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[5] CHECKING CRANE OPERATIONS
Be sure to set the outriggers by the maximum extension state by referring to " Operation 2.14
Outrigger Setting Operation" before checking the crane operations.
Be sure to refer to the Operation sections between "2.15 Cautions before Crane Operation" and
"2.23 Crane Stowing Operation", and strictly observe the methods described and cautions
given when checking crane operations.
1. Operate the winch lever (3) to "DOWN" side to leave the hook
block from the stow position.
2. Verify that the boom rises smoothly when the boom derricking
lever (4) is operated to "RAISE" side (pull toward you).
Also, verify that the boom lowers smoothly when the boom
derricking lever (4) is operated to "LOWER" side (push forward).
When doing the above, check for any abnormal sound emitted
by part of the boom or from the boom derrick cylinder.
If there is any abnormality, repair.
3. Verify that the boom extends smoothly when the boom
telescoping lever (2) is operated to "EXTEND" (push forward).
Also, verify that the boom retracts smoothly when the boom
telescoping lever (2) is operated to "RETRACT" (pull toward
you).
When doing the above, check for any abnormal sound emitted
by part of the boom or from the boom telescoping cylinder.
If there is any abnormality, repair.
4. Verify that the hook is wound down smoothly when the winch
lever (3) is operated to "DOWN" (push forward).
Also, verify that the hook is wound up smoothly when the winch
lever (3) is operated to "UP" side (pull toward you).
When doing the above, check for any abnormal sound emitted
by part of the boom or from the winch motor.
If there is any abnormality, repair.
5. Verify that the crane smoothly slews counterclockwise when the
slewing lever (1) is operated to "LEFT" side (push forward).
Also, verify that the crane smoothly slews clockwise when the
slewing lever (1) is operated to "RIGHT" side (pull toward you).
When doing the above, check for any abnormal sound emitted
nearby the post.
If there is any abnormality, repair.
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