Section III. OPERATION UNDER UNUSUAL CONDITIONS
In addition to the operating procedures described for usual conditions, special
instructions of a technical nature for operating and servicing this truck under unusual
conditions are contained or referred to herein. In addition to the normal preventive
maintenance service, special care in cleaning and lubrication must be observed where extremes
of temperature, humidity, and terrain conditions are present or anticipated. Proper cleanings,
lubrication, storage, and handling of fuels and lubricants insure proper operation and
functioning of the truck and components, and also guard against excessive wear and
It is imperative that approved practices and precautions be followed. A detailed
study of TM 21-300 and TM 21-305 is essential for use of this truck under unusual
b. Refer to TM 21-300 for instructions on driver selection, training, and supervision.
c. Refer to TM 21-305 for special driving instructions for the operation of wheeled vehicles
under unusual conditions.
d. Refer to LO 9-2320-211-12 for proper lubricants and lubricating instructions.
e. Be sure to perform the before, during, and after preventive maintenance checks and
Pay particular attention to your gages and indicators for signs of malfunction, when
operating your equipment under unusual conditions.
2-27. Extreme Cold Weather Operations.
(1) Extensive preparation is necessary for equipment scheduled for operation in extreme
cold weather. Generally, extreme cold will cause lubricants to thicken or congeal; freeze
batteries, or prevent them from furnishing sufficient current for cold weather starting; crack
insulation and cause electrical short circuits; and prevent fuel from vaporizing and properly
combining with air to form a combustible mixture for starting. Extreme cold will also cause the
various materiels or components to become hard, brittle, and easily damaged or broken.
(2) The following documents contain information pertinent to the operation of your
truck under cold weather conditions:
FM 31-70 Basic Cold Weather Manual
FM 31-71 Northern Operations
FM 31-72 Mountain Operations
TM 9-207 Operation and Maintenance of Army Materiel
in Extreme Cold Weather (0 F. to 65 F.)