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TM 9-2320-356-BD
14-9.
BOOM HOIST HYDRAULIC MOTOR AND DRUM ASSEMBLY INOPERATIVE OR DAMAGED
General Information:
The boom hoist motor and drum assembly are an integral part of the wrecker. With
either the motor or the drum damaged or inoperative, the lifting capability of the
wrecker would be minimal.
The drum and hoist motor are necessary to operate the
in-and-out movement of the hoist cable and hook.
The hook movement is one of the
most important aspects of wrecker efficiency.
Limitations:
o Degraded lifting
Personnel/Time Required:
Materials/Tools:
o 2 soldier
o Acetylene torch
o 30 to 60 minutes
o Cable clamp
Procedural Steps:
1.
Place the boom in the down position and cut the cable or wire rope to a length
that is twice the distance from the ground to the boom.
2.
Attach the cut end of the cable to boom where the cable originally is anchored
with a cable clamp or by interweaving the cables.
Refer to paragraph 14-12 or
14-13 to attach cable.
The block and hook should be hanging at about ground level.
3.
Use the boom elevating control and the crowd cylinder control to raise and
lower the hook.
4.
Record the BDAR action taken.
When the mission is completed, as soon as
practicable, repair using standard maintenance procedures.
14-10. HYDRAULIC RESERVOIR DAMAGED
General Information:
The hydraulic reservoir tank supplies fluid to the main hydraulic pump. Damage to
the hydraulic reservoir may vary,
depending on the various types and degree of
damage sustained during a combat situation.
This paragraph describes quick-fix
procedures for repair options according to the degree of damage.
Assessment Procedure:
Inspect damaged component to determine extent of damage and the repair required.
Limitations:
o Degraded mobility
14-8
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