 to 178 15.3 to 18.1 111 to 131 217 to 260 22.2 to 26.5 160 to 191
5/8 204 to 244 20.8 to 24.8 151 to 179 299 to 357 30.5 to 36.4 221 to 263
4. Plugs and grease fittings

Material of opponent part
Shape Size Ordinariness Aluminum
N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft
R1/8 13 to 21 1.3 to 2.2 9.4 to 15 13 to 19 1.3 to 2.0 9.4 to 14
Tapered screw
R1/4 25 to 44 2.5 to 4.5 18 to 32 25 to 34 2.5 to 3.5 18 to 25
R3/8 49 to 88 5.0 to 9.0 37 to 65 49 to 58 5.0 to 6.0 37 to 43
R1/2 58.9 to 107 6.00 to 11.0 43.4 to 79.5 59 to 78 6.0 to 8.0 44 to 57
Straight screw G1/4 25 to 34 2.5 to 3.5 18 to 25 — — —
G3/8 62 to 82 6.3 to 8.4 46 to 60 — — —
G1/2 49 to 88 5.0 to 9.0 37 to 65 — — —
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TIGHTENING TORQUES https://truckmanualshub.com/
5.Hydraulic fittings 2. GENERAL
5. Hydraulic fittings
5.1 Adapters, elbows and others
Item Thread size Tightening torque
9/16 37 to 44 N⋅m 3.8 to 4.4 kgf⋅m 28 to 32 lbf⋅ft
Adjustable elbow,
adapter (O-ring port) 3/4 48 to 54 N⋅m 4.9 to 5.5 kgf⋅m 36 to 39 lbf⋅ft
(UNF)
Hose fitting, flare nut
(UNF)
Adapter (NPT) 3/8 39 to 60 N⋅m 4.0 to 6.1 kgf⋅m 29 to 44 lbf⋅ft
1/8-27 4.1 to 6.7 N⋅m 0.42 to 0.69 kgf⋅m 3.0 to 5.0 lbf⋅ft
Grease fitting
1/4-18 4.1 to 6.7 N⋅m 0.42 to 0.69 kgf⋅m 3.0 to 5.0 lbf⋅ft
NOTE
• When connecting a hose with flare nut, after tightening the nut with specified torque, return it at approxi-
mately 45 degrees (0.79 rad) and re-tighten it to specified torque.
LA344, LA344S 2-9

https://truckmanualshub.com/ TIGHTENING TORQUES
2. GENERAL 5.Hydraulic fittings
2-10 LA344, LA344S

MAINTENANCE CHECK LIST https://truckmanualshub.com/
1.Loader service intervals 2. GENERAL
MAINTENANCE CHECK LIST

1. Loader service intervals
To keep the machine working in good condition as well as to avoid any accident and trouble, carry out periodic
inspection and maintenance. Check the following points before use.
Service intervals Check points Reference page
Daily (Each use) Check hydraulic hoses. 2-13
Every 10 hours Apply all grease fittings. 2-13
Every 50 hours Check the main frame mounting bolts. 2-14
LA344, LA344S 2-11

https://truckmanualshub.com/ MAINTENANCE CHECK LIST
2. GENERAL
2-12 LA344, LA344S

CHECK AND MAINTENANCE https://truckmanualshub.com/
1.Lubricating loader 2. GENERAL
CHECK AND MAINTENANCE

1. Lubricating loader 3. Daily checking the loader
KUBOTA recommends the high quality grease
designated as the extreme pressure and containing the WARNING
Molybdenum disulfide. Recommended grease may To avoid personal injury or death:
specify “Moly EP” on its label. • When removing the engine-side-covers, be
1. Lubricate all grease fittings every 10 hours of careful not to touch hot loader cylinders. Allow
operation. Also, lubricate the joints of the control- all surfaces to cool before performing
lever-linkage every 10 hours. maintenance.
• Before servicing the loader or the tractor, be
sure to place the boom of the loader in contact
with the ground. When raising the lboom of the
loader during service or maintenance, support
the boom as shown in the figure.
2. Daily before operation, check the hydraulic fluid

level of the tractor. If the hydraulic fluid level is low,
add the hydraulic fluid as described in the tractor
operator's manual. Also change the filter element
and the hydraulic fluid as recommended in the
tractor operator's manual.
1. Check all hardware of the loader daily before
operation.
2. Re-tightening main frame bolt Tighten the hardware of the loader to torque values
and nut as specified in the general torque specification.
NOTE
• Before finally tightening all mounting hardware
of the loader, start the engine and apply down
pressure to the bucket until the loader raises
the front wheels slightly. Make sure that you
can rotate the mounting pins easily, and then
tighten all bolts and nuts.
After 20 to 30 hours of initial loader operation, re-

tighten all mounting bolts and nuts to the required
torque value as follows.
Tightening torque table

Location Bolt or nut Required torque
147 N⋅m
Main frame M14 bolts or nuts 15.0 kgf⋅m
108 lbf⋅ft
LA344, LA344S 2-13

https://truckmanualshub.com/ CHECK AND MAINTENANCE
2. GENERAL 4.Check points of every 50 hours
2. With the engine off and the bucket on the ground, bolts and nuts of the main frame are loose,
inspect all hoses for cuts or wear. Check for signs tighten them as follows.
of leaks and make sure all fittings are tight.
LA344 and LA344S
WARNING
To avoid personal injury or death:
• Escaping the hydraulic fluid under pressure
can obtain sufficient force to penetrate skin,
causing serious personal injury.
Before disconnecting lines, be sure to
relieve all pressure. Before applying
pressure to the loader system, be sure that
all connections are tight and that lines,
tubes, and hoses are not damaged. Fluid
escaping from a very small hole can be
almost invisible. Use a piece of cardboard or
wood, rather than your hands, to search for
suspected leaks. (1) Bolt and nut of the main
frame
If you are injured by escaping fluid, see a
doctor at once. Serious infection or allergic
147 N⋅m
reaction will develop if proper medical Bolt and nut of the
Tightening torque (15.0 kgf⋅m)
main frame
treatment is not administered immediately. [108 lbf⋅ft]
(1) Cardboard (3) Magnifying glass

(2) Hydraulic line
4. Check points of every 50

hours
4.1 Precautions for checking torque
of bolt and nut of main frame
WARNING
• Never operate the front loader with a loose main
frame.
• Any time bolts and nuts are loosened, retighten
to specified torque.
• Check all bolts and nuts frequently and keep
them tight.
• Check the bolts and nuts of the main frame
regularly especially when they are new. If the
2-14 LA344, LA344S

