Maeda MC285C-3 - Page 97

M A E D A Mini-Crawler Crane Section 4 – WARM-UP
1/2019 MC285C-3 4-23
3. Push in the travel lever while unlocking the
lever to enable operation of the outriggers
and the crane.
Fig. 4-60
4. Set the outriggers. See “OUTRIGGER
SETTING” on page 4-38.
5. Loosen the wire rope which has been
locking the hook block before disengaging
the hook block from its hanger. See “Before
Crane Operation” on page 4-56.
6. Pull back the accelerator lever on the crane
control side to set the engine at medium
speed (midway).
Fig. 4-61
7. Slowly operate the boom derrick lever back
and forth so that the derrick cylinder
extends and retracts to its stroke end to
check that its function is normal. If not,
correct it as necessary.
Fig. 4-62
8. Slowly operate the boom telescope cylinder
back and forth so that the boom extends or
retracts to its stroke end to check that its
function is normal. If not, correct it as
necessary.
Fig. 4-63
9. Slowly operate the winch lever back and
forth to check that the hook block is hoisted
and lowered smoothly, that it stops
immediately when the winch lever is
returned to NEUTRAL position and that the
winch does not take up the rope in a
disorderly manner. Correct any abnormality
as necessary.
Fig. 4-64
10. Slowly operate the slewing lever back and
forth to check that the crane slews
clockwise (right) and counterclockwise (left)
smoothly more than 360 degrees
respectively and that it stops immediately
when the slewing lever is returned to
NEUTRAL. Correct any abnormality as
necessary.
Fig. 4-65