TM-9-2320-272-24-3

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4

JUNE 1998
TM-9-2320-272-24-3

  TM-9-2320-272-24-3 - Page 644 of 799

4-192. HOIST
TM 9-2320-272-24-3
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODEl.S
REFERENCES (TM)
M936/A1/A2
LO 9-2320-272-12
TOOLS
TM 9-2320-272-10
General mechanic’s tool kit (Appendix E, Item 1)
Lifting device
Chain
TM 9-2320-272-24P
EQUIPMENT CONDITION
• Parking brake set (TM 9-2320-272-10).
• Boom floodlight wire removed (para. 3-385).
• Hoist winch cable removed (para. 3-384).
• Hydraulic hoist winch motor and lines removed
MATERIAL/PARTS
Twelve lockwashers (Appendix D, Item 393)
PERSONNEL REQUIRED
Two
(para. 4-190).
• Hoist level wind removed (para. 4-191).
GENERAL SAFETY INSTRUCTIONS
All personnel must stand clear during hoisting
operations.
WARNING
All personnel must stand clear during hoisting operations. A snapped
cable, or a shifting or swinging load, may cause injury to personnel.
NOTE
Have drainage container ready to catch oil.
1.
Remove drainplug (5) from bottom of hoist winch (4).
2.
Install drainplug (5) in hoist winch (4) when oil drainage is completed.
3.
Attach utility chain to hoist winch (4).
4.
Attach utility chain to lifting device and remove slack from utility chain.
NOTE
Assistant will help with step 5.
5.
Remove twelve screws (3) and lockwashers (2) from boom (1) and hoist winch (4). Discard
lockwashers (2).
6.
Carefully lower hoist winch (4) to wrecker bed.
7.
Remove utility chain from hoist winch (4).
NOTE
Assistant will help with steps 1, 2, and 3.
1.
Attach utility chain to hoist winch (4).
2.
Attach of lifting device to utility chain and lift hoist winch (4) into position on boom (1).
3.
Align screw holes in hoist winch (4) with screw holes in boom (1) and install hoist winch (4) on boom
(1) with twelve new lockwashers (2) and screws (3).
4.
Release lifting device hook from utility chain and remove utility chain from hoist winch (4).
4-908


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