Maeda MC285C-3 - Check Crane Operation

Section 5 – INSPECTION Mini-Crawler Crane M A E D A
5-28 1/2019 MC285C-3
Check Crane Operation
Review all procedures and safety precautions in
“CRANE OPERATION” on page 4-54 before
checking crane operation.
1. Set the outriggers to their maximum
extension. See “OUTRIGGER SETTING” on
page 4-38 before checking crane operation.
2. Move the winch lever (7) to DOWN to drop
the hook block from the stow position.
Fig. 5-39
3. Verify the boom rises smoothly when the
boom lift lever (8) is moved to Hoist (pull
toward you).
Fig. 5-40
5. Verify the boom lowers smoothly when the
boom lift lever is moved to Lower (push
forward).
4. Check for any abnormal sounds emitted by
the boom or from the boom cylinder. Repair
as necessary before continuing operation.
6. Verify the boom extends smoothly when the
boom telescoping lever (3) is moved to
EXTEND (push forward).
Fig. 5-41
7. Verify the boom retracts smoothly when the
boom telescoping lever is moved to
RETRACT (pull toward you).
8. Check for any abnormal sounds emitted by
the boom or from the boom telescoping
cylinder. Repair as necessary before
continuing operation.
9. Verify the hook winds down smoothly when
the winch lever is moved to DOWN (push
forward).
Fig. 5-42
10. Verify the hook is wound up smoothly when
the winch lever is moved to UP (pull toward
you).
11. Check for any abnormal sounds emitted by
the boom or winch motor. Repair as
necessary before continuing operation.
12. Verify the crane slews smoothly
counterclockwise (left) when the slewing
lever (2) is moved to Counterclockwise (left)
(push forward).
Fig. 5-43
13. Verify the crane slews smoothly clockwise
(right) when the slewing lever is moved to
Clockwise (right) (pull toward you).
14. Check for any abnormal sounds emitted from
the post. Repair as necessary before
continuing operation.