TM 5-3810-288-12
4) Release the drum brake, and pull the cable
from the drum. Remove the cable wedge from the cable
drum socket and free the cable.
(5) Pull the cable free of the cable drum and the
boom point sheave, and lay it out straight on the ground.
(6) Roll the cable into a coil and secure it with
wire. Label the cable for future use.
g. Unreeving the Boom Hoist Cable.
(1) Swing the revolving frame so that the boom is
over the rear of the carrier. Lower the boom to a horizontal
position, level with the car- rier.
(2) Build up cribbing under the boom as shown in
(3) Lower the boom to rest on the cribbing, and
continue to sack off on the boom hoist cable until the upper
spreader comes to rest on the boom.
(4) Unspool the boom hoist cable from the drum.
Remove the wedge from the cable drum socket, and free
the cable.
(5) Disconnect the cable deadend at the gantry
and free the cable. Refer to figure 2-13.
(6) Unreeve the boom hoist cable from the gantry
spreader and upper spreader sheaves.
(7) Lay the cable out straight on the ground.
(8) Roll the cable into a coil and secure it with
wire. Label the cable for future use.
Figure 2-13. Boom hoist line reeving.
(9) Remove the guy cables by removing the cotter
pins and pins from both ends of the cables. Refer to figure
2-12.
(10)Using a suitable lifting device, lift the upper
spreader from the crane boom.
h. Removing the Crane Boom.
(1) Unreeve the hoist line and boom hoist line.
Support the boom on cribbing as shown in figure 2-7.
(2) Use wedges or a hydraulic jack to re- lieve the
weight of the boom on the boom foot pins, and remove the
pins. Refer to figure 2-9.
(3) Disconnect the boom backstops from the
gantry A-frame and lay the backstops on the top of the
boom. Refer to figure 2-10.
(4) Drive the carrier away from the boom.
2-6. Clamshell Conversion
a. General. The truck crane may be converted
clamshell operation by installing the crane
Figure 2-14. Securing cable to drum
2-9
