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).
TM 9-2320-280-20-1
2-18
Change 1
NOT FULLY MISSION
CAPABLE IF:
