Troubleshooting
Safety, Operation and Maintenance Manual - Aug 2012
6-12
SY115C9/135C/155H Crawler Hydraulic Excavator
●
When the bucket tips are nearly parallel
to the ground, the bucket speed may drop
suddenly.
●
The brake valve produces noise when
starting or stopping swinging operation.
●
The travel motor produces noise when the
machine travels downhill at low speed.
6.2 Pseudo Failures
Note that the following failures are pseudo
ones:
●
The arm speed may drop suddenly when
retracting the arm with the work equipment
lowering unloaded and the arm in a nearly
vertical position.
CZ335-1103213
CZ335-1103214
Fig. 6-5
Fig. 6-6