1 GENERAL INFORMATION
Safety, general and torque settings .................................................................1001
Specifications (Crawler excavators).................................................................1002
Specifications (Wheeled excavators)...............................................................1002
2 ENGINE
Engine removal and installation (788 - 988 - 988 Plus ....................................2002
Engine removal and installation (788 Plus)......................................................2002 Radiator and oil cooler .....................................................................................2003
4 ELECTRICAL SYSTEM
Electrical schematic (Crawler excavators) - (before November 1999).............4001
Electrical schematic (Wheeled excavators) - (before November 1999)...........4001
Electrical schematic (Crawler excavators) - (November 1999 and after).........4001
Electrical schematic (Wheeled excavators) - (November 1999 and after).......4001
Electronic system and troubleshooting (Crawler excavators) ..........................4002
Electronic system and troubleshooting (Wheeled excavators) ........................4002
Starter motor ....................................................................................................4003
Alternator .........................................................................................................4004
Powersensor diagnostic tool ............................................................................4010
5 UNDERCARRIAGE
Track group (Crawler excavators)....................................................................5002
6 DRIVE TRAIN
Travel reduction gear and brake (Crawler excavators) ....................................6002
Swing reduction gear and brake (788 - 788 Plus)............................................6003
Swing reduction gear and brake (988).............................................................6003
Swing reduction gear and brake (988 Plus).....................................................6003
Front axle and service brake (Wheeled excavators)........................................6004
Rear axle and service brake (Wheeled excavators) ........................................6005
Gearbox and parking brake (Wheeled excavators) .........................................6008
Twin wheels (Wheeled excavators) .................................................................6020
7 UNDERCARRIAGE HYDRAULICS
Hydraulic travel motor (Mono-speed crawler excavators)................................7002
Hydraulic travel motor (Two-speed crawler excavators) ..................................7003
Hydraulic travel motor (Wheeled excavators) ..................................................7003
Travel control valve (Crawler excavators)........................................................7030
Travel, stabilizer and dozer blade control valve
(wheeled excavators) ..................................................................................7031
Steering, stabilizer, dozer blade and front axle locking cylinders
(wheeled excavators ) .................................................................................7080
8 UPPERSTRUCTURE HYDRAULICS
Hydraulic inspection, adjustment and schematics
(crawler excavators) ....................................................................................8001
Hydraulic inspection, adjustment and schematics
(wheeled excavators) ..................................................................................8001
Hydraulic swivel (Crawler excavators) .............................................................8011
Hydraulic swivel (Wheeled excavators) ...........................................................8011
Hydraulic pumps (788 - 788 Plus)....................................................................8020
Hydraulic pumps (988 - 988 Plus)....................................................................8020
Hydraulic swing pump......................................................................................8021
Attachment control valve..................................................................................8031
Swing control valve ..........................................................................................8033
Rotary control valve (Orbitrol) (Wheeled excavators) ......................................8037
Hydraulic swing motor and forced-feed safety block .......................................8040
Attachment and swing control block ...............................................................8050
Travel and option control block
(Foot pedal, Wheeled excavators)...............................................................8051
Travel hand control block (Inching, wheeled excavators) ................................8052
Direction of travel inverter control block (Inching, crawler excavators)............8053
Travel control block (788 - 788 Plus 988 - 988 Plus wheeled excavators) ......8054
Brake module (wheeled excavators)................................................................8060
Parking brake electro-control valve (wheeled excavators) ..............................8061
Electro-control valve block (Crawler excavators).............................................8070
Electro-control valve block (wheeled excavators)............................................8071
Selector block (788 Plus) .................................................................................8072
Attachment cylinders........................................................................................8080
Safety valve .....................................................................................................8081
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