TM 5-3740-214-14
ENGINE ASSEMBLY MAINTENANCE (Continued)
b. Service and test battery.
(1)
Check battery visually.
(a) Undo retainer strap and remove battery box cover.
(b) Make sure the battery cables are tight on terminals. They should not be able to be moved by hand.
(c) Make sure battery ground connection is securely fastened to base assembly.
(d) If there is any corrosion on the battery or around the terminals, rinse it off with a baking soda and water
solution.
(e) If there is dirt on top of the battery, brush it off.
(f) If cable insulation is frayed or broken, replace the cable.
(g) If there are cracks in the sides or the cover of battery, replace it.
(2) If the meter reads less than 11.5 volts, go to Step 1c. Check electrolyte in battery. Use a hydrometer to
check specific gravity.
CAUTION
The electrolyte level must be kept above the plates in the
battery. DO NOT overfill the battery. The electrolyte should
not overflow onto the battery cover when the cell covers
are placed over the cells.
NOTE
Use distilled water or a good grade drinking water
(excluding mineral water).
(a) Remove battery box cover.
(b) Remove cell covers and check electrolyte level. Add distilled water if the level is below the top of battery
plates.
(c) Check specific gravity.
(d) If the specific gravity is between 1.250 and 1.280, the cells are ok.
(e) If the specific gravity is between 1.225 and 1.250, the cells are still in fair condition.
(f) If the specific gravity is below 1.150 in any one cell, replace the battery.
Change 1 4-77
