Case WX90 User manual

Excavator
WX90
Service Manual
Cre 9-35990

Cre 9-35990
Copyright 2001 Case France
Printed in France
October 2001
NOTE: CASE Company reserves the right to make changes in the specification and design of the machine
without prior notice and without incurring any obligation to modify units previously sold.
The description of the models shown in this manual has been made in accordance with the technical spec-
ifications known as of the date of design of this document.
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IN-3
INTRODUCTION WX90
15501 9-35990
TO THE READER
• This manual has been written for a skilled
technician, in order to give him the
information necessary to repair this
machine.
- Read this manual carefully for correct
information about repair procedures.
- For any question or comment, or in case
you notice a mistake in this manual
content, please contact:
CASE FRANCE S.A.
18, place des Nymphéas
ZI Paris Nord II - 93420 Villepinte
FRANCE
ADDITIONAL REFERENCE MANUALS
• In addition to this Workshop Manual, refer also
to the following:
- Operation and maintenance instruction
manual
- Spare parts catalog
DESCRIPTION OF THE COMPLETE
WORKSHOP MANUAL
• The complete repair manual consists of one
volume:
WX90 - Workshop Manual "Excavator"
• “Excavator" Workshop Manual contains the
technical information necessary for machine/
engine service and repair, service equipment,
information on maintenance standards, remove
and install procedures, disassembly and
assembly procedures.
• The complete Workshop Manual for the
excavator model 9-35990 consists of the
following volume identified by print number as
shown herebelow:
VOLUME
Workshop Manual - "Excavator"
MACHINE TYPE
WX90
PRINT No.
9-35990
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INTRODUCTION WX90
IN-4
15501 9-35990
AVOID ACCIDENTS
Most accidents, whether they occur in industry, on the farm, at home or
on the highway, are caused by the failure of some individuals to follow
simple and fundamental safety rules or precautions. For this reason
MOST ACCIDENTS CAN BE PREVENTED by recognising the real
cause and doing something about it before the accident occurs.
Regardless of the care used in the design and construction of any type
of equipment there are conditions that cannot be completely safeguarded
against without interfering with reasonable accessibility and efficient
operation.
Carefully read indications, cautions and safety warning quoted in the
“SAFETY RULES” section.
A careful operator is the best insurance against an accident.
The complete observance of one simple rule would prevent many
thousand serious injuries each year.
That rule is:
Never attempt to clean, oil or adjust a machine while it is in motion.
ATTENTION
On machines having hydraulically, mechanically and/or cable
controlled equipment (such as showels, loaders, dozers, scrapers
etc.) be certain the equipment is lowered to the ground before
servicing, adjusting and/or repairing. If it is necessary to have the
equipment partially or fully raised to gain access to certain items,
be sure the equipment is suitably supported by means other than
the hydraulic lift cylinders, cable and/or mechanical device used
for controlling the equipment.
COPYRIGHT BY CASE FRANCE SA
18, place des Nymphéas ZI Paris Nord II - 93420 Villepinte France
All rights reserved. Reproduction of text and illustrations in whole or in part,
is strictly prohibited.
