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 284 of 1313
ENGINE FAILS TO CRANK - Continued
CONDITION/INDICATION
DOES THE STARTER MOTOR SOUND LIKE IT IS RUNNING OVERSPEED?
DECISION
NO - Perform Starter Motor Inoperative troubleshooting (WP
0086).
YES - Go to Step (7).
STEP
7.
DOES THE STARTER DRIVE OR RING GEAR HAVE ANY BROKEN OR MISSING TEETH?
a.
Remove starter motor (Volume 2, WP
0303).
T0036DAA
Starter Motor
Figure 7.
Starter Motor.
b.
Check starter drive and ring gear for missing and/or damaged teeth.
CONDITION/INDICATION
DOES THE STARTER DRIVE OR RING GEAR HAVE ANY BROKEN OR MISSING TEETH?
DECISION
YES - Starter damaged. Replace damaged starter motor (Volume 2, WP
0303). Go to Step (9) to verify problem
is solved.
YES - Ring gear damaged. Replace damaged ring gear (Volume 2, WP
0220). Go to Step (9) to verify problem
is solved.
NO - Go to Step (8).
TM 9-2320-272-23-1
0006
0006-7
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