TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 293 of 1417
STEP
3.
Check oil type, change oil filter, and recheck oil pressure.
a.
Refer to lubrication instructions to check oil type and replace oil if necessary (Volume 5, WP
0820).
b.
Replace oil filter (WP
0232).
c.
Dial 01 into TEST SELECT and press TEST.
d.
When PASS appears, dial 50 into TEST SELECT and press TEST. VTM will display RPM and oil pressure
alternately.
T0016DAA
Figure 4.
Pass Prompt Message.
e.
Start engine and hold engine speed at 2,100 RPM (TM 9-2320-272-10).
f.
Check VTM display for correct oil pressure.
Table
2.
Oil Pressure Limits
VEHICLE
Oil Pressure Limits
M939/A1
55-75 PSI (397-517 kPa)
M939A2
30-80 PSI (207-552 kPa)
g.
If oil pressure is not within limits, stop engine immediately (TM 9-2320-272-10).
CONDITION/INDICATION
Is oil pressure within limits?
DECISION
NO - Perform Low Oil Pressure troubleshooting (Volume 1, WP
0017).
YES - After completing repair, rerun Go-Chain test to verify problem is solved and no other problem exists.
END OF WORK PACKAGE
TM 9-2320-272-23-2
0197
0197-4
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