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15501 9-35990
SECTION 1 HOW TO USE
INDEX WX90 - 1 - 1
INDEX
Group 1 - SECTIONS AND GROUPS INDEXES ........................................................... HU1-1-1
Group 2 - INTRODUCTION ............................................................................................ HU1-2-1
2.1 Introduction
2.2 Manual handling
2.3 Symbols and indications
Group 3 - FEATURES OF THE MANUAL ...................................................................... HU1-3-1
3.1 Manual composition
3.2 Brief information for manual consultation
WX90
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15501 9-35990
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HU1-1-1
SECTIONS AND GROUPS INDEXES WX90
15501 9-35990
SECTION 1 - HOW TO USE
Group 1 - SECTIONS AND GROUPS INDEXES ........................................................... HU1-1
Group 2 - INTRODUCTION ............................................................................................ HU1-2
Group 3 - FEATURES OF THE MANUAL ...................................................................... HU1-3
SECTION 2 - SAFETY RULES
Group 1 - GENERAL INFORMATION ............................................................................ SR2-1
Group 2 - SAFETY RULES ............................................................................................ SR2-2
Group 3 - SAFETY DECALS .......................................................................................... SR2-3
SECTION 3 - SPECIFICATION
Group 1 - GENERALITY..................................................................................................SP3-1
Group 2 - TECHNICAL SPECIFICATIONS ..................................................................... SP3-2
Group 3 - LUBRICANTS AND SPECIFICATIONS .......................................................... SP3-3
SECTION 4 - SUPERSTRUCTURE
Group 1 - SUPERSTRUCTURE ......................................................................................SS4-1
Group 1A - FLEXIBLE HOSES AND CONNECTIONS ................................................ SS4-1A
Group 2 - HYDRAULIC PUMPS ................................................................................... HYP4-2
Group 3 - CONTROL VALVE ......................................................................................... CV4-3
Group 4 - SWING DEVICE ........................................................................................... SRD4-4
Group 5 - PILOT VALVES ............................................................................................... PV4-5
Group 6 - CENTER JOINT .............................................................................................. CJ4-6
Group 7 - STEERING VALVE ......................................................................................... SV4-7
Group 8 - BRAKE PEDAL VALVE ................................................................................ BRV4-8
Group 9 - ACCUMULATORS ....................................................................................... ACC4-9
Group 10 - SOLENOID VALVES ................................................................................ SOV4-10
SECTION 5 - UNDERCARRIAGE
Group 1 - UNDERCARRIAGE ........................................................................................ UC5-1
Group 2 - TRAVEL HYDRAULIC MOTOR ................................................................... HYP4-2
Group 3 - TRANSMISSION ............................................................................................ CV4-3
Group 4 - AXLES .............................................................................................................AX5-4
Group 5 - TRANSMISSION SHAFT ................................................................................ TS5-5
SECTION 6 - FRONT-END ATTACHMENT
Group 1 - FRONT-END ATTACHMENT.......................................................................... FA6-1
Group 2 - HYDRAULIC CYLINDERS ............................................................................. CY6-2
Group 3 - PINS AND BUSHINGS.................................................................................... FA6-3
SECTION 7 - HYDRAULIC SYSTEM
Group 1 - GENERALITIES ............................................................................................. HS7-1
Group 2 - MAIN HYDRAULIC SYSTEM ......................................................................... HS7-2
Group 3 - PILOT/BRAKES SYSTEM.............................................................................. HS7-3
Group 4 - STEERING SYSTEM ..................................................................................... HS7-4
Group 5 - BRAKES SYSTEM ......................................................................................... HS7-5
Group 6 - OPERATION OF CIRCUITS .......................................................................... HS7-6
Group 7 - TRAVEL CIRCUIT .......................................................................................... HS7-7
Group 8 - HYDRAULIC SYSTEM DIAGRAM ................................................................. HS7-8
1. SECTIONS AND GROUPS INDEXES PAGE
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HU1-1-2
SECTIONS AND GROUPS INDEXES WX90
15501 9-35990
SECTION 8 - ELECTRICAL SYSTEM
Group 1 - SAFETY RULES ......................................................................................... ES8-1-1
Group 2 - SPECIFICATIONS AND DATA ................................................................... ES8-2-1
Group 3 - LOCATION AND FUNCTIONS OF COMPONENTS................................... ES8-3-1
Group 4 - ARRANGEMENTS AND OPERATION ....................................................... ES8-4-1
