Komatsu PC400LC-5 Operation & Maintenance Manual page 240

33. EXTENDING MACHINE SERVICE LIFE
When applying continuous impact to the same impact surface, if the
1
,, , ,
II I/
chisel does not penetrate or break the surface within 1 minute,
change the point of impact and carry out breaking operations closer
to the edge.
The direction of penetration
of the chisel and the direction of the
breaker body will gradually move
out of line with each other, so
always adjust the bucket cylinder
to keep them aligned.
Always keep the chisel pressed against the impact surface properly
to prevent using the impact force when there is no resistance.
MISTAKEN METHODS OF USE
To ensure that the machine has a long life, and to ensure that
operations are carried out in safety, do not operate the machine in
any of the following ways.
l Do not operate the cylinder to the end of its stroke.
Always leave approx. 5 cm (2 in) to spare.
Using the mount to gather in pieces of rock
Operations using the swing force
AE099270
AE099290
AE099300
5-20