TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 98 of 890
Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd) ITEM NO. INTERVAL ITEM TO BE INSPECTED PROCEDURES 3 Semi- Fuel d. Inspect all fuel lines for loose con- d. Any class III leak. Annual System nections, splits, cracks, and bends that (Cont'd) could leak. e. Disconnect leads from each e. Continuity is not glow plug (paragraph 3-38) and check present. for resistance between glow plug ter- minal and ground. Continuity should be present. f. Check each glow plug for looseness f. Glow plugs are loose and damage. Tighten each plug to or damaged. 8-12 lb-ft (11-16 N•m). g. Check locknut on body mounts. g. Body mounts loose. Proper torque 90 lb-ft (122 N•m). h. Check the fuel tank for propeller h. Any class III fuel leak shaft rub marks and damage. Ensure or tank strap improperly straps are properly installed in fuel installed or loose. tank slots. Tighten strap locknuts to 23-27 lb-in. (2.6 - 3 N•m). 4 Semi- Engine a. Check for missing, broken, cracked, a. Any drivebelt is miss- Annual Accessory and frayed drivebelts. Ensure ing, broken, frayed, or Drive and serpentine drivebelt has not moved dry-rotted. Belt fiber has Serpentine out of place on pulley. more than one crack 1/8 in. Belt (3.2 mm) in depth or 50% of belt thickness) or has frays more than 2 in. (51 mm) long. Serpentine belt has moved out of place on pulleys. b. (All models except M1123 and “A2” b. Tension below 70 lbs vehicles). Check all drivebelts tension (311 N), or greater than using belt tension gauge. Belt tension 110 lbs (489 N) new belt should be 70 lbs (311 N) minimum. If and 95 lbs (422 N) belt tension is not at least 70 lbs (311 N), old belts. adjust drivebelts (paragraph 3-82). Tension should not be greater than 110 lbs (489 N) for new belts; old belts 95 lbs (422 N). 5 Semi- Protective a. Inspect four nuts for security of a. Mounting not secure, Annual Control Box mounting. four nuts loose. b. Ensure cannon plugs are securely connected to box. TM 9-2320-280-20-1 Change 1 2-7 NOT FULLY MISSION CAPABLE IF: