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 280 of 1313
ENGINE FAILS TO CRANK - Continued
STEP
2.
DO BATTERIES HAVE CORRECT SPECIFIC GRAVITY?
a.
Access batteries.
T0033DAA
Figure 2.
Battery Specific Gravity Test.
b.
Check each battery for specific gravity. Correct level is 1.225 or greater, temperature corrected. Each
cell must also test within 25 points of the others.
c.
If specific gravity is incorrect add distilled water or recharge batteries if necessary.
d.
Perform specific gravity test again.
CONDITION/INDICATION
DO BATTERIES HAVE CORRECT SPECIFIC GRAVITY?
DECISION
NO - Replace defective battery (Volume 2, WP
0346). Go to Step (9) to verify problem is solved.
YES - Go to Step (3).
TM 9-2320-272-23-1
0006
0006-3
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