Group 5 - ELECTRICAL SYSTEM GENERALITIES ................................................... ES8-5-1
Group 6 - ELECTRIC COMPONENTS ........................................................................ ES8-6-1
SECTION 9 - TROUBLESHOOTING
Group 1 - INTRODUCTION ..........................................................................................TS9-1-1
Group 2 - HYDRAULIC SYSTEM TROUBLESHOOTING............................................ TS9-2-1
Group 3 - ELECTRICAL SYSTEM TROUBLESHOOTING .......................................... TS9-3-1
SECTION 10 - OPERATIONAL PERFORMANCE TEST
Group 1 - INTRODUCTION ........................................................................................... PT10-1
Group 2 - PERFORMANCE STANDARD...................................................................... PT10-2
Group 3 - PREPARATION FOR PERFORMANCE TEST ............................................. PT10-3
Group 4 - EXCAVATOR PEFORMANCE TEST............................................................ PT10-4
Group 5 - COMPONENTS PERFORMANCE TEST ..................................................... PT10-5
SECTION 11 - ENGINE
Group 10 - GENERAL INFORMATION ...................................................................... EM11-10
Group 11 - SPECIFICATION ...................................................................................... EM11-11
Group 12 - CYLINDER HEAD ASSEMBLY ................................................................ EM11-12
Group 13 - PISTON AND CONNECTION ROD ......................................................... EM11-13
Group 14 - CRANKSHAFT ......................................................................................... EM11-14
Group 15 - TIMING CASE COVER AND DRIVE........................................................ EM11-15
Group 16 - GENERAL DESCRIPTION....................................................................... EM11-16
Group 17 - ENGINE TIMING ...................................................................................... EM11-17
Group 19 - LUBRICATION SYSTEM ......................................................................... EM11-19
Group 20 - FUEL SYSTEM ........................................................................................ EM11-20
Group 21 - COOLING SYSTEM ................................................................................. EM11-21
Group 22 - FLYWHELL AND HOUSING .................................................................... EM11-22
Group 23A - ELECTRICAL EQUIPMENT ................................................................EM11-23A
Group 23B - ELECTRICAL EQUIPMENT ................................................................EM11-23B
Group 23C - ELECTRICAL EQUIPMENT ............................................................... EM11-23C
Group 25 - AUXILIARY EQUIPMENT ........................................................................ EM11-25
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HU1-2-1
INTRODUCTION WX90
15501 9-35990
2. INTRODUCTION
2.1 INTRODUCTION
This service manual has been prepared in order to increase repair quality, providing to the technicians the
elements for a good knowledge of the product and showing the proper procedures to carry out the
maintenance operations. We recommend to thoroughly read the content and follow it when necessary.
It is a concise guide for a specific machine. It covers construction features, operation principle, troubleshooting,
disassembly and assembly of components and repair action.
Using this manual in systematic and rational way it is possible to reduce the repairing errors and delay that
could cause machine stop with a detriment of cost management.
The information quoted in this service manual are supplied also to be used for training aids. Therefore it is
advisable to be used in the training of new personnel that will be employed in the machine maintenance.
All the information, illustrations and specifications contained in this service manual are based on the latest
product information available at the time of publication.
CASE reserves the right to makes changes at any time without notice to this service manual for technical or
trading reasons.
2.2 MANUAL HANDLING
2.2.1 CHANGES AND SUPPLEMENTS
This service manual is carried out in loose-leaf and therefore can be easily kept up-to-date.
The personnel in charge is responsible for updating the manual and will insert the changes or supplements
that CASE will issue to its service organisation.
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HU1-2-2
INTRODUCTION WX90
15501 9-35990
2.3 SYMBOLS AND INDICATIONS
In this service manual, symbols and indications are used to draw the attention on important points for safety
and quality.
2.3.1 SAFETY
This safety symbol is used for important safety message. When you see this symbol, be alert to the
potential for personal injury. Strictly follow the recommended precautions.
2.3.2 INDICATIONS
Reading this service manual you can find indications as “IMPORTANT” or “NOTE” that have the following
meaning:
•IMPORTANT
Indicates a situation which, if not avoided, could caused damages to the machine.
•NOTE
Indicates supplementary technical information or know-how.
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HU1-3-1
FEATURES OF THE MANUAL WX90
15501 9-35990
3. FEATURES OF THE MANUAL
3.1 MANUAL COMPOSITION
This service manual is divided into eleven Sections. The Section names and its contents are as below. To
fully use this service manual it is essential to understand how it is organised. Therefore, in order to speed up
the searching of wished subject, it is advisable to carefully read this chapter.
