Ba MHL350 0493

OPERATING INSTRUCTIONS
Mobile Hydraulic Loading Machine

MHL 350
AUSGABE EDITION
2002-05
GLTIG AB FAHRZEUGIDENTNUMMER VALID FROM VEHICLE IDENTITY NUMBER A PARTIR DU NUMERO DIDENTIFICATION DU VEHICULE
493 584
FUCHS-BAGGER GMBH & CO. KG MASCHINENFABRIK D-76669 BAD SCHNBORN

INDEX
The FUCHS Operating Instructions consist of 9 chapters aimed at different staff members:
Chapter Subject Staff members
1 FOREWORD Operating staff

Inspection and Maintenance staff
Repair staff
2 SAFETY AND ACCIDENT Operating staff

PREVENTION Repair staff
3 TECHNICAL DATA Operating staff

Repair staff
4 CONTROL Operating staff

The operating staff must be familiar with
the contents of the Operating
Instructions and the use of this or
comparable machinery.
5 WORK OPERATION Operating staff

The operating staff must be familiar with
the contents of the Operating
Instructions and the use of this or
6 TRANSPORT AND Operating staff

RECOVERY Repair staff
7 CARE AND MAINTENANCE Inspection, Maintenance and Repair

staff
The inspection, maintenance and repair
staff must have expert knowledge as well
as experience about inspection,
maintenance and repair of this or
8 TROUBLE SHOOTING Operating staff

Repair staff
9 APPENDIX Operating staff

Repair staff
MHL 350
TABLE OF CONTENTS
Page
1 FOREWORD
1.1 General......................................................................................................................... 1.1
1.2 Proper use .................................................................................................................... 1.1
1.3 Abbreviations and equivalent expressions .................................................................... 1.2
1.4 Introduction................................................................................................................... 1.2
1.5 Warrenty and maintenance........................................................................................... 1.2
1.6 Environmental standards .............................................................................................. 1.3
1.7 Notes on using the instruction book .............................................................................. 1.3
1.7.1 References to pictures and items........................................................................... 1.3
1.7.2 Dangers and important notes................................................................................. 1.3
1.7.3 Pictograms............................................................................................................. 1.4
1.8 Operating instructions provided by outside suppliers .................................................... 1.6
1.9 Copyright ...................................................................................................................... 1.6
1.10 Company address......................................................................................................... 1.6
1.10.1 Headquarters / Sales and Customer Service ......................................................... 1.6
1.10.2 Spare parts ............................................................................................................ 1.6
MHL 350
FOREWORD 1
1.1 General 1.2 Proper use

The MHL 350 Mobile Hydraulic Loading The MHL 350 loading machine is intended
Machine was thoroughly tested before it left solely for work which is suited to the function
the factory. The final inspection showed that of the machine and its work attachment. Such
all parts are in perfect working order, and the work involves the
machine achieves the expected level of per-
loading,
formance.
moving and
This instruction book is intended to help you
to familiarize yourself with your machine and shifting
the uses to which it may be put.
of materials such as scrap, scrap metal, chips
The instruction book contains important in- as well as different recycling materials.
formation telling you how to use the machine
The appropriate work attachments to these
safety, expertly and economically. Observing
purposes are:
these instructions will help you to avoid dan-
ger and to increase the reliability and life ex- sorting grabs
pectancy of the machine.
hydraulic rock breakers and shears
clamshell and cactus grabs
magnets
lift hooks
In the observation of this, all manufacturers
instructions contained in this instruction book
must be complied with.
Before using the machine for timber rehan-
dling, consult the manufacturer.
Any usage above and beyond that specified
here and any non-compliance with the manu-
facturers instructions is regarded as improper
use. The manufacturer shall not be liable for
damages resulting from improper use. This
risk is borne solely by the plant operator.
When mounting work attachments (provided
by outside suppliers) the proper use of this
attachment as stated by its manufacturer
must be observed.
Compliance with the instruction book, the per-
formance of maintenance work as specified
and adherence to replacement intervals are
all aspects of proper use.
MHL 350 1.1

1 FOREWORD
1.3 Abbreviations and equivalent expres- 1.5 Warranty and maintenance

sions
FUCHS can provide no warranty for
Below is an explanation of abbreviations and modifications or attachments to
equivalent expressions which are used in this equipment on FUCHS products
instruction book: which have not been approved by
MHL 350 : Mobile Hydraulic Loading Machine us or have not received our express
written consent. In such cases, our
StVO : Road Traffic Regulations
warranty for the machine lapses, as
StVZO : Regulations Authorizing the Use does our product liability for any
of Vehicles for Road Traffic resulting consequential damages.
UVV : Accident Prevention Regulation The warranty period covers 12 months or
CEB-control : Excavator Electronic Control 1,000 operating hours, and commences from
Unit the time that the machine is delivered to the
purchaser.
Mobile hydraulic loading machine: Machine,
loading machine Safe working conditions and good working
order of the machine are prerequisites for
1.4 Introduction efficient work. Your machine fulfils these re-
quirements when correctly handled and when
It is basically assumed that the machine will serviced and maintained as specified.
only be operated by authorized, trained and
specially instructed personnel. Careful observation of the machine whilst in
function and the use of the specified fuels,
This instruction book and any other supplied lubricants and coolants will prevent malfunc-
operating instructions must be kept handy in tion.
the machine at all times.
Trained specialist personnel are responsible
Your attention is drawn in these instruction for any servicing of the machine which re-
books to points of special importance for safe, quires expert knowledge. Inspections and
expert use of the machine. repairs must therefore be carried out by your
Only if the user is familiar with these instruc- dealers customer service.
tions can errors be prevented and trouble-free In respect of possible claims for damages
operation assured. It is therefore very impor- during the warranty period, all work contained
tant that those persons who are actually re- in the maintenance and inspection plan must
sponsible for operation are familiar with the be carried out at the specified intervals.
instructions. They must be thoroughly read
and understood, as the manufacturer will not After the warranty period, too, regular mainte-
assume liability for damages and operating nance must be performed in order to ensure
problems arising as a result of non- that the machine is constantly in good working
compliance with instructions. order and enjoys a reasonable service life.
If you require additional information or if any Insist that only original FUCHS spare parts
point is unclear, please contact your dealer are used in the event of any repair work. In
immediately. this way, you will have a product of lasting
high quality, thereby ensuring that your ma-
We reserve the right to make improvements chine maintains its original condition.
on the machine within the scope of impending
technical developments, without effectively
changing these operating instructions.
1.2 MHL 350

FOREWORD 1
Please state the vehicle identity

number when making inquiries or
orders, and in all written correspon-
dence.
The vehicle identity number of the
machine is stamped on the identifi-
cation plate (fig. 1/1) and on the
right of the undercarriage (fig. 1/2),
as seen in the direction of travel.
1.6 Environmental standards

When operating or working on the machine
the environmental standards currently valid Fig. 1 Vehicle identity number
must be observed at all times.
When performing installation, maintenance 1.7 Notes on using the instruction book
and repair work, special care must be taken to 1.7.1 References to pictures and items
ensure that ecologically harmful substances
such as The references to pictures and items con-
tained in the text, such as (14/1), for example,
lubricating oil and grease
mean figure 14, item 1.
hydraulic oil
fuel 1.7.2 Dangers and important notes
coolant
liquid detergents containing solvent DANGER
do not seep into the ground or the sewerage This symbol is employed for a high
system. risk of injury to persons. It is essen-
tial that the safety notes are ob-
These substances must be kept, transported,
served.
collected and disposed of in suitable contain-
ers.
If above-mentioned liquids seep into the
Warning
ground, their escape must be stopped imme- This symbol is employed for infor-
diately and the liquid be bound with suitable mation whose non-compliance may
binding agents. If necessary, the contami- lead to severe material damage. It
nated soil must be excavated. Binding agents is essential that the safety notes are
and excavated material must be disposed of observed.
in the proper manner. The environmental
standards currently valid must be observed. Note
This symbol is employed for infor-
mation containing important notes
about the correct use and/or how to
proceed. Non-compliance may lead
to malfunction.
MHL 350 1.3

1 FOREWORD
1.7.3 Pictograms
The table below explains the meaning of the pictograms on the operator control panel.
Display Description Function Description

Symbol (Monitors) Symbol (Switch)
Direction indicator control lamp Working floodlight(s)
Battery charge indicator Lower beam
Engine oil pressure Cab up/down
Central lubricating system

Parking brake Trigger additional lubrication
Pre-heating Work zone extension
Engine air filter clogging indicator Speed range 1st/2nd gear
in an emergency only: discon-

Brake pressure of service brake nect thermo switch
disable all work functions
Hydraulic oil temperature Windshield wash/wipe
CEB-control Overload warning device
Coolant level indicator lamp Magnet system
Coolant temperature Auto-idling system
Fuel level Hazard warning system
Oscillating axle lock/

Operating hour meter Oscillating axle lock release
1.4 MHL 350

FOREWORD 1
The table below explains the meaning of the pictograms on the machine.
Symbol Description Symbol Description
Safety distance Hydraulic oil
Danger of injury Fuel
Lashing point Suspension point for loading by

crane
No pressure jet!
MHL 350 1.5

1 FOREWORD
1.8 Operating instructions provided by

outside suppliers
The operator must also observe operating
instructions covering components from out-
side suppliers. Reference is made to these
operating instructions in the FUCHS instruc-
tion book.
Operating instructions Manufacturer

Diesel engine BF 6 M 1013 E Deutz
Central lubricating system Lincoln
optional:
Generator EME
Supplementary heating Eberspcher
Air conditioning Wlfle
Overload cut-off Krger
1.9 Copyright
This instruction book is the copyright of the
Fuchs-Bagger GmbH & Co. KG Maschinen-
fabrik. This instruction book is intended for
use by personnel responsible for operation,
maintenance, repair and supervision of the
machine.
This instruction book may not, either in whole
or in part, be reproduced, transmitted or used
for the purpose of competition without our
prior written permission.
1.10 Company address

1.10.1 Headquarters / Sales and Customer Service
Fuchs-Bagger GmbH & Co. KG Maschinenfabrik
Postfach 1161 Industriestrae 3
D-76662 Bad Schnborn D-76669 Bad Schnborn
Telephone: +49-7253-84-0
Facsimile: +49-7253-84-411
1.10.2 Spare parts

Schaeff Ersatzteile Service GmbH & Co. KG
Postfach 1264 Erlbacher Strae 115
D-91534 Rothenburg D-91541 Rothenburg
Telephone: +49-9861-972-0
Facsimile: +49-9861-972-410
Reference number: 5 781 120 707

Vehicle identity number: 350/0493>
1.6 MHL 350

TABLE OF CONTENTS
Page
2 SAFETY AND ACCIDENT PREVENTION
2.1 Introductory remarks..................................................................................................... 2.1
2.2 General safety notes..................................................................................................... 2.1
2.3 Operation...................................................................................................................... 2.2
2.4 Danger zone ................................................................................................................. 2.2
2.5 Transport of persons .................................................................................................... 2.2
2.6 Stability ......................................................................................................................... 2.3
2.7 Travel operation............................................................................................................ 2.3
2.8 Loading and unloading ................................................................................................. 2.4
2.9 Guides .......................................................................................................................... 2.4
2.10 Danger of falling objects ............................................................................................... 2.4
2.11 Working in the vicinity of overhead power lines ............................................................ 2.5
2.12 Operation in closed rooms ............................................................................................ 2.5
2.13 Work stoppages ........................................................................................................... 2.6
2.14 Crane operations .......................................................................................................... 2.6
2.15 Assembly, maintenance, repair..................................................................................... 2.7
2.16 Recovery, transportation............................................................................................... 2.8
2.17 Monitoring and inspections ........................................................................................... 2.8
2.18 FOPS roof guard to DIN ISO 3449-II ............................................................................ 2.9
2.19 FOPS / front guard to DIN ISO 10262 .......................................................................... 2.9
2.20 Emergency exit ............................................................................................................. 2.9
2.21 Other dangers............................................................................................................... 2.9
2.21.1 Failure of the hydraulic system .............................................................................. 2.9
2.21.1 Elevating cab ......................................................................................................... 2.9
2.21.2 Working operation ................................................................................................. 2.9
MHL 350
SAFETY AND ACCIDENT PREVENTION 2
2.1 Introductory remarks Protective work clothing must be worn during

operation. Rings, scarves and unbuttoned
This section contains information for the safe
jackets are to be avoided. Protective
operation of loading machines.
goggles, protective boots, helmets, gloves,
National safety regulations e.g. the reflecting jackets, ear-muffs, etc. may be
Accident Prevention Regulations, Earth- required.
Moving Machinery (VBG 40) and Vehicles
Before commencing work, information must
(VBG 12) in the Federal Republic of
be obtained on first aid and possible means
Germany must also be complied with.
of rescue (ambulance, fire brigade,
In addition to the operating instructions, legal helicopters).
regulations governing road traffic and road
The fire extinguisher (max. 4 kg) is located in
safety measures must also be observed.
the drivers cab on the rear left-hand pillar.
Such requirements could also apply in
Personnel must be aware of the operation of
respect of handling hazardous goods or the
the fire extinguisher as well as on-site fire-
wearing of personal safety gear, for example.
warning and fire-fighting equipment.
Furthermore, safety laws governing work in
Loose parts such as tools or other
particular locations (tunnels, adits, quarries,
accessories must be secured to the loading
pontoons, contaminated areas, etc.) must
machine.
likewise be observed.
2.2 General safety notes

It is important to refrain from any working
methods which impair safety.
The loading machine may only be used when
it is in a safe, operational condition.
The manufacturers instructions must be
complied with for operation, maintenance,
repair, assembly and transportation.
The plant operator must provide additional
special safety instructions, wherever
necessary, for specific local conditions.
The operating instructions and any
information pertaining to safety must be
carefully kept in the drivers cab.
The operating instructions and safety notes
must be complete and fully readable.
Safety devices on the loading machine must
not be deactivated or removed during
operation.
MHL 350 2.1

2.3 Operation If the above safety distance cannot be

maintained, the area between solid objects
Loading machines may only be
and the working zone of the loading machine
independently operated and serviced by
must be blocked off.
persons who
are physically and mentally suitable If conditions are such that the machine
operators view of the driving and working
have been instructed in the operation or zone is restricted, he must be guided or the
maintenance of the loading machine and driving and working zone must be marked by
have demonstrated this ability to the plant a solid barricade.
operator
can be expected to perform their allocated 2.5 Transport of persons
duties reliably The transport of passengers on the machine
is prohibited.
All such persons must be of the legal
minimum age.
They must be designated by the plant
operator to operate or service the loading
machine.
Operating equipment (controls) may only be
activated from the drivers cab or operator
console.
The loading machine may only be ascended
and entered using the entrances and
surfaces intended for this purpose. They
must be kept in good, safe condition.
2.4 Danger zone

No one may enter the danger zone of the
loading machine.
The danger zone encompasses the area
around the loading machine in which persons
may be injured by movements of the machine
during operation, its implements and
attachments, or by swinging out or falling
loads.
The machine operator must give a warning
signal to persons who may be in danger.
The machine operator shall stop work with
the loading machine if anyone remains in the
danger zone despite the warning.
To ensure no danger of crushing, a sufficient
safety distance (min. 500 mm) must be kept
from solid objects, e.g. buildings, excavation
slopes, scaffolding, other machines, etc.
2.2 MHL 350

2.6 Stability Before driving downhill, the appropriate gear

for the terrain must be selected and the gear
Loading machines must be used, driven and
lever shall not be moved during downhill
operated in such a manner that their stability
travel (on-road or off-road gear).
against overturning is ensured at all times.
Loading machines may only be driven on the
The machine operator must drive at speeds
open road when the machine and the driver
which are suitable for local conditions, and
both have the appropriate license as required
must keep the loading equipment as close to
by the country in question.
the ground as possible when working/driving
on sloping or uneven ground.
The MHL 350 is not licensed for use
The permitted payload of the loading on the road, and therefore shall not
machine shall not be exceeded. be driven on public highways in
Germany.
Loading machines must remain at a sufficient
distance from the edges of quarries, pits, Outside areas covered by general traffic
mounds and slopes to ensure there is no risk regulations, e.g. on construction sites, traffic
of falling. regulations should be applied in the proper
Loading machines must be secured so that manner. This should also apply with regard to
they cannot roll or slip when in the vicinity of drivers licenses.
excavations, shafts, ditches, pits and slopes.
2.7 Travel operation

Before putting the loading machine into
operation, the drivers seat, mirrors and
controls must be adjusted so as to ensure
safe working.
The windows must be clean and free of ice.
Driving tracks must be designed so as to
ensure smooth, safe operation, i.e. they must
be sufficiently wide, on ground which has
sufficient carrying capacity and as few slopes
as possible.
Downhill tracks must be set out in such a way
that loading machines can be safely braked.
The carrying capacity of bridges, cellar roofs,
vaults, etc. must be verified before the
loading machine can drive over them.
The internal dimensions of constructions
must be noted before entering underground
passages, tunnels, etc.
On steep drops and uphill gradients, the load
must be carried on the uphill side, if possible,
in order to increase stability.
MHL 350 2.3

2.8 Loading and unloading Demolition work may only be performed by

loading machines where there is no danger
The machine operator may only swing the
to persons and if the machine is equipped
loading equipment over occupied drivers
with canopy (overhead guard), front guard on
seats, operator consoles and workplaces of
the cab and the appropriate work implement.
other machines when these are protected by
overhead guards (FOPS).
If a cab does not have the required
protection, the driver of this vehicle must
leave the drivers seat when the loading
equipment has to be slewed overhead.
The vehicles must be loaded in such a
manner as to ensure that there is no
overloading and no material can be lost
during travel. The vehicle must be loaded
from the lowest possible height.
At dumping points, loading machines may
only be operated when suitable measures
have been taken to prevent rolling or falling.
2.9 Guides
Guides must be easily recognizable, e.g. by
means of warning clothing. They must
remain within the machine operators field of
vision.
For better communication between the
machine operator and the guide signals must
be agreed upon. These must only be given
by the machine operator and the guide.
While guiding the machine, guides must not
be given other jobs which may distract them
from their task.
2.10 Danger of falling objects

Loading machines may only be used where
there is a danger of falling objects when the
drivers seat and operator consoles have an
overhead guard (FOPS). A front guard must
be employed if there is a risk of materials
breaking into the cab.
In front of walls e.g. of stacked materials,
loading machines must be positioned and
operated in such a way that the drivers seat
and entry to the drivers seat are not situated
on the side facing the wall.
2.4 MHL 350

