Table 1. Unit Preventive Maintenance Checks and Services (PMCS)
for the M915A3 Tractor Truck - Continued.
NOT FULLY MISSION
a. Check for looseness or side play in front
and rear drivelines. There should be no
play at U-joints. Check for bends, cracks,
and missing weights. Make repairs as
b. Check that U-joint mounting screw torque
is 33-38 lb-ft (44-52 Nm).
c. Inspect for loose or worn bearings, dam-
aged seals, and damaged or missing grease
fittings. Make repairs as needed.
d. Using a hand-type grease gun, lubricate
five grease fittings (22) at each driveline
with grease (Item 15, WP 0235 00) until
purging takes place at air hole in end of
slip yoke. Cover pressure relief hole while
e. Inspect for damaged or leaking input or
output shaft seals (23). If damaged or leak-
ing, notify Direct Support Maintenance.
a. Inspect spring pack for cracks or breaks.
b. Inspect spring pack and attaching hard-
ware for looseness, cracks, or other dam-
age. Tighten or replace damaged compon-
ents, if authorized.