Maeda MC305C-3 - Winch Wire Rope - Correcting Twisted Rope

M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANSE
3/2019 MC305C-3 5-67
• Reduction from normal diameter of more than
the following:
0.4mm for diameters up to and inching 8.0mm.
Fig. 5-137
Winch Wire Rope - Correcting Twisted
Rope
WARNING! Be sure to wear a pair of thick
leather working gloves when handling wire
ropes.
CAUTION: Change the hooking direction of
the wire rope (inverse the hook block side and
winch drum side) from time to time to extend
the life of the wire rope.
When the wire rope gets twisted, straighten the
twist with the following procedure.
1. With the hook in normal condition, check the
twisting direction and how many times the
rope is twisted.
Fig. 5-138
2. Move the winch lever to LOWER (push
forward) to lower the hook block until just
before it makes contact with the ground.
Lower the hook block by either moving the
boom lifting lever to LOWER (push forward)
to lower the boom or by moving the boom
telescoping lever to RETRACT (pull toward
you) to retract the boom.
3. Turn the starter switch to the "OFF" position
to stop the engine.
Fig. 5-139
4. Remove the wedge socket pin securing bolt
(1) to remove the wedge socket (2).
Fig. 5-140
5. Force to twist the end of the wire for "n"
(number of wire falls) times of the number
hook is twisted for in the opposite direction
from the direction the hook block is twisted to
and which you checked in the step 1
(opposite direction from the one the wire rope
tries to go back to naturally when you release
your hand from the wedge socket) and install
the wire rope.
Fig. 5-141
6. Start the engine and operate the boom
derricking lever to the "RAISE" (pull toward
you) side to increase the boom angle to its
maximum.
7. Operate the boom telescoping lever to the
"EXTEND" (push forward) side to extend the
boom to its maximum.
8. Operate the winch lever to repeat
raising/lowering the hook block for several
times.