SECTION 1 - HOW TO USE
Begin to read first this Section to know the manual composition. This will help you for subject
searching.
SECTION 2 - SAFETY RULES
Indication on how to avoid dangerous situation during the use and maintenance are given in this
Section. Furthermore safety decals and relate indications used on the machine are listed on this
Section.
SECTION 3 - SPECIFICATION
This Section quotes the specification and data of the machine.
SECTION 4 - SUPERSTRUCTURE
This Section contains the information relate to operation principle of the systems, of the
assemblies and their components located on the machine upper frame. Furthermore the
assembly/disassembly procedures of main devices are quoted.
SECTION 5 - UNDERCARRIAGE
This Section contains the information relate to operation principle of the systems, of the
assemblies and their components located on the machine lower frame. Furthermore the
assembly/disassembly procedures of main devices are quoted.(axles, transmission, travels
motor, etc..).

HU1-3-2
FEATURES OF THE MANUAL WX90
15501 9-35990
SECTION 6 - FRONT-END ATTACHMENT
This Section describes the front-end attachment and its components and maintenance rules with
related disassembly/assembly.
SECTION 7 - HYDRAULIC SYSTEM
This Section describes the operation of the machine from hydraulic point of view.
SECTION 8 - ELECTRICAL SYSTEM
This Section describes the electric system of the machine, the main electrical component and
the connection with the electrical users.
SECTION 9 - TROUBLESHOOTING
IIn this Section information is provided for troubleshooting to the hydraulic and electric systems
and the necessary instruction to use the support equipment (test harnesses and test device).
SECTION 10 - OPERATIONAL PERFORMANCE TEST
Performance data and the procedures to detect data are provided in this Section.
SECTION 11 - ENGINE
This Section contains the necessary information for engine overhaul and repair.

HU1-3-3
FEATURES OF THE MANUAL WX90
15501 9-35990
3.2 BRIEF INFORMATION FOR MANUAL CONSULTATION
The manual is divided into section, each of them quotes a specific portion of the machine or specific related
subject.
Some section (those related to main mechanical assembly) are divided into:
••
••
•Operation principle O/P (Operation Principle)
••
••
•Disassembly and assembly D/A (Disassembly/Assembly)
In the Operation Principle, the assemblies and their components are described with technical data.
In the disassembly and assembly the procedures are described to perform repair or overhaul, with special tool
required and technical data.
Each section is divided into group, and the group, in turn, in pages. Each page has a number, located in the
upper right corner. Each number contains the following information;
•example:
SR 3 - 2 - 1
Consecutive page number for each group.
Group number.
Section number.
Section or Group abbreviation.
▼▼▼▼

HU1-3-4
FEATURES OF THE MANUAL WX90
15501 9-35990
NOTES:

15501 9-35990
SECTION 2 SAFETY RULES
INDEX WX90 - 2 - 1
WX90
INDEX
Group 1 - INFORMATION SECTION ............................................................................. SR2-1-1
Generalities
Starting
Operating
Stopping
Group 1 - Maintenance ................................................................................................. SR2-1-5
Generalities
Transfers and transportation
Engine
Electrical system
Hydraulic system
Tools
Removing twin wheels
Group 2 - SAFETY RULES ............................................................................................ SR2-2-1
Group 3 - SAFETY DECALS ......................................................................................... SR2-3-1

15501 9-35990

SAFETY PRECAUTIONS
SR2-1-1
15501 9-35990
GENERALITIES
Read the Operator's Manual carefully before starting,
operating, maintaining, fuelling or servicing the machine.
Carefully read the explanation to each and all safety
signs in the special section of this Manual before
starting, operating, maintaining, fuelling or servicing
the machine.
Machine-mounted safety plates are colour coded
yellow with black borders when they refer to points
where special ATTENTION must be paid and failure
to observe them may cause a serious DANGER to the
integrity of machine operators. They are white with
red borders and black lettering when they refer to a
FORBIDDEN practice.