2.11 Working in the vicinity of overhead 2.12 Operation in closed rooms

power lines
If loading machines are used in closed rooms,
When the loading machine is being used in these areas must be sufficiently ventilated and
the vicinity of overhead power lines and trolley the special regulations observed.
wires, a safety distance which varies
depending upon the nominal voltage of the
overhead line must be maintained between
the lines and the loading machine and its
loading equipment, in order to prevent current
overspill. This also applies to the distance
between these lines and attached implements
or loads.
The safety distances specified below must be
complied with:
Nominal voltage Safety distance in

meters
1000 V 1.0 m
over 1 kV 110 kV 3.0 m
over 110 kV 220 kV 4.0 m
over 220 kV 380 kV 5.0 m
nom. voltage 5.0 m
unknown
In the observation of safety distances, all

working movements of the loading machine,
e.g. positions of the boom, swinging ropes
and the dimensions of attached loads must be
taken into consideration. Uneven ground
which would cause the loading machine to be
inclined and thus nearer to overhead lines
must also be taken into account.
During work in windy conditions, both
overhead lines and loading equipment may
swing out, thus reducing the safety distance.
If it is impossible to maintain sufficient
distance from overhead power lines and
trolley wires, the plant operator must consult
with the proprietor or operator of the overhead
lines to find other safety precautions to
prevent current overspill. Such measures
could be, e.g.
Switching off the current
Re-routing the overhead line
Cabling, or
Limiting the work zone of loading machines.
MHL 350 2.5

2.13 Work stoppages If a loading machine is to be equipped for

crane operations, an overload warning device
Before rest periods and at the end of the
and hose-rupture safety valves on the lift
working day, the driver of the loading machine
cylinders and, if necessary, a load hook must
must park the machine on ground which has
be installed.
sufficient carrying capacity and is as even as
possible, and must secure it against During crane operations the following points
movement. must be observed:
Before rest periods and at the end of the Loads must be attached in such a way that
working day, the driver must lower loading they cannot slip or fall out.
equipment onto the ground or secure it so that
Personnel guiding the machine and
it cannot move about.
attaching loads shall remain only in the
The driver may not leave the loading machine machine operators field of vision.
when loading equipment has not been
lowered to the ground or secured. The machine operator must carry loads as
close to the ground as possible and prevent
Loading machines may only be parked in them from swinging.
places where they do not present an obstacle,
e.g. on the construction site or to plant traffic. Loading machines may only travel with an
Warning devices, e.g. triangles, warning attached load if the path of travel is fairly
cordons, flashing or hazard lights are to be even.
used if necessary. Personnel attaching loads shall only
Before leaving the control console, the driver approach the machine and the boom from
must bring all loading equipment into home the side and with the machine operators
position and apply the brakes. permission.
If the driver is leaving the loading machine The machine operator may only give his
unattended, he must first turn off the drive permission if the loading machine is
motors and ensure that they cannot be started standing still and the work equipment is not
up by unauthorized persons. in motion.
Do not use fixing devices (ropes, chains)
2.14 Crane operations which are damaged or of inadequate
Crane operations are the hoisting, dimensions.
transporting and lowering of loads with the aid Protective gloves must always be worn
of a fixing device (rope, chain, etc.), whereby when working with fixing devices.
the assistance of personnel is required to
attach and release the load.
Loading machines may only be used for crane
operations when the prescribed safety devices
are present and in full working order.
According to the EEC-Machinery Directives
and Euronorm EN 474-5 of June 1996, these
are:
Overload warning device
Hose-rupture safety valves on the lift
cylinders *
Table of carrying capacity in the cab
Secure attachment of loading implements
(e.g. crane hook or shackle)
* only if carrying capacity exceeds 1,000 kg
2.6 MHL 350

2.15 Assembly, maintenance, repair When disconnecting the battery, first the
negative pole then the positive pole must be
Loading machines may only be assembled,
disconnected. The battery must be re-
converted or disassembled under the
connected in reverse order.
guidance of a suitable person designated by
the plant operator and following the During repair work around the battery, the
manufacturers operating instructions. latter must be covered with insulating
material; tools must not be deposited on the
Work on braking, steering, hydraulic and
battery.
electric systems of the loading machine may
only be carried out by expert personnel Protective devices of moving machine parts
specially trained in these areas. may only be opened or removed when the
drive has been switched off and cannot be
Stability must be ensured at all times during
switched on again by unauthorized persons.
work on loading machines.
Protective devices are e.g. engine/motor
The work equipment must be secured against
covers, doors, protective grating, trim.
movement by lowering them to the ground or
equivalent measures, e.g. stays, trestles. If Upon completion of assembly, maintenance
necessary, the revolving uppercarriage of the or repair work, all protective devices must
loading machine must be secured so that it once more be attached in the proper manner.
cannot swivel round.
Load-bearing parts of the machine may only
Counterweights may only be attached at the be welded following consultation with the
locations designated by the manufacturer. manufacturer and in accordance with
recognized welding principles.
When jacking up loading machines, jacking
devices must be positioned so that they Overhead guards (FOPS) shall not be welded
cannot slip. Jacks must be positioned and or drilled in any way.
applied absolutely straight, without tilting.
Alterations, such as welding of the hydraulic
Raised loading machines must be supported system, shall only be undertaken with the
by suitable structures such as crosswise manufacturers permission.
stacks of planks, square timbers or steel
Before commencing work on the hydraulic
trusses.
system, the pilot pressure, back pressure and
Loading machines which are raised with work pressure inside the tank must be let off.
equipment must be stabilized by a supporting
Only the hoses specified by the manufacturer
structure immediately after lifting. Do not work
may be used.
under raised loading machines which are only
supported by the hydraulics. Hydraulic hoses must be routed and
assembled by expert personnel.
The engine/motor must be turned off prior to
all maintenance and repair work. When filling the tank, smoking and naked
flames are prohibited.
These requirements may only be ignored in
the case of maintenance or repair work which
cannot be performed without the engine/motor
running.
Before working on the electrics or when
performing arc-welding on the machine, the
connection to the battery must be interrupted.
MHL 350 2.7

2.16 Recovery, transportation Hydraulic hoses must be replaced as soon as

the following damages are recognized:
Loading machines may only be loaded onto
recovery vehicles when adequate fixing Damages to the outer layer which reach the
devices are used. intermediate layer.
Fixing devices specified by the manufacturer, Embrittled patches on the outer layer.
e.g. eyes, hooks, must be employed.
Deformations when under pressure or
For loading and transportation, loading without pressure which differ from the
machines and all necessary auxiliary original shape of the installed hose.
equipment must be secured against unwanted
movement. Leaks
The traveling gear and track-laying gear of Damages to hose fittings or to the
loading machines must be sufficiently cleaned connection between the fitting and the hose.
of mud, snow and ice to ensure that ramps The coolant level shall only be checked when
can be driven up without risk of slipping. the engine has cooled down; the cap must
Before setting off, the route to be taken must be turned carefully in order to let off excess
be examined to determine whether the roads pressure.
are wide enough, entrances and passages Prior to crane operations, the machine
under bridges are large enough and that operator must check the function of the safety
roads and bridges have sufficient carrying devices specially required for this type of
capacity. work.
2.17 Monitoring and inspections The machine operator must advise the
supervisor immediately and his
The machine must be submitted to a general replacement, if there is a change of operator
inspection carried out by an expert: with regard to any shortcomings.
before the machine is put into operation for In the event of shortcomings which jeopardize
the first time and before the machine is the operating safety of the loading machine, it
again put into operation when essential shall not be used until these have been
modifications have been made eliminated.
at least once a year
in the meantime, according to operating
conditions and local environments
Furthermore, prior to each work shift, the
machine operator must check the function of
driving and working equipment in accordance
with the manufacturers instructions, see
chapter 4 Control and section 5 Work
Operation.
When work equipment is attached to quick-
change systems, the equipment in question
must be moved in all positions to ensure that
it is securely fastened; during this process, no
one shall be in the danger zone.
2.8 MHL 350

2.18 FOPS roof guard to DIN ISO 3449-II 2.21.2 Elevating cab
The cab features four holes in the roof for When the elevating cab is lowered to its end
fastening a FOPS roof guard. This guard is a position, there is a danger to third parties of
special version for the applications in being crushed by the lift frame, as the driver
question. Test certificates to DIN ISO 3449-II (operator) in the cab does not have a
can be obtained from the manufacturer. complete view of the area beneath him.
This also applies to the emergency lowering
2.19 FOPS / front guard to DIN ISO 10262
function of the elevating cab through the ball
The cab features six holes on the front side valve located outside.
and in the roof for fastening the roof guard
When driving with the cab raised, even small
with front guard. Test certificates to DIN ISO
irregularities in the ground cause the cab to
10262-1998 and SAE I 1356-February 88
dip. This may result in injuries of the driver
can be obtained from the manufacturer.
(operator) or to incorrect operation of the
machine.
2.20 Emergency exit
The front window acts as an emergency exit.
While the cab is being moved, and
If a front roof guard is fitted or this exit can no
during driving and working, the left-
longer be used for any other reason, the rear
hand armrest must be folded down
window must be used as an emergency exit.
and the cab door shut.
An emergency hammer is affixed inside the
drivers cab on the rear right-hand pillar.
2.21.3 Working operation
2.21 Other dangers When loading long and thin parts such as
tubes, pipes, bars, which stand out of the
loading grab, these parts may break into the
Danger drivers cab despite protective grating (front
guard) when the loading grab swings out
2.21.1 Failure of the hydraulic system strongly.
If the standstill of the diesel engine, a defect

of the hydraulic pump or the loss of hydraulic
oil leads to the failure of the hydraulic
system, only the following emergency
functions remain possible:
manual steering (not servo-assisted)
lower work equipment (only if ignition is
switched on)
MHL 350 2.9

Notizen Notes Annotazioni Notas
2.10 MHL 350

TABLE OF CONTENTS
Page
3 TECHNICAL DATA
3.1 Dimensions................................................................................................................... 3.1
3.2 General structure.......................................................................................................... 3.2
3.3 Engine .......................................................................................................................... 3.3
3.4 Electrical system........................................................................................................... 3.3
3.5 Travel drive................................................................................................................... 3.3
3.6 Brakes .......................................................................................................................... 3.3
3.7 Hydraulic system .......................................................................................................... 3.4
3.8 Axles............................................................................................................................. 3.4
3.9 Tires ............................................................................................................................. 3.4
3.10 Heating ......................................................................................................................... 3.5
3.11 Permissible loads.......................................................................................................... 3.5
3.12 Sound level values according to directive 2000/14/EC and ISO 6395 appendix A ........ 3.5
3.13 Vibrations...................................................................................................................... 3.5
3.14 Control.......................................................................................................................... 3.5
3.15 Working zone of the machine ....................................................................................... 3.6
3.15.1 Working envelope (13.5 m loading equipment)...................................................... 3.6
3.15.2 Table of carrying capacity (13.5 m loading equipment) .......................................... 3.7
3.15.3 Working envelope (15 m loading equipment)......................................................... 3.8
3.15.4 Table of carrying capacity (15 m loading equipment) ............................................. 3.9
3.16 Work attachments ........................................................................................................ 3.10
3.16.1 Other equipment (optional) .................................................................................... 3.10
3.17 Filling quantities ............................................................................................................ 3.11
3.18 Fuel, lubricant and coolant specifications...................................................................... 3.12
3.18.1 Alternative recommendations for other temperature ranges .................................. 3.12
3.18.2 Biodegradable hydraulic oils .................................................................................. 3.13
MHL 350
TECHNICAL DATA 3
3.1 Dimensions
Fig. 2 Dimensions
Fig. 3 Dimensions
MHL 350 3.1

3 TECHNICAL DATA
3.2 General structure
1 Front axle (steering)

2 Rear axle (oscillating)
3 Power shift transmission with
travel motor
4 4-point outriggers
5 Counterweight
6 Lift cylinder
7 Elevating cab
8 Cab lift frame
9 Box-type boom
10 Dipperstick cylinder
11 Dipperstick
12 Cactus grab
Fig. 4 General structure
3.2 MHL 350

TECHNICAL DATA 3
3.3 Engine
Make Deutz
Type BF 6 M 1013 E
Design Water-cooled in-line 6-cylinder engine with

turbocharger
Power to DIN 70020 122 kW at n = 2,000 rpm

auto-idling system
Cooling system Electrical coolant level monitor, radiator drive

via viscous clutch
3.4 Electrical system

Operating voltage 24 V
Battery 2 x 12 V (series-connected) = 24 V 95 Ah
Generator 28 V 55 A
Starter 24 V 4.0 kW
3.5 Travel drive Infinitely variable speed drive via variable dis-
placement motor.
2-gear power shift transmission
Continuous speed regulation forward and in
reverse in both gear ranges:
st
1 gear 0 5.5 km/h
nd
2 gear 0 20 km/h
Power transmission Variable displacement motor with 2-gear

power shift transmission
Four-wheel drive via propeller shaft connec-
tion
Gradability 45 % in low gear
Turning radius 8.2 m
Operating pressure 320/360 bar
3.6 Brakes
Service brake Hydraulic power-assisted braking system act-
ing on all four drum brakes.
The hydrostatic drive acts as an additional,
non-wearing service brake on all wheels by
means of four-wheel drive.
Parking brake Hydraulic disc brake acting on the 2-gear

power shift transmission.
Slewing brake Non-muscular-energy slewing brake, pedal

can be locked in place
MHL 350 3.3

3 TECHNICAL DATA
3.7 Hydraulic system

Main circuit (axial piston pump) Max. pump capacity : max. 580 l/min
Operating pressure : 320/360 bar
Auxiliary circuit: Single gear pump Pump capacity : 41 l/min

Dual gear pump + 24 l/min + 4.5 l/min
Swing assembly The uppercarriage is driven by an internally

toothed ring gear and a planetary transmis-
sion with integrated multi-disc brake. Lubrica-
tion of the toothing through central lubrication
system.
Swing range : 360 unlimited
Uppercarriage swing speed : 0 8 rpm
Steering Pump capacity : 24 l/min

Steering pressure : 175 bar
Hydrostatic power-assisted steering system
Max. steering angle : 27
Oil radiator Separate oil radiator which is activated at an

oil temperature of 45 C; drive of the ventilator
via a hydraulic motor.
3.8 Axles
Front axle Rigid steering axle, with drum brakes
Rear axle Oscillating, with hydraulic oscillating lock and

drum brake, angle of oscillation 7
3.9 Tires
Tire size Type Arrangement of tires

12.00-20 elastic twin tires
8-fold
3.4 MHL 350

TECHNICAL DATA 3
3.10 Heating
Heating Three-stage fan/hot-water heater and ventila-
tion, adjustable defroster nozzle
3.11 Permissible loads

Permissible gross vehicle weight 30,000 kg
Permissible axle load, front 18,000 kg
Permissible axle load, rear 18,000 kg
3.12 Sound level values according to directive 2000/14/EC and ISO 6395 appendix A
The machine has CE-approval (confirmed by German Civil Engineering Trade Association) and
fulfills EC-Type Examination standards according to the Dynamic Measuring Method.
Representative values measured on the model
sound power level: LWA = 104.2 dB(A)
Guaranteed sound power level: LWA = 106 dB(A)
Sound pressure level, drivers seat: LpA = 74 dB(A) *
* This value is smaller than the permissible limit value of LpA = 85 dB(A).
3.13 Vibrations
Weighted r.m.s. value of acceleration of upper limbs is below 2.5 m/s.
Weighted r.m.s. value of acceleration of seat area and feet is below 0.5 m/s.
3.14 Control
The loading machine is equipped as standard with an ISO control (see chapter 5.1).
MHL 350 3.5

3 TECHNICAL DATA
3.15 Working zone of the machine

3.15.1 Working envelope (13.5 m loading equipment)
- Work equipment: box-type boom 7.4 m, dipperstick 5.8 m and cactus grab
Fig. 5 Working envelope (13.5 m loading equipment)
3.6 MHL 350

TECHNICAL DATA 3
3.15.2 Table of carrying capacity (13.5 m loading equipment)

The carrying capacity values are stated in tons (t). The pump pressure for this table is 360 bar.
The values amount to 75 % of the static overturning limit or 87 % of the hydraulic lifting force, in
accordance with ISO 10567.
When the machine is standing on solid, even ground, the values apply to slewing operation
through 360. The values in brackets apply in the lengthwise direction of the undercarriage. The
outriggers up values only apply when the load is lifted above the front or rear axle respectively.
The weight of the attached load hoisting implement (grab, magnet, lift hook, etc.) must be
deducted from the carrying capacity values. If a FUCHS quick-mount hitch is mounted on
the boom, carrying capacity values are reduced by 300 kg.
Key to symbols: Limited by lift cylinders
Limited by dipperstick cylinders
In accordance with CE guidelines, hose-rupture safety valves on the lift cylinders and an overload
warning device are required for crane operations.
Fig. 6 Table of carrying capacity (13.5 m loading equipment)
MHL 350 3.7

3 TECHNICAL DATA
3.15.3 Working envelope (15 m loading equipment)

- Work equipment: box-type boom 8.2 m, dipperstick 6.5 m and cactus grab
Fig. 7 Working envelope (15 m loading equipment)
3.8 MHL 350

TECHNICAL DATA 3
3.15.4 Table of carrying capacity (15 m loading equipment)

The carrying capacity values are stated in tons (t). The pump pressure for this table is 360 bar.
The values amount to 75 % of the static overturning limit or 87 % of the hydraulic lifting force, in
accordance with ISO 10567.
When the machine is standing on solid, even ground, the values apply to slewing operation
through 360. The values in brackets apply in the lengthwise direction of the undercarriage. The
outriggers up values only apply when the load is lifted above the front or rear axle respectively.
The weight of the attached load hoisting implement (grab, magnet, lift hook, etc.) must be
deducted from the carrying capacity values. If a FUCHS quick-mount hitch is mounted on
the boom, carrying capacity values are reduced by 300 kg.
Key to symbols: Limited by lift cylinders
Limited by dipperstick cylinders
In accordance with CE guidelines, hose-rupture safety valves on the lift cylinders and an overload
warning device are required for crane operations.
Fig. 8 Table of carrying capacity (15 m loading equipment)
MHL 350 3.9

