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TM 9-2320-270-10
UNUSUAL TERRAIN - CONTINUED
Driving in Snow and Ice
Start moving by accelerating slowly with auxiliary transmission in high range and main
transmission in D position. This will help avoid spinning tires.
Drive at dower speeds.
Signal what you plan to do sooner than in normal driving.
Pump brakes to help avoid skidding and give early warning that you are going to stop.
Keep greater distance between you and the vehicle ahead.
Keep windshields, windows, mirrors, headlights, stoplights and body lights clean and clear
of snow and ice. Use HEATER-DEFROST to help keep window glass clear.
Go down medium grades in gear range normally used to climb the same grade. On steep or
very slippery grades, use at least one gear range lower.
After driving through slush or water, drive slowly and put enough pressure on service brake
pedal to cause a slight drag. When heat from dragging brakes has dried them, release brake
pedal and go back to normal speed.
Stop and inspect a difficult section of road before driving on it. Select the main trans-
mission gear best suited for the road and then continue.
If tires start spinning and forward motion stops, back up and try again. It may be necessary
to rock the M911 Truck Tractor by shifting to D range, accelerating lightly, and shifting to
reverse (R) again when forward motion stops, and then back to D range (Do not shift to re-
verse and back to drive while M911 Truck Tractor is in motion). Try not to spin tires.
Stopping on Snow and Ice
1. Ease up on accelerator with transmission in gear.
2. Apply service brakes lightly and release, apply and release, and continue while making use
of engine braking at the same time. Use trailer brakes to assist the vehicle to slow down,
stop, and prevent jackknifing when towing a semitrailer.
3. Do not brake suddenly on slick roads. This may cause the M911 Truck Tractor to skid.
Parking on Snow and Ice
1. Place boards, brush, or other material that will give traction under the tires. This will
guard against tires freezing to the ground or becoming pocketed in ice, and will give
traction when you start moving again.
2. Chock tires and put transmissions in neutral. Do not apply parking brake. The brake
shoes may freeze in the applied position.
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