It is fundamental that all machine operators know very
well the meaning of each safety plate as this
considerably decreases operating hazards and
accidents.
Do not allow unauthorised personnel to operate or
service this machine.
Do not wear rings, wrist watches, jewellery, loose or
hanging garments, such as ties, torn clothing,
scarves, unbuttoned or unzipped jackets that can get
caught in moving parts. Wear certified safety clothes
such as: hard hat, no-slip footwear, heavy gloves, ear
protection, safety glasses , reflector vests, respirators
every time the job requires it. Ask your employer
about safety regulations in force and protective
equipment.
Always keep the operator’s compartment, step plates,
grab-rails and handles clean and clear of foreign
objects, oil, grease, mud or snow to minimise the
danger of slipping or stumbling. Remove mud or
grease from your shoes before operating the
machine.
Do not jump on or off the machine. Always keep both
hands and one foot, or both feet and one hand in
contact with steps and/or grab rails.
Do not use controls or hoses as hand holds. Hoses
and controls are movable parts and do not provide
solid support. Besides, controls may be inadvertently
moved and cause unexpected movement of the
machine or its attachments.
Never operate the machine or its attachments from
any position other than sitting in the driver’s seat.
Keep head, body, limbs, hands and feet inside the
operator’s compartment at all times to reduce
exposure to external hazards.
Be careful of possible slippery conditions of the steps
and hand rails as well as of the ground around the
machine. Wear protective boots or shoes with the
soles made of highly no-slip rubber.
Do not leave the machine until it has come to a
complete stop.
Always check height, width and weight limitations
which may be encountered in the working site and
ensure the machine does not exceed them.
Assess exact paths of gas ducts, water mains,
telephone lines, sewers, overhead and underground
electric lines and all other possible obstacles.
Such paths should be opportunely defined by
competent Authorities. If necessary, require that the
service is interrupted or said installations are moved
prior to starting the work.
You must know the working capacity of the machine.
Define the rear upperstructure swing area and provide
for opportune barriers to prevent access into it.
Never exceed machine lifting capacity.
Remain within the limits shown in the loading capacity
chart located on the machine.
STARTING
Never start or operate a failed machine. Walk all
around the machine before mounting.
Before operating the machine, make sure that any
possible dangerous condition has been properly
removed. Before starting machine, check that steering
and attachment controls are in the neutral position
and the safety lever is in the LOCK position.
Immediately report any malfunction of parts or
systems to the maintenance managers for proper
action.
Prior to starting the engine, check, adjust and lock the
driver’s seat for maximum riding comfort and control
accessibility. Prior to operating the machine and/or its
attachments, check that bystanders are outside the
machine operating range. Sound the horn.
Obey all hand signals, safety indications and signs.
Due to the presence of flammable fluids, never check
fuel level, refuel, charge the batteries or use the
starting fluid in the presence of smoking materials,
open flames or sparks.
Ensure that nobody is within the excavator operating
area before starting the machine, swinging the upper
structure or moving in any direction.
Adjust all rear-view mirrors for maximum visibility of
the area behind the machine.
Ensure that engine speed is appropriate to the job to
be carried out.
If any hydraulic control or system exhibits erratic
performance or responds abnormally, have the
machine checked for air in the system.
Air in these circuits may cause incorrect movements
with consequent accident hazard. Refer to the
Operator's Manual about corrective action to be taken.
OPERATING
Do not run the engine of this machine in closed
buildings without proper ventilation capable to remove

SAFETY PRECAUTIONS
SR2-1-2
15501 9-35990
harmful exhaust gases which concentrate in the air.
Keep the operator’s compartment free of foreign
objects, especially if not firmly secured. Never use the
machine to transport objects, unless proper securing
points are provided.
Do not carry riders on the machine.
Study and familiarise with escape routes alternative to
normal exit routes.
For your personal safety, do not climb on or off the
machine while it is in motion.
Make sure that bystanders are clear of the machine
operating range before starting the engine and
operating the attachment. Sound the horn.
Obey all hand signals, safety indications and signs.
