Operation
Safety, Operation and Maintenance Manual - Sep 2012
4-39
SY115C9/135C/155H Crawler Hydraulic Excavator
4.8.3 Operation when hydraulic cylin-
der reaches its stroke end
If the cylinder's piston reaches its end of
stroke, using the work equipment under ex-
ternal impact could damage hydraulic cylinder
and cause personal injury. Avoid operating the
machine when its hydraulic cylinder is fully re-
tracted or extended.
4.8.4 Operation with bucket landing
force
1. Never use the bucket's landing force for
excavating, digging, breaking or pile-driving
operation, which may otherwise reduce the
service life of the machine considerably.
2. To avoid damage of hydraulic cylinders,
never use the bucket to strike or compact
the ground while its cylinder is fully ex-
tended or retracted.
CZ335-1103183
CZ335-1103184
Fig. 4-68
Fig. 4-69