7-10
3.2 INSTALLATION OF WINCH WIRE ROPE
• Always put on thick leather work gloves when replacing the wire rope.
• Be sure to attach the rope wedge properly to secure the wire rope. Serious accidents may occur if the
wire rope is detached during crane operations.
CAUTION
• Avoid irregular winding of the wire rope on the winch drum.
• Immediately after attaching a new rope, and with the boom fully extended and raised, hoist an object
(2.9 to 4.9 KN [300 to 500 kg]) and repeatedly raise and lower the hook until the new rope has been
broken in.
• The wire rope is coiled. Exercise caution not to form a kink in the rope when winding it up. Be sure to
unravel by rotating the rope to pull it out of the winch drum.
Use the following procedure to attach the wire rope.
1. Hold the wire rope and pass the wire rope (5) through the weight of
over-winding prevention unit, load sheave (11) at the end of load
sheave (11), wire guide (12) of boom Nos. 2, 3 and 4, roller sheave
(13), sheave (14) inside the boom derricking cylinder mounting
bracket, and slide sheave (15).
2. Draw the wire rope (5) through the rope attachment hole of the winch
drum (9). Secure the wire rope (5) to the winch drum (9), following the
procedure provided below.
(1) Draw the slackened wire rope (5) through the winch drum (9).
(2) Put the rope wedge (10) in position (a) and pass the wire rope (5)
around the rope wedge and yank at the rope in the direction
indicated by the arrow.
Adjust the length of the wire rope (5) to keep the end of the wire
rope from protruding from the narrow hole in the winch drum (9).
3. Operate the right operation lever to "UP" (push it toward you) to wind
up the wire rope (5) on to the winch drum (9).
At this moment, leave the wire rope for about 10 meters unwounded
ahead of the boom edge.
CAUTION
To prevent irregular winding, apply a tension force of
approximately 1.47 kN (150 kg) particularly to the layers 1, 2 and 3
during the winding.
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