TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 Change 1 2-137 2-28. SPECIAL INSTRUCTIONS a. General. Special instructions for operating and maintaining vehicles under unusual conditions are included in this section. Unusual conditions are extreme temperatures, humidity, and/or terrain. Special care in cleaning and lubrication must be taken in order to keep vehicles operational when operating under unusual conditions. WARNING This vehicle has been designed to operate safely and efficiently within the limits specified in this TM. Operation beyond these limits is prohibited IAW AR 750-1 without written approval from the Commander, U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-CM-S, Warren, MI 48397-5000. NOTE Except where noted, all normal operating procedures will apply in addition to special instructions for unusual operating conditions. b. Cleaning. Refer to para. 2-4 for cleaning instructions and precautions. c. Lubrication. Refer to appendix G for proper lubricating instructions. d. Driving Instructions. (1) FM 21-305, Manual for the Wheeled Vehicle Driver, contains special driving instructions for operating wheeled vehicles. (2) FM 55-30, Army Motor Transport Unit Operations, contains instructions on driver selection, training, and supervision. (3) FM 9-207, Operation and Maintenance of Ordnance Materiel in Cold Weather, contains instructions on vehicle operation in extreme cold of 0°F to -65°F (-18°C to -54°C). (4) Other documents with information on vehicle operation under unusual conditions are: (a) FM 31-70 Basic Cold Weather Manual (d) FM 90-5 Jungle Operations (b) FM 31-71 Northern Operations (e) FM 90-6 Mountain Operations (c) FM 90-3 Desert Operations e. Special Purpose Kits. Paragraphs describing special purpose kits for operation under unusual conditions are: (1) Deep water fording operation, para. 2-37. (2) Arctic operation, para. 2-39 or 2-40. f. Transmission Range Selection. For proper transmission range selection, refer to table 1-7 or table 1-8. If transmission range selection is peculiar to an unusual operating condition, it will be specified in the applicable paragraph. g. Transfer Case Range Selection. CAUTION • Vehicle must be stopped, engine off, and transmission shift lever in “N” (neutral) before transfer case can be shifted. Failure to do this will result in damage to drivetrain. • Damage to drivetrain will result if transfer case is operated in “L” (low range) or “H/L” (high lock range) on high traction surfaces with no wheel slippage. Section IV. OPERATION UNDER UNUSUAL CONDITIONS