3 TECHNICAL DATA
3.16 Work attachments
Fig. 9 Grab
Fig. 10 Magnet Fig. 11 Lift hook
3.16.1 Other equipment (optional)

Overload warning device Dozer blade
Overload cut-off Cab guard
Boom height limitation Protective grid for working floodlights
Individual actuation of 4-point outriggers Bullet-proof glass for front windshield and
Hose-rupture safety valves of lift cylinders the skylight
Hose-rupture safety valves of dipperstick Diverse electrical accessories such as addi-
cylinders tional working floodlights, rotating beacon,
Magnet system radio, etc.
Air conditioning
Supplementary heating
Further supplementary equipment available on request.
FUCHS products may not be modified or fitted with supplementary equipment or work
attachments which are not included in our delivery range without our express written
permission. Without such permission our warranty expires, as does our product liability
for any resulting consequential damages.
3.10 MHL 350

TECHNICAL DATA 3
3.17 Filling quantities
Designation Filling quantity Fluid Remarks

Fuel tank 350 l Diesel
Engine oil 20 l HD oil First filling: 21 l
Hydraulic oil tank 380 l Hydraulic oil Change quantity
Front axle 16 l Transmission oil
per planetary gear train 1.5 l Transmission oil
differential 13 l Transmission oil
Rear axle 22.2 l Transmission oil
per planetary gear train 1.6 l Transmission oil
differential 19 l Transmission oil
Power shift transmission 5.5 l Transmission oil
Swing gear 10 l Transmission oil
Grease lubrication system 3 kg Lubricating grease
Service brake Supplied by hydraulic system
Oil-immersed air filter (heater) 0.16 l Engine oil only when supplemen-
tary heating fitted
Cooling system 36 l Water-glysantine
mixture
Windshield wash system 2l Water with wind-
shield detergent
Grab gear 0.7 l Transmission oil
The level marking is always the decisive factor for the correct filling quantity, not the
values stated above.
MHL 350 3.11

3 TECHNICAL DATA
3.18 Fuel, lubricant and coolant specifications

Prescribed fuels, lubricants and
coolants for Central Europe
Application Code designation Designation Specification, Remarks
according to Bi 1) Standards, Quality
Engine Diesel fuel DIN 51601 Before using RME-fuels (rape oil
ASTM D975 1-D/2-D methyl ester), it is essential to
consult your responsible FUCHS
dealer for further details.
Engine EO 1540 A Engine oil SAE 15W-40 See also engine manufacturers
API CF 4 instructions
Cooling for engine SP-C Coolant Clean water and anti- See also engine manufacturers
freeze based on ethyl- instructions
ene glycol
Hydraulic working HYD 0530 Hydraulic oil or H-LP 46 The following viscosity limit val-
circuits multi-grade oil or ues must be kept (according to
ASTM 445)
SAE 5W-30 2
at 100 C min. 7 mm /s (cSt)
2
at -10 C approx. 1,000 mm /s
(cSt)
BIO-E-HYD-HEES Biodegradable Filling according to The same viscosity specifications
hydraulic oil on customer specifica- apply as for mineral hydraulic
synthetic ester tions. Brand label on oils.
base machine. When changing from mineral to
Do not mix biodegrad- biodegradable hydraulic oils, the
able oils of different tank and hydraulic system must
suppliers. be completely drained, cleaned
and flushed.
For further details before chang-
ing oils, please consult your
FUCHS dealer.
Transmission(s), GO 90 LS Transmission SAE 80W-90LS Alternative recommendations:

wheel hubs, axles, oil API-GL 5 SAE 90 LS
grab and magnet
gears SAE 85W-90 LS
Grease lubrication MPG-A Multi-purpose, KP2N-30

system, other lithium-soap DIN 51825
lubricating points based grease
Ring gear of slew- Lubrication via grease lubrication
ing joint system
1)
In conformity with the regulation lubricants of the Main Association of the German Building Industry e.V.
3.18.1 Alternative recommendations for other temperature ranges
Engine oil according to API CG 4 or CF 4 and Hydraulic oil according to DIN 51524.T3 HLP
to ACEA E3 or E2
3.12 MHL 350

TECHNICAL DATA 3
3.18.2 Biodegradable hydraulic oils

We recommend biodegradable hydraulic oils
based on synthetic ester as an alternative to
mineral oils. The same viscosity limit values
apply as for mineral oils.
When changing from mineral to

biodegradable hydraulic oil, the sys-
tem and the tank must be com-
pletely drained, cleaned and
flushed.
Do not mix biodegradable oils of
different suppliers.
Before changing oils, please ask your FUCHS
dealer for more details.
MHL 350 3.13

3.14 MHL 350

TABLE OF CONTENTS
Page
4 CONTROL
4.1 First commissioning ...................................................................................................... 4.1
4.2 Operator controls in cab ............................................................................................... 4.2
4.3 Operator control panel in cab........................................................................................ 4.4
4.4 Engine .......................................................................................................................... 4.6
4.4.1 Starting the engine................................................................................................. 4.6
4.4.1.1 Normal start / hot start .................................................................................... 4.6
4.4.1.2 Cold start with glow plug ................................................................................. 4.6
4.4.2 Monitoring during operation ................................................................................... 4.7
4.4.2.1 Deactivating the overheat protection ............................................................... 4.7
4.4.3 Switching off the engine......................................................................................... 4.7
4.4.4 CEB-control ........................................................................................................... 4.7
4.4.4.1 Auto-idling system........................................................................................... 4.8
4.4.4.2 Fine Mode ....................................................................................................... 4.8
4.4.4.3 Kick-down function .......................................................................................... 4.8
4.4.5 Notes for use in winter ........................................................................................... 4.8
4.5 Operator's stand ........................................................................................................... 4.9
4.5.1 Driver's seat ........................................................................................................... 4.9
4.5.2 Steering wheel position .......................................................................................... 4.9
4.6 Ventilation and heating ................................................................................................. 4.10
4.6.1 Hot water heating................................................................................................... 4.10
4.6.2 Supplementary heating (optional) .......................................................................... 4.10
4.6.3 Air conditioning (optional)....................................................................................... 4.11
4.7 Driver's cab................................................................................................................... 4.12
4.7.1 Opening/closing the windshield.............................................................................. 4.12
4.7.2 Sunblind................................................................................................................. 4.12
4.7.3 Cab door ................................................................................................................ 4.12
4.7.4 Door window .......................................................................................................... 4.13
4.7.5 Skylight of diver's cab ............................................................................................ 4.13
4.7.6 Interior lighting of driver's cab ................................................................................ 4.13
4.7.7 Windshield wash/wipe system ............................................................................... 4.13
4.8 Cab with hydraulic elevation ......................................................................................... 4.14
4.8.1 Before putting into operation.................................................................................. 4.14
4.8.2 During operation .................................................................................................... 4.14
4.8.3 Driving with elevated cab ....................................................................................... 4.14
4.8.4 Switching off the machine ...................................................................................... 4.14
4.8.5 Positioning the cab................................................................................................. 4.15
4.8.6 Procedure for manual lowering of elevated cab (in case of malfunction)................ 4.15
4.9 Driving .......................................................................................................................... 4.16
4.9.1 Driving off .............................................................................................................. 4.16
4.9.2 Coming to a halt..................................................................................................... 4.17
4.9.3 Steering ................................................................................................................. 4.17
4.9.4 Braking .................................................................................................................. 4.17
4.10 Parking the machine ..................................................................................................... 4.18
MHL 350
CONTROL 4
4.1 First commissioning

If you are not familiar with the operating and
display elements of this machine, read this
chapter carefully before operating the ma-
chine.
This chapter deals with all functions.
Before driving and working with the machine it
is necessary to thoroughly familiarize yourself
with the display elements and operator con-
trols.
Each time before putting the machine into
operation it must be subjected to a thorough
visual inspection. Take care to ensure that
there are no damages, loose or missing
screws, oil accumulations, oil or fuel leakages.
Defects must be remedied immediately. In the
event of shortcomings which jeopardize the
operating safety, the machine shall not be put
into operation until these have been elimi-
nated.
Each time before putting the machine into
operation, the inspections according to chap-
ter 7.3 must be carried out.
MHL 350 4.1

4 CONTROL
4.2 Operator controls in cab
Fig. 12 Operator controls
4.2 MHL 350

CONTROL 4
Operator controls in cab

1 = Lever for outriggers up/down
2 = Fine Mode potentiometer
3 = Emergency lowering of cab
4 = Four-way control lever (ISO control)
5 = Push-button for magnet device (optional)
6 = Upward folding armrest
7 = Push-button for kick-down function
8 = Slewing brake pedal, can be locked in place
9 = Service brake pedal, can be locked in place
10 = Accelerator pedal, forward
11 = Accelerator pedal, reverse
12 = Height adjustment of steering wheel
13 = Tilt adjustment of steering wheel
14 = Turn signal flasher
15 = Horn
16 = Four-way control lever (ISO control)
17 = Push-button for grab rotation
18 = Engine speed control lever
19 = Parking brake (hand brake)
Lever forward brake released; lever backward brake applied
20 = Push-button for raising the operating pressure
21 = Control knob for fresh air/air conditioning circulating air (optional)
22 = Operator control panel for supplementary heating (optional)
MHL 350 4.3

4 CONTROL
4.3 Operator control panel in cab
Fig. 13 Operator control panel
4.4 MHL 350

CONTROL 4
Operator control panel in cab 58 = Push-button for triggering additional

lubrication
25 = Ignition lock
59 = Magnet device indicator lamp
26 = Toggle switch for overload warning
(optional)
device (optional)
60 = Magnet device toggle switch (optional)
27 = not assigned
61 = not assigned
28 = Toggle switch for auto-idling system
62 = not assigned
29 = Generator voltage gauge (optional)
63 = Air conditioning indicator lamp
30 = not assigned
(optional)
31 = Switch for windshield wiper
64 = Rotary knob for air conditioning
(upper window section)
(optional)
Position 1, bottom : windshield wiper
Position 1, top : intermittent 65 = Rotary knob for hot water heating
Position 2, top : wash/wipe 66 = Hazard warning system toggle switch
32 = Toggle switch for windshield wiper, 67 = not assigned
wash/wipe (lower window section) 68 = not assigned
33 = Toggle switch for working floodlight(s) 69 = not assigned
34 = Push-button for cab up/down 70 = not assigned
35 = Toggle switch for work zone 71 = Turn signal indicator
extension
36 = Toggle switch for disabling work
functions
37 = Engine coolant temperature indicator
38 = Coolant level indicator lamp
39 = Fuel gauge
40 = Hydraulic oil temperature indicator
lamp
41 = Air filter clogging indicator lamp
42 = Service brake indicator lamp
43 = Coolant temperature indicator lamp
44 = Battery charge indicator lamp
45 = Engine oil pressure indicator lamp
46 = Rotary knob for fan
47 = Pre-heating indicator
48 = Parking brake indicator lamp
49 = CEB-control indicator lamp
50 = Indicator lamp for "work functions
disabled"
51 = Cigarette lighter
52 = Indicator lamp for work zone extension
53 = not assigned
54 = Operating hour meter
55 = Oscillating axle lock toggle switch
st nd
56 = 1 /2 gear toggle switch
57 = Headlamp toggle switch
MHL 350 4.5

4 CONTROL
4.4 Engine 4.4.1.2 Cold start with glow plug

Before starting the engine the battery discon- Insert the ignition key into the ignition lock
nect switch must be closed. This switch is (14/25).
located in front of the oil radiator.
Bring the engine speed control lever (14/18)
to full-throttle position.
Before switching on the engine, the
operator has to take care to ensure Turn the ignition key to I. After the pre-heat/
that no one is on the machine or in indicator lamp (14/47) has gone out, turn
the immediate vicinity of it. the ignition key to III to start the engine.
As soon as the engine starts running, turn
4.4.1 Starting the engine the ignition key back to I and lower the en-
gine revs to bottom-end idle speed. The in-
Every time the machine is put into dicator lamps (14/44, 14/45) should go out.
operation, the inspections described
If the engine does not start up after 15 sec-
in chapter 7.3 must first be per-
onds max., turn the ignition key to position I or
formed.
0 and, after waiting at least 30 seconds, re-
All gearshift levers to neutral. peat the start-up procedure.
Apply parking brake (hand brake) (14/19).

Do not drive the engine at full throttle
If, once the engine has been started, a buzzer right away. Drive with restraint until
sounds and the red service brake indicator the engine reaches operating tem-
lamp (14/42) lights up, the necessary braking perature.
pressure has not yet been built up.
Once the engine is running and the braking
pressure has built up, the buzzer stops and
the indicator lamp is extinguished.
4.4.1.1 Normal start / hot start

Insert ignition key in ignition lock (14/25).
Set the engine speed control lever (14/18)
to medium position.
Turn the ignition key clockwise to I. Indica-
tor lamps (14/44, 14/45, 14/47) on the op-
erator control panel light up.
After the pre-ignition indicator lamp (14/47)
has extinguished, turn the ignition key to
position III. As soon as the engine starts
running, turn the ignition key back to posi-
tion I and lower the engine revs to bottom-
end idle speed. The indicator lamps (14/44,
14/45) should go out.
Fig. 14 Starting the engine
4.6 MHL 350

CONTROL 4
4.4.2 Monitoring during operation 4.4.4 CEB-control

If the battery charge (15/44) or engine oil The machine is equipped with a CEB-control.
pressure (15/45) indicator lamps light up, This control includes
switch off the engine immediately and de- a load sensing control
termine the cause, or call for service per-
an electrical speed control
sonnel if necessary.
an auto-idling system
If the permitted coolant temperature of
approx. 110 C (15/37) is exceeded, the a sensitive adjustment of the pump re-
work and drive functions are deactivated. sponse characteristic (Fine Mode)
The indicator lamp (15/43) lights up. Open a kick-down function
the engine hood in order to let the engine The variable pump is controlled by the load
run at idle to cool down. Once the coolant sensing control and adjusted acc. to the mo-
temperature is within the permitted limits, mentary consumption of the consumers.
the deactivated functions are re-activated.
For possible malfunctions in the CEB-control
If the indicator lamp (15/38) lights up, there system, see chapter 8.1.5.
is not enough coolant in the engine cooling
system. Stop work immediately and replen-
ish coolant after the engine has cooled
down.
If the hydraulic oil exceeds the permitted
temperature, the indicator lamp (15/40)
lights up red. Work must be discontinued
immediately and the engine switched off.
For possible causes and remedies, see
chapter 8; if necessary, call for service per-
sonnel.
4.4.2.1 Deactivating the overheat protec-

tion
The overheat protection can be deactivated
using the push-button (15/36). The machine
can be relocated and the work equipment
moved.
As long as the overheat protection

is deactivated, the machine may
only be moved briefly as otherwise
damage to the engine may occur.
The deactivation only takes effect as long as
the push-button (15/36) is pressed.
4.4.3 Switching off the engine
Do not switch off the engine when

running at full throttle, but allow it to
run for a short time at no load.
Fig. 15 Switching off the engine
Bring the engine speed control lever (15/18)
to idle position.
Turn the ignition key (15/25) to 0. The en-
gine stops automatically.
MHL 350 4.7

4 CONTROL
4.4.4.1 Auto-idling system

When the loading machine is
The auto-idling system has the effect of lower- warmed up by the engine running at
ing the engine speed if there is no work ma- idle, the following guidelines apply:
neuver during the pre-set time of 3 seconds.
The auto-idling system can be switched on/ Temperature Warm-up time
off using the toggle switch (15/28). Once the in C in minutes
auto-idling system has been activated the
indicator lamp in the switch lights up. 0 C and over approx. 15 min
-18 C 0 C approx. 30 min
4.4.4.2 Fine Mode
below -18 C over 30 min
On the potentiometer (15/2) the flow rate of
the pump can be continuously adjusted be-
tween the settings Normal and Sensitive.
Engine oil
The viscosity class (SAE class) of the engine
Turn to the left ( 0): normal (max. flow
oil should be selected according to the ambi-
rate)
ent temperature at the machines place of
Turn to the right ( 100): sensitive (min. operation (see fuels, lubricants and coolants,
flow rate) chapter 3.18).
During normal working operations Battery

the potentiometer must be set to For good cold start performance, always keep
0. the battery fully charged. By warming up the
battery to approx. +20 C (remove the battery
4.4.4.3 Kick-down function after the engine has been turned off and store
it in a warm room), the starting temperature
With the kick-down function the engine can be
range can be lowered by approx. 4 5 C.
brought to max. speed by pressing the push-
button (15/7) in the left-hand four-way control When installing the battery, ensure good con-
lever. The function remains effective as long tact of terminal connections.
as the button is pressed.
Only tighten terminal screws so that they are
This function takes effect with the auto-idling hand tight in order to avoid deformation of
system both activated and deactivated. the terminal cones!
4.4.5 Notes for use in winter Fuel

The following points and the relevant notes Only use commercially available brand-name
in the instruction book of the engine manufac- diesel fuel with a sulfur content of less than
turer should be observed during use in win- 0.5 % (see chapter 3.18 "fuels, lubricants and
ter: coolants").
Only use brand-name diesel fuel with addi-
Hydraulic oil
tives for cold temperatures to prevent clog-
If the machine is not used for longer periods ging of the fuel system due to paraffin separa-
at temperatures around and below freezing, tion. Even if winter diesel fuel is used, disturb-
warm up the engine by running at medium ing paraffin separations (jelling) can occur at
speed. The operating temperature must be very low temperatures.
reached by performing the following work ma-
neuvers:
Raise/lower box-type boom
Open/close grab
Extend/retract dipperstick.
4.8 MHL 350

CONTROL 4
4.5 Operator's stand Tilt adjustment of steering column:

4.5.1 Drivers seat Press lever (17/13) forward using your foot
and adjust the desired tilt of the steering
The deluxe drivers seat is an air-cushioned
column. Set lever (17/3) to home position.
seat with shock absorbers.
Slightly move steering column back and
The seat satisfies international quality and forth until the lever (17/3) clicks in.
safety requirements.
(16/1) Rocker switch for upper and lower
lumbar support
tilt forward lumbar part round;
tilt backward lumbar part straight
(16/2) Handle for seat back adjustment (tilt)
(16/3) Handle for seat upholstery adjust-
ment (tilt)
(16/4) Handle for seat depth adjustment
(leg support)
(16/5) Handle for longitudinal adjustment of
seat (upper part)
(16/6) Lever for horizontal spring system
(reduces horizontal bouncing in the
travel direction)
lever locked in place backward
seat locked in place
lever set forward seat not locked
in place
(16/7) Handle for combined height and body
weight adjustment
Fig. 16 Drivers seat
press handle briefly: weight is ad-
justed automatically
raise or press lever: adjust height
(16/8) Handle for longitudinal adjustment of
entire seat assembly
(16/9) Two point safety belt (optional)
(16/10) Rocker switch seat heating (optional)
The two-point safety belt (lap belt)

must be fastened before commenc-
ing work.
4.5.2 Steering wheel position

Height adjustment of steering wheel:
The locking device is released using the
lever (17/12). Adjust the desired height of
the steering wheel. Re-lock the steering
wheel after adjustment.
Fig. 17 Steering wheel adjustment
MHL 350 4.9

