Komatsu PC138US-11 Operation & Maintenance Manual page 59

Hydraulic excavator
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SAFETY
Do not swing or operate the work equipment suddenly.
There is a danger that this may cause the load to swing and the machine to become unstable or tip over.
Do not leave the operator seat when there is a raised load
Do not leave the operator seat when there is a raised load.
Do not use the work equipment or swing to pull the load in
any direction.
There is a danger that the hook may be break and the load
come off, causing the work equipment to move suddenly and
cause personal injury.
When swinging or operating the work equipment, check
carefully that the surrounding area is clear from objects,
structures or any persons working around the machine.
During the lifting operation, reduce the engine speed and
carry out the operation in L mode.
Never travel the machine while lifting the load.
If the load approaches the lifting limit of the machine, a
warning is shown on the monitor panel and an audible
alarm sounds. In this case, lower the load to the ground.
WENAM00111
PRECAUTIONS FOR OPERATION
2-39

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