Maeda MC405C-3 - Check Crane Operation

Section 5 – INSPECTION Mini-Crawler Crane M A E D A
5-36 1/2019 MC405C-3
Check Crane Operation
WARNING! Be sure to set the outriggers by
the maximum extension state by referring to
"OUTRIGGER SETTING" on page 4-42 before
checking the crane operations.
Be sure to refer to the sections between
"Before Crane Operations" on page 4-62 and
"Crane Stowing Operation" on page 4-66, 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.
Fig. 5-75
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.
Fig. 5-76
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.
Fig. 5-77
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.
Fig. 5-78