4 CONTROL
4.6 Ventilation and heating

In order to ensure that the heater
4.6.1 Hot water heating functions correctly, the combustion
air is drawn off through the oil-
The cab heating is dependent upon the en-
immersed air filter (rear of cab). In
gine coolant temperature. The fan air flow is
the case of high exposure to dust,
routed through a heat exchanger whose tem-
the oil should be changed every
perature is regulated by the flow rate of the
100 operating hours (see chap-
coolant.
ter 7.5 and oil analyses, 7.1.1).
The heater is operated as follows:
The air is distributed and aimed as desired by
Adjust the desired level of heat using the adjusting the air vents (18/1), (18/2) and
rotary knob (20/65). Turn clockwise (18/3).
greater heat.
Adjust the desired fan setting using the ro-
tary knob (20/46).
Adjust the heating vents (18/1), (18/2) and
(18/3) as desired.
To ensure that the heater functions correctly,
the circulating air / fresh air is drawn off
through the air filter (rear of cab below drivers
seat).
In the case of high exposure to

dust, the filter matting should be
cleaned or changed every 100 op-
erating hours. See chapter 7.5.
Fig. 18 Heating and ventilation
Open the fan cover using the knob (18/21),
remove the filter matting, clean or replace if
required.
When re-fitting the matting, make sure that
the blue side of the matting shows to the in-
side to ensure optimum filtering of the circu-
lating air / fresh air.
4.6.2 Supplementary heating (optional)

Heating and ventilation can also be operated
when the engine is not running. Ignition does
not have to be switched on.
Heating is operated on the operator control
panel (18/22) in the right-hand armrest of the
drivers seat.
The functions and the operation of the heater
may be read up in the Operating Instructions
provided by the heater manufacturer.
The heating must always be

switched off when filling up with
fuel. The heating shall not be oper-
ated in enclosed spaces.
4.10 MHL 350

CONTROL 4
The heater is located in the drivers cab, on 4.6.3 Air conditioning (optional)
the right-hand side under a sheet-metal cover.
The air conditioning is switched on using the
The following maintenance tasks must be rotary knob (20/64). At the same time, the
carried out before each heating period: rotary knob (20/46) must be set to at least "1",
so that the air conditioning starts to operate.
Check the flame glow plug (19/1) for burn-
The indicator lamp (20/63) lights up.
off and replace if necessary.
Temperature is adjusted by operating the ro-
Examine the fuel filter for clogging and re-
tary knob (20/64):
place if necessary.
Turn clockwise increase in cooling per-
Check that electrical connections are se-
formance.
curely fastened.
Check that fuel lines and connections are
not leaking.
Check the oil level in the oil-immersed air
filter.
If the heating does not come on, proceed as

follows:
Switch heating off
Fig. 19 Heating
Check fuses
Switch heating on
If the heating still does not function when
switched on for the third time, please contact
the Customer Service of Messrs. Eber-
spcher. In the case of further unsuccessful
attempts, the heating is completely switched
off and cannot be switched on again.
If the heating overheats:

Concealed vents are a possible cause.
Switch heating off
Uncover vents
Switch heating on
Other malfunctions which cannot be remedied
by self-help measures shall be checked and
repaired by Customer Service only.
The battery disconnect switch shall

only be pressed approx. 5 minutes
after the heating has been switched
off. Otherwise, the heater cooling
process is interrupted, which can
lead to fire. Fig. 20 Air conditioning
The battery disconnect switch is located in

front of the oil radiator.
MHL 350 4.11

4 CONTROL
4.7 Drivers cab

4.7.1 Opening/closing the windshield
The windshield can only be opened com-
pletely, not in stages. The windshield is re-
leased from the catch by pressing in both re-
lease levers (21/1) and can be pulled in under
the cab roof.
Release the windshield from the catch by
pressing in the two release levers (21/1). It
can be brought back to the end position.
Always take care to ensure that the

windshield is locked in the end posi- Fig. 21 Opening/closing the windshield
tion.
When opening and closing the wind-
shield, take care to ensure that the
window does not collide with the
steering wheel. If it does, alter the
position of the steering wheel.
At customer's request the front wind-
shield and the skylight may be made
out of bullet-proof glass. If made out
of bullet-proof glass, the front wind-
shield can no longer be opened com-
pletely. Fig. 22 Opening the door
4.7.2 Sunblind
Above the upper front window, there is a pull-
down sunblind which can be engaged in three
different positions to reduce glare.
A second sunblind is below the skylight and
can be engaged in one position.
4.7.3 Cab door

From the interior, the cab door is released by
means of the lever (22/1).
Fig. 23 Door catch
When working or driving with the cab
door open, the cab door must be en-
gaged in the catch (23/2) by means
of the locking device (23/1).
The cab door is released from the catch by
means of the lever (24/1).
Fig. 24 Releasing the door from the catch
4.12 MHL 350

CONTROL 4
4.7.4 Door window

Adjust the sliding window in the door of the
driver's cab using the handle as required.
4.7.5 Skylight of drivers cab

To ventilate the cab, the skylight can be tilted
up.
4.7.6 Interior lighting of drivers cab

The interior lighting is switched on and off by
turning the lamp glass.
4.7.7 Windshield wash/wipe system

The container for the windshield washer fluid
is situated in the cab behind the driver's seat.
The container holds approx. 2 liters. We rec-
ommend that you always add window cleaner
with antifreeze to the water.
MHL 350 4.13

4 CONTROL
4.8 Cab with hydraulic elevation 4.8.3 Driving with elevated cab
The cab can be infinitely adjusted in vertical
direction. When driving with the cab elevated,
even small irregularities in the ground
4.8.1 Before putting into operation cause the cab to dip. This may result
in injuries of the driver (operator) or
The lifting equipment of the cab must be
to incorrect operation of the machine.
tested daily.
The machine may only be driven with
the cab elevated when the door is
The cab may only be repaired whilst closed, and not on public roads.
in elevated position when it is ade-
When driving with the cab raised, it
quately supported.
must be made sure that there are
A sleeve may be affixed to the piston rod of sufficient entrance heights to work
the lift frame cylinder to support the cab. This bays and other premises. In the
support sleeve can be obtained from FUCHS, event of a collision the operator is
under order number 6090031600. exposed to an increased risk of in-
jury.
4.8.2 During operation
The following points must also be observed:
Only enter or leave the cab when it is in the
lower end position. Do not remain on the There must be no obstacles in the vehicles
chassis or undercarriage or on the steps. Dur- path.
ing all movements of the cab, the machine The route must be such as not to endanger
operator must take care to ensure that s/he the stability of the machine and the safety of
and other persons are not in danger. the person in the cab.
The driver must have a sufficient overview
When driving with the cab raised, of the vehicles path, or the area must be
special care must be taken to ensure marked, e.g. by safety posts.
that no overhead power lines are
touched. If the machine has touched 4.8.4 Switching off the machine
an overhead power line, it shall only
be left or touched by persons stand- The cab must be returned to the rest position.
ing outside the cab when it is certain
that the machine is no longer in touch
with the power line or the current has
been switched off. See also chap-
ter 2.11.
4.14 MHL 350

CONTROL 4
4.8.5 Positioning the cab

The cab with hydraulic elevation can be infi-
nitely adjusted in horizontal position.
While the cab is being moved, and

during driving and working, the left-
hand armrest must be folded down
and the cab door shut.
Adjust the cab as follows:

Close the cab door and fold down the left-
hand armrest.
Press the push-button (25/34, arrow point-
ing upward) until the cab reaches the de-
sired height.
The cab is lowered by pressing the push-
button (25/34, arrow pointing downward).
4.8.6 Procedure for manual lowering of

elevated cab (in case of malfunction)
The cab can be lowered from the cab interior
using the ball valve (25/3) or from the super-
structure using the ball valve on the hydraulic
tank (26/1).
In order to raise the cab once more, after low-
ering, the ball valves (25/3) and (26/1) must
be returned to the shut-off position. Fig. 25 Positioning the cab
When lowering the elevating cab,

there is a danger to third parties of
being crushed by the lift frame, as
the machine operator cannot fully
see the area beneath it.
Fig. 26 Ball valve
MHL 350 4.15

4 CONTROL
4.9 Driving
The loading machine is not licensed

for use on the road, and therefore
shall not be driven on public high-
ways (in Germany).
4.9.1 Driving off
The direction of travel is always

based on the normal position of the
undercarriage (steering axle to the
front).
Start the engine as described on page 4.6.

st nd
Select 1 or 2 gear by pressing the toggle
switch (27/56) when the machine is stand-
ing still.
Release the parking brake (27/19) or ser-
vice brake (27/9) respectively.
The machine cannot be driven off if

the parking brake is applied. Indicator
(27/48) lights up red.
Drive forward by pressing pedal (27/10),

reverse by pressing pedal (27/11).
Driving speed is regulated by means of the
accelerator pedals (27/10) and (27/11).
Change from forward to reverse driv-

ing and vice versa only when the Fig. 27 Driving
machine is at a standstill. Do not
change direction while the machine is
still moving.
Do not change gears while the ma-

chine is in motion; otherwise danger
of damage affecting the transmission.
If the machine is stuck in difficult terrain, do
not attempt to free it by rocking. See chap-
ter 6, "Transport and Recovery" for how to
proceed.
The machine operator must be absolutely
certain that no one is in the vehicles path.
4.16 MHL 350

CONTROL 4
4.9.2 Coming to a halt

Driving speed is reduced by releasing the ac-
celerator pedals (28/10) and (28/11). The hy-
drostatic drive acts as a non-wearing service
brake. See also chapter 4.9.4, "Braking".
4.9.3 Steering
The steering of the front axle of the loading
machine is fully hydraulic.
In the event of steering malfunctions,

stop work immediately, determine the
cause (see trouble-shooting section)
and call for service personnel if nec-
essary. Fig. 28 Driving
4.9.4 Braking
Service brake (can be locked in place)
Apply the service brake (28/9) as required.
Parking brake/hand brake
Apply the parking/hand brake (28/19) when
stopping the machine.
Only apply the parking brake when

the machine is stationary.
When the parking brake is applied
the oscillating axle lock is activated at
the same time.
MHL 350 4.17

4 CONTROL
4.10 Parking the machine

Only park the machine in a safe place.
Lower the work equipment to the ground
and retract the cylinders as far as possible,
so that the piston rods are protected against
the weather.
Apply the parking brake (29/19).
Apply the slewing brake by pressing the
pedal (29/8).
Reduce the engine speed by moving the
engine speed control lever (29/18) forward,
and allow the engine to run at idle for a
short time in order to cool down.
Fig. 29 Parking the machine
Move the engine-speed control lever (29/18)
forward until the stop; switch off the engine.
Turn the ignition key to "0".
Turn the ignition key to I. Briefly actuate all
hydraulic levers in order to relieve the hy-
draulic system of pressure.
Turn the ignition key to 0 and withdraw it.
Fold up the left-hand armrest (29/6).
Lock the cab when work is over, so that it
cannot be entered by unauthorized persons.
Thoroughly clean the machine after each
major job.
4.18 MHL 350

TABLE OF CONTENTS
Page
5 WORK OPERATION
5.1 Loading operations ....................................................................................................... 5.1
5.1.1 Operation of work equipment ................................................................................. 5.1
5.1.2 Increasing the operating pressure.......................................................................... 5.1
5.1.3 Kick-down function................................................................................................. 5.2
5.1.4 Operation of outriggers .......................................................................................... 5.2
5.1.5 Disabling all work functions.................................................................................... 5.2
5.1.6 Operation of oscillating axle lock............................................................................ 5.3
5.1.7 Work zone extension ............................................................................................. 5.3
5.1.8 Overload warning device (optional) ........................................................................ 5.3
5.1.9 Overload cut-off (optional) ..................................................................................... 5.3
5.2 Changing and mounting work attachments................................................................... 5.4
5.2.1 Changing directly mounted work attachments........................................................ 5.4
5.2.1.1 Mounting ......................................................................................................... 5.4
5.2.1.2 Removal.......................................................................................................... 5.4
5.2.2 Changing work attachments with quick-attach system ........................................... 5.5
5.2.2.1 Mounting ......................................................................................................... 5.5
5.2.2.2 Removal.......................................................................................................... 5.5
5.2.3 Venting the hydraulics of the work attachment....................................................... 5.5
5.3 Slewing and loading operations .................................................................................... 5.6
5.4 Crane operations .......................................................................................................... 5.6
5.5 Magnet device (optional)............................................................................................... 5.7
5.5.1 Operation of magnet device................................................................................... 5.7
MHL 350
WORK OPERATION 5
5.1 Loading operations

The loading machine is equipped as standard with ISO control (fig. 30), upon which the following
description is based.
If the customer so wishes, the loading machine may be equipped with a non-standard
control. Your loading machine must therefore be checked to see whether or not a non-
standard control is installed. Incorrect operation may endanger persons or objects.
Before commencing work, memorize the lever controls well. Commence at low engine speed when
familiarizing yourself with the controls.
5.1.1 Operation of work equipment

Four-way control lever, left Four-way control lever, right
a = Extend dipperstick a = Lower box-type boom
b = Retract dipperstick b = Raise box-type boom
c = Slew uppercarriage anti-clockwise c = Close grab
d = Slew uppercarriage clockwise d = Open grab
Fig. 30 ISO control
5.1.2 Increasing the operating pressure

With the function increase operating pres-
sure, the hydraulic pressure can be in-
creased from 320 to 360 bar. This may be
necessary for heavy-duty work. To increase
pressure, press the push-button in the right-
hand four-way control lever (see fig. 31). The
function only takes effect whilst the push-
button is being pressed.
The pressure increase affects the boom only.
There is no pressure increase for the func-
tions "travel" and "open/close grab". Fig. 31 Increasing the operating pressure
MHL 350 5.1

5 WORK OPERATION
5.1.3 Kick-down function

see chapter 4.4.4.3
5.1.4 Operation of outriggers

Lever (32/1) forward : Outriggers down
Lever (32/1) backward : Outriggers up
5.1.5 Disabling all work functions

All work functions can be disabled using the
toggle switch (33/36). The indicator lamp in
the switch does not light up; the indicator
lamp (33/50) lights up.
All work functions are disabled when the
armrest (33/6) is folded up. The indicator
Fig. 32 Outriggers
All work functions are disabled when the
service ladder is folded down. The indicator
If the permitted coolant temperature is ex-
ceeded, all travel and work functions are
disabled. The indicator lamp (33/43) lights
up (see also chapter 4.4.2).
Fig. 33 Disabling work functions
5.2 MHL 350

WORK OPERATION 5
5.1.6 Operation of oscillating axle lock

The overload warning device is a
The oscillating axle lock is activated by the
safety device and shall not be used
parking brake (34/19), i.e. the oscillating axle
as part of normal operation. The
is locked automatically when the brake is ap-
values in the table of carrying ca-
plied. The oscillating axle may also be locked
pacity must be strictly observed. We
independently from the parking brake by
recommend that you work only with
means of the toggle switch (34/55). The indi-
the overload warning device
cator lamp in the switch does not light up.
switched on.
For slewing and loading operations, lock the
oscillating axle. The indicator lamp in the The overload warning device is switched on
switch (34/55) does not light up. using the toggle switch (34/26). The indicator
lamp in the toggle switch lights up red.
For driving (without load), unlock the oscil-
lating axle. The indicator lamp in the switch 5.1.9 Overload cut-off (optional)
(34/55) lights up.
The machine can be equipped with an over-
5.1.7 Work zone extension load cut-off. This cuts off the work equipment
when the permissible load limit is reached. It
The work zone extension function is activated only remains possible to retract the stick in
by means of the toggle switch (34/35), i.e. the order to reduce the load moment.
dipperstick may be moved inside the safety
zone between the cab and the work attach-
ment mounting. The overload cut-off requires the
machine to be supported by outrig-
Work zone extension active: The lamp in the gers.
toggle switch (34/35) lights up.
When the work zone extension is

active, the work attachment may
knock into the cab.
If the dipperstick reaches the limit of the
safety distance, the indicator lamp (34/52)
lights up red.
5.1.8 Overload warning device (optional)

The machine can be equipped with an over-
load warning device. This emits an acoustic
signal (discontinuous buzzing tone) when the
permissible load limit is reached. If this signal
sounds, work movements increasing the load
moment are prohibited.
The overload warning device re-

quires the machine to be supported
by outriggers.
Fig. 34 Oscillating axle lock
MHL 350 5.3

5 WORK OPERATION
5.2.1.1 Mounting
The overload cut-off is a safety de-
vice and shall not be used as part of Work attachments are mounted as follows:
normal operation. The values in the Remove the cotter pin (35/1).
table of carrying capacity must be
strictly observed. We recommend Unscrew the castle nut (35/2).
that you work only with the overload Remove the pin (35/3) from the holding fix-
cut-off switched on. ture.
Please follow the instructions of Messrs. Move the dipperstick onto the holding fixture
Krger for how to operate the overload cut-off. (35/4) so that the pin is pushed into the fix-
ture and into the bearing on the dipperstick.
5.2 Changing and mounting work attach-
Screw on the castle nut.
ments
Secure the castle nut with the cotter pin.
The loading machine can be equipped with
various work attachments, e.g. grab, magnet, Connect the hydraulic lines and electric ca-
lift hook. bles (magnet) of the work attachment to the
This section describes the mounting and re- connections on the dipperstick. Ensure that
moval of both directly mounted work attach- lines and cables are not crossed.
ments and those with quick-attach system.
The bearings on the dipperstick and
work attachment must be clean.
Special care must be taken to ensure
that removed work attachments are 5.2.1.2 Removal
placed on the ground in such a way
that they cannot overturn or move. For removal, proceed in the reverse order to
We recommend opening cactus mounting, described in chapter 5.2.1.1.
grabs before placing them on the
ground. Clamshell grabs, in particu-
lar, must be secured against over-
turning.
Before hydraulic connections can be
detached, the hydraulic system must
be relieved of pressure. To do so,
see chapter 7.1.1 "Letting off residual
pressure in the hydraulic circuit".
5.2.1 Changing directly mounted work

attachments
The work attachment must be

mounted in such a way that the
hydraulic connections of the at-
tachment are on the same side as
the hydraulic connections of the
dipperstick.
Fig. 35 Direct mounting
5.4 MHL 350

