Maeda MC285C-3 - Page 286

Section 5 – GENERAL MACHINE MAINTENANCE Mini-Crawler Crane M A E D A
5-70 1/2019 MC285C-3
4. Adjust no. 4 boom pull-out wire rope (6):
Fig. 5-157
a. Loosen the lock nuts (11), then tighten the
right and left side adjustment nuts (12)
evenly in the direction wherein the no. 4
boom pull-out wire rope (6) is tightened, to
the point immediately before the no. 4
boom starts to be extended.
b. Retighten both right and left adjustment
nuts (10) for the no. 4 boom pull-in wire
rope (5) further by one more turn.
c. Lock the adjustment nuts (10) and (12) for
no. 4 boom pull-in and pull-out wire ropes
(5) and (6), with respective lock nuts (9)
and (11).
d. After completion of Steps a and b, and as
the result of measurement thereof, if the
clearance (b) of 5 mm or greater remains,
make the adjustment in accordance with
Step 5. If the clearance (b) is zero, make
the adjustment in accordance with Step 6.
Fig. 5-158
5. Adjust no. 5 boom pull-in wire rope (7):
Fig. 5-159
a. Loosen the lock nut (13), then tighten the
right and left side adjustment nuts (14) evenly
in the direction of tightening the no. 5 boom
pull-in wire rope (7) until the clearance (b)
becomes zero.
b. After completion of Steps a and b, and as the
result of measurement thereof, if the
clearance (b) of 5 mm or greater remains,
repeat the adjustment procedure.
6. Adjust no. 5 boom pull-out wire rope (8):
Fig. 5-160
a. Loosen the lock nut (15), then tighten the
right and left side adjustment nuts (16)
evenly in the direction wherein the no. 5
boom pull-out wire rope (8) is tightened, to
the point immediately before the no. 5
boom starts to be extended.
b. Retighten both right and left adjustment
nuts (14) for the no. 5 boom pull-in wire
rope (7) further by one more turn.
c. Lock the adjustment nuts (14) and (16), for no.
5 boom pull-in and pull-out wire ropes (7) and
(8) with respective lock nuts (13) and (15).