TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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REFERENCE INFORMATION Change 1 2-67 LUBRICATION SYSTEM The tests in para. 2-26 test the oil level, cleanliness, leaks in the system, and the CDR valve. Return here when you've fixed everything you can or if no faults were found. PROCEDURE FOR CHECKING TRANSMISSION FLUID 1. Start engine. 2. Hold down brake pedal and move transmission shift lever through all ranges including reverse. 3. Engage parking brake and place shift lever in neutral. Check fluid level on dipstick. 4. Proper level is between "FULL" and "ADD" marks on dipstick. NOTE • Burnt smell, discoloration, or grit indicates worn or damaged internal components. Notify DS maintenance. • Bubbles indicate an overfilled system or air leaks in the system. Drain the fluid and refill to proper level. Refer to (para. 5-2). • Milky appearance is due to water in the system. Drain the fluid from the entire transmission and transmission cooling system and install a new filter. Refer to (para 5-2). • Check fill tube for indications of fluid being blown out. If fluid is being blown out, check vent line for obstructions, and refill transmission to proper level. Refer to (para. 5-2). • Transmission fluid coming out of dipstick filler tube indicates a restriction in the ventilation system. Check for clogged, melted, or crushed lines and/or fittings between transmission and atmosphere vent on air cleaner canister. Replace where needed. Refer to (para. 5-16). Among the items are the driveshafts, suspension, differentials, and geared hubs. CHECK FLUID FOR A BURNT SMELL, GRIT, DISCOLORATION, AIR BUBBLES, OR A MILKY APPEARANCE. TM 9-2320-280-20-1