Section IV. OPERATION UNDER UNUSUAL CONDITIONS
General. Special instructions for operating and maintaining vehicles under unusual conditions are included in
this section. Unusual conditions are extreme high or low temperatures, humidity, and/or terrain. Special care in cleaning
and lubrication must be taken to keep vehicles operating under unusual conditions.
Cleaning. Refer to paragraph 2-8 for cleaning instructions and precautions.
Refer to LO 9-2320-272-12 for proper lubricating instructions.
Service intervals in LO 9-2320-272-12 are for normal operating conditions. Reduce service intervals
when unusual conditions exist.
FM 21-305 contains special driving instructions for operating wheeled vehicles.
FM 9-207 contains instructions on vehicle operation in extreme cold of 0°
to -65°F (-18° to -54°C) or
below. Other documents with information on cold weather vehicle operation are:
FM 31-70 Basic Cold Weather Manual.
FM 31-71 Northern Operations.
FM 90-6 (HTF) Mountain Operations.
Reporting Materiel Failure. Report failure of vehicle, body equipment, or kits on DA form SF 368 (Quality
Deficiency Report-Equipment Improvement Recommendations) as prescribed by DA Pam 738-750 and as stated in
paragraph 1-5 of this manual.
Special Purpose Kits. Paragraphs describing special purpose kits for operation under unusual conditions
Fuel burning personnel heater kit (para. 2-44) and engine coolant heater kit (para. 2-45).
Deepwater fording kit (para. 2-40).
Hardtop kit and radiator and hood cover kit (para. 2-43).
CTIS OPERATION UNDER UNUSUAL CONDITIONS
General. This paragraph provides instructions for M939A2 CTIS operation under emergency conditions and
operation with a punctured tire.
Except where specifically noted, the controls and indicator in this section are applicable to
all M939A2 series vehicles.