TM 9-2350-238-10Section IV.MAINTENANCE UNDER UNUSUAL CONDITIONSSECTION INDEXPageAFTER FORDING MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3-56EXTREME COLD WEATHER MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3-54EXTREME HOT WEATHER MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...3-56GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..3-53UNUSUAL TERRAIN MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57GENERALa. Important References. Three importantmanuals to get acquainted with are: FM21-306, FM 9-207, and FM 21-60 providingoperational and ground guide instructions inall weather conditions to include extreme cold( 0 ° F t o - 6 5 ° F ( - 1 8 ° C t o - 5 4 ° C ) ).b. Vehicle. In addition to normal PMCS(pages 2-18 thru 2-48), special care in clean-ing and lubrication must be taken where ex-tremes of temperature, humidity, and terrainconditions are present or anticipated. Whenoperating in extremely dusty or snowy condi-tions, clean air filter bags frequently to pro-vide adequate air to engine.c. Armament. When not in use, cal .50machine gun should be covered. Keepmachine gun clean and lightly lubricated.When cleaning in cold weather, use CLP lubri-cant (item 3, appx D). Do not dilute or addantifreeze to rifle bore cleaner. When cleaningand lubricating have been done, store clean-ing solutions and lubricants in a warm place,if available.d. General Lubrication Notes.(1) Refer to appendix G for grades andtypes of cold weather lubricants.(2) In temperatures below freezing, keepmoving parts of machine gun and criticalparts of vehicle free of moisture.e. Maintenance Do’s and Don'ts.(1) Extreme Heat, Humid, or SaltyConditions.a. Don’t . . . . Park vehicle in sun forlong periods of time.b. Do . . . . . . Lubricate vehicle morefrequently because oil willevaporate.c. Do . . . . . . . . Clean and lubricateworking metal surfacesfrequently.d. Do . . . . . . . Apply a light film ofCLP (item 3, appx D) on machinegun and mount and keep coverin place.(2) Dusty and/or Sandy Areas.a. Do . . . . . . . . Park vehicles undershelter if possible. If none isavailable, cover vehicle withtarpaulin.b. Do . . . . . Keep machine gun lub-ricated and covered when not inuse.c. Do . . . . . . . Clean all dust and/orsand from all working metal sur-faces before operating.(3) During adverse conditions of heavyrains, high humidity, sand storms, very dusty,or muddy conditions, clean and lubricate vehi-cle more frequently to prevent damage toequipment. Be sure to clean and lubricatewinch wire ropes.Change 33 - 53
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