SPECIAL TOOLS https://truckmanualshub.com/
1.Special tools for loader 2. GENERAL
SPECIAL TOOLS
1. Special tools for loader Bucket cylinder (65 mm (2.56 in.))
A 80√
1.1 Sliding jig and correcting jig
B 0.157 rad (9.0°)
Use to install the O-ring and the piston seal.
C 65.18 mm dia. (2.566 in. dia.)
D 66.18 mm dia. (2.606 in. dia.)
E 42.0 mm (1.65 in.)
F 10.0 mm (0.4 in.)
G 58.5 mm (2.30 in.)
H 14 mm (0.55 in.)
I 35.0 mm (1.38 in.)
J 0.122 rad (7°)
K 65.2 mm dia. (2.567 in. dia.)
L 73.9 mm dia. (2.909 in. dia.)
(a) Sliding jig (b) Correcting jig
Boom cylinder (40 mm (1.57 in.))

A 80√
B 0.157 rad (9.0°)
C 40.18 mm dia. (1.582 in. dia.)
D 41.18 mm dia. (1.621 in. dia.)
E 42.0 mm (1.65 in.)
F 10.0 mm (0.4 in.)
G 58.5 mm (2.30 in.)
H 14 mm (0.55 in.)
I 35.0 mm (1.38 in.)
J 0.122 rad (7°)
K 40.2 mm dia. (1.583 in. dia.)
L 48.9 mm dia. (1.925 in. dia.)
LA344, LA344S 2-15

https://truckmanualshub.com/ SPECIAL TOOLS
2. GENERAL 1.Special tools for loader
2-16 LA344, LA344S

3. FRONT LOADER

MECHANISM https://truckmanualshub.com/
1. Hydraulic circuit 3. FRONT LOADER
MECHANISM
1. Hydraulic circuit
(1) Hydraulic pump (7) PTO clutch valve (13) Hydraulic cylinder (18) Bucket cylinder
(2) Oil strainer (8) PTO clutch (14) Boom spool valve (19) 3rd function cylinder (If equip-
(3) Hydrostatic transmission (9) Flow priority valve (15) Bucket spool valve ped)
(4) Relief valve (10) Power steering controller (16) Front loader control valve (20) Boom cylinder
(5) Oil filter (11) Power steering cylinder (17) 3rd function valve (If equip-
(6) PTO clutch relief valve (12) 3P hitch control valve ped)
The hydraulic system of this tractor and front loader has a hydraulic pump, control valve for front loader, 3 point hitch
system and other components. This system has the following functions:
1. Oil is supplied by hydraulic pump which is operated by pump drive shaft in the transmission case. As the pump
drive shaft is connected to the propeller shaft, hydraulic pump starts operating when engine starts.
2. The hydraulic pump supplies the high pressured oil to control valve for front loader, control valve for 3 point hitch
system, power steering controller, PTO clutch valve and hydrostatic transmission after dividing oil flow by flow
priority valve.
LA344, LA344S 3-1

https://truckmanualshub.com/ MECHANISM
3. FRONT LOADER
Specification of hydraulic parts

(1) 23.5 L/min. (6.2 U.S.gals/min., 5.2 Imp.gals/min.)
(4) 12.3 to 12.7 MPa (125 to 130 kgf/cm2, 1780 to 1840 psi)
(6) 0.5 MPa (5 kgf/cm2, 150 to 180 psi)
9.5 L/min. (2.5 U.S.gals/min., 2.1 Imp.gals/min.) to the power steering controller and excessive
(9)
flow to the front loader
3-2 LA344, LA344S

2. Front remote hydraulic control system (if equipped) 3. FRONT LOADER
2. Front remote hydraulic

control system (if equipped)
You can use the front remote hydraulic control system
for a front mounted hydraulic implement.
The front remote hydraulic control system provides
hydraulic oil to the front outlet directly.
2.1 Operating control lever
WARNING
To avoid personal injury or death
• Valve lock does not lock out switch-operated
third-function hydraulics, which are active when
the key switch and the front hydraulic valve
main switch are on.
1. Turn the front-hydraulic-valve-main-switch on.

a. Push the front-hydraulic-valve-main-switch to
engage the front-hydraulic-valve.
The light on the front-hydraulic-valve-main-switch
will illuminate to indicate that the front-hydraulic-
valve is on and to enable the activation switch and
operation of the lever.
2. Turn the activation switch on or off.
• When operating the lever to left side with
(1) Front hydraulic valve main (B) Front hydraulic valve main
pressing the activation switch, hydraulic oil will switch switch is off
come out of port 1 and return through port 2 as (2) Activation switch (C) Activation switch is on
long as operating the lever to left side with (3) Operating lever (D) Left side
(4) Front hydraulic outlet (E) Right side
pressing the activation switch.
(A) Front hydraulic valve main (F) Port 1
• When operating lever to right side with pressing switch is on (G) Port 2
the activation switch, hydraulic oil will come out
of port 2 and return through port 1 as long as IMPORTANT
operating lever to right side with pressing the • While a front mounted hydraulic attachment is
activation switch. used, make sure that the hydraulic hose is
3. Turn the front-hydraulic-valve-main-switch off. routed out of contact with the left and right
a. Push the front-hydraulic-valve-main-switch bucket links. Keep the hose from running over
again to disengage the front hydraulic valve. within the circled zone in the following figure.
The light of the front-hydraulic-valve-main-switch
will turn off.
LA344, LA344S 3-3

3. FRONT LOADER 3.Boom cylinder and bucket cylinder
3. Boom cylinder and bucket cylinder

3.1 Structure of boom cylinder and bucket cylinder
Both boom cylinder and bucket cylinder consist of a head (4), cylinder tube (3), piston rod (5), piston (2), and other
parts as shown in the figure below. They are single-rod double acting cylinder in which the reciprocating motion of the
piston is controlled by hydraulic force applied to both of its ends.
(1) Nut (3) Cylinder tube (5) Piston rod

(2) Piston (4) Head
Cylinder specifications
LA344, LA344S
Boom cylinder Cylinder I.D. 40 mm (1.57 in.)
Rod O.D. 25 mm (0.98 in.)
Bucket cylinder Cylinder I.D. 65 mm (2.56 in.)
Rod O.D. 30 mm (1.18 in.)
3-4 LA344, LA344S

