PUTTING YOUR TRUCK IN MOTION

TM 9-2320-273-10

PUTTING YOUR TRUCK IN MOTION

a. Check gages to ensure that the truck is ready for operation:

Engine oil pressure is at least 5-20 psi at Iow idle speed; a cold engine will read

higher.

Water temperature is 165F - 195F.

Air pressure is 90- 120 psi. At pressures below 60 psi the brakes will not release.

The transmission air charging valve cannot be charged at pressures below 80 psi.

The low air pressure warning light and buzzer should go off.

Voltmeter should indicate normal (green area on the dial).

Fuel gage should indicate that there is sufficient fuel for the intended mission.

Transmission oil temperature gage reads 40 F to 220F.

b. Turn on lights, as appropriate, for existing conditions.

c. Depress the transmission Air Control Button. The button will lock in the depressed

position as long as truck air pressure is 80 psi or higher. It may be necessary to shift

through all gears at engine idle speed several times to eliminate transmission air leaks,

particularly in cold weather.

Use of the inhibitor override when the truck is in motion

is prohibited. The shift inhibitor override should only be

used when the vehicle is at a complete stop.

d. Select the starting gear ratio using the following as a guide. Pull up on the selector

lever to override the inhibitor. Suggested starting gears-level hard surfaces:

Empty to 75,000 Ibs GCVW, 6th gear.

75,000 to 105,000 Ibs GCVW, 4th gear.

105,000 to 130,000 Ibs GCVW, 3rd gear.

Never let your truck coast in neutral. Severe transmission

damage can result and engine braking action is not

available during a neutral coast.

e. RELEASE PARKING BRAKE by pushing in on parking brake control.

f. TO MOVE TRUCK FORWARD, GRADUALLY DEPRESS ACCELERATOR PEDAL.

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