TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 186 of 1176
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ALL VEHICLE
ELECTRICAL SYSTEMS
INOPERATIVE
1. Open door of battery compartment.
Loosen two thumbscrews and slide
batteries onto running board.
Visually check connections of
battery cables (WP 0127 00).
2. Visually check batteries for cracks
and leaks. Check terminal posts for
corrosion and breaks
(TM 9-6140-200-14).
Test 1. Check specific gravity of each
cell before adding distilled
water.
1. Using optical battery tester,
which requires no
temperature compensation,
check specific gravity of
electrolyte in each cell.
2. Check specific gravity of cells
after battery has been
charged (TM 9-6140-200-14).
Ensure battery cables are correctly
connected to battery (WP 0126 00).
1. If any battery is cracked, leaking,
or has broken terminal posts,
replace battery (WP 0127 00).
2. If terminal posts or cables are
corroded, use soda-and-water
solution to neutralize battery acid.
3. Remove battery ground cable no. 7
from negative post first. Remove
cable clamps from battery posts.
Clean posts and mating surfaces to
bright metal (WP 0126 00).
4. If battery terminals are clean and
malfunction still exists, go to
test 1.
If specific gravity of any cell is below
1.225, battery must be replaced or
recharged. Add distilled water as
necessary after checking battery.
Charge battery as necessary.
(TM 9-6140-200-14).
1. If specific gravity of any cell does
not increase to 1.280 (full charge)
in 8 hours of charging, replace
battery (WP 0127 00).
2. All cells in a battery must test
within 0.025 point of one another.
If specific gravity of any cell is
lower than 1.225 (corrected to
80 °F [27 °C] if necessary) after 8
hours of charging, replace battery
(WP 0127 00).
TM 9-2320-361-24-1
0012 00
0012 00-2
BATTERY AND CHARGING SYSTEM TROUBLESHOOTING (Contd)
Table 1. Battery System Troubleshooting Procedure.
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