TM 5-3825-229-14&P
4-68. EXTREME COLD WEATHER MAINTENANCE
CAUTION
It is very important that approved maintenance procedures be followed. FM 9-207 contains general information which is
specifically applicable to this material as well as all other material. It must be considered an essential part of this
technical manual, not merely an explanatory supplement to it.
a.
The importance of maintenance must be impressed on all concerned. Maintenance of me hanical
equipment in extreme cold is exceptionally difficult in the field. Even shop maintenance cannot be completed with
normal speed because equipment must be allowed to thaw out and warm up before the mechanic can make satisfactory
repairs. In the field, maintenance must be undertaken under the most difficult of conditions. Bare hands stick to cold
metal. Fuel in contact with the hands results in super cooling due to evaporation, and hands can be painfully frozen in a
matter of minutes. Engine oils, except subzero grade, cannot be poured at temperatures below -400F. Ordinary greases
become as solid as cold butter.
b. These difficulties increase time required to perform maintenance. At temperatures below -400F,
maintenance requires up to five times the normal amount of time. Complete winterization, diligent maintenance, and
well-trained crews are the key to efficient Arctic winter operation.
c. Refer to FM 9-207 for general information on extreme cold weather maintenance procedures.
4-69. EXTREME HOT WEATHER MAINTENANCE
a.
Refer to TB 43-0239 for specific desert maintenance instructions.
b.
Corrosion. In hot, damp climates, corrosive action will occur on all parts of the material, and will be
accelerated during rainy seasons. Evidence will appear in the form of rust, paint blisters, mildew, mold and
fungus growth.
c. Protective Action. Remove the corrosion from exterior metal surfaces with abrasive paper or cloth and apply
a protective coating of paint or touch up existing paint. Keep a film of preservative oil on unfinished exposed
metal surfaces. Cables and terminals should be protected by spraying with ignition insulation compound.
4-70. MAINTENANCE AFTER FORDING
a.
General. Although material unit housings are sealed to prevent the free flow of water into the housings, it
must be realized that due to the necessary design of these assemblies, some water may enter, especially
during submersion. The following services should be accomplished on all material which has been exposed
to some depth of water or completely submerged, especially in salt water. Precautions should be taken as
soon as practical to halt deterioration and avoid damage before the material is driven extensively in regular
service.
b.
Lubricate. Clean and lubricate all parts as specified on the lubrication chart. Remove wheels; clean and
lubricate bearings. Make sure that lubricant is generously forced into each lubrication fitting to force out any
water present.
c.
Electrical Connections. Check all electrical connections for corrosion.
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