WORK OPERATION 5
5.2.2 Changing work attachments with 5.2.3 Venting the hydraulics of the work
quick-attach system attachment
When changing work attachments with quick- When defective hydraulic hoses or cylinders
attach system, the pin remains in the bearing are replaced, air may collect in the hydraulic
of the dipperstick. The work attachments are system. In order to prevent damage to the
fastened to the pin by means of a clamping piston seals of the hydraulic cylinders, the
device. system must be vented before use.
The work attachment must be To this purpose, slightly loosen the swivel
mounted in such a way that the hy- nuts on the adjustable angles of the two
draulic connections of the work at- supply hoses on the work attachment
tachment are on the same side as (grab). Hold against the screw couplings us-
those of the dipperstick. ing a wrench!
Perform several work maneuvers
5.2.2.1 Mounting (open/close grab).
Attachments are mounted as follows: When oil escapes without bubbles, tighten
the swivel nuts at the adjustable angles
Remove the locking clip (36/4). parts by 1/3 turn above the point of percep-
Slacken the nuts of both turnscrews (36/1) tible increase in force. To do so, hold
(do not unscrew completely). against the screw couplings using a wrench!
Open the quick-attach system on the work
attachment.
Open the turnscrews (36/1).
Open the clamps (36/2).
Move the dipperstick onto the work attach-
ment until the pin (36/3) is in the bearing of
the quick-mount hitch.
Re-close the clamps (36/2).
Re-tighten the nuts of the two turnscrews.
Secure the nut with the locking clip (36/4).
Connect the hydraulic lines and electric ca-
bles (magnet) of the work attachment to the
connections on the dipperstick. Ensure that
lines and cables are not crossed.
5.2.2.2 Removal
For removal, proceed in the reverse order to
mounting, described in chapter 5.2.2.1. Fig. 36 Quick-attach system
MHL 350 5.5

5 WORK OPERATION
5.3 Slewing and loading operations Do not slew the uppercarriage so fast that
the load is pulled strongly outward through
Observation of the following points is essen-
centrifugal force or the load swings when
tial:
braking.
Machine with outriggers up
Do not brake the slewing motion of the
When the outriggers are up, loads may uppercarriage by dropping the work
only be hoisted above the front or rear axle equipment.
respectively, see table of carrying capacity.
When slewing, ensure sufficient all-round
When the outriggers are up, perform work carrying capacity.
operations only with the oscillating axle be-
No one shall remain in the danger zone of
ing locked, see chapter 5.1.6.
the machine during operation.
When the machine is standing still, the
Never force the controls.
parking brake must be applied. When the
parking brake is applied, the oscillating
5.4 Crane operations
axle is locked.
see chapter 2.14
Machine with outriggers down
When the outriggers are down, the wheels
must be blocked with the service brake.
The 4-point outriggers must rest firmly
upon the ground during work operations.
This must also be monitored continuously
during work, and the support cylinders re-
adjusted if necessary.
General notes
The values in the table of carrying ca-
pacity must be strictly observed.
Released whilst the uppercarriage is slew-
ing, the left-hand four-way control lever
(35/4) automatically goes to neutral posi-
tion, and the uppercarriage is sensitively
braked. The uppercarriage may also be
braked by countering, i.e. steering in the
opposite direction of slewing.
Fig. 37 Slewing the uppercarriage
The uppercarriage can be kept in a certain
position by pressing the pedal (37/8). The
slewing brake (37/8) shall not be used to
brake the uppercarriage.
Do not level the ground in front of the load-
ing machine with the work equipment by
slewing the uppercarriage to and fro.
Neither knock nor beat the grab.
Pay attention to hoses when lowering the
grab into a shaft.
Do not pull loads with the swing assembly.
5.6 MHL 350

WORK OPERATION 5
5.5 Magnet device (optional)

5.5.1 Operation of magnet device
Switch on the magnet device using the tog-
gle switch (38/60). The indicator lamp in the
switch (38/60) lights up.
Move the magnetic plate onto the material
to be picked up.
Activate the magnet using the button (38/5)
on the left-hand four-way control lever. The
In order to achieve optimum performance
when picking up material with the magnetic
plate, only magnetize the plate immediately
before positioning the magnet on the mate-
rial to be picked up. Do so using the button
(38/5) on the left-hand four-way control
lever. Lift the magnetic plate up out of the
material after max. 5 seconds.
Withdraw the magnetic plate with attached
material.
To drop the material, deactivate the magnet
by means of the button (38/5). The lamp
(38/59) goes out.
If the material drops too slowly, the potentio-
meter (38/30) must be turned clockwise. If the
material is attracted back to the magnet whilst
being dropped, the potentiometer must be
turned anti-clockwise. The voltage gauge Fig. 38 Operation of magnet device
(38/29) indicates the momentary voltage. The
operating voltage shall not exceed 220
230 V.
To avoid excessive generator overload, the
respective max. permissible output of the
magnet plates installed on our loading ma-
chines is not to be exceeded in accordance
with below-mentioned table and the generator
system installed.
Output of the gen- Max. permissible

erator system in- output of magnet
stalled plate
13 kW 9 kW *
20 kW 14 kW *
* It is always possible to install smaller mag-

net plates.
MHL 350 5.7

5.8 MHL 350

TABLE OF CONTENTS
Page
6 TRANSPORT AND RECOVERY
6.1 Towing the machine...................................................................................................... 6.1
6.2 Recovery of the machine .............................................................................................. 6.2
6.3 Loading onto a flat-bed trailer or train ........................................................................... 6.2
6.4 Fixing points for lifting the machine with a crane........................................................... 6.3
MHL 350
TRANSPORT AND RECOVERY 6
6.1 Towing the machine
The machine is equipped with two towing
lugs, one on the front and one on the rear of
the undercarriage.
Symbol:
The towing lugs have a maximum

bearing pressure of 120 kN.
Before the machine can be towed, the power
shift transmission must be set to neutral posi-
tion (idle running). The way to proceed de-
pends on the diesel engine (if it is running
during towing or not).
When the diesel engine is switched

off it must be observed that the ma-
chine can neither be steered nor
braked.
Diesel engine is standing still
Switch on the ignition.
Switch the transmission through using the
push-button (39/56) for approx. 10x. The
transmission control is now pressureless;
the transmission is in neutral position.
Diesel engine is running during towing
Switch off the diesel engine; switch on the
ignition.
Switch through the transmission (39/56) for
Fig. 39 Transmission control
approx. 10x. The transmission control is
now pressureless; the transmission is in
neutral position.
Switch off the ignition.
Unscrew the hoses (40/1) and (40/2) on the
transmission.
Tightly seal the hoses and connections on
the transmission; fasten the loosened hoses
on the undercarriage.
Start the engine.
The transmission is pressureless and remains
in neutral position with the engine running.
After towing, the hoses must be re-attached to
the transmission.
Fig. 40 Transmission control
MHL 350 6.1

6 TRANSPORT AND RECOVERY
6.2 Recovery of the machine
If the machine is stuck fast in difficult terrain, do not attempt to free it by rocking.
The machine can be pulled free with the aid of the work equipment. Here, it must be in 1st gear
(13/56). In certain conditions, the work attachment must be removed.
If the machine cannot be freed using the work equipment, it must be towed clear following the in-
structions in chapter 6.1.
6.3 Loading onto a flat-bed trailer or train

For transport on a flat-bed trailer or train wagon, the machine must be lashed in place so that it
cannot move. The machine is equipped with two lashing points for this purpose (see fig. 41).
Fig. 41 Loading onto a flat-bed trailer or train
To ensure safe transport, the machine must

be prepared as follows:
Bring the uppercarriage into the direction of
travel and lock the slewing brake (42/8).
Lay the work equipment on the loading
area, do not lift the machine.
Place wooden chocks under the four twin
tires to keep the machine in place.
Attach ropes or chains to the lashing points
and secure the machine on the loading area
(see fig. 41).
Fig. 42 Transport of the machine
6.2 MHL 350

TRANSPORT AND RECOVERY 6
6.4 Fixing points for lifting the machine If required, the fixing device may be obtained
with a crane from FUCHS.
For loading onto flat-bed trailers, etc., the en- Shackle size 20 to DIN 82101 is recom-
tire machine may be lifted. mended, in accordance with the weight of the
machine.
Pivot-mounted work attachments
Bring the work equipment to the transport
such as a grab or magnet must be
position, as for loading onto a flat-bed trailer
removed before the machine is
(see fig. 41).
lifted. Swinging movements of the
work attachment would otherwise In this position, the load, based on the fixing
make safe lifting impossible. points, is distributed fairly evenly.
Dismantle the supporting feet from the outrig- The minimum lifting capacity per rope must be
gers. 100 kN (10 t).
Fasten the hoisting device (43/1) with the pins The four fixing ropes shall not be shorter than
(43/2) and fastening elements (43/3). Move 13 m for reasons of weight distribution, other-
the supports (43/4) to horizontal position. wise a lifting harness must be used.
The pins and fastening elements match the The ropes must be routed so that no damage
attachment of the supporting feet. occurs to the cab or paneling.
Fig. 43 Attaching the machine
MHL 350 6.3

6.4 MHL 350

TABLE OF CONTENTS
Page
7 CARE AND MAINTENANCE
7.1 General information ...................................................................................................... 7.1
7.1.1 Regular oil analyses............................................................................................... 7.2
7.1.2 Letting off residual pressure in the hydraulic circuit................................................ 7.3
7.2 Service parts................................................................................................................. 7.3
7.3 Work before putting into operation................................................................................ 7.4
7.3.1 Checking the engine oil level ................................................................................. 7.4
7.3.2 Fuel system ........................................................................................................... 7.4
7.3.2.1 Fuel level......................................................................................................... 7.4
7.3.2.2 Water separator .............................................................................................. 7.4
7.3.3 Cooling system ...................................................................................................... 7.5
7.3.3.1 Coolant level ................................................................................................... 7.5
7.3.3.2 Checking the antifreeze .................................................................................. 7.5
7.3.4 Checking the hydraulic oil level .............................................................................. 7.5
7.3.5 Cleaning the radiator.............................................................................................. 7.5
7.3.6 Tires....................................................................................................................... 7.6
7.3.7 Checking the oil levels in axles, swing transmission and power shift transmission. 7.6
7.3.8 Electrical equipment............................................................................................... 7.6
7.3.9 Transmission oil levels in grab and magnet ........................................................... 7.7
7.3.10 Fastening bolts of grab and magnet....................................................................... 7.7
7.4 Overview of lubricating points ....................................................................................... 7.8
7.4.1 Central lubricating system...................................................................................... 7.11
7.4.1.1 Automatic check.............................................................................................. 7.11
7.4.1.2 Filling the grease container ............................................................................. 7.12
7.4.1.3 Lubrication when lubricating pump is defective ............................................... 7.12
7.4.1.4 Triggering additional lubrication ...................................................................... 7.12
7.5 Inspection plan ............................................................................................................. 7.13
7.6 Inspection and maintenance work................................................................................. 7.16
7.6.1 Diesel engine ......................................................................................................... 7.16
7.6.2 Changing the engine oil ......................................................................................... 7.16
7.6.3 Engine oil filter ....................................................................................................... 7.16
7.6.4 Fuel system ........................................................................................................... 7.17
7.6.4.1 Fuel filter ......................................................................................................... 7.17
7.6.4.2 Cleaning/replacing the fuel pre-filter................................................................ 7.17
7.6.4.3 Draining water from the fuel system................................................................ 7.18
7.6.4.4 Venting the fuel system................................................................................... 7.18
7.6.5 Air filter, air filter pipe ............................................................................................. 7.19
7.6.5.1 Air filter pipe .................................................................................................... 7.19
7.6.5.2 Removal of the main cartridge ........................................................................ 7.19
7.6.5.3 Cleaning the main cartridge ............................................................................ 7.20
7.6.5.4 Removing the safety cartridge......................................................................... 7.20
7.6.6 Cooling system ...................................................................................................... 7.21
7.6.6.1 Cleaning the radiator....................................................................................... 7.21
7.6.6.2 Changing the coolant (engine radiator) ........................................................... 7.21
7.6.7 Checking V-belts.................................................................................................... 7.22
7.6.7.1 Tensioning V-belts (generator)........................................................................ 7.22
7.6.7.2 Replacing V-belts (generator) ......................................................................... 7.22
7.6.7.3 Tensioning V-belts (water/fuel pump).............................................................. 7.22
7.6.7.4 Replacing V-belts (water/fuel pump) ............................................................... 7.22
MHL 350
TABLE OF CONTENTS
Page
7.6.8 Checking and adjusting the valve lash ................................................................... 7.23
7.6.9 Battery ................................................................................................................... 7.23
7.6.10 Bleeding the brake................................................................................................. 7.24
7.6.11 Bleeding the parking brake .................................................................................... 7.24
7.6.12 Adjusting the play of the parking brake .................................................................. 7.24
7.6.13 Venting the oscillating axle cylinders...................................................................... 7.25
7.6.14 Hydraulic oil ........................................................................................................... 7.26
7.6.15 Hydraulic oil return filters ....................................................................................... 7.27
7.6.16 Hydraulic oil tank ventilation filter ........................................................................... 7.28
7.6.17 Blocking off the hydraulic oil on the tank ................................................................ 7.28
7.6.18 Changing axle oil and transmission oil ................................................................... 7.29
7.6.18.1 Front axle differential....................................................................................... 7.29
7.6.18.2 Rear axle differential ....................................................................................... 7.29
7.6.18.3 Wheel hubs..................................................................................................... 7.30
7.6.18.4 Power shift transmission ................................................................................. 7.30
7.6.19 Swing transmission ................................................................................................ 7.30
7.6.20 Tightening torques ................................................................................................. 7.31
7.6.21 Changing transmission oil grab and magnet ....................................................... 7.32
7.7 Care and cleaning......................................................................................................... 7.33
7.8 Preservation (temporary shutdown) .............................................................................. 7.33
7.8.1 During shutdown .................................................................................................... 7.34
7.8.2 After shutdown....................................................................................................... 7.34
MHL 350
CARE AND MAINTENANCE 7
7.1 General information

The battery disconnect switch is
The good operating condition and life expec- located in front of the oil radiator.
tancy of the machine are largely influenced by Before working on the electrical
care and maintenance. system, the electric circuit must be
interrupted by means of the battery
For this reason, it is in every machine owners
disconnect switch. Before welding,
interest to comply with these maintenance
the electric circuit must be inter-
instructions. This instruction book contains
rupted by disconnecting the battery
detailed information on daily and weekly main-
ground cable. The running machine
tenance, inspection and lubrication tasks in
shall not be switched off using the
chapter 9.
battery disconnect switch, as this
During the warranty period three inspections causes damage to the electrics.
are stipulated, which must be carried out by
trained specialist personnel. When changing fuels, lubricants
Inspection intervals and coolants, such as engine oil,
lubricating oil, hydraulic oil, fuel,
Inspection intervals in operating hours etc., care must be taken to ensure
st that these fluids do not seep into
1 inspection after approx. 100 operating the ground. Suitable containers
hours
must be used to collect them. If they
nd
2 inspection after approx. 500 operating do run into the soil nevertheless,
hours their escape must be stopped im-
rd
3 inspection after approx. 1,000 operating mediately and the fluid bound with
hours suitable binding agents. If neces-
sary, this area of soil must be exca-
Subsequently, every 500 operating hours
vated. Binding agents and exca-
vated soil must be disposed of in
The three inspections at 100, 500 the proper manner. The relevant
and 1,000 operating hours are environmental regulations must be
obligatory and must be paid for. complied with.
The performance of the inspections
Repair work may only be performed
as specified shall be confirmed on
on the elevated cab when it is se-
the inspection cards in the warranty
curely supported (see chapter 4.8).
and handing-over certificate.
If this is omitted, the warranty may
When performing maintenance and
be subject to restrictions.
repair work, the necessary safety
precautions according to chap-
ter 2.15 ff must be observed.
MHL 350 7.1

7.1.1 Regular oil analyses

Oil analyses are not to question the oil change
intervals specified but take into account a po-
tential reduction of maintenance costs, the
early recognition of imminent damage as well
as increased environmental consciousness.
Advantages of an oil analysis
Extension of oil change intervals in the case
of normal or light-duty operating conditions.
Minimum wear of high-quality components
because of optimum utilization of fuels, lu-
bricants and coolants.
Periodic lab analyses allow early recognition
of imminent damage.
Early service/repair work protects equip-
ment from serious and unforeseeable dam-
age.
Consequential damage is avoided.
At what intervals should the oil be ana-
lyzed?
Regular oil analyses show the development of
the oil condition and the condition of the ma-
chine.
Upon reaching the scheduled oil sampling
point, oils should be checked at the following
intervals in order to check the quality of the oil
and thus extend oil change intervals:
hydraulic oil: 1,000 operating hours
transmission oil: 500 operating hours
engine oil: 100 operating hours
Oil sample intervals according to the first re-
sults and as specified by test lab.
A detailed leaflet specifying oil test proce-
dures, etc. can be obtained from your FUCHS
dealer.
7.2 MHL 350

7.1.2 Letting off residual pressure in the Service parts for inspections must be
hydraulic circuit stocked in good time!
When performing maintenance and

repair work on the hydraulic system,
the residual pressure in the hydrau-
lic circuit must be let off. Before
performing this work, the work
equipment must be safely lowered
onto the ground.
To let off pressure, the following operator con-
trols must be actuated for at least 5 operating
cycles with the diesel engine switched off. The
ignition must be switched on (ignition key
set to I).
Observe the given sequence for

points 2 & 3!
1. Four-way control levers (44/4) and
(44/16), lower work equipment, slew up-
percarriage, open/close grab
2. Service brake pedal (44/9) (actuate
20 times)
3. Parking brake (44/19)
4. Accelerator pedals (44/10), (44/11)
5. Slewing brake pedal (44/8)
6. Push-button (44/34) for elevating cab
7. Lever for outriggers (44/1)
8. Push-button (44/17) for grab rotation
Fig. 44 Letting off residual pressure
9. Push-button (44/55) for oscillating axle
10. Toggle switch for transmission control Fuels, lubricants and coolants
(44/56)
The machines life expectancy and operating
7.2 Service parts condition are largely dependent upon the use
of the specified fuels, lubricants and coolants
Service parts Spare part number and compliance with the service intervals.
Return filter element 2x 5 003 660 422 If fuels, lubricants and coolants which do not
Insert of ventilation filter 5 003 730 010 conform to our recommendations are used,
consequential damage may occur for which
Engine oil filter 5 411 656 298
we will not assume liability, even inside the
Fuel filter 5 411 656 493 warranty period.
Fuel pre-filter cartridge 5 411 656 722
Engine air filter: FILLING QUANTITIES see chapter 3.17
Main cartridge 5 501 656 762 FUELS, LUBRICANTS
Safety cartridge 5 411 656 759 AND COOLANTS see chapter 3.18
V-belts: 5 411 656 715
Water and fuel pump drive 5 411 656 691
Generator drive
Generator V-belt 2x 1 490 953 789
MHL 350 7.3

