TM-9-2320-272-23-5
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 5 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-5 - Page 435 of 623
NOTES
1.
INTERVALS
This LO has been revised to comply with DA programming to extend intervals and conserve lubricants.
When practical, lubrication services will be made to coincide with the Vehicle "S" Preventive Maintenance
Service. For this purpose, a 10% tolerance (variation) in specified lubrication point mileage is permissible.
2.
CRANKCASE
CAUTION
If water or metal particles are detected during crankcase draining and filter element
changing, notify your supervisor before refilling crankcase.
NOTE
•
Withdraw dipstick slowly to ensure accurate reading. There are two marks on the
dipstick, H (HIGH) and L (LOW). The quantity of oil required to raise the oil level from
L (LOW) mark to H (HIGH) mark is approximately 7 qt (6.6 l) for M939 and M939A1
and 4 qt (3.6 l) for the M939A2.
•
Replace oil filter element each time crankcase is drained. Fill crankcase with
engine
oil.
•
M939 and M939A1 series vehicles have a crankcase capacity of 23 qt (21.8 l) and
an oil filter capacity of 4 qt (3.8 l).
•
M939A2 series vehicles have a crankcase capacity of 18 qt (17 l) and an oil filter
capacity of 2 qt (1.9 l).
•
Start engine and visually check for oil leaks at drain plug and oil filter case. Stop
engine and allow approximately one minute for oil to drain back into oil pan; recheck
oil level with dipstick. The dipstick is equipped with a seal which fits into the opening
of the dipstick tube. The seal is seated within the tube and must be turned
counterclockwise to be released before dipstick is withdrawn. Turn clockwise to seat
after oil level has been checked and dipstick installed.
Bring engine up to operating temperature and remove drain plug from oil pan. Inspect for presence of
metal particles and water while draining oil into a drainage container. Allow sufficient draining time so
that all oil has time to drain. Install drain plug and tighten to 60 to 70 lb-ft (81 to 95 N·m).
TM 9-2320-272-23-5
0820
0820-30
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