M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANCE
1/2019 MC285C-3 5-69
Boom Telescope Wire Rope Adjustment
NOTICE: The wire ropes must be adjusted to the correct tightness. Adjustment of these wire ropes must
conform to the following procedure for wire rope adjustment.
WARNING! Sever Hazard. When making adjustment of each wire rope, be careful not to create
any excessive tension.
Four boom pull-out and pull-in wire ropes are in use. There is a sequence such as follows for making
adjustment of these wire ropes, which should always be observed:
1. With the boom totally retracted and positioned horizontally, extend the boom which telescopes
approximately 2 m.
Fig. 5-154
2. Retract boom slowly to stowed position. In
this position, measure the clearance ((a) and
(b)) and make following adjustment:
Fig. 5-155
• If the clearance (a) is 5 mm or greater,
adjust the no. 4 boom pull-in wire rope (5).
• If the clearance (a) is zero, make the
adjustment in accordance with Step 4.
3. Adjust no. 4 boom pull-in wire rope (5):
Fig. 5-156
a. Loosen the lock nut (9), then tighten the
right and left side adjustment nuts (10)
evenly in the direction of tightening the no.
4 boom pull-in wire rope until the
clearance (a) becomes zero.
b. After completion of Steps 1 and 2, and as
the result of measurement thereof, if the
clearance (a) of 5 mm or greater remains,
repeat the adjustment procedure.
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