7.3 Work before putting into operation

7.3.1 Checking the engine oil level
The oil level must be checked daily before
start-up, with the machine standing on level
ground.
The notches on the oil dipstick indicate the
minimum and maximum oil levels.
Top up the existing level of engine oil if
necessary. Unscrew the cap and add the
same oil from a clean container.
Fig. 45 Fuel level
7.3.2 Fuel system
7.3.2.1 Fuel level
Check the fuel level on the fuel gauge (45/39).
In order to prevent condensation forming be-
fore the next time the machine is used, fill the
tank with fuel after daily use. To do so, open
tank cap (46/1).
Never allow the fuel tank to run

empty, as otherwise the fuel system
has to be vented.
7.3.2.2 Water separator

Open the drain plug on the water separator
(47/1) once a week and observe the escaping
liquid. As soon as fuel instead of water es- Fig. 46 Tank cap
capes tighten drain plug.
Fig. 47 Water separator
7.4 MHL 350

7.3.3 Cooling system

7.3.3.1 Coolant level
Only check the coolant level when

the engine is cold. Hot coolant may
scald!
Engine coolant radiator
If the coolant level is too low, the lamp (45/38)
lights up.
Remove the protective cover.
Remove the cap (48/1) and check the cool-
ant level.
The coolant must be up to the overflow
pipe.
Fig. 48 Engine radiator
7.3.3.2 Checking the antifreeze
Check the level of antifreeze protection before
the beginning of the cold season.
Always use an antifreeze with anti-

corrosion protection. The antifreeze
level is set to approx. -35 C at the
factory. When topping up, only a
mixture of 50 % water and 50 %
antifreeze should be used. Anti-
freeze in higher concentrations than
50 % must be avoided, as this im-
pairs the effectiveness of the cool-
ing system.
7.3.4 Checking the hydraulic oil level Fig. 49 Hydraulic oil sight glass
Check the oil level using the sight glass
(49/2), and top up if necessary.
To check the oil the work equipment

must be extended and lowered to
the ground, and the outriggers
moved to their uppermost position.
The hydraulic oil level must lie between the
two markings on the sight glass (49/2).
7.3.5 Cleaning the radiator

The cooling fins of the engine coolant radiator
(50/2) and the hydraulic oil radiator (50/1)
must be cleaned from dirt taken in.
Fig. 50 Cleaning the radiator
MHL 350 7.5

7.3.6 Tires
Tightness of wheel nuts
During the first 50 operating hours, check the
torque of the wheel nuts daily, and subse-
quently at regular intervals, and tighten to the
correct torque if necessary.
Tightening torque: 450 Nm
When changing a wheel, always tighten the Fig. 51 Rear axle
nuts to the specified torque crosswise in sev-
eral steps.
7.3.7 Checking the oil levels in axles,

swing transmission and power shift
transmission
Park the machine on level ground.
Turn the wheel until the drain plug (53/2) is
at the bottom.
Remove the checking plugs from the: Fig. 52 Front axle
Rear axle (51/1)
Front axle (52/1)
Wheel hub (53/1)
Power shift transmission (55/1),
check the oil level and top up if necessary. 1
7.3.8 Electrical equipment

2
The lighting and warning equipment, including 380-027-008
the function of the indicator lamps, must be

Fig. 53 Wheel hub
checked prior to use.
Fig. 54 Swing transmission
Fig. 55 Power shift transmission
7.6 MHL 350

7.3.9 Transmission oil levels in grab and

magnet
For checking see inspection plan, chapter 7.5
and oil analyses, chapter 7.1.1.
Position the clamshell grab, cactus grab or
magnet vertically on a level surface.
Remove the screw plugs (56/1), (57/1).
The oil level must be up to the hole.
Top up oil if necessary.
7.3.10 Fastening bolts of grab and magnet

For checking see inspection plan, chapter 7.5
as well as fuels, lubricants and coolants,
chapter 3.18.
Tighten the fastening bolts (56/2) of the Fig. 56 Grab
clamshell grab and cactus grab to a torque
of 210 Nm.
Tighten the fastening bolts (57/2) of the
magnet to a torque of 290 Nm.
When a magnet is fitted, the damping dis-
tance must be checked. To do so, the magnet
is placed on an even surface and pressed
down using the work equipment of the ma-
chine. The damping distance must be ap-
proximately the same all round. If this is not
the case, and the difference is greater than
3 mm (see fig. 57), the annular spring set
must be replaced. Fill the space for the annu-
lar springs with grease, then install the
springs. Take care that the rings are not
crooked and lie snugly against one another.
Fig. 57 Magnet
MHL 350 7.7

7.4 Overview of lubricating points
Fig. 58 Overview of lubricating points
7.8 MHL 350

Overview of lubricating points
No. Lubricating points Qty. Remarks
1 Bearing of outrigger foot 4 X

2 Bearing of outrigger claw 4 X manual lubrication
3 Bearing of outrigger cylinder 8 X
4 Propeller shafts (if not maintenance- 6 X see fig. 61
free)
5 Cab door 2 X
6* Bearing of elevating cab 10 X
7 Bearing of box-type boom 2 X central
8 Boom cylinder bearing 4 X lubrication
9 Dipperstick bearing 2 X uppercarriage
10 Dipperstick cylinder bearing 4 X
11 Rotary transmission 8 X
12 Bearing of work attachment mounting 2 X
13 Rocking shaft bearing (cactus grab) 1 X
14 Cylinder bearing (cactus grab) 10 X
15 Bearing of grab arms (cactus grab) 5 X manual
16 Engine hood hinge 2 X
17 Service ladder hinge 2 X
18 Hinge of engine radiator cover 2 X
19 Hinge of hydraulic oil radiator cover 2 X lubrication
20 Speed control cylinder 2 X
21 Steering gear case 4 X see fig. 60
22 Steering cylinder bearing 4 X see fig. 59
23 Oscillating axle bearing 2 X see fig. 62
24 Grease nipple on rod eye 1 X perform additional lubrication
(manual lubrication) with load-
ing equipment lowered to the
ground (system without pres-
sure)
* The points marked must be subjected to a visual and functional inspection every
500 operating hours (see chapter 7.5). In particular, general damage and wear must
be observed.
MHL 350 7.9

Overview of lubricating points
Fig. 59 Steering cylinder Fig. 61 Propeller shaft
Steering cylinder: 4 lubricating points Propeller shaft: 6 lubricating points
Fig. 60 Steering gear case Fig. 62 Oscillating axle
Steering gear case: 4 lubricating points Oscillating axle: 2 lubricating points
7.10 MHL 350

7.4.1 Central lubricating system

The machine is equipped with a central lubri-
cating system which automatically supplies
certain bearing points on the uppercarriage
with grease (as shown in Overview of lubri-
cating points).
7.4.1.1 Automatic check

Each time that the ignition (63/25) is switched
on, a function check of the central lubricating
system drive motor and indicator lamp (63/58)
takes place. The indicator lamp (63/58) in the
button lights up for 2 seconds. If no malfunc-
tion is present, the indicator lamp goes out.
If the indicator lamp flashes, there is a mal-
function in the drive motor of the lubricating
system.
If the indicator lamp does not light up at all, it
is defective.
If the indicator lamp flashes during operation, Fig. 63 Button for lubrication
please read the meaning of the flash code
signals in the central lubricating system in-
struction booklet.
MHL 350 7.11

7.4.1.2 Filling the grease container

Fill the grease container using the filler pump
which is in the tool kit.
To do so, insert an appropriate re-fill car-
tridge into the filler pump.
Remove the protective plug (64/1).
Screw the filler pump onto the gland with
threat.
Operate the filler pump (container has a
capacity of approx. 3 kg. low-viscosity
grease).
It is also possible to fill the container via the
filler nipple (64/2) up to the Max mark. Fig. 64 Grease container
For the grease to be used, see fuels, lubri-
cants and coolants, chapter 3.18.
Grease must be free from impurities

and its viscosity shall not change
over time. Grease additives, such
as molybdenum disulfide, shall not
be added.
Run the pump whilst filling. The
lines are vented automatically up to
the lubricating point.
After filling, additional lubrication can be trig-
gered if necessary (see chapter 7.4.1.4), in
order to ensure that lines are fully vented.
7.4.1.3 Lubrication when lubricating pump

is defective
If the lubricating pump is defective, the bear-
ing points may be greased manually via the
lubricating nipple (64/3) on the pump.
7.4.1.4 Triggering additional lubrication

The operator may trigger additional lubrication
at any time.
Additional lubrication is triggered as follows:
Press the button (63/58) and hold for
approx. 3 seconds. The indicator lamp lights
up while lubrication takes place.
7.12 MHL 350

7.5 Inspection plan

Work to be performed by trained dealer or service personnel.
O = Checking, maintenance Operating hours

X = Replacement
Perform work with machine at operating temperature!
1 Check whether machine-specific instruction book is in the machine O O O O

2 Engine oil X X X
3 Engine oil filter X X X
4 Drain water from fuel tank O O O O
5 Replace back leak fuel pipes O O X X
6 Fuel filter X X X
7 Fuel pre-filter X X X
8 Air intake O O O O
9 Air filter according to
service X
indicator
10 Clean cooling fins of engine and hydraulic oil radiator
The cleaning intervals should be shortened if there is high ex- O O O O
posure to dust.
11 Coolant antifreeze (AVIA, BASF, SHELL) O
1)
12 Change coolant as required
13 V-belt tension O O O O
14 Engine mounts, pump attachments O O O O
15 Engine speed control/CEB-control O O O O
16 Function of electro-hydraulic gas adjustment O O O O
17 Exhaust system O O O O
18 Engine valve lash O O O
19 Wheel nuts O O O O
20 Secure fastening of axles and propeller shafts O O O O
21 Tighten the fastening bolts on the counterweight (1,000 Nm) O O O O
22 Bearing of height-adjustable cab (see chapter 7.4) O O
23 Perfect function of door catches O O O O
24 Function of brakes O O O O
1) at least every 2 years
MHL 350 7.13

X = Replacement
25 Brake pads (service brake and parking brake) O O

26 Bleed service brake and parking brake (if required) O O O O
27 Adjust play of parking brake (if required) O O O O
28 Bearing bushings and bolts of work equipment O O O O
29 Electrical indicating and warning elements and lighting system O O O O
30 Ease of movement of operator controls O O O O
31 Check hydraulic axle lock and vent oscillating axle cylinders O O O O
32 Steering function O O O O
33 Condition and function of outriggers O O O O
34 Check tightness of all lines, hoses, control valves, hydr. pumps,

cylinders, etc.
When tightening hose and line connections, the screw cou- O O O O
plings must be locked to prevent rotation.
35 Pump drive O O O O
36 Secure fastening of slewing ring attachment, swing transmission,
swing transmission motor O O O O
37 Grease machine according to overview of lubricating points see chapter 7.4

38 Check function, condition and completeness of safety equipment O O O O
39 Hydraulic function check with pressure function test O O O O
40 Fastening bolts of grab and magnet O O O O
2)
41 Oil-immersed air filter (heater, optional): oil change X O O X
42 Air filter (hot water heating) X O O X
43 V-belt tension, generator O O O O
44 Check V-belt tension and condition of air conditioning system (op-
tional) X X X X
45 Test run and test work O O O O

46 Power shift transmission: oil check or oil change X O X X
47 Swing transmission: oil check or oil change X O X X
48 Hydraulic oil tank ventilation filter X X X
49 Initial inspection cards and return to FUCHS O O O
2) The cleaning intervals should be shortened if there is high exposure to dust.
7.14 MHL 350


X = Replacement
50 Differential of front and rear axles, oil check or oil change X O X X

51 Wheel hubs of front and rear axles, oil check or oil change X O X X

X = Replacement
52 Hydraulic oil return filter insert X X

53 Check hydraulic oil, or oil change 3) O O X X
3) Extension of hydraulic oil change interval -
Hydraulic oil change according to oil sample analysis and lab. report. Oil sample interval as specified by test lab.
MHL 350 7.15

7.6 Inspection and maintenance work 7.6.3 Engine oil filter

7.6.1 Diesel engine The engine oil filter must be replaced every
time the engine oil is changed.
All inspection and maintenance work not con-
tained here should be performed as described Clean the outside of the engine oil filter car-
in the separately supplied diesel engine in- tridge (66/1).
struction book.
Unscrew the engine oil filter cartridge (66/1)
7.6.2 Changing the engine oil and dispose of in the proper manner.
For engine oil change filling quantity and lu- Clean the sealing area of the filter carrier.
bricating oil specifications, see chapters 3.17 Wet the sealing ring of the new filter with oil.
3.18.
Screw in the engine oil filter cartridge by
Change acc. to inspection plan, chapter 7.5 hand until the gasket of the engine oil filter
and oil analyses chapter 7.1.1. cartridge touches the filter head.
Collect the oil, do not allow it to Turn the engine oil filter cartridge manually
seep into the ground. Dispose of in with one more half turn.
the proper manner! Only start the engine if there is sufficient
Oil change oil in the engine (see chapter 7.6.2).
Bring the engine to operating temperature, Check the tightness of the engine oil filter
lubricating oil temperature approx. 80 C. cartridge.

Stop the engine.
Place suitable oil drip pan below the outlet.
Unscrew the protective cap from the valve
(65/1).
Screw the oil drain hose (65/2) onto the oil
change valve (65/1) and drain the oil.
Danger of scalding when hot oil is

drained!
Remove the oil drain hose (65/2) and screw

the protective cap onto the valve (65/1). Fig. 65 Oil change valve
Replace the engine oil filter (see 7.6.3).

Remove the cap (66/2).
Fill with lubricating oil up to the Max. mark
on the oil dipstick.
Close the cap (66/2).
Start the engine and run at bottom-end idle
for approx. 2 minutes.
Switch off the engine.
Check the oil level after approx. 15 minutes
and top up oil if necessary.
Fig. 66 Engine oil filter cartridge
7.16 MHL 350

7.6.4 Fuel system

7.6.4.1 Fuel filter
Change according to inspection plan, chap-
ter 7.5.
Thoroughly clean the outside of the fuel
filter unit.
Unscrew the fuel filter cartridge (67/1) (by
possibly using a tightening scrap wrench)
and dispose of according to regulations.
Clean the sealing area of the filter carrier.
Fill the fuel filter with fuel.
Coat the seal on the fuel filter with fuel, and
screw in by hand until the seal of the fuel fil-
ter cartridge touches the filter head.
Fig. 67 Fuel filter cartridge
Turn the fuel filter cartridge with one more
half turn.
Check the tightness of the fuel filter car-
tridge.
7.6.4.2 Cleaning/replacing the fuel pre-

filter
ter 7.5.
Place suitable container below the filter
housing (68/1).
Open the drain plug (69/4) and drain the
fuel.
Tighten the drain plug (69/4).
Fig. 68 Fuel pre-filter
Unscrew the straining screw (69/1) and re-
move the filter housing (69/5) with the filter
insert (69/3).
Clean the sealing area of the filter carrier
(69/7) and the filter housing (69/5).
Insert the new sealing ring (69/6) and filter
insert (69/3) (replace the filter insert if nec-
essary).
Push the filter insert on the guide into the
filter housing (69/5) until approx. 3 cm are
projecting above the rim of the housing.
Fill fuel pre-filter with fuel.
Press the filter housing (69/5) with the filter
insert (69/3) and the sealing ring (69/6)
against the filter bracket (69/7) and screw in
position with clamping screw (69/1) (tighten-
ing torque 25 Nm).
Fig. 69 Fuel pre-filter
Start the engine; check if the fuel pre-filter is
tight.
MHL 350 7.17
7.6.4.3 Draining water from the fuel sys-

tem
Maintenance according to inspection plan,
chapter 7.5.
Water must be drained from the fuel system
through the fuel tank and the fuel pre-filter.
Collect the fuel-water mixture in a

suitable container.
Fuel tank
Drain water from the fuel tank via the drain
valve (70/1).
Screw the drain hose onto the drain valve
and drain water. As soon as fuel instead of
water escapes tighten drain valve.
Fuel pre-filter
Fig. 70 Drain valve
Open the drain plug (69/4) once a week and
observe the escaping liquid. As soon as fuel
instead of water escapes tighten drain plug.
7.6.4.4 Venting the fuel system

Start the engine and keep it running for
approx. 2 minutes fuel system is filled.
Unscrew the vent plug (69/8) until fuel es-
capes without bubbles.
Tighten the vent plug (69/8) (tightening
torque 25 Nm).
If the engine has not started after

max. 30 sec., turn the ignition key to
pos. 1 or 0, and pause for at
least 30 sec. before trying again.
Repeat the start-up procedure.
Do not drive the engine at full throt-

tle straight away. Drive with re-
straint until the engine reaches op-
erating temperature.
7.18 MHL 350

7.6.5 Air filter, air filter pipe
All maintenance work on the air

filter system must be carried out
with the engine off. Do not start the
engine while the main cartridge and
safety cartridge is removed.
7.6.5.1 Air filter pipe

Check the air filter attachment.
Check the tightness of the air filter pipe sec-
tion after the air filter. Examine rubber parts
for damage. Replace defective parts imme-
diately.
Empty the dust collector (72/5) and clean it.
The air filter must be serviced as soon as the
indicator lamp (71/41) on the operator control
panel lights up continuously. This lamp may Fig. 71 Air filter indicator lamp
light up briefly, but this is unimportant and is
mostly due to the engine speed being in-
creased too quickly.
Furthermore, a clogged filter makes itself no-
ticeable through smoky exhaust fumes and
perceptibly lower engine power.
7.6.5.2 Removal of the main cartridge

Folding back the brackets (72/1) and re-
move the cover (72/2).
Detach the hexagon nut and strain washer
(72/4) from the center rod.
Fig. 72 Dust collector
Withdraw the main cartridge (72/3) by twist-
ing it slightly to and fro.
The main cartridge must be installed in re-
verse order.
MHL 350 7.19

7.6.5.3 Cleaning the main cartridge
Never wash or brush out the main

cartridge. When blowing out, take
care to ensure that dust does not
land on the inside of the main car-
tridge.
The main cartridge can be cleaned up to 5x if
necessary. The main cartridge must be re-
max. 5 bar
placed once it reaches its maximum service
life of one year, at the latest. A note must be
made of the number of times it is cleaned.
For cleaning, a pipe the end of which is bent
at 90 should be attached to the compressed-
air pistol. It must be sufficiently long to reach
the floor of the cartridge. Blow out the main
cartridge from the inside to the outside with
dry compressed air (max. 5 bar) by moving
the pipe up and down in the cartridge. Con-
tinue until no more dust escapes (fig. 73).
Check the clean main cartridge for damage to
the paper bellows and rubber seals. Tears
and perforations in the paper bellows can be
MTK115076
determined using a torch.
Fig. 73 Cleaning the main cartridge
Never continue to use a damaged
main cartridge. If in doubt, use a new
one.
The main cartridge must be installed in re-
verse order.
7.6.5.4 Removing the safety cartridge

The safety cartridge is in the main cartridge.
Do not clean the safety cartridge

and do not use it again.
Remove the main cartridge.