4. One touch front loader 3. FRONT LOADER
4. One touch front loader

4.1 Outline of one touch front loader
One touch front loader is adopted to BX80 series
tractor. The operator can attach and disconnect the
front loader quickly and safely without getting down
from the tractor. The main component parts are shown
in the figure.
(1) Loader main frame (4) Mobile quick coupler

(2) Quick coupler lever (5) Quick coupler base
(3) Hydraulic hoses (6) Hydraulic pipe
6. Auto lock attachment and

detachment
6.1 Outline of auto lock attachment
and detachment
(1) Front loader control lever (4) Stand lever
(2) Quick coupler (5) Stand rod The side frame (5) is mounted on the main frame (1).
(3) Mounting lever (6) Stand The side frame (5) can be locked or freed by controlling
the mounting lever (3) on the lever guide (4). When the
5. One lever quick touch 4 lines bucket is lifted up, the side frame (5) and the main
frame (1) are locked. When the front wheels are lifted
coupler up by lowering the bucket to the ground, the operator
5.1 Structure of one lever quick can control the mounting lever (3) easily and release
the hook (2) mounted on the main frame by hand.
touch 4 lines coupler
The quick touch coupler allows to attach and remove
the quick coupler. The quick coupler is divided to the
upper part and the lower part. The upper part consists
of the quick coupler lever (2) and the mobile quick
coupler (4) with four hydraulic hoses (3).
The lower part consists of the quick coupler base (5)
with four hydraulic pipes (6). It is installed to the loader
main frame (1). Non-spill structure is adopted in the
couplers on the quick coupler base to protect the oil
leakage from the hydraulic oil line.
LA344, LA344S 3-5

3. FRONT LOADER 6.Auto lock attachment and detachment
Locked position
(1) Main frame (4) Lever guide

(2) Hook (5) Side frame
(3) Mounting lever
(3) Mounting lever
6.2 Function of auto lock attachment

and detachment 7. Mechanical loader frame
When the mounting lever (3) is moved to the upper
standing mechanism
position of the lever guide (4), the hook (2) is unlocked 7.1 Structure of mechanical loader
from the main frame (1). As a result, the side frame (5) frame standing mechanism
can be disconnected from the main frame (1).
The loader stand (1) is fixed to the loader arm (2) by
Free position the stand hooks (5). These stand hooks (5) can be
controlled by moving the stand lever (3). The stand rod
(4) is connecting the stand lever (3) and the stand
hooks (5). When the stand lever (3) is moved
downward, the stand hooks (5) are pulled in and free
the loader stand (1) from the loader arm (2).

(3) Mounting lever
When the mounting lever (3) is moved to the lower

position of the lever guide (4), the hook (2) is locked to
the main frame (1). As a result, the side frame (5) is
(1) Loader stand (4) Stand rod
locked to the main frame (1). (2) Loader arm (5) Stand hook
(3) Stand lever (6) Bucket
3-6 LA344, LA344S

8. 3rd function valve (If equipped) 3. FRONT LOADER
8. 3rd function valve (If

equipped)
8.1 Structure of 3rd function valve
P1: P1 port B: B port

P2: P2 port C: C port
A: A port D: D port
LA344, LA344S 3-7

3. FRONT LOADER 8.3rd function valve (If equipped)
8.2 Function of 3rd function valve

8.2.1 Activation switch in off position
1. When the activation switch in off position, the spool of 3rd function valve doesn't move. The oil passage from P1
port to A port and the oil passage from P2 port to D port are opened.
2. When the loader control lever is set to the dump position, the hydraulic oil enters from P1 port and exits at B port.
This extends the bucket cylinder.
3. Return oil from the bucket cylinder enters C port and travels throughout the valve to go to the transmission case
through P2 port.
NOTE
When the loader control lever is set to the roll-back position, the hydraulic oil enters from P2 port and exits at
C port. This extends the bucket cylinder. Return oil from the bucket cylinder enters B port and travels
throughout the valve to go to the transmission case through P1 port.
P1 P1 port A A port C C port (a) Low pressure

P2 P2 port B B port D D port (b) High pressure
3-8 LA344, LA344S

8. 3rd function valve (If equipped) 3. FRONT LOADER
8.2.2 Activation switch in on position

1. When the activation switch in on position, the spool of 3rd function valve moves to the right. This creates an oil
passage from P1 port to A port. The oil passage from P2 port to D port is also opened.
2. When the loader control lever is set to the dump position, the hydraulic oil enters from P1 port and exits at A port.
This extends the 3rd function cylinder.
3. Return oil from the 3rd function cylinder enters D port and travels throughout the valve to go to the transmission
case through P2 port.
NOTE
When the loader control lever is set to the roll-back position, the hydraulic oil enters from P2 port and exits at
D port. This extends the 3rd function cylinder. Return oil from the 3rd function cylinder enters A port and
travels throughout the valve to go to the transmission case through P1 port.
P1: P1 port A: A port C: C port (a) Low pressure

P2: P2 port B: B port D: D port (b) High pressure
LA344, LA344S 3-9

3. FRONT LOADER 8.3rd function valve (If equipped)
3-10 LA344, LA344S

SERVICING https://truckmanualshub.com/
1. Troubleshooting for front loader 3. FRONT LOADER
SERVICING
1. Troubleshooting for front loader
Refer-
Probable cause and checking
Symptom Solution ence
procedure
page
Boom does not rise. 1. Control valve is damaged. Repair or replace control valve. Tractor
WSM
2. Boom cylinder is damaged. Repair or replace boom cylinder. 3-28
3. Control lever linkage is dam- Repair or replace control lever Tractor
aged. linkage. WSM
4. Hydraulic pump is damaged. Repair or replace hydraulic Tractor
pump. WSM
5. Relief valve spring is dam- Replace relief valve spring. Tractor
aged. WSM
6. Relief valve is dirty. Clean relief valve. Tractor
WSM
7. Oil filter is clogged. Clean or replace oil filter. —
8. Hydraulic hose is damaged. Replace hydraulic hose. 3-28
Boom does not lower. 1. Control valve is damaged. Repair or replace control valve. Tractor
WSM
2. Control lever linkage is dam- Repair or replace control lever Tractor
aged. linkage. WSM
Boom speed is insufficient. 1. Boom cylinder tube is worn or Replace boom cylinder tube. 3-28
damaged.
2. Boom cylinder piston ring (pis- Replace boom cylinder piston 3-30
ton seal and O-ring) is worn or ring (piston seal and O-ring).
damaged.
3. Oil leaks from tube joints. Repair tube joints. —
4. Relief valve setting pressure is Adjust relief valve. Tractor
too low. WSM
5. Transmission fluid is insuffi- Fill transmission fluid. Tractor
cient. WSM
WSM
Bucket does not move. 1. Control valve is damaged Repair or replace control valve. Tractor
WSM
2. Bucket cylinder is damaged. Repair or replace bucket cylin- 3-28
der.
(Continued)
LA344, LA344S 3-11

