TM-9-2320-361-20

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

OCTOBER 1991
TM-9-2320-361-20

  TM-9-2320-361-20 - Page 79 of 1207

TM 9-2320-361-20
1-22. SPECIAL PURPOSE BODIES SYSTEMS OPERATION (Contd)
b. Earth Boring, Polesetting, and Rear Winch Systems Operation (M764).
The rear winch and earth boring machine are mechanically driven from the engine and operate
individually through a power divider. Rear winch is used primarily with polesetting derrick to position and
install poles. The earth boring machine is used to drill select size holes to mount poles. Major components of
earth boring machine, polesetting derrick, and rear winch are:
REAR WINCH CONTROL ROD
- Connects rear winch to power divider.
REAR WINCH CONTROL
- A manually-operated control lever located inside the cab that permits
engagement and disengagement of the rear winch.
POWER-DIVIDER CONTROL LEVER
- A manually-operated control lever located inside the cab
that permits engagement and disengagement of earth boring machine and permits forward and
reverse operation of rear winch.
EARTH BORING AND REAR WINCH CONTROL ROD
- Connects earth boring machine and
rear winch control to power divider.
REAR WINCH
- Reels in or pays out cable for polesetting operations.
REAR WINCH DRIVE CHAIN
- Transmits mechanical power from power divider to rear winch.
EARTH BORING CLUTCH
- Allows smooth transfer of power and control for all operations of
earth boring machine.
EARTH BORING CLUTCH CONTROLS
- Operate drive clutch and feed clutch.
POWER LEVELER
- Positions earth boring machine and polesetting derrick using mechanical
power.
POLESETTING DERRICK
- Raises, positions, and installs poles.
EARTH BORING MACHINE
- Houses auger bit drive and polesetting derrick.
MAIN SUPPORT TUBE
- Supports operator’s seat and earth boring clutch controls.
EARTH BORING PROPELLER SHAFT
- Transmits power from power divider to earth boring
machine.
POWER DIVIDER
- Uses mechanical power of the transfer case power takeoff to drive rear winch,
earth boring machine, and outriggers.
1-66


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