The safety cartridge is removed in the same
manner as the main cartridge.
Insert a new safety cartridge.
Re-assemble the safety cartridge in reverse
order.
7.20 MHL 350

7.6.6 Cooling system Start the engine and bring to operating tem-
perature.
The machine has separate radiators for en-
gine cooling and hydraulic oil. Turn off the engine and allow to cool down.
7.6.6.1 Cleaning the radiator Check the coolant level and top up if re-
quired (several times, if necessary).
The radiator shall only be maintained Check the tightness of the cooling system.
and cleaned when the engine is not If the coolant level is too low, the indicator
running. lamp (71/38) lights up.
Clean according to inspection plan, chap-
ter 7.5.
Dirt accumulation in radiators

causes the engine and/or the hy-
draulic oil to overheat.
Clean both radiators (engine and hydrau-

lics) from the outlet side with compressed
air.
Blow out the engine with compressed air.
Remove any dirt.
7.6.6.2 Changing the coolant (engine ra-

diator)
Fig. 74 Vent plug
ter 7.5.
All work on the cooling system (e.g.

opening the radiator cap, removing
hoses) shall only be carried out
when the engine and the coolant
have cooled down. Hot coolant car-
ries a risk of scalding!

Remove the radiator cap.
Unscrew the drain plug (75/1) on the cylin-
der block and drain off the coolant.
Remove the lower water hose on the radia-
tor and drain off the coolant.
Screw the drain plug back on to the engine
and re-fit the water hose.
Release the vent plug (74/1) by 2 turns.
Fill the cooling system with coolant (see
"Filling quantities", chapter 3.17 and chapter
Fig. 75 Draining coolant
7.3.3.2). Close the cap and tighten the vent
plug (74/1).
MHL 350 7.21

7.6.7 Checking V-belts 7.6.7.3 Tensioning V-belts (water/fuel

pump)
Maintenance according to inspection plan,
chapter 7.5. Loosen the screws (77/1) and (77/2).
Worn or damaged V-belts must be Push the fuel pump (77/3) in the direction of
replaced immediately. arrow until the V-belt tension is correct.
Re-tighten the screws (77/1) and (77/2).
To check the tension, press the V-belt with
your thumb (exactly between the belt pulleys).
7.6.7.4 Replacing V-belts (water/fuel
Using moderate thumb pressure of approx.
pump)
45 N, the V-belt sag should equal 10 mm.
If a V-belt shows cracks or if it is dirtied by oil, Loosen the screws (77/1) and (77/2).
coolant, grease and the like, it must be re- Push the fuel pump (77/3) in opposite direc-
placed. tion of arrow until the V-belt can be re-
If new V-belts are mounted, their tension must moved.
be checked after 15 minutes of operation. Fit new V-belt.
7.6.7.1 Tensioning V-belts (generator) Push the fuel pump (77/3) in the direction of
arrow until the V-belt tension is correct.
Slacken the fastening screw (76/1) (do not
screw out completely). Re-tighten the screws (77/1) and (77/2).
Loosen the screws (76/2); do not unscrew

completely.
With the aid of a suitable tool, e.g. a crow-
bar, swivel the generator until the belt ten-
sion is correct.
Re-tighten the screws (76/1) and (76/2).
7.6.7.2 Replacing V-belts (generator)

Loosen the adjusting screw (76/1) (do not
screw out completely).
Loosen the screws (76/2); do not unscrew
completely.
Swivel the generator until the V-belt can be
removed. Fig. 76 V-belt (generator)
Fit new V-belt.

Tension the V-belt as described in chap-
ter 7.6.7.1.
Fig. 77 V-belt (water/fuel pump)
7.22 MHL 350

7.6.8 Checking and adjusting the valve

lash
Maintenance acc. to inspection plan, chap-
ter 7.5.
The valve lash shall be tested according to
the operating instructions provided by the en-
gine manufacturer and adjusted if necessary.
7.6.9 Battery
Before installing or removing the

battery, the electric circuit must be
interrupted by means of the battery
disconnect switch.
The instructions of the battery
manufacturer must be observed
when using the battery for the first
time.
Removing the battery

Disconnect first the negative then the posi-
tive cable.
Remove the fastening bracket and lift out
the battery.
Installing the battery
Insert the battery.
Connect first the positive then the negative
cable.
Ensure that the negative terminal is

attached to the negative pole (-)
and the positive terminal to the
positive pole (+).
In winter, in particular, the battery charge
should be closely monitored.
MHL 350 7.23

7.6.10 Bleeding the brake Screw in the set screw (80/3) until resis-
tance is tangible (brake linings sit close to
Maintenance and inspection plan, chapter 7.5.
the brake disc).
Collect the waste oil, do not allow it to Screw the set screw (80/3) back by half a
seep into the ground. Dispose of turn.
according to regulations!
Counter with nut (80/2).
Let the engine run at medium speed. Re-fit the cover (80/1).
Apply the parking brake!
Press the service brake pedal and lock in
place.
Remove the cap on the ventilation valve
(78/1) and fit suitable hose.
Direct the hose into a container.
Slightly loosen the ventilation valve using a
key (W/F 9) and keep open until the escap-
ing hydraulic oil is without bubbles in the
container.
Tighten the ventilation valve and re-fit dust
cap.
Bleed the other three brakes as described. Fig. 78 Brake
7.6.11 Bleeding the parking brake

Collect the waste oil, do not allow it

to seep into the ground. Dispose of
Let the engine run at medium revs.

Open the bleeder screws (79/1) on the
parking brake.
When hydraulic oil escapes without bub-
bles, close the bleeder screw (79/1). Fig. 79 Parking brake
7.6.12 Adjusting the play of the parking

brake
Remove the cover (80/1). Non-standard version
with extra-long guide pin
Loosen the counternut (80/2).
Fig. 80 Adjusting the parking brake
7.24 MHL 350

7.6.13 Venting the oscillating axle cylin-

ders
Collect the waste oil, do not allow it to

seep into the ground. Dispose of
The oscillating axle shall not be locked; in-

dicator lamp (81/55) lights up.
Jack up the machine so that the wheels of
the oscillating axle are off the ground.
Release the parking brake (hand brake)
(81/19).
Run the engine at medium speed.
Open the vent plugs (82/1) one after the
other, until there are no bubbles in the es-
caping hydraulic oil.
Close the vent plugs.
Fig. 81 Oscillating axle lock
Fig. 82 Vent plugs
MHL 350 7.25

7.6.14 Hydraulic oil

For hydraulic oil filling quantities and specifi-
cations, see chapter 3.17 3.18.
ter 7.5 and oil analyses, chapter 7.1.1.
Changing the hydraulic oil
Change the hydraulic oil at operat-

ing temperature.
Collect the oil, do not allow it to
seep into the ground. Dispose of in
the proper manner!
Before filling in hydraulic oil the ap-
propriate preparations for the work
to be done must be made (e.g. a
platform).
Retract all hydraulic cylinders.

Switch off the diesel engine.
Fig. 83 Cap
Unscrew the ventilation filter (84/1).
Open the covers (84/2) of the return filters
and remove the complete filter assemblies.
Unscrew the cap (83/1) of the drain valve.
Insert the oil drain hose (included in the tool
set) into a collecting pan before it is
screwed on.
Screw on the oil drain hose.
Flush and clean the hydraulic tank as re-
quired.
Unscrew the oil drain hose and seal the
drain valve with the cap.
Fill up with clean hydraulic oil via the open-
Fig. 84 Filter covers
ings of the return filters (84/2).
Screw in the ventilation filter.
Close the covers (84/2) of the return filters
and install the complete filter assembly.
7.26 MHL 350

7.6.15 Hydraulic oil return filters

ter 7.5.
Replacing the return filter
Before replacing the hydraulic oil

return filter, the appropriate prepa-
rations for the work to be done must
be made (e.g. a platform).
The way how to proceed applies to
both return filters!
The filter element (85/2) (Exapor)
cannot be cleaned.
Remove the cover (85/1) of the return filter.

Remove the complete return filter from the
tank by the bracket (85/6).
Place an open-jaw wrench on the hex head
(85/5) and push a rod through the bracket
(85/6). Release the screen element (85/7)
from the return filter (85/2) by turning.
The screen element (85/7) must be

cleaned as described below every
time the filter element is changed!
Unscrew the screen element (85/7) and

clean with a neutral detergent.
Fig. 85 Return filters
Using a compressed-air pistol, blow out
from the outside to the inside.
Screw the new filter element on the cleaned
screen element.
Ensure that the seal between the screen
element and filter element is lying flat.
Clean the O-ring (85/3) between the hydrau-
lic tank and the return filter cover.
Check the O-ring (85/4) and replace if nec-
essary.
Insert the new return filter in the tank with
the O-ring.
Fasten the cover of the return filter to the
tank with the O-ring.
MHL 350 7.27

7.6.16 Hydraulic oil tank ventilation filter

ter 7.5.
Remove the ventilation filter (84/1), replace it
with a new one and tighten by hand.
Replace the ventilation filter if the

cap is dirty, e.g. due to overfoaming
hydraulic oil.
7.6.17 Blocking off the hydraulic oil on the

tank
To enable repairs to the intake line, the hy-
draulic pump or the hydraulic lines to be un-
dertaken without having to drain the oil from
the tank, the oil supply line to the hydraulic
pumps can be blocked off.
Remove the fillister-head screws (86/1) on
the retaining fixture.
Remove the retaining fixture (86/2).
The square is turned 90 using a fork
wrench from the open position (87/1) to the
shut-off position (87/2).
The marking on the end face of the

square must lie across the passage. Fig. 86 Blocking off the hydraulic oil
When repair work is complete, it is
essential to turn back the square to
the open position (87/1) before the
engine is switched on.
Fasten the retaining fixture (86/2) once

more with the fillister-head screws (86/1).
Fig. 87 Direction of flow
7.28 MHL 350

7.6.18 Changing axle oil and transmission

oil
For filling quantities and oil specifications, see
chapters 3.17 3.18.
The axle oil must be changed at operating
temperature.
Collect the oil, do not allow it to seep

into the ground. Dispose of in the
proper manner!
After filling the axles with oil, move
the machine for approx. 5 minutes in
order to ensure that the oil is distrib-
uted. Check the oil level again and
top up if necessary.
7.6.18.1 Front axle differential
The wheel hubs and axle casings

(differentials) of the steering axle
have separate oil chambers.

Apply the parking brake.
Open the checking and filler plug (88/1).
Open the drain plug (88/2) and drain the oil.
Purge the axle if necessary.
Close the drain plug carefully.
Fill in oil.
Carefully close the checking and filler plug.
7.6.18.2 Rear axle differential Fig. 88 Front axle differential

Apply the parking brake.
Purge the axle if necessary.
Carefully close the drain plug.
Fill in oil.
Fig. 89 Rear axle differential
MHL 350 7.29

7.6.18.3 Wheel hubs
The wheel hubs and axle casings

(differentials) of the steering axle
have separate oil chambers.
Turn the wheel until the drain plug (90/2) is

at the bottom.
Open the checking and filler plug (90/1). 1
Open the drain plug and drain the oil.
Purge if necessary. 2
Close the drain plug carefully. 380-027-008
Fill in oil via the checking and filler plug Fig. 90 Wheel hubs
(90/1).
Close the screw plug carefully.
7.6.18.4 Power shift transmission

Purge if necessary.
Carefully close the drain plug.
Fill in oil.
Fig. 91 Power shift transmission
7.6.19 Swing transmission
Park the machine on level ground. 1
2
Unscrew the cap on the oil filler neck (92/2).
Remove the cover (92/4).
Remove the hose (92/3) through the service
opening.
Open the drain valve on the hose (92/3) and 3
drain the oil.
4
Carefully close the drain valve and re-
position the hose.
Re-fit the cover (92/4).
Pour in oil.
Check the oil level using the oil dipstick
Fig. 92 Swing transmission
(92/1).
Carefully close the oil filler neck (92/2) with
the cap.
7.30 MHL 350

7.6.20 Tightening torques
Contact faces of bolt heads must be of bright metal.
Fig. 93 Tightening torques
Position Tightening torque

1 630 Nm
2 195 Nm
3 195 Nm
MHL 350 7.31

7.6.21 Changing transmission oil grab

and magnet
For oil specifications and filling quantities, see
chapters 3.17 3.18.
The transmission oil must be changed at
operating temperature.
Collect the oil, do not allow it to

seep into the ground. Dispose of in
the proper manner!
Lay the grab or magnet down so that oil can

flow unhindered into an oil pan.
Slacken the screw plug (94/1, 95/1).
Stand the grab or magnet upright again and
position horizontally. Fig. 94 Transmission oil change
Pour in oil and close the screw plug care-
fully.
Fig. 95 Transmission oil change
7.32 MHL 350

7.7 Care and cleaning 7.8 Preservation (temporary shutdown)

The machine must be cleaned on a suitable In order to prevent damage (corrosion, etc.)
surface with an oil separator. from storage during shutdown periods over
three months, certain preservation measures
A steam-jet appliance shall not be used for must be taken:
cleaning during the first two months after
the machine is used for the first time or We recommend keeping the machine in a
when newly painted. dry, dust-free room during the storage pe-
riod.
Do not use aggressive detergents for clean-
ing the machine. We recommend using Clean the inside and outside of the machine
commercially available cleaning agents for thoroughly, including the engine.
passenger cars.
Lubricate the machine according to the lu-
When cleaning with a steam-jet appliance, brication plan.
the hot water jet shall not exceed 80 C and
Check the oil levels of all assemblies such
a spray pressure of 20 bar. The nozzle must
as axles, transmissions, etc. and top up if
be at a minimum distance of 30 cm from the
necessary.
machine.
Check the hydraulic oil level and top up if
The slewing ring of the machine shall not
necessary.
be cleaned with a high-pressure or steam-
jet cleaner, as otherwise the grease is Repair paint damages.
washed away.
Fill the diesel tank completely, in order to
Linings (insulating materials, etc.) shall not prevent corrosion of the tank walls.
be exposed directly to water, steam or high-
Check the antifreeze level in the coolant
pressure jets.
and adjust if necessary.
When cleaning with water or steam jets,
Perform all the preservation measures con-
take care not to spray exhaust-gas and air
tained in the diesel engine operating instruc-
filter openings.
tions.
If cleaning the engine with water or steam Treat bare piston rods with a commercially
jets, do not expose sensitive engine parts, available anti-corrosion agent.
such as generator, cabling, oil pressure
switch, etc. directly to the jet. Remove and clean the battery and store it
as specified in a dry in winter, frost-proof
Remove dirt from the twin tires. room. Coat connections with a little pole
After each wet clean, the machine must be grease.
lubricated in accordance with the lubrication Seal off the air intake opening of the air
plan. In the case of machines with central filter system and the exhaust pipe opening.
lubricating system, three lubricating proc-
esses must be manually triggered. To acti-
vate manual lubrication, please read chap-
ter 7.4.1.4, "Trigger additional lubrication".
After each wet clean, all work cycles and
driving functions must be performed.
MHL 350 7.33

7.8.1 During shutdown

When the machine is out of use for 6 months,
after this time all assemblies must be brought
to operating temperature and maneuvered for
approx. 15 minutes. Beforehand, the anti-
corrosion coat must be removed from the pis-
ton rods, and the openings of the air filter sys-
tem and the exhaust pipe freed. After the ma-
neuvering cycle, preserve the machine once
more as previously described.
7.8.2 After shutdown

Before putting the machine into operation
once more, the anti-corrosion coat must be
cleaned from the piston rods. The openings
of the air filter and exhaust pipe must be
freed. Clean the machine with a neutral de-
tergent (see chapter 7.7).
Check and install the battery.
Carry out all measures for putting the diesel
engine back into operation stated in the en-
gine operating instructions.
If the machine has been out of use for more
than 6 months, the oil in assemblies such as
axles, transmissions, etc. must be changed.
Lubricate the machine according to the lu-
brication plan.
7.34 MHL 350

TABLE OF CONTENTS
Page
8 TROUBLE-SHOOTING
8.1 Trouble-shooting........................................................................................................... 8.1
8.1.1 General.................................................................................................................. 8.1
8.1.2 Lowering the work equipment when the engine has shut down ............................. 8.1
8.1.3 Malfunctions in central electric system ................................................................... 8.1
8.1.4 Malfunctions in magnet system.............................................................................. 8.1
8.1.5 Malfunctions in the CEB-control ............................................................................. 8.2
8.1.5.1 Disconnection of the CEB-control ................................................................... 8.2
8.1.5.2 Re-activating the CEB-control ......................................................................... 8.3
MHL 350
TROUBLE-SHOOTING 8
8.1 Trouble-shooting 8.1.4 Malfunctions in magnet system

8.1.1 General If there are malfunctions in the magnet sys-
tem, check the fuses in the switch box. The
Malfunctions are often the result of incorrect
switch box of the magnet system (97/1) is
handling of the machine, the use of unsuitable
located below the hood, front right-hand side.
fuels, lubricants and coolants, or irregular
maintenance. Assignment of fuses see appendix, chapter 9.
If fuses are not defective, contact Customer
The following table presents a summary of a
Service.
range of problems and their probable causes.
If a problem can only be eliminated through
repair, then the responsible Service Agent
must be called in.
All defects and faults in the diesel engine
must be examined as described in the sepa-
rate engine operating instructions.
During the warranty period, malfunctions must
be dealt with by the responsible Service
Agent or a specialist workshop.
8.1.2 Lowering the work equipment when

the engine has shut down
If the diesel engine shuts down, lower the
work equipment by means of the four-way
control levers (see chapter 5.1.1 "Operation of
work equipment") using the available pilot
pressure. The ignition must be switched on. Fig. 96 Central electric system
8.1.3 Malfunctions in central electric sys-

tem
The fuse protection of the electric circuits and
relays are located in the central electric sys-
tem (96/1) which is in the service section.
If there are malfunctions, check fuses. If fuses
are not defective, contact Customer Service.
Assignment of fuses see appendix, chapter 9.
Fig. 97 Switch box of the magnet system
MHL 350 8.1

8 TROUBLE-SHOOTING
8.1.5 Malfunctions in the CEB-control

If malfunctions occur in the system of the
CEB-control, the warning lamp (98/49) lights
up. On the electronic box of the CEB-control
(99/1) there is a fault display emitting a trouble
code in the form of LEDs (light-emitting di-
odes) (1 8). Please inform your Service
Agent about this trouble code.
Whenever the ignition is switched on, a sys-
tem check takes place. All 8 diodes light up
for 2 seconds; diodes 1, 2 and 4 light up for
another 10 seconds. When the system is Fig. 98 Warning lamp
trouble-free, all diodes must be off after this
period of time with the engine running.
8.1.5.1 Disconnection of the CEB-control

In order to ensure that the engine continues to
operate in the event of control malfunctions,
the control can be disconnected. During this
emergency service, the machines use is
limited.
It is essential that the following ac-

tivities are performed in the given
sequence.
Set the engine speed control lever to mini-

mum speed (forward).
Switch off the engine and the ignition.
Reduce pilot pressure (see chapter 7.1.2).
Switch off the CEB-control by pressing the
switch next to the electronic box (99/1); the
indicator lamp in the switch and the lamp
(98/49) lights up (with ignition switched on).
Remove the guard above the injection pump
adjusting cylinder.
Position the ball valve (100/1) for the injec-
tion pump adjusting cylinder horizontally.
Unhinge the adjusting cylinder (101/1).
Remove the screw (101/3) from the side drill
hole of the locking element.
Move the speed adjusting cylinder (101/2)
until the screw (101/3) can be screwed in
the thread on the face side (101/4).
Start the engine.
The engine now runs at full throttle with per-
formance restricted.
8.2 MHL 350

TROUBLE-SHOOTING 8
8.1.5.2 Re-activating the CEB-control

Once the malfunctions in the CEB-control
have been remedied, the deactivation must be
undone and the CEB-control re-activated.
It is essential that the following ac-

tivities are performed in the given
sequence.
Stop the engine and switch off the ignition.

