TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 109 of 890
Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd) ITEM NO. INTERVAL ITEM TO BE INSPECTED PROCEDURES 16 Semi- Driveline f. M998, M998A1, and M1121 series f. Lube level not within Annual Compo- vehicles – Check differential lubricant 1/4 inch (6.4 mm) of fill nents level semiannually or every (3,000 miles) plug opening when cold (Cont’d) (4,830 km). M998A2 and M1123 series or to plug level when hot. vehicles – Change differential lubricant semiannually or every 3,000 miles (4,830 km). Differential level should be within 1/4 inch (6.4 mm) of fill plug opening when lubricant is cold or to plug level when hot. g. Inspect U-joints for damage, free g. U-joint is damaged, play, and missing or unserviceable unserviceable, or missing lubrication fittings. lubrication fitting. h. Tighten front prop shaft mounting h. Loose, missing, or capscrews to 13-18 lb-ft (18-24 N•m) broken capscrews. and center support capscrews to 60 lb-ft (81 N•m). Tighten rear prop shaft capscrews to 13-18 lb-ft (18-24 N•m) and tighten U-bolt nuts to 21 lb-ft (29 N•m). i. Inspect rubber block and center i. Rubber block or center support bearing for wear and wobble in support bearing is worn or propeller shaft. propeller shaft wobbles. TM 9-2320-280-20-1 2-18 Change 2 NOT FULLY MISSION CAPABLE IF: CENTER SUPPORT BEARING RUBBER BLOCK