Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-25. OPERATE IN EXTREME SAND OR MUD.
Driving in mud can degrade braking and speed up brake shoe wear. If braking worsens while operating in mud, dry
brakes by driving truck and trailer approximately 500 ft (153 m) with service brakes frequently applied. This must be
done with brake drums totally out of mud so that drying action can take place. If adequate braking is not restored by
drying brakes, notify Unit Maintenance.
2-26. OPERATE IN DESERT ENVIRONMENT.
Refer to FM 90-3 for detailed instructions for living and working in desert. Principles for operating in sand or mud
(Para 2-25), apply.
2-27. OPERATE IN COLD WEATHER ENVIRONMENT.
Before operating trailer in severe cold environment, make sure it has been prepared as
described in FM 9-207. Refer to FM 31-70, FM 31-71 and FM 21-305 for additional
information on operation in cold environment. Failure to prepare trailer properly could
cause damage to equipment.
Park in shelter when possible. If shelter is not available, park so trailer does not face wind.
Place planks or brush under wheels so trailer will not freeze in place. Failure to park
properly may cause damage to trailer.
Refer to (Para 2-21) and drain air reservoirs after operation. Water in air system could
freeze and block system causing damage to equipment.
All snow and ice should be removed from trailer as soon as possible or damage to
equipment could result.
Refer to TM 9-2320-364-10, Operator's Manual for detailed operation procedures.
Drive on mud, snow, ice and slippery surfaces:
Accelerate and decelerate the towing truck gradually.
Keep towing truck speed as steady as possible after truck reaches desired speed.
Turn truck and trailer slowly when on slippery surfaces.
Steer truck and trailer away from ruts and large snow banks.
Steer truck and trailer straight up and down hills if possible.
Refer to the Operator's Manual (TM 9-2320-364-10) and select the appropriate transmission range to go
down medium grades.