Section IV. OPERATION UNDER UNUSUAL CONDITIONS

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TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

Operation In Extreme Heat and High Humidity

TM 9-2330-380-14&P

Section IV. OPERATION UNDER UNUSUAL CONDITIONS

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2-20

General ...........................................................................................................................

2-24

2-21

Operation in Extreme Cold ...............................................................................................

2-24

2-22

OperationinExtremeHeatandHighHumidity ....................................................................

2-25

2-23

Operation in Mud and Snow .............................................................................................

2-26

2-24

Operation in Dusty or Sandy Areas ...................................................................................

2-26

2-25

Operation in Salt Water Areas ..........................................................................................

2-26

Fording ...........................................................................................................................

2-27

Operation With Air Brake Failure (Caging Brakes) .............................................................

2-28

2-20. General

a. 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 cleaning, lubrication and storage and handling of fuels and

lubricants not only ensure proper

operation and functioning, but also guard against excessive wear in the working parts and

deterioration of materials.

b. FM 55-30 contains instructions on driver selection, training and supervision. FM 21-305

prescribes special driving instructions for operating wheeled vehicles under unusual conditions.

A detailed study of these manuals is essential for the use of this material under unusual

conditions.

c. When chronic failure of the materiel results from subjection to extreme conditions, report the

condition on SF Form 368.

2-21. Operation In Extreme Cold

CAUTION

To ensure equipment is not damaged, approved practices and precautions must be followed.

a. Extensive preparation of materiels scheduled for operation in extreme cold weather is necessary.

Generally, extreme cold causes lubricants to thicken or congeal, cracks insulation, causes electrical short

circuits and various construction materials become hard, brittle and easily damaged or broken.

b. The operator must always be on the alert for indications of the effect of the cold weather on the

semitrailer.

c. Use caution when placing the vehicle in motion after a shutdown. Congealed lubricants may cause failure of

parts. Tires frozen to the ground or frozen to the shape of the flat spot while underinflated must be

considered. One or more brake shoes may be frozen fast and require preheating to avoid damage to the

towing vehicle clutch surfaces.

2-24