https://truckmanualshub.com/ SERVICING
3. FRONT LOADER
Refer-
Probable cause and checking
Symptom Solution ence
procedure
page
Bucket does not move. 3. Control lever linkage is dam- Repair or replace control lever Tractor
aged. linkage. WSM
4. Hydraulic pump is damaged. Repair or replace hydraulic Tractor
pump. WSM
5. Oil filter is clogged. Clean or replace oil filter. —
6. Relief valve spring is dam- Replace relief valve spring. Tractor
aged. WSM
7. Hydraulic hose is damaged. Replace hydraulic hose. 3-28
WSM
Boom speed is insufficient. 1. Bucket cylinder tube is worn or Replace bucket cylinder tube. 3-28
damaged.
2. Bucket cylinder piston ring Replace bucket cylinder piston 3-30
(piston seal and O-ring) is worn ring (piston seal and O-ring).
or damaged.
3. Relief valve setting pressure is Adjust relief valve. Tractor
too low. WSM
WSM
5. Oil leaks from tube joints. Repair tube joints. 3-28
6. Transmission fluid is insuffi- Fill transmission fluid. Tractor
cient. WSM
Front end loader falls by its 1. Boom cylinder tube is worn or Replace boom cylinder tube. 3-29
weight. damaged.
2. Boom cylinder piston ring (pis- Replace boom cylinder piston 3-30
ton seal and O-ring) is worn or ring (piston seal and O-ring).
damaged.
3. Oil leaks from tube joints. Repair tube joints. 3-28
4. Control valve is damaged. Repair or replace control valve. Tractor
WSM
3rd function valve does not oper- 1. 3rd function valve wiring har- Repair or replace 3rd function —
ate correctly. ness is damaged. valve wiring harness.
2. 3rd function valve is damaged. Repair or replace 3rd function —
valve.
3. Battery voltage is not supplied Check battery supply voltage at 3-18
to front hydraulic valve main front hydraulic valve main switch
switch. connector.
Replace wiring harness.
4. Relay is damaged. Check or replace relay. 3-18
3-12 LA344, LA344S

2. Tightening torques for front loader 3. FRONT LOADER
2. Tightening torques for front loader

Tightening torques of screws, bolts and nuts on the table below are especially specified.
Item N⋅m kgf⋅m lbf⋅ft

Boom cylinder piston mounting nut 150 to 180 15.3 to 18.3 111 to 132
Bucket cylinder piston mounting nut 350 to 400 35.7 to 40.7 259 to 295
Main frame mounting bolt (M14) 115 11.7 85
RELATED PAGE
1. General use screws, bolts, and nuts on page 2-7
LA344, LA344S 3-13

3. FRONT LOADER 3.Checking and adjusting
3. Checking and adjusting

3.1 Loader stand
3.1.1 Adjusting height of loader stand
1. Make sure that the stand lever is at its low position
as shown in the following figure.
(1) Adjusting block (3) Lock nut

(2) Adjusting bolt
IMPORTANT
• Be sure to apply the bolts all the way to
prevent the damage of the stand.
(1) Stand lever

NOTE
• There is no need to tighten up the lock nuts.
2. Raise the boom until the bucket-fulcrum-pin comes
6. Move the hydraulic-control-lever to the dump
up to the height of the boom-fulcrum-pin.
position, and check to see if the stands are folded
3. Roll back the bucket to maximum. as specified.
7. Fasten the seat belt, and start the engine.
8. Move the hydraulic control lever to the dump
position until the hydraulic pressure gets relieved.
9. Lower the boom to put the bucket on the ground.
(1) Bucket fulcrum pin (A) Same height

(2) Boom fulcrum pin
4. Stop the engine.

5. Apply the adjusting bolts to the right and left stand
adjusting blocks as shown in the following figure. (1) Bucket (2) Stand
3-14 LA344, LA344S

3. Checking and adjusting 3. FRONT LOADER
10. Lift the stand on the right side of the loader up to

the position shown in the following figure.
(1) Stand lever (A) Center

(2) Lever guide
(1) Stand hook (A) Almost the same 14. Turn the adjusting bolt on the right side of the
(2) Stand pin loader to set the stand pin as shown as follows.
11. Reposition the adjusting bolt until it touches the
stand.
(1) Adjusting bolt
NOTE
• The position of the bolt is provisional and
may be roughly set for now.
12. Adjust the adjusting bolt in the same way as for the
stand on the left side of the loader.
13. Position the stand lever as shown in the figure.
(1) Adjusting bolt (A) Almost the same

(2) Stand (B) Adjusting range
(3) Stand hook
(4) Stand pin
Adjusting range (B) ± 15 mm
IMPORTANT
• Be careful not to allow the stands to go
beyond their adjustable range. Otherwise
the stands may get damaged.
15. Lock the stand pin using the lock nut.
LA344, LA344S 3-15

16. Turn the adjusting bolt and lock the stand pin on the
left side of the loader in the same way as for the
right side.
17. Look at the right and left stands to make sure that
the heads of the adjusting bolts are pressed upon
the stands.
(1) Stand (A) Parallel

(2) Loader pipe
19. Slide the stand lever in the upward direction and

make sure that the stand gets locked.
(1) Adjusting bolt (A) Touch

(2) Stand (B) Not touch
[A] Good
[B] No good
IMPORTANT
• Double-check that the heads of the adjusting
bolts are pressed upon the stands.
Otherwise the stands may get damaged in
storing them away.
18. Be sure that the stands run parallel with the loader
pipe. (1) Stand lever (3) Stand hook
(2) Stand
3-16 LA344, LA344S

