1-2
SECTIONS INDEX
SECTION 6 - FRONT ATTACHMENT
Introduction ....................................................................................................................6-1
Cylinder removal and installation .....................................................................................6-6
Cylinders ......................................................................................................................6-24
Antidrop valve ............................................................................................................... 6-81
Pins and bushings ........................................................................................................ 6-83
Buckets ........................................................................................................................ 6-88
SECTION 7 - HYDRAULIC SYSTEM
Hoses and fittings ........................................................................................................... 7-1
Hydraulic system ............................................................................................................7-8
Operation of circuits .....................................................................................................7-50
SECTION 8 - ELECTRICAL SYSTEM
Safety precautions .........................................................................................................8-1
Features and data .......................................................................................................... 8-2
Components location and operation ................................................................................8-4
Undercarriage electric components ................................................................................ 8-6
Control units electric system ...........................................................................................8-7
Light and beams group ................................................................................................... 8-8
Gauges and controls .......................................................................................................8-9
Electric components ..................................................................................................... 8-32
Control line and wiring harnesses ................................................................................. 8-37
SECTION 9 - TROUBLESHOOTING
Introduction ....................................................................................................................9-1
Hydraulic system troubleshooting ................................................................................... 9-3
Electrical system troubleshooting .................................................................................. 9-28
SECTION 10 - PERFORMANCE TEST
Introduction .................................................................................................................. 10-1
General information for machine testing .......................................................................10-1
Standard performances ................................................................................................ 10-2
Preparation for performance test ................................................................................ 10-10
Excavator peformance test ......................................................................................... 10-12
Boom/slew performance ............................................................................................. 10-20
Gear box ..................................................................................................................... 10-25
Components performance .......................................................................................... 10-26
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