Maeda MC815C, Operation Manual, Page: 303 / 426

293
[INSTALLATION OF WINCH WIRE ROPE]
• Always wear thick leather working gloves when handling 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.
• Always hoist an object (2.9 to 4.9 kN {300 to 500 kg}) with the boom and jib extended
and raised fully immediately after attaching a new rope. Repeat winding and
unwinding the hook several times until the new rope conforms.
• 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. With the end of the wire rope held, draw the wire rope
(5) through the weight of the over hoist detector (11),
load sheave (11) at the jib end, wire guide (12) of
booms Nos. 2, 3 and 4, roller sheave (13), sheave
inside the boom derricking cylinder mounting bracket
(14) 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) The rope wedge (10) should be in position (a) .
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).
Leave about 10 m of wire rope from the boom tip.
CAUTION
To prevent irregular winding, apply a tension of
approx. 1.47 kN (150 kg) especially to the first to
third windings.