TM-9-2320-272-10

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

TECHNICAL MANUAL; OPERATOR'S MANUAL

SEPTEMBER 2004

CHANGE 2

TM-9-2320-272-10 - Page 114 of 481

TM 9-2320-272-10

2-15

2-4. BODY EQUIPMENT CONTROLS AND INDICATORS

Key

Item and Function

1

DIRECTIONAL CONTROL LEVER controls rotation of rear winch drum.

Control is pulled back to UNWIND and pushed forward to WIND. Center

position is neutral.

2

TORQUE CONTROL LEVER is pushed forward to LOW for heavy winch

loads and pulled back to HIGH for light winch loads. Lever must be engaged

in HIGH or LOW before operation of directional control lever (1).

3

CABLE TENSIONER CONTROL VALVE controls tension on winch cable.

Lever is positioned up to release tension and down to apply tension.

4

BOOM CONTROL LEVER raises boom when pulled toward operator and

lowers boom when moved away from operator.

5

HOIST CONTROL LEVER raises boom hook when pulled toward operator

and lowers hook when moved away from operator.

6

CROWD CONTROL LEVER retracts boom when pulled toward operator and

extends boom when moved away from operator.

7

SWING CONTROL LEVER swings crane assembly right when pulled toward

operator and swings crane assembly left when moved away from operator.

a. Medium Wrecker.