M A E D A Crawler Crane 6.18 IRREGULAR MAINTENANCE
5/2020 CC1908S-1 6-79
10.
Operate the right-hand control lever to the
"Hoist up" or "Hoist down" side, and repeat
the raising and lowering of the hook block
several times.
11.
Roll in the winch drum in an orderly manner
with tension applied to the wire rope.
12.
Repeat the above steps until twisting of the
hook is eliminated.
Replace the wire rope with a new one if the
twisting is not corrected by the above steps.
WINCH WIRE ROPE
REPLACEMENT
WARNING
Always wear thick leather work gloves when
replacing the wire rope.
IMPORTANT
• Measure the diameter of the wire rope at
points where the wire repeatedly runs
through the sheave. A mean value needs to
be determined from measurements in three
directions. (Measurement should be taken at
several points with a space between them.)
• Do not use old wire rope even if it has not
been used.
[1] Removing winch wire rope
IMPORTANT
• After lowering the hook block to the ground,
attempting to further unwind will cause
irregular winding of the wire rope on the
winch drum.
• Do not let the hook block come into contact
with the ground by operating the winch
lever.
Use the following procedure to remove the wire
rope:
1.
Stop the machine on firm, level ground, fully
retract the boom, and set the boom angle to
approximately 20 degrees.
2.
Unwind the winch from the state in Step 1
above to unwind the hook block until it is
almost touching the ground.
3.
Bring down the hook block to the ground by
lowering the boom.
4.
Remove the wire socket retaining bolt (1), pull
off the wire socket pin (2), and remove the
wire socket (3).
5.
Remove the wire clip (4).
6.
Pull the wire rope (5) out of the wire socket (3)
as follows:
1. Place a 6 mm to 10 mm diameter round
bar (A) in contact with the rope wedge
(6).
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