Komatsu PC350LC-8, Operation & Maintenance Manual

Page: 266 / 502

TROUBLES AND ACTIONS
OPERATION
3-202
PHENOMENA THAT ARE NOT FAILURES 3
Note that the following phenomena are not failures:
q
When the arm control lever is operated to the IN position
and the work equipment is lowered under no load from a
high position, the arm speed will drop momentarily when
the arm is more or less at the vertical position.
q
When the bucket control lever is operated to the CURL
position and the work equipment is lowered under no load
from a high position, the bucket speed will drop momen-
tarily when the bucket teeth are more or less at the hori-
zontal position.
q
The bucket or arm will fluctuate by itself during heavy-duty
digging operations.
q
When starting or stopping the swing, noise will be emitted from the brake valve.
q
When going down a steep slope at low speed, a noise will be emitted from the travel motor brake valve.