Remove the screw (101/3) from the thread
on the face side (101/4) of the speed adjust-
ing device (101/2).
Re-fit the adjusting cylinder (101/1).
Screw back in the screw (101/3) into the Fig. 99 Electronic box
side drill hole of the locking element.
Position the ball valve (100/1) for the injec-
tion pump adjusting cylinder vertically.
Re-fit the guard above the injection pump
adjusting cylinder.
Switch on the CEB-control by pressing the
switch next to the electronic box (99/1); the
indicator lamp in the switch and the lamp
(98/49) does not light up (when the ignition
is switched on).
Start the engine.
The system is trouble-free when the diodes in
the display of the electronic box go out after
approx. 12 seconds (following the system
check). Fig. 100 Ball valve
Fig. 101 Speed adjustment
MHL 350 8.3

8 TROUBLE-SHOOTING
Fault Possible cause Remedy

No steering
1 Oil supply to hydraulic pump interrupted Check and repair suction line
2 Hydraulic pump defective Remedy fault (specialist)
3 Steering control unit defective Remedy fault (specialist)
4 Priority valve defective Remedy fault (specialist)
5 Steering cylinders defective Repair, replace
No brake pressure
1 Oil supply to pump interrupted Check and repair suction line
2 Hydraulic pump defective Remedy fault (specialist)
3 Shut-off valve defective Remedy fault (specialist)
Insufficient braking power
1 Foot-brake valve defective Remedy fault (specialist)
2 Oil loss in brake system Check and repair
3 Discontinuous buzzing tone Malfunction in service brake system. Lowest
brake pressure range of 90 bar not reached.
Check and repair
Parking brake cannot be released
1 No brake pressure Check oil supply to pump and shut-off valve,
repair or replace
2 Disc brake is sticking Check and repair
3 Parking brake valve defective Check and repair or replace
4 Oil loss in parking brake system Check and repair
Hydraulic oil exceeds max. permissible temperature
1 Thermostat defective Replace
2 Oil level too low Top up oil to mark on sight glass
3 Dirt in radiator Clean
Sluggish acceleration and deceleration, too little propulsive power
1 Insufficient engine power Check fuel supply (filters)
2 One of the brakes is sticking Check, remedy fault
3 Oil loss in rotary transmission Remedy fault (specialist)
4 Air filter clogged Clean or replace
8.4 MHL 350

TROUBLE-SHOOTING 8

5 1st/2nd gear does not shift Check power supply and solenoid valve,
repair, replace
6 Fault in brake actuation Check, adjust
7 High pressure too low Check high pressure, replace or re-adjust
HP valves if necessary.
8 Pump does not travel fully Check, re-adjust (specialist)
9 Internal damage to variable displacement Replace units (specialist)
pump or motor
Transmission works in one direction only
1 Power supply to solenoid valve inter- Check and repair, replace if necessary (incl.
rupted, gets stuck or is defective negative connection)
Transmission works in neither direction
1 Too little hydraulic oil in tank Top up to mark on sight glass
2 Solenoid valve defective Check and repair or replace
3 Power supply to solenoid valve interrupted Check and repair
4 No pilot pressure Measure pressure and detect fault
5 Internal damage to pump or motor Replace complete unit (specialist)
6 Mechanical connection to axle interrupted Check, repair
Loading machine equipment does not function
1 Left-hand armrest raised or microswitch Check and repair or replace if necessary
defective
2 Oil supply to hydraulic pump interrupted Check lines
3 Hydraulic pump has failed Get hydraulic pump checked by a specialist,
replace complete pump if necessary
4 Maintenance steps folded down Fold up maintenance steps
5 Main pressure relief valve has failed Check main pressure relief valve and re-
place complete valve if necessary (by spe-
cialist)
MHL 350 8.5

8 TROUBLE-SHOOTING

Machine is working too slowly, system gets too hot
1 Main pressure relief valve set too low or is Reset main pressure relief valve, replace if
faulty necessary (by specialist)
2 Hydraulic pump has impermissible degree Replace hydraulic pump
of wear
3 Incorrect hydraulic oil Hydraulic oil must be of the recommended
quality
4 Air in hydraulic system Vent the pilot control.
Tighten connections with engine off and
system relieved of pressure.
5 Fine-Mode not set to 0 Check if Fine-Mode is set to 0; set to 0 if
required
Hydraulic cylinders are weakening
1 Sleeve sets in hydraulic cylinders are Replace sleeve sets
worn
2 Faulty secondary valves Check secondary valves, replace if neces-
sary.
Slewing motion of the uppercarriage cannot be stopped
1 Defective slewing brake Re-seal foot brake pedal, replace discs
2 Faulty secondary valves Reset secondary valves, replace if neces-
sary.
Trouble in the magnet device
1 In the event of malfunctions in the magnet Remedy fault (by specialist)
device, e.g. no magnetizing function or no
de-magnetizing function
8.6 MHL 350

TROUBLE-SHOOTING 8

Problems in the electrics
1 Outside and/or interior light does not Check cables, connections, bulbs and
come on fuses.
2 Windshield wiper does not work Check cables, connections and fuses. Ex-
amine windshield wiper for mechanical
damage. Corrosion on contacts between
windshield and cab. Replace complete
wiper if necessary.
3 Horn does not work Check cables, connections and fuses. Re-
place complete horn and get cause of fail-
ure investigated by a specialist.
4 Warning/indicating elements are impre- Get the source of the problem determined
cise and remedied by a specialist.
5 Starting system does not work satisfacto- Check charge capacity of battery. Test
rily starter functions. Check connection and
condition of power and battery ground ca-
bles. Get function of ignition lock checked,
replace if necessary.
Work attachments
1 Grab does not open or close or opens and Check quick coupling, replace if required
closes too slowly
2 Grab fails to rotate Check quick coupling and electrical connec-
tion between micro switch and solenoid
valve
MHL 350 8.7

8.8 MHL 350

APPENDIX
9 APPENDIX
Table of daily / weekly maintenance tasks
Assignment of fuses
Index of Pictures
MHL 350
APPENDIX 9
Daily tasks
Inspection and maintenance tasks to be performed by service personnel
Area Criterion Test method Test interval Measure
Hydraulic oil tank Oil level Visual inspection Daily Top up oil as
required
Engine Oil level Visual inspection Daily Top up oil as

required
Cooling system Coolant level Visual inspection Daily Top up coolant as

required
Fuel tank Fuel level Visual inspection Daily Fill in fuel as

via fuel gauge required
Hydraulic system Tightness Visual check Daily Tighten couplings,

replace hoses and
lines, replace leaky
hydraulic
components
Machine as a Damage, missing Visual inspection Daily Get repaired,

whole equipment replace equipment
Lighting, warning Defective bulbs Function test, Daily Replace bulbs as

and indicator visual inspection required
lamps
Operator controls Ease of operation Function test Daily Get operator

controls replaced
Manual Impurities in Daily Grease according

lubricating points lubricant to lubrication plan,
pages 7.8 7.12
MHL 350
9 APPENDIX
Weekly tasks
Area Criterion Test method Test interval Measure
Water separator Dirt and water Visual inspection Weekly Drain as required
level
Cooling system Cleanness of Visual inspection Weekly Clean as required

cooling fins
Air conditioning Coolant level, Visual inspection Weekly Get repaired if

(optional) tightness and using sight glass necessary
function and function test
Swing assembly Fastening of Check torque Weekly Tighten bolts

hydraulic motor, using torque
transmission, ring wrench
gear
Wheels Tightness of Check torque Weekly Tighten wheel nuts

wheel nuts using torque
wrench
Axles, propeller Tightness of bolts Check torque Weekly Tighten bolts

shafts using torque
wrench
Engine hood Function of Visual inspection Weekly Replace if

pneumatic and function test necessary
springs
Brakes Function Function test Weekly Get repaired if

necessary
Manual Impurities in Weekly Grease according

lubricating points lubricant to lubrication plan,
pages 7.8 7.12
MHL 350
APPENDIX 9
Assignment of fuses
Fuse no. Release Terminal Function

current designation
F1 10 A Terminal 15 Ignition control, engine shut-off, operating hour meter,
charge control, coolant level sensor
F2 7.5 A Terminal 15 Tank temperature indicator, engine overheating, coolant
level indicator, air filter, engine oil pressure, hydraulic oil
temperature
F3 7.5 A Terminal 15 Brake pressure monitoring, overloading warning device *,
hand brake, oscillating axle lock, travel, transmission
st nd
control (1 /2 gear)
F4 5A Terminal 15 Engine overheat protection, working hydraulics cut-off
F5 15 A Terminal 15 Work zone extension, grease lubrication system, cab up/
down, instrument light, oil radiator
F6 10 A Terminal 15 Grab rotation, bypass, pressure increase
F7 5A Terminal 15 Turn signals
F8 3A Terminal 15 Lower beam control
F9 20 A Terminal 15 Wash/wipe systems of both windows, driver's seat,
CEB-control trouble indicator lamp
F 10 4A Terminal 15 CEB-control
F 11 7.5 A Terminal 15 Dozer blade *, change-over of work functions *
F 12 10 A Terminal 15 Individual outriggers *
F 13 15 A Terminal 15 Reserve Terminal 15 *
F 14 15 A Terminal 30 Supplementary heating, air heating
F 15 5A Terminal 30 Supplementary heating, control unit
F 16 20 A Terminal 30 Reserve Terminal 30
F 17 10 A Terminal 30 Hazard warning system
F 18 10 A (or 15 A or Terminal 30 Operating current for additional working floodlight, horn
20 A)
F 19 10 A Terminal 30 Parking light, right, working floodlight on box-type boom
F 20 10 A Terminal 30 Parking light, left, control current for additional working
floodlight *, lower beam
F 21 15 A Terminal 30 Rotating beacon(s) *, radio *, socket 24 V, cigarette
lighter, interior lighting
F 22 20 A Terminal 30 Fan, heating, air conditioning thermostat *
F 23 15 A Terminal 30 Condenser fan of air conditioning *
F 24 20 A Terminal 30 Magnet device *
F 33 40 A Terminal 30 Series fuse F 1 and start-up
F 34 70 A Terminal 30 Main fuse for Terminal 15
* optional
MHL 350
9 APPENDIX
Index of Pictures
Fig. 1 Vehicle identity number Fig. 51 Rear axle
Fig. 2 Dimensions Fig. 52 Front axle
Fig. 3 Dimensions Fig. 53 Wheel hub
Fig. 4 General structure Fig. 54 Swing transmission
Fig. 5 Working envelope (13.5 m loading Fig. 55 Power shift transmission
equipment) Fig. 56 Grab
Fig. 6 Table of carrying capacity (13.5 m loading Fig. 57 Magnet
equipment) Fig. 58 Overview of lubricating points
Fig. 7 Working envelope (15 m loading equipment) Fig. 59 Steering cylinder
Fig. 8 Table of carrying capacity (15 m loading Fig. 60 Steering gear case
equipment) Fig. 61 Propeller shaft
Fig. 9 Grab Fig. 62 Oscillating axle
Fig. 10 Magnet Fig. 63 Button for lubrication
Fig. 11 Lift hook Fig. 64 Grease container
Fig. 12 Operator controls Fig. 65 Oil change valve
Fig. 13 Operator control panel Fig. 66 Engine oil filter cartridge
Fig. 14 Starting the engine Fig. 67 Fuel filter cartridge
Fig. 15 Switching off the engine Fig. 68 Fuel pre-filter
Fig. 16 Driver's seat Fig. 69 Fuel pre-filter
Fig. 17 Steering wheel adjustment Fig. 70 Drain valve
Fig. 18 Heating and ventilation Fig. 71 Air filter indicator lamp
Fig. 19 Heating Fig. 72 Dust collector
Fig. 20 Air conditioning Fig. 73 Cleaning the main cartridge
Fig. 21 Opening/closing the windshield Fig. 74 Vent plug
Fig. 22 Opening the door Fig. 75 Draining coolant
Fig. 23 Door catch Fig. 76 V-belt (generator)
Fig. 24 Releasing the door from the catch Fig. 77 V-belt (water/fuel pump)
Fig. 25 Positioning the cab Fig. 78 Brake
Fig. 26 Ball valve Fig. 79 Parking brake
Fig. 27 Driving Fig. 80 Adjusting the parking brake
Fig. 28 Driving Fig. 81 Oscillating axle lock
Fig. 29 Parking the machine Fig. 82 Vent plugs
Fig. 30 ISO control Fig. 83 Cap
Fig. 31 Increasing the operating pressure Fig. 84 Filter covers
Fig. 32 Outriggers Fig. 85 Return filters
Fig. 33 Disabling work functions Fig. 86 Blocking off the hydraulic oil
Fig. 34 Oscillating axle lock Fig. 87 Direction of flow
Fig. 35 Direct mounting Fig. 88 Front axle differential
Fig. 36 Quick-attach system Fig. 89 Rear axle differential
Fig. 37 Slewing the uppercarriage Fig. 90 Wheel hubs
Fig. 38 Operation of magnet device Fig. 91 Power shift transmission
Fig. 39 Transmission control Fig. 92 Swing transmission
Fig. 40 Transmission control Fig. 93 Tightening torques
Fig. 41 Loading onto a flat-bed trailer or train Fig. 94 Transmission oil change
Fig. 42 Transport of the machine Fig. 95 Transmission oil change
Fig. 43 Fixing the machine Fig. 96 Central electric system
Fig. 44 Letting off residual pressure Fig. 97 Switch box of the magnet system
Fig. 45 Fuel level Fig. 98 Warning lamp
Fig. 46 Tank cap Fig. 99 Electronic-Box
Fig. 47 Water separator Fig. 100 Ball valve
Fig. 48 Engine radiator Fig. 101 Speed adjustment
Fig. 49 Hydraulic oil sight glass
Fig. 50 Cleaning the radiator
MHL 350

Ba MHL350 0493

Uploaded by

Copyright:

Available Formats

Ba MHL350 0493

Uploaded by

Document Information

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Ba MHL350 0493

Uploaded by

Copyright:

Available Formats

What are the different chapters in the document?

What are the different chapters in the document?

What are some of the components described in the appendix?

What are some of the components described in the appendix?

OPERATING INSTRUCTIONS

Mobile Hydraulic Loading Machine

FUCHS-BAGGER GMBH & CO. KG MASCHINENFABRIK D-76669 BAD SCHNBORN

Chapter Subject Staff members

1 FOREWORD Operating staff

2 SAFETY AND ACCIDENT Operating staff

3 TECHNICAL DATA Operating staff

4 CONTROL Operating staff

5 WORK OPERATION Operating staff

6 TRANSPORT AND Operating staff

7 CARE AND MAINTENANCE Inspection, Maintenance and Repair

8 TROUBLE SHOOTING Operating staff

9 APPENDIX Operating staff

1.1 General 1.2 Proper use

MHL 350 1.1

1.3 Abbreviations and equivalent expres- 1.5 Warranty and maintenance

1.2 MHL 350

Please state the vehicle identity

1.6 Environmental standards

MHL 350 1.3

Display Description Function Description

Direction indicator control lamp Working floodlight(s)

Battery charge indicator Lower beam

Engine oil pressure Cab up/down

Central lubricating system

Pre-heating Work zone extension

Engine air filter clogging indicator Speed range 1st/2nd gear

in an emergency only: discon-

Hydraulic oil temperature Windshield wash/wipe

CEB-control Overload warning device

Coolant level indicator lamp Magnet system

Coolant temperature Auto-idling system

Fuel level Hazard warning system

Oscillating axle lock/

1.4 MHL 350

Symbol Description Symbol Description

Safety distance Hydraulic oil

Danger of injury Fuel

Lashing point Suspension point for loading by

MHL 350 1.5

1.8 Operating instructions provided by

Operating instructions Manufacturer

1.10 Company address

1.10.2 Spare parts

Reference number: 5 781 120 707

1.6 MHL 350

2.1 Introductory remarks Protective work clothing must be worn during

2.2 General safety notes

MHL 350 2.1

2.3 Operation If the above safety distance cannot be

2.4 Danger zone

2.2 MHL 350

2.6 Stability Before driving downhill, the appropriate gear

2.7 Travel operation

MHL 350 2.3