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 104 of 481

TM 9-2320-272-10

2-5

Key

Item and Function

12

(a) DUMP BODY CONTROL LEVER (M929/A1/A2 and M930/A1/A2 models) is

pushed back to raise dump body and pulled forward to lower dump body.

(b) TRANSFER CASE POWER TAKEOFF CONTROL LEVER (M936/A1/A2

models) is engaged to provide power to crane and rear winch.

13

SAFETY LATCH secures dump body control in neutral when not in use.

14

MECHANICAL PARKING BRAKE CONTROL LEVER is pulled up to engage

parking brakes and down to disengage brakes. Knob on top of handle is turned

clockwise to increase parking brake tension and counterclockwise to decrease

parking brake tension. When parking brake lever is applied, it also trips a valve

to release air pressure from spring brakes. This engages spring brakes.

15

TRANSFER CASE SHIFT LEVER is pushed down to high range for light load

operations and up to low range for heavy load operations. Six-wheel drive is

achieved automatically when transfer case shift lever is placed in low range.

16

ACCELERATOR PEDAL controls engine speed.

17

BRAKE PEDAL is depressed to stop vehicle.

18

DIMMER SWITCH is depressed to raise or lower headlight beam.

19

COWL VENTILATOR (one on each side of cab) is opened manually to

provide fresh air ventilation.

20

ACCESS DOOR opens to provide access to transmission dipstick and oil fill

(M939/A1 series vehicles).

21

TRANSMISSION DIPSTICK is turned counterclockwise to remove and

check transmission oil level, (M939/A1 series vehicles).

2-3. CHASSIS CONTROLS AND INDICATORS (Contd)