TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 376 of 1313
ENGINE OIL CONTAMINATED - Continued
CONDITION/INDICATION
DOES OIL SAMPLE TEST INDICATE OIL IS CONTAMINATED?
DECISION
YES - Excessive sludge in oil. Go to Step (4) to verify problem is solved.
YES - Oil is thin and black. Go to Step (2) (M939A2). Notify supervisor. It is possible that another troubleshooting
work package applies (M939/A1).
YES - Oil has a milky color, coolant is present in oil. Go to Step (3).
YES - Metal particles present in oil. Notify Supervisor. Action may not be possible at this level of maintenance.
NO - Notify Supervisor. It is possible that another troubleshooting work package applies.
STEP
2.
DOES THE TRANSFER PUMP LEAK OIL?
Check transfer pump seal and transfer pump mounting gasket for leaks.
T1111DAA
FUEL TRANSFER
PUMP
Figure 2.
Fuel Transfer Pump.
CONDITION/INDICATION
DOES THE TRANSFER PUMP LEAK OIL?
DECISION
YES - Replace transfer pump and/or gasket (Volume 2, WP
0243). Go to Step (4) to verify problem is solved.
NO - Notify supervisor. It is possible that another troubleshooting work package applies.
TM 9-2320-272-23-1
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