Mini-Crawler Crane M A E D A Section 4 –
OPERATIONS AND CHECKS AFTER STARTING ENGINE
1/2019 MC405C-3 4-21
6. Step on the acceleration pedal (6) to the half
of the full stroke and operate the engine at
medium speed.
Fig. 4-52
7. Operate the boom derricking lever (4) slowly
forward / backward and move the derricking
cylinder up/down until it reaches the stroke
end. Check if there is any abnormality with
the operation.
If there is any abnormality, repair.
Fig. 4-53
8. Operate the boom telescoping lever (2)
slowly forward / backward to extend/retract
the boom until it reaches the stroke end.
Check if there is any abnormality with the
operation.
If there is any abnormality, repair.
Fig. 4-54
9. Operate the winch lever (3) slowly
forward/backward to check if the hook block
is smoothly raised/lowered. Also check if the
hook block immediately stops and the winch
drum does not wind in mess when the winch
lever returns to the "Neutral" position. If
there is any abnormality, repair.
Fig. 4-55
10. Operate the slewing lever (1) slowly
forward/backward to check if the crane
smoothly slews clockwise (right) and
counterclockwise (left) for 360 degrees or
more. Also check if the crane stops
immediately when the slewing lever returns
to the "Neutral" position.
If there is any abnormality, repair.
Fig. 4-56
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