TM-9-2320-387-10 HMMWV Operator Manual Download
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G-3. LUBRICATION INTERVALS G-4. LUBRICATION FOR OPERATION UNDER EXTREME TEMPERATURES G-5. CORROSION CONTROL a. Service Interval Under Normal Conditions. Service intervals listed are for normal operation in moderate temperatures, humidity, and atmospheric conditions. Hard-time intervals may be shortened if your lubricants are contaminated or if you are operating the equipment under adverse conditions, including longer-than-usual operating hours. Hard-time intervals may be extended during periods of low activity, though adequate preservation precautions must be taken. Perform semiannual service intervals every six months, or 3,000 miles (4,827 km), whichever comes first. b. Service Interval Under Unusual Conditions. Increase frequency of lubricating service when operating under abnormal conditions such as high or low temperatures, prolonged high-speed driving, or extended cross-country operations. Such operation can diminish lubricant’s protective qualities. More frequent lubricating service intervals are necessary to maintain vehicle readiness when operating under abnormal conditions. c. Hard-Time Intervals. Intervals shown in this appendix are based on mileage and calendar times. An example of mileage and calendar interval is: 3/S, in which 3 stands for 3,000 mi (4,827 km), and S stands for semiannually (every six months). The lubrication of the vehicle is to be performed at whichever interval occurs first. For equipment under manufacturer’s warranty, hard-time oil service intervals shall be followed. d. Army Oil Analysis Program (AOAP). ECV/HMMWV engines and transmissions are enrolled in the Army Oil Analysis Program (AOAP). The sampling interval for the engine is every six months or 3,000 miles (4,827 km) (100 hours if hour meter is installed) of operation. For the transmission, the sampling interval is every 12 months or 6,000 miles (9,654 km) (300 hours if hour meter is installed) of operation. a. Changes in Lubricant Grades. Lubricant grades change with weather conditions. Refer to lubrication table for lubricant grade changes. b. Arctic Conditions. Refer to FM 9-207, Operation and Maintenance of Ordnance Materiel in Cold Weather (0°F to -65°F) (-18°C to -54°C), or the lubrication table. Refer to para. 2-4 for appropriate corrosion control procedures. TM 9-2320-387-10 G-2 Change 1