Troubleshooting Of Hydraulic And Mechanical System (H-Mode) - Komatsu Galeo PC800-8 Shop Manual

HYDRAULIC EXCAVATOR
PC800-8
PC800SE-8
PC800LC-8
Machine model
PC800-8
PC800SE-8
PC800LC-8
PC850-8
PC850SE-8
40 Troubleshooting
Troubleshooting of hydraulic and
mechanical system (H-mode)

Troubleshooting of hydraulic and mechanical system (H-mode) ......................................................................... 3

Before troubleshooting ................................................................................................................................... 3
Information in troubleshooting table................................................................................................................ 6
H-1 Speed or power of all work equipment, travel, and swing is low.............................................................. 8
H-2 Engine speed lowers remarkably or engine stalls.................................................................................. 10
H-3 All work equipment, travel, and swing systems do not work.................................................................. 12
H-4 Abnormal sound is heard from around pump ........................................................................................ 13
H-5 Boom speed or power is low.................................................................................................................. 14
H-6 Speed or power of arm is low ................................................................................................................ 16
H-7 Speed or power of bucket is low ............................................................................................................ 17
H-8 Boom does not move ............................................................................................................................. 18
H-9 Arm does not move................................................................................................................................ 18
H-10 Bucket does not move ......................................................................................................................... 18
H-11 Hydraulic drift of work equipment is large ............................................................................................ 19
H-12 Time lag of work equipment is large .................................................................................................... 21
PC800, 850-8
PC850-8
PC850SE-8
Serial number
50001 and up
50001 and up
50001 and up
10001 and up
10001 and up
SEN00794-02
1