20. Set the stand lever to the low position.
(1) Stand (2) Stand hook
(1) Stand lever

3.2 Front hydraulic valve main
21. Fasten the seat belt. switch and relay
22. Get the engine started, roll back the bucket and
move up the boom, both to maximum.
3.2.1 Checking front hydraulic valve main
switch continuity
23. Stop the engine.
24. Move the hydraulic-control-lever to the dump 1. Disconnect the front hydraulic valve main switch
position until the bucket comes to a complete stop. connector.
25. Make sure that the stands are folded as specified.
26. Fasten the seat belt.
27. Get the engine started and raise the engine speed
up to the following speed.
Engine speed 1800 rpm
28. Slowly dump the bucket until the stand touches the
boom.
29. Slide the stand lever upward direction, and then
slide the stand lever left side completely as shown
in the following figure.
(1) Front hydraulic valve main

switch
2. Measure the resistance with an ohmmeter between

terminal RB and terminal B.
(1) Stand lever
30. Hold the stand by stand hook.
LA344, LA344S 3-17

3. If 0 ohm is not indicated, replace the front hydraulic Wire harness side
valve main switch.
Terminal RB – On position 0Ω
Resistance
Terminal B Off position Infinity
Switch side
B: Black color of wiring RB: Red / Black color of wiring
4. If the measurement differs from the battery voltage,

wire harness is damaged.
3.2.3 Checking relay

B: Black color of wiring RB: Red / Black color of wiring 1. Remove the relay.
2. Apply battery voltage across terminals 3 and 4, and
check for continuity across terminals 1 and 2.
3.2.2 Checking connector voltage of front
hydraulic valve main switch
1. Disconnect the front hydraulic valve main switch
connector.
(A) Connector of relay
3. If continuity is not established, renew the relay.
(1) Front hydraulic valve main

switch
2. Turn the main switch on.

3. Measure the voltage between terminal RB and
terminal B.
3-18 LA344, LA344S

3.3 3rd function solenoid valve

3.3.1 Checking 3rd function solenoid valve
continuity
1. Disconnect solenoid valve connector.
(1) Solenoid valve connector
2. Turn the main switch on and push the front

hydraulic valve main switch (ON position), then
push the activation switch..
3. Measure the voltage between terminal 1 and
(1) Solenoid valve connector terminal 2.
2. Measure the resistance with an ohmmeter between Wire harness side
terminal 1 and terminal 2.
Solenoid valve side
1: Terminal 1 2: Terminal 2
4. If the measurement differs from the battery voltage,

1: Terminal 1 2: Terminal 2 wire harness is damaged.
3. If the measurement greatly differs from specified
value, replace the solenoid valve. 4. Disassembling and
Resistance Approx. 3.8 Ω
assembling
4.1 Removing and attaching front
loader
3.3.2 Checking connector voltage of 3rd
function solenoid valve IMPORTANT
• To remove the loader, park the tractor on flat
1. Disconnect solenoid valve connector.
and hard ground, apply the parking brake.
To start the engine or use the hydraulic control
valve, always stay in the operator's seat.
4.1.1 Removing loader
CAUTION
• Make sure an approved bucket is attached
before removing the loader from the tractor.
LA344, LA344S 3-19

3. FRONT LOADER 4.Disassembling and assembling
• For removing the loader, choose flat and hard

ground, preferably concrete.
• If the ground surface is soft, place suitable
planks on the ground for the bucket and stands.
• When starting the engine or using the hydraulic
control valve, always sit in the operator's seat.
• Make sure the bucket and stands are at ground
level.
4.1.1.1 How to remove the loader
WARNING
• Make sure that an approved bucket is attached
before removing the loader from the tractor.
• For removing the loader, choose flat and hard
ground, preferably concrete.
• If the ground surface is soft, place suitable
planks on the ground for the bucket and the
stand.
• When starting the engine or using the
hydraulic-control-lever, always sit in the
operator's seat.
• Make sure that the bucket and the stand are at
ground level.
1. Set the engine speed to the following speed, and (1) Stand lever (3) Stand hook
then raise the boom until the bucket pin is the (2) Stand
height of the boom fulcrum pin.
4. Get the bucket rolled back until its bottom is
Engine speed 1800 rpm positioned the following angle with respect to the
ground surface.
2. Dump the bucket fully.
(A) Angle between ground sur-

(1) Bucket pin (A) Same height face and bucket bottom
(2) Boom fulcrum pin
3. Slide the stand lever downward direction Angle between ground surface and bucket
About 20 degrees
bottom (A)
completely, and release the stand from the stand
hook.
3-20 LA344, LA344S

4. Disassembling and assembling 3. FRONT LOADER
5. Lower the boom and raise the front wheels slightly.
(1) Mounting lever
9. Back the tractor so that the quick coupler is

IMPORTANT positioned at the back of side frame as shown in the
• When raising the front wheels, the stands following figure.
are not to be grounded.
6. Slide the mounting levers of both sides to the
upward direction as shown in the following figure.
(1) Quick coupler (2) Side frame
10. Stop the engine, and slowly release all hydraulic

pressure by moving the hydraulic-control-lever in all
(1) Mounting lever directions.
7. Slowly move the hydraulic-control-lever to the 11. Unfasten the seat belt, and then turn the safety-
rollback position to raise the side frames of the lock-button counterclockwise to unlock it.
loader up and out of the receivers of the main
frames as shown in the following figure.
(1) Safety lock button
(1) Hydraulic control lever
8. Down the mounting levers of both sides as shown

in the following figure.
LA344, LA344S 3-21

12. Raise the lever until it stops.
(1) Cap [B] Tractor side

(2) Connector
(2) Lever [A] Mobile side
13. When the third-function-kit is mounted, remove the 14. Put the mobile part on the coupler stay (1). Put the
connector. Connect the caps to the connectors of mobile part on the coupler stay (2) for cab model .
mobile side and tractor side.
(1) Coupler stay (2) Coupler stay for cab model
15. Place the protective caps and plugs on the ends of

the quick coupler.
(1) Protective caps
16. Wear the seat belt and slowly back the tractor away
from the loader.
4.1.2 Reinstalling loader
CAUTION
To avoid personal injury:
3-22 LA344, LA344S

• To start the engine and operate the control

valve, always stay in the operator's seat.
4.1.2.1 How to reinstall the loader
WARNING
• When starting the engine and operating the
hydraulic-control-valve, always sit in the
operator's seat.
1. Slowly drive the tractor between the side frames of

the loader until the rear portion of both side frames (1) Side frame (A) 150 mm to 200 mm
touches the main frames as shown in the following (2) Main frame (B) Center of side frames
[A] LH
figures. [B] RH
2. Stop the engine and unfasten the seat belt.

