or impediments are close to the hydraulic equipment and honk the horn.
• The warm-up operations for hydraulic equipment are necessary not only for the pump -
cylinder circuits and pump-motor circuits but also for the operation circuits.
Perform the cylinder and motor of not only one system and in one direction but also in all
1. Perform the warm-up operations for the engine.
2. Place the lock lever (1) slowly in the free position (F).
3. See “Operation 3.15 Operations Before Crane Work” and
“Operation 3.16 Crane Operation Position” and prepare for
crane operation.
4. Turn the fuel adjustment dial (2) to position between the low
idling position (MIN) and full rotation position (MAX).
5. Slowly operate the right work equipment operation lever (3)
to the stroke end on the "Lower" side (push outside) and
after the boom completely lowers, hold the lever at that
position for 30 seconds.
At this time, operate the right work equipment operation
lever (3) to the "Wind up" side (pull backward) as necessary
so that the hook does not contact the ground.
6. Slowly operate the right work equipment operation lever (3)
to the stroke end on the "Raise" side (pull inside) and after
the boom completely rises, hold the lever at that position for
30 seconds.
At this time, operate the right work equipment operation
lever (3) to the "Wind down" side (push forward) as
necessary so that the hook is not overwound.
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