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 296 of 1417
FIELD MAINTENANCE
NG30: ENGINE CRANK - NO START
INITIAL SETUP:
Personnel Required
(2)
References
TM 9-2320-272-10
TM 9-4910-571-12&P
References (cont.)
Volume 1, WP
0021
WP
0202
WP
0239
WP
0258
TROUBLESHOOTING PROCEDURE
NG30: ENGINE CRANK - NO START
STEP
1.
Perform crank speed test.
a.
Shut off fuel.
b.
Dial 10 into TEST SELECT and press TEST.
Table
1.
Engine RPM Test.
TEST NO.
TEST
10
Engine RPM (Average)
c.
Crank engine and watch readout display.
d.
Compare result with minimum cranking speed of 100 RPM.
CONDITION/INDICATION
Is cranking speed OK?
DECISION
YES - Go to Step (2).
NO - Go to NG80: Starter Circuit Test (WP
0202).
TM 9-2320-272-23-2
0199
0199-1
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