3. Remove the protective caps.
4. Connect the quick coupler and lower the lever until
it stops, and then turn the safety-lock-button
clockwise.
(1) Lever (B) Clockwise

(2) Safety lock button
(A) Lower
IMPORTANT
• Get the quick coupler locked, and move up
and down the lever to make sure that the
quick coupler is tightly locked.
LA344, LA344S 3-23

5. When mounting the third-function-kit, remove the

caps from the connectors of mobile side and tractor
side. Connect the connectors and the caps as
shown in the follow figures.
(1) Mounting lever
7. Start the engine and run at the following speed.
Engine speed 1800 rpm
8. Slowly move the hydraulic-control-lever to the up

position until the guide bosses of both side frames
touch the main frames.
(1) Guide boss of side frame (A) Touch

(2) Main frame
9. Slowly move the hydraulic-control-lever to the

dump position to lower the side frames into the
main frames, and engage the bosses of the main
frames to the guide bosses of the side frames.
(1) Cap [B] Tractor side

(2) Connector
[A] Mobile side
6. Make sure that the mounting levers of both sides

are at their low position as shown in the follow
figures.
(1) Guide boss of side frame (A) Engage

(2) Boss of main frame
3-24 LA344, LA344S

10. Slowly move the control lever to the dump position

until the bucket tilts down as follows.
(1) Wire harness (2) Side frame
• Make sure not to pinch the wire harness in

(1) Bucket (A) Angle between bucket bot- the side frame when mounting the third-
(2) Tip of the stand tom and ground function-kit.
12. Slowly move the hydraulic-control-lever to the up
About 20 de-
Angle between bucket bottom and ground (A)
grees position until the cutting edge of the bucket comes
up slightly off the ground.
IMPORTANT 13. Make sure that the right and left mounting levers
• Make sure that the tips of the stands are off can not be activated.
the ground. Do not use the machine if the cutting edge of the
bucket is off the ground but the mount hooks are
11. Slowly move the hydraulic-control-lever to the unlocked.
down position to lift the front wheels slightly with
the loader until the mount hooks are completely
mounted on the main frame as shown in the
following figure.
(1) Mount hook (2) Mounting lever
(1) Mount hook
IMPORTANT
• Make sure that the hooks at both sides are
properly mounted on the main frame.
LA344, LA344S 3-25

14. Raise the boom until the bucket-fulcrum-pin comes

up to the height of the boom-fulcrum-pin.
(1) Stand (2) Stand hook
(1) Bucket fulcrum pin (2) Boom fulcrum pin

4.2 Bucket, boom and hydraulic
cylinders
15. Make sure that the stand lever is at its low position
as shown in the following figure. 4.2.1 Attaching attachments
DANGER
To avoid personal injury or death
• Use of a non-KUBOTA attachment that does not
comply with ISO24410 or the improper
positioning of handle(s) or non-protrusion of
pin(s) may result in detachment of the
attachment or deformation, causing loss of
performance, personal injury, or death.
NOTE
• Locate the attachments on a flat, firm surface
when attaching and removing them from the
(1) Stand lever
quick-attach-coupler.
16. Slowly dump the bucket until the stand touches the The quick-attach-coupler is designed to be used with
boom. KUBOTA attachments. To use non-KUBOTA
17. Slide the stand lever upward direction, and then attachments, it must comply with ISO 24410, first
slide the stand lever left side completely as shown edition 2005-04-15. The quick-attach-coupler allows the
in the following figure. operator to change the attachments easily without the
use of tools.
1. To mount an attachment, pull the quick-attach-
coupler-handles to the unlatched position to release
the latching pins. Move the quick-attach-coupler-
handles all the way up to ensure that the latching
pins are fully retracted.
(1) Stand lever
18. Hold the stand by stand hook.
3-26 LA344, LA344S

2. Position the tractor squarely in front of the

attachment and tilt the quick-attach-coupler forward
with the bucket cylinder.
(1) Quick attach coupler handle
7. Verify that both latching pins are completely

engaged in the base of the attachment.
(1) Quick attach coupler
3. Ease the quick-attach-coupler-mounting-plate into DANGER

the saddle of the attachment. To avoid personal injury or death
4. Roll the quick-attach-coupler back using the bucket • The following engagement points are
cylinder and raise the boom slightly. critical.
The back of the attachment should rest against the – The lock pins of the quick-attach-coupler
front of the quick-attach-coupler-mounting-plate, have to protrude into and through the
and the weight of the attachment should be pin slots of the attachment on both
supported by the loader. sides.
It is critical that the lock pins are in good
condition and without visible signs of
CAUTION wear or damage.
To avoid personal injury or machine damage: It is critical that the operator align the
• Raise the boom only enough to latch the quick-attach-coupler of the loader with
attachment. the attachment to allow the lock pins to
The attachment could swing off the quick- go through the pin slots.
attach-coupler. – Push down both quick-attach-coupler-
handles until the they contact the ear
plates near the points where the pin bolt
goes through the handle.
• Do not operate the tractor or attachment
unless all of the preceding conditions are
met.
(1) Quick attach coupler
5. When the attachment is properly seated in the

saddle and against the front of the quick-attach-
coupler-mounting-plate, turn off the engine and set
the parking brake.
6. Push the quick-attach-coupler-handles to the fully
(1) Handle (A) Points where the quick at-
latched position. (2) Ear plate tach coupler handle contacts
(3) Pin slot the ear plate
(4) Lock pin
LA344, LA344S 3-27

8. When pushing the quick-attach-coupler-handles 7. If an attachment is not going to be attached to the

into the locked position, visually verify that the latch quick-attach-coupler immediately, push the quick-
pins rotate completely and are located underneath attach-coupler-handles to the locked position to
the stop of the quick attach coupler. prevent damage to the handle assembly.
4.2.3 Removing bucket cylinder
CAUTION
To avoid personal injury:
• Before you disconnect hydraulic hoses, be sure
to release all pressure.
1. Disconnect the hydraulic hoses from the bucket

cylinder.
2. Remove lower pin and upper pin and remove the
bucket cylinder (1).
(1) Latch pins (2) Quick attach coupler stopper
9. When attaching different attachments, visually

inspect for broken or damaged pins. If broken or
damaged pins are found, replace before using.
Use of broken pins may result in detachment or
deformation of the attachment, causing loss of
performance, personal injury, or death.
You are now ready to use the attached attachment.
Attach and remove all compatible attachments using
the same method.
WARNING (1) Bucket cylinder