When backing, always look to where the machine is
to be moved. Be alert of the position of bystanders.
Should someone enter the work area, stop the
machine.
Maintain a safe distance from other machines or
obstacles to ensure required visibility conditions.
Always give way to loaded machines.
Maintain a clear vision of the surroundings of the
travel or work area at all times.
Keep cab windows clean and repaired.
When pulling loads or towing through a cable or
chain, do not start suddenly at full throttle. Take-up
slack carefully.
Avoid kinking or twisting chains or cables.
Carefully inspect cables or chains for flaws or
problems before proceeding.
Do not pull through a kinked chain or cable as the
high anomalous stresses existing in this condition
may induce failures in the kinked portion.
Always wear heavy gloves when handling chains or
cables.
Chains and cables should be securely anchored using
suitable hooks. Anchor points should be strong
enough to withstand the expected load.
Keep everyone clear of anchor points and cables or
chains. Do not pull or tow unless the operator’s
compartments of the machines involved are
properly protected against possible backlash in
case of cable or chain failure or detachment.
Be alert of soft ground conditions close to newly
constructed walls. The fill material and machine
weight may cause the wall to collapse under the
machine.
In darkness, check area of operation carefully before
moving in with the machine. Use all lights provided.
Do not move into low visibility areas.
If the engine tends to slow down and stall for
whatever reason under load or at idle, immediately
report this problem to the maintenance managers for
proper action. Do not operate the machine until this
condition is corrected.
Regularly check all exhaust system components, as
exhaust fumes are toxic for the operator.
Operators must know the performance of the
machine they are driving.
When working on slopes or near sudden level drops
in the terrain, pay attention not to lose adherence and
avoid loose soft ground since overturn or loss of
machine control could result.
If noise level is high and exceeds 90 dB(A) over 8
hours at the operator’s ear, wear approved ear
protection in compliance with local regulations.
Do not operate the machine if you are extremely tired
or feel ill.
Be especially careful towards the end of the working
shift.
Where removable counterweights are provided, do
not operate the machine if they have been removed.
When operating the machine, keep in mind height
limits of overhead doors, arches, overhead cables
and lines as well as width limits of corridors, roads
and narrow passages. Also, get to know load limits of
the ground and paving type of the ramps you are to
work on.
Beware of fog, smoke or dust that obscure visibility.
Always inspect the working area to identify potential
risks such as: inclines, overhangs, trees, demolition
rubble, fires, ravines, steep slopes, rough terrain,
ditches, crowns, ridge trenches, diggings in traffic
areas, crowded parking lots, crowded service areas,
fenced zones. In such conditions, proceed with
extreme care.
Whenever possible, avoid crossing over obstacles
such as very rough terrain, rocks, logs, steps, ditches,
railroad tracks. When obstructions must be crossed,
do so with extreme care and at a square angle, if
possible. Slow down. Ease up to the break-over point,
pass the balance point slowly and ease down the
other side also using the attachment, if necessary.
To overcome deep trenches or sinking ground, place
the machine perpendicular to the obstacle, drastically
reduce ground speed and start crossing using also
the attachment if necessary, only after assessing that
ground conditions allow the traverse safely and
without risks.
The gradient you may attempt to overcome is limited
by factors such as ground conditions, load being
handled, machine type and speed, and visibility.
There is no substitute for good judgement and
experience when working on slopes.
Avoid operating the attachment too close to an
overhang or high wall, either above or below the
machine. Beware of caving edges, falling objects and
landslides. Remember that such hazards are likely to
be concealed by bushes, undergrowth and such.
Avoid faggots, bushes, logs and rocks. Never drive
over them, nor over any other surface irregularities
that discontinue adherence or traction with the
ground, especially near slopes or drop-offs.
Be alert to avoid changes in adherence conditions
that could cause loss of control. Work with extreme
care on ice or frozen ground and on stepped slopes

SAFETY PRECAUTIONS
SR2-1-3
15501 9-35990
or near drop-offs.
