Starting and Warmup (+32F).

TM 9-2320-273-10

Use of seat belts while operating your vehicle is

mandatory as an aid in preventing injury in event

of an accident.

Ride Level Adjustment. While seated, pull up on the ratchet trip lever and

operate the ratchet up and down to increase preload. Push ratchet trip lever

down and operate ratchet to decrease preload. The seat will adjust for weights

from 130 to 275 pounds. When properly adjusted, the preload indicator will

be as shown in the figure, with the tip of the indicator flush with the seat frame.

2. Backrest Angle Adjustment. Lift upon backrest and tilt forward or backward.

Lower the backrest so that it engages one of three notched positions.

3. Fore and Aft Seat Adjustment. Pull out on lever (towards door) and move seat

forward or backward to adjust for your leg length. Seat may be moved forward

or back 6 inches.

2-11. Starting and Warmup (+32F).

a. MAKE SURE YOU APPLY THE PARKING BRAKE. Pull out to set brake. Push

in to release brake.

NOTE

These trucks have a neutral safety switch which prevents

the engine from being started if the transmission is in

gear.

b. PLACE THE TRANSMISSION RATlO SELECTOR IN THE NEUTRAL (N)

POSITION.

TURN THE ENGINE RUN SWITCH TO THE ON POSITION. The low air

pressure buzzer should sound and the following warning lights should illuminate:

LOW OIL PRESSURE

LOW AIR PRESSURE

PARKING BRAKE

d. Make sure the PTO (M916 through M920) control is pushed in and the differential

lock/unlock control set to UNLOCK for the M915 and the center position for the

M916 through M920 (the DIFF LOCK OUT light will be lit if the control is in the

LOCK position).

e. Make sure that all accessories are turned off and that the engine retarder system

is disengaged.