To avoid personal injury, death, or machine damage
• Never operate or transport the attachments (When reassembling)
which are not attached properly. • To install the bucket cylinder (1), the hydraulic port
• Always replace damaged hardware immediately. must point inside and be careful of the direction of
grease fittings.
4.2.2 Detaching attachments

4.2.4 Removing boom cylinder and
Detach the attachments in the reverse procedure of hydraulic tubes
attaching the attachments.
1. Lower the attachment to ground level with the 1. Disconnect the hydraulic hoses from the boom
attachment slightly in the rolled back position. cylinders (4).
2. Stop the engine and set the parking brake. 2. Remove the pins (2) and remove the boom
cylinders (4).
3. Pull the quick-attach-coupler-handles to the
unlatched position to release the latching pins. 3. Disconnect the hydraulic hoses (6) with quick
couplers at the control valve.
4. While sitting in the operator's seat of the tractor,
start the engine and slowly move the loader-control- 4. Remove the pins (1) and remove the boom (3) from
lever to the dump position until the attachment is the side frame (5).
pushed away slightly from the quick-attach-coupler.
5. Lower the boom of the loader so that the quick-
attach-coupler-mounting-plate clears the
attachment saddle.
6. Back away from the attachment slowly.
3-28 LA344, LA344S

5. Remove the hydraulic tubes (7) from the boom (3). 3. Pull out the piston rod assembly (2) from the
cylinder tube (3).
(1) Cylinder head (4) Adjustable gland nut wrench

(2) Piston rod assembly
(3) Cylinder tube
(When reassembling)
• Visually inspect the cylinder tube for signs of
scoring or damage.
• Put the piston rod assembly to the cylinder tube. Be
careful not to cause damage to the piston seal on
the piston.
• Install the cylinder head to the cylinder tube. Be
careful not to damage the O-ring on the cylinder
head.
(1) Pin (5) Side frame
(2) Pin (6) Hydraulic hose
(3) Boom (7) Hydraulic tube 4.2.6 Removing cylinder head, piston and
(4) Boom cylinder nut
(When reassembling) 1. Hold the rod end in a vise.
• To install the boom cylinders (4), the hydraulic port
must point inside and be careful of the direction of
grease fittings.
4.2.5 Removing piston rod assembly

1. Drain hydraulic oil from the cylinder, and secure the
tube end of the cylinder in a vise.
2. Remove the cylinder head (1) with the adjustable
gland nut wrench (4).
LA344, LA344S 3-29

2. Remove the nut (4), and remove the piston (3) and
cylinder head (2) from the piston rod (1).
(1) Piston (3) O-ring

(2) Piston seal
IMPORTANT
• To install the O-ring (3) and piston seal (2) to the
piston (1), use the slide jig and correcting jig as
shown in special tools of GENERAL section.
RELATED PAGE
1.1 Sliding jig and correcting jig on page 2-15
4.2.8 Installing O-ring and piston seal

1. Set the slide jig (2) on the piston (4).
(1) Piston rod (5) Wiper seal 2. Install the O-ring (3) to the piston using the slide jig.
(2) Cylinder head (6) Oil seal 3. Install the piston seal (1) over the O-ring using the
(3) Piston (7) O-ring
(4) Nut
slide jig.
NOTE
(When reassembling)
• Do not turn (roll) the piston seal as you
• Visually inspect all parts for signs of scoring or
install it.
damage.
• Put the piston rod to the cylinder head. Be careful
not to cause damage to the wiper seal (5) and oil
seal (6).
150 to 180 N⋅m

Boom cylinder pis-
15.3 to 18.3 kgf⋅m
ton mounting nut
Tightening tor- 111 to 132 lbf⋅ft
que Bucket cylinder 350 to 400 N⋅m
piston mounting 35.7 to 40.7 kgf⋅m
nut 259 to 295 lbf⋅ft
4.2.7 Removing piston seal and O-ring

1. Remove the piston seal (2) and O-ring (3) from the
(1) Piston seal (4) Piston
piston (1). (2) Slide jig
(3) O-ring
3-30 LA344, LA344S

4. Compress the piston seal to the correct size by

installing the piston into the correcting jig (5).
(1) Front guard
(5) Correcting jig

4.3.3 Removing main frames
4.3 Side frames, front guard and 1. Remove the main frame mounting bolts and nuts
main frames (2) from the tractor body.
2. Remove the main frame (1).
4.3.1 Removing side frames
1. Remove the pins (2), (5).
2. Remove the side frames (1) from the boom
assembly (3) and the boom cylinder (4).
(1) Main frame (2) Main frame mounting bolt
(When reassembling)
IMPORTANT
(1) Side frame (4) Boom cylinder • Be careful not to pinch the wire harness when
(2) Pin (5) Pin
(3) Boom assembly assembling the main frame.
• Tighten to the specified tightening torque.

4.3.2 Removing front guard 115 N⋅m
Tightening tor- Main frame mount-
11.7 kgf⋅m
1. Remove the front guard (1). que ing bolt (M14)
85 lbf⋅ft
LA344, LA344S 3-31

4.4 3rd function valve (If equipped)

4.4.1 Removing 3rd function valve
1. Remove cover (1) by removing bolts (2).
(5) Valve stay (6) Bolt
5. Remove hydraulic pipes (7).
(1) Cover (2) Bolt
2. Disconnect connector (3).
(7) Hydraulic pipes
4.4.2 Removing hydraulic tubes of 3rd

function
(3) Connector
1. Remove the hydraulic hoses (1).
3. Disconnect hydraulic hoses (4).
(1) Hydraulic hoses

(4) Hydraulic hoses
4. Remove valve stay (5) by removing bolts (6).
3-32 LA344, LA344S

5. Servicing 3. FRONT LOADER
2. Remove the boom cylinder (2). 2. Set a dial indicator on the center of the rod.
3. Turn the piston rod and read the dial indicator.
(2) Boom cylinder
3. Remove the 3rd wire harness stay (3) from the

