this is done, one man should tap the new cable into
e. .Cable
Adjustment
and
Replacement.
place with a soft hammer.
Adjustment and replacement procedures for cables are
described below.
(1) Replacement of load cables. To replace
either the front or the rear drum load cable, place the
drum brake for the cable to be removed in the brake
released position. Refer to paragraph 3-28(c) and
remove the hook block.
Raise the boom to any
convenient height so that the line hangs downward. One
man can now pull the cable off the drum. When the
cable end is reached, refer to figure 2-11 and remove the
cable wedge from the figure 2-11 and remove the cable
wedge from the drum lagging. To install the new cable,
place the new cable reel beneath the boom point
sheaves. Run the end of the new cable over the boom
point sheaves to the correct main drum. Refer to figure
rear drum, or beneath the front drum. Being careful,
slowly spool the new cable on the selected drum, using
the proper drum clutch lever. As this is done, one man
should tap the new cable into place on the drum with a
soft hammer. A second man should maintain some drag
on the new cable reel so the cable is under tension. A
third man operates the proper drum clutch lever to wind
the cable on the drum.
(2) Replacement of boom hoist cable.
Provide adequate wooden blocking to support the boom.
Lower the boom until it is supported on blocking as
illustrated, in figure 2-4. Pay off more cable until the
upper spreader lies on the boom. Refer to figure 3-17
and disconnect the boom hoist cable from the lower
Figure 3-17.
Boom hoist cable lower spreader
spreader. Refer to figure 2-32 and release the boom
connection removal and replacement.
hoist pawl and the boom hoist brake. Unreeve the boom
hoist line and pull it from the boom hoist drum. The
f. Clamshell and Dragline Bucket Service and
boom hoist drum can be used to pay the line off the drum
Replacement.
The operator/crew personnel must
under power if the operator desires. When this is done,
service and replace the buckets as described below:
one man standing on the ground must pull the cable out
(1) Service.
The bucket must be kept
of the cab. Refer to figure 2-11 and remove the cable
clean. Keep wear points lubricated in accordance with
wedge to complete removal of the cable. Bring the cable
the current LO.
reel containing the new cable to a position close to the
(2) Replacement. Bucket teeth must be
upper spreader and near the boom. Starting at the
replaced when they reach one third of their original
center (equalizer) sheave of the upper spreader, reeve
length. Dragline teeth can be reversed, top for bottom,
the, boom hoist cable back to the dead end on the lower
to equalize wear and keep them sharp during operation.
spreader as shown in figure 3-17. Pull the rest of the
Refer to figure 3-18 and replace bucket teeth.
cable off the new cable reel and reeve the other half of
the boom hoist cable, back to the boom hoist drum, as
shown in figure 2-10. Install the new cable wedge in the
boom hoist drum as shown in figure 2-11. Being careful,
slowly spool the new cable on the boom hoist drum. As
3-19
