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 747 of 1313
SOLENOID OPERATES, STARTER OPERATES, BUT ENGINE CRANKS SLOWLY - Continued
STEP
5.
IS STARTER MOTOR TO SOLENOID VOLTAGE DROP NORMAL?
a.
Connect multimeter red lead to motor terminal stud of solenoid. Refer to point to point schematics.
T0698DAA
BLACK
RED
6
74
7
Figure 5.
Starter Motor To Solenoid Voltage Drop Test.
b.
Connect multimeter black lead to positive terminal stud of starter motor.
c.
Assistant cranks engine.
d.
Meter reading should be less than or equal to 0.1 VDC while engine is cranked.
CONDITION/INDICATION
IS STARTER MOTOR TO SOLENOID VOLTAGE DROP NORMAL?
DECISION
NO - Repair, clean, and tighten motor to solenoid battery voltage strap terminal
connections (Volume 2, WP
0303). Go to Step (9) to verify problem is solved.
YES - Go to Step (6).
TM 9-2320-272-23-1
0087
0087-6
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