The word “bulldozing” generally refers to work in
virgin rough terrain, characterised by the presence of
all the perils and risks listed above. We emphasise
the danger represented in these conditions by large
tree limbs (possibly falling on the machine) and large
roots (which may act as a leverage under the
machine when up-rooted and cause the unit to
overturn).
Position the machine dependent upon the loading
and unloading areas in order to swing leftwards to
load to obtain best visibility.
Never use the bucket or attachment as a man lift
or carry riders.
Never use the machine as a work platform or
scaffolding. The machine must not be improperly
used for works not consistent with its features (such
as pushing railway cars, trucks or other machines).
Always pay attention to people within the machine
operating range.
Never move or stop the bucket, other loads or the
attachment above ground personnel or truck cabs.
Ensure the truck driver is in a safe place before
loading the truck.
Load trucks from side or rear.
Use only the type of bucket recommended
considering machine type, materials to be handled,
material piling up and loading characteristics, ground
type and other typical conditions of the work to be
performed.
When travelling with a loaded bucket, keep it as
rolled-back as possible. Keep boom and dipper as
low as possible.
Ground speed should be adequate to the load and
ground conditions.
The load must always be properly arranged in the
bucket; move with extreme care when transporting
oversize loads.
Do not lift and move the bucket overhead where
persons are standing or working, nor downhill when
working on a slope as this would decrease machine
stability. Load the bucket from the uphill side.
Loads to be raised using the machine should be
exclusively hooked to the hitch specially provided.
The excavator is no lifting and transportation means,
therefore it should not be used to position loads
accurately. Should it be exceptionally used to lift and
lay building components, special caution must be
taken as follows:
– The machine should necessarily be equipped with
the special option supplied by CASE. Follow also
safety rules for the excavator used as lifting means.
– Secure the loads to be raised using cables or
chains fastened with appropriate hooking
mechanisms.
– Nobody should be allowed to remain under the
raised load or within the excavator operating range
for any reason whatever.
Never exceed specified loading capacity. Incorrect
fastening of slings or chains may cause boom/dipper
failure or failure of the lifting means with consequent
bodily injuries and even death.
Always ensure that slings and chains used for lifting
are adequate to the load and in good condition.
All loading capacities are referred to the machine
on a level surface and should be disregarded
when working on a slope.
Avoid travelling across slopes. Proceed from uphill
downhill and vice-versa. If machine starts slipping
sideways when on a slope, lower the bucket and
thrust bucket teeth into the ground.
Working on slopes is dangerous. Grade the working
area if possible. Reduce work cycle time if it is not
possible to grade the working area.
Do not move full bucket or a load from uphill downhill
as this would reduce machine stability. Do not work
with the bucket turned to the uphill side.
Do not work with the bucket turned uphill as
counterweights protruding downhill would reduce
machine stability on the slope and increase risk of
overturning.
We recommend to work on slopes with the bucket
downhill, after checking machine stability with the
bucket empty and attachment retracted, by slowly
swinging the upperstructure by 360°.
Position the carriage at a right angle relative to
slopes, hanging walls, etc. to exit the working area
easily.
Be aware when the upperstructure is turned by 180°,
steering and travel controls are reversed.
Properly judge ground conditions with particular
attention to consistency of the area you are going to
work on.
Keep the machine sufficiently far from the ditch edge.
Never dig under the machine.
Should it be necessary to dig under the machine,
always ensure that digging walls are opportunely
propped up against landslide to prevent the machine
from falling into the trench.
Do not swing the upperstructure, raise the load or
brake abruptly if not required. This may cause
accidents.
Prior to beginning the work near gas distribution
mains or other public utilities:
- Contact the company owner of the gas mains or its
nearest branch before starting the work. Look up
the number in the telephone directory.
- Define together which precautions should be taken
to guarantee work safety.
- Decrease work speed. Reaction time could be too
slow and distance evaluation wrong.
- When working near gas mains or other public
utilities installations, appoint a person in charge of
signalling duties. This person will have the
responsibility of observing the machine, any part of
it and/or the load approaching the gas mains from a

SAFETY PRECAUTIONS
SR2-1-4
15501 9-35990
standpoint more favourable than the Operator’s.
