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 328 of 1417
NG90: GOVERNOR/POWER TEST FAULT ISOLATION - Continued
STEP
5.
Perform compression unbalance test.
a.
Stop engine.
b.
Shut off fuel supply so engine will not start.
c.
Dial 14 into TEST SELECT and press TEST.
Table
3.
Engine RPM Test.
TEST NO.
TEST
14
Compression Unbalance
d.
When GO appears, crank engine.
T0028DAA
Figure 2.
Prompt Message.
e.
Stop cranking when OFF or E013 is displayed.
CONDITION/INDICATION
Does VTM display a number?
DECISION
YES - Go to Step (6).
NO - Go to Step (7).
TM 9-2320-272-23-2
0204
0204-5
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