Komatsu PC400LC-5 Operation & Maintenance Manual page 241

33. EXTENDING MACHINE SERVICE LIFE
Moving the chisel while carrying out impacting operations
AE099310
Holding the chisel horizontal or pointed up when carrying out
impacting operations
Twisting the chisel when it has penetrated the rock
Pecking operations
Extending the bucket
chine off the ground
1
AE099340
cylinder fully and thrusting to raise the ma-
1
I
AE099350
5-21