Case WX90 Manuale utente
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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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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