Komatsu PC2000-8 BACKHOE, Operation & Maintenance Manual

Page: 287 / 504

OPERATION
MACHINE OPERATIONS AND CONTROLS
3-221
Operations Using Bucket Dropping Force
Do not use the dropping force of the machine for digging, or
use the dropping force of the bucket as s pickaxe, breaker, or
pile driver. This will drastically reduce the life of the machine.
Operations Using Bucket as Lever
Do not use the bucket to lever rocks out. If the back of the
bucket contacts the rock behind, the principle of the lever will
bring excessive force to bear on the machine or work equip-
ment, and there is danger that this may lead to breakage or
damage of the machine.
In such situations, use only the force of the arm and bucket to
carry out the digging operation. If any excessive force is
brought to bear, the safety valve in the hydraulic system auto-
matically controls the force within the specified range, and this
prevents damage to the machine.
Operations Using Machine Dropping Force
Never carry out digging operations using the dropping force of
the machine.