LO-9-2320-363-12
TRUCK, TRACTOR, LINE HAUL 52,000 GVWR , 6X4, M915A2; TRUCK, TRACTOR, LIGHT EQUIPMENT TRANSPORTER (LET) 68,000 GVWR, 6X6, W/WINCH, M916A1
LUBRICATION ORDER
DECEMBER 1991
LO-9-2320-363-12 - Page 20 of 24
d. Shaft Universals
Lubricate every 5,000 miles or semiannually in the following manner:
(1) Check for looseness.
(2) Apply grease.
(3) Observe lube purging from all seals until new grease comes out.
(4) If grease does not purge, manipulate the universal joint until purging occurs.
(5) If the above is not successful, remove cup or joint and check old grease. If rusty, gritty,
or burnt, replace the universal joint.
e. Steering Gear
Lubricate every 5,000 miles or semiannually in the following manner:
(1) Locate grease fitting on trunnion side of the steering gear, near the output shaft.
CAUTION: Do not use an automatic or power grease gun on this fitting, because the rate
of flow is too high. This high-flow rate could force grease inside the high-pressure seal,
which could contaminate the hydraulic system and also promote seal leakage.
(2) Use a hand-type grease gun to force grease through the fitting until you can see it past
the external dirt and water seal.
f. Driveline Universal Joints, Slip Yokes, and Splines
Lubricate every 20,000 miles or semiannually as follows:
(1) Check for looseness or sideplay.
(2) Apply grease until purging takes place at the air hole in the end of the slip yoke.
3. FUEL FILTER
Install new fuel filters every 10,000 miles. Fill the new filters with clean fuel; install the filters, turning
them until they fully contact the gasket, then turn an additional 1/2 turn by hand.
4. POWER STEERING FLUID AND FILTER
Check daily with the fluid at operating temperature and engine running. Change filter and oil initially
after 5,000 miles and then every 20,000 miles or annually.
5. FORWARD-REAR AXLE OIL FILTER
a. Initially, the filter should be changed at the same time as the oil (5,000 miles). After that, change
the filter at 75,000-mile intervals or annually.
NOTE: There may be approximately 1 pint of lubricant remaining in the filter. Be careful not to
spill it when removing the filter.
b. To change the filter, use a suitable filter strap wrench.
LO 9-2320-363-12-20
Card 20 of 24
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