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 746 of 1313
SOLENOID OPERATES, STARTER OPERATES, BUT ENGINE CRANKS SLOWLY - Continued
STEP
4.
IS STARTER MOTOR VOLTAGE NORMAL?
a.
Set up multimeter to measure VDC.
T0925DAA
STARTER
SOLENOID
STARTER
MOTOR
Figure 4.
Battery/Solenoid Voltage Test.
b.
Connect multimeter red lead to starter, terminal 6. Refer to point to point schematics.
c.
Connect multimeter black lead to ground.
d.
Turn battery switch to ON position.
e.
Assistant cranks engine.
f.
Meter reading should be 22 VDC or greater while engine is cranked.
CONDITION/INDICATION
IS STARTER MOTOR VOLTAGE NORMAL?
DECISION
NO - Repair, clean, and tighten all battery terminal (Volume 2, WP
0349), starter (Volume 2, WP
0303), and
ground (Volume 2, WP
0350) connections. Go to Step (9) to verify problem is solved.
YES - Go to Step (5).
TM 9-2320-272-23-1
0087
0087-5
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