0.25 mm
boom. Piston rod bend Allowable limit
0.0098 in.
4. If the measurement is more than the allowable limit,

replace it.
(3) 3rd wire harness stay
4. Remove the piping fixtures (4) and disconnect all

the hydraulic tubes (5).
(4) Piping fixtures (5) Hydraulic tubes
5. Servicing
5.1 Piston rod
5.1.1 Checking piston rod bend
1. Set the piston rod on V blocks.
LA344, LA344S 3-33

3. FRONT LOADER 5.Servicing
3-34 LA344, LA344S

INDEX
Symbols emergencies
preparation...........................................................1-3
3rd function solenoid valve
checking connector voltage............................... 3-19
F
checking continuity.............................................3-19
3rd function valve fire.............................................................................. 1-2
removing............................................................ 3-32 fluids correctly
structure............................................................... 3-7 discarding.............................................................1-3
force........................................................................... 2-3
A front guard
removing............................................................ 3-31
acid burns front hydraulic valve main switch
prevent................................................................. 1-3 checking connector voltage............................... 3-18
activation switch checking continuity.............................................3-17
off position............................................................3-8 front loader
on position............................................................3-9 tightening torques.............................................. 3-13
adapters..................................................................... 2-9 troubleshooting...................................................3-11
attachment front remote hydraulic control system........................ 3-3
attaching............................................................ 3-26
detaching........................................................... 3-28
G
auto lock attachment and detachment
function................................................................ 3-6 grease........................................................................ 2-3
outline.................................................................. 3-5 grease fittings.............................................................2-8
axial force...................................................................2-3
H
B height of loader stand
before you start service..............................................1-1 adjusting.............................................................3-14
bolts........................................................................... 2-7 hydraulic circuit.......................................................... 3-1
boom cylinder hydraulic tube
removing............................................................ 3-28 removing............................................................ 3-28
structure............................................................... 3-4
bucket L
specifications......................................................1-11
loader
bucket cylinder
identification......................................................... 2-1
removing............................................................ 3-28
lubricating...........................................................2-13
structure............................................................... 3-4
reinstall...............................................................3-23
remove............................................................... 3-20
C specifications......................................................1-11
circlip..........................................................................2-3 terminology.......................................................... 1-9
control lever
operating.............................................................. 3-3 M
correcting jig.............................................................2-15
main frame
cylinder head
removing............................................................ 3-31
removing............................................................ 3-29
main frame bolt
checking torque..................................................2-14
D re-tightening....................................................... 2-13
daily checking main frame nut
loader................................................................. 2-13 checking torque..................................................2-14
danger, warning, and caution labels.......................... 1-8 re-tightening....................................................... 2-13
dimensional specification......................................... 1-12 mechanical loader frame
structure (standing mechanism)...........................3-6
E
elbows........................................................................2-9
LA344, LA344S I
N
nut
removing............................................................ 3-29
nuts............................................................................ 2-7
O
O-ring
installing............................................................. 3-30
removing............................................................ 3-30
one lever quick touch 4 lines coupler
structure............................................................... 3-5
one touch front loader
outline.................................................................. 3-5
operate safely............................................................ 1-2
operational specifications.........................................1-13
P
piston
removing.................................................... 3-29,3-30
piston rod assembly
removing............................................................ 3-29
piston rod bend
checking.............................................................3-33
piston seal
installing............................................................. 3-30
plugs.......................................................................... 2-8
R
relay
checking.............................................................3-18
rotating movement..................................................... 2-3
S
safety decals.............................................................. 1-5
safety labels............................................................... 1-8
screws........................................................................2-7
service intervals........................................................2-11
sharp edge................................................................. 2-3
side frame
removing............................................................ 3-31
sliding jig.................................................................. 2-15
start safely..................................................................1-1
II LA344, LA344S
Editor : Farm Machinery International Service Department

Address : 64, Ishizu-Kitamachi, Sakai-Ku, Sakai-City, Osaka, 590-0823, Japan
Phone : +81- 72-241-1129
Fax : +81- 72-245-2484
E-mail : ks_g.ksos-pub@kubota.com
KUBOTA Corporation Printed in Japan 2017. 02, S, EI, EI, engusa Code No.9Y111-17180

Kubota LA344 Workshop Manual

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KiSC issued 02, 2017 A

KiSC issued 02, 2017 A

5. One lever quick touch 4 lines coupler....................................................................................................... 3-5

KiSC issued 02, 2017 A

• Do not do the procedures below when you start the

LA344, LA344S 1-1

• Fuel is very flammable and explosive under some

1-2 LA344, LA344S

5. Keep a good airflow in the 7. Prevent acid burns

• Keep electrolyte away from your eyes, hands and

6. Discard fluids correctly 8. Prepare for emergencies

• Do not discard fluids on the ground, down the drain,

LA344, LA344S 1-3

1-4 LA344, LA344S

LA344, LA344S 1-5

1-6 LA344, LA344S

LA344, LA344S 1-7

2. Care of danger, warning, and caution labels

1-8 LA344, LA344S

LA344, LA344S 1-9

1-10 LA344, LA344S

1. Specifications for loader

2. Specifications for bucket

Loader model LA344 LA344S

LA344, LA344S 1-11

Loader model LA344 LA344S

1-12 LA344, LA344S

LA344, LA344S 1-13

1-14 LA344, LA344S

KiSC issued 02, 2017 A

(1) Serial number [A] Boom RH inside

LA344, LA344S 2-1

2-2 LA344, LA344S

(1) Grease (5) Rotating movement

• When you disassemble, carefully put the parts in a

LA344, LA344S 2-3

2-4 LA344, LA344S

Grease fitting Until grease overflows. Moly Ep type grease**

* KUBOTA original transmission hydraulic fluid

LA344, LA344S 2-5

2-6 LA344, LA344S

1. General use screws, bolts, and nuts

LA344, LA344S 2-7

3. American standard screws, bolts and nuts with UNC or UNF

Unit N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m lbf⋅ft

4. Plugs and grease fittings

2-8 LA344, LA344S

LA344, LA344S 2-9

2-10 LA344, LA344S

MAINTENANCE CHECK LIST

LA344, LA344S 2-11

2-12 LA344, LA344S

CHECK AND MAINTENANCE

2. Daily before operation, check the hydraulic fluid

After 20 to 30 hours of initial loader operation, re-

Tightening torque table

LA344, LA344S 2-13

(1) Cardboard (3) Magnifying glass