This signal man (flag-man) must be in direct
communication with the Operator and the Operator
must pay undivided attention to the signals
supplied.
- The gas distributing Company, if previously advised
and involved in the work, as well as machine
Operator, Owner and/or any natural person or legal
entity having rent or leased the machine or being
responsible at the time by contract or by law, are
liable for the adoption of the necessary
precautions.
Working near electric lines can be very dangerous,
therefore some special precautions must be
observed.
Within this Manual, “work near electric lines” means
when the attachment or load raised by the excavator
(in any position) may reach the minimum safety
distance established by local or international Safety
Regulations.
To work without risks, keep maximum possible
distance from electric lines and never trespass
minimum safety distance. Ensure that local or
national safety regulations concerning work near
electric lines are observed.
Prior to beginning the work near electric lines:
- Contact the Company owner of the electric lines or
its nearest branch before starting the work.
Look up the in the telephone directory.
- Define together with the Company representative
which precautions should be taken to guarantee
work safety.
- All electric lines should be considered as operative
live lines even though it might be well known that
the line in question is out of work and visibly
connected to the ground.
- The Electric Power Company, if previously advised
and involved in the work, as well as machine
Operator, Owner and/or any natural person or legal
entity having rent or leased the machine or being
responsible at the time by contract or by law, are
liable for the adoption of the necessary
precautions.
- Decrease work speed. Reaction time could be too
slow and distance evaluation wrong.
- Warn all ground personnel to keep clear of the
machine and/or load at all times. If the load has to
be guided down for laying, consult the Electric
Power Company to know which precautions should
be taken.
- Appoint a person in charge of signalling duties.
This person will have the responsibility of observing
the machine, any part of it and/or the load
approaching the electric lines from a standpoint
more favourable than the Operator’s. This signal
man (flag-man) must be in direct communication
with the Operator and the Operator must pay
undivided attention to the signals supplied.
When working in or near pits, in ditches or very high
walls, check that the walls are sufficiently propped up
to avoid cave-in hazards.
Pay the utmost attention when working near overhang
walls or where landslides may take place. Make sure
that the support surface is strong enough to prevent
landslides.
When digging, there is the risk of cave-ins and
landslides.
Always check ground conditions and conditions of the
material to be removed. Support everywhere it is
required to prevent possible cave-ins or landslides
when:
- digging near previous trenches filled with material,
- digging in bad ground conditions,
- digging trenches subject to vibration from railroads,
working machines or highway traffic.
STOPPING
When the machine is to be stopped for whatever
reason, always check that all controls are in the
neutral position and that the safety lever is on the lock
position to guarantee risk-free start-up.
Never leave the machine unattended with the engine
running.
Prior to leaving the driver’s seat, and after making
sure that all people are clear of the machine, slowly
lower the attachment until resting it safely to the
ground. Retract possible auxiliary tools to the closed
safety position.
Check that all controls are in the neutral position.
Move engine controls to the shut-down position.
Switch off the starter switch key. Consult the
Operator's Manual.
Park the machine in a non-operating and no-traffic
area. Park on firm level ground. If this is not possible,
position the machine at a right angle to the slope,
making sure there is no danger of uncontrolled
sliding.
If parking in traffic lanes cannot be avoided, provide
appropriate flags, barriers, flares and other signals as
required to adequately warn the oncoming drivers.
Always switch off the starter switch key before
cleaning, repairing or servicing, or parking the
machine to prevent accidental unauthorised start-up.
Never lower the attachment or auxiliary tools other
than from sitting in the operator’s seat. Sound the
horn. Make sure that nobody is within the machine
operating range. Lower the attachment slowly.
Securely block and lock the machine every time you
leave it unattended. Return keys to the safe place
previously agreed upon. Perform all necessary
operations for stopping as detailed in the Operation
and Maintenance Instruction Manual.
Drive the machine far from pits, trenches, rocky
hanging walls, areas with overhead electric lines, and