Komatsu PC88MR-10 Shop Manual page 952

40 Troubleshooting
Troubleshooting of hydraulic and mechanical system (H-
mode)
Failure mode
Swing acceleration or swing speed is low
Upper structure overruns excessively when it
stops swinging
Shock is large when upper structure stops swinging
Large unusual noise is heard when upper structure stops swinging
Swing drift on a slope is large
Oil flow in attachment circuit cannot be controlled
40-464
Component causing failure
In both directions (right and
q
left)
In only one direction
(Both right and left)
(Either right or left)
q
When parking brake works
When parking brake is OFF
Travel motor
H-27
H-28
H-29
H-30
H-31
H-32
H-33
H-34
H-35
PC88MR-10