Battery and Cables

TM 10-3930-632-12

c. Installation. Install the ignition coil as shown

high tension cable from the ignition coil, crank the

engine with the starter, and note the reading on the

in figure 4-24. Reconnect the electrical leads to the

voltmeter. If the difference between the two readings is

ignition coil.

more than 4 volts or the second reading is less than 8

4-37. Battery and Cables

volts, replace the battery.

c. Battery Removal.

a. Battery Cleaning.

(1) Loosen the nuts (fig. 4-25) that secure

(1) Swing out the right engine side panel

the battery cables to the battery posts; remove the

and swing out the battery tray to provide access to the

cables.

battery (fig. 4-25).

(2) Remove the battery from the truck as

shown in figure 4-25.

d. Cleaning and Inspection.

(1) Clean the battery tray and clamp by

flushing with a solution of baking soda. Flush parts until

bubbling stops when new solution is applied.

(2) Inspect the battery for loose posts,

cracks, evidence of leaks, or other damage.

(3)

Test the battery as directed in

subparagraph b.

e. Battery Installation. Install as shown in figure

4-25.

f. Cable Removal.

(1) Loosen the nuts (fig. 4-25) that secure

the cables to the battery posts; disconnect the cables.

Remove the cable clamp that secures the cables to the

Figure 4-25. Battery and Cables, Removal and

truck frame.

Installation

(2) Remove the starting motor mounting

bolt and lockwasher that secure the ground cable to the

(2) Remove dirt and grease accumulated

flywheel housing; remove the cable.

on the battery with a clean cloth.

(3) Remove the nut and lockwasher that

(3) Pour a solution of baking soda and

secure the positive battery cable to the solenoid switch

water on the top of the battery to neutralize any acid

mounted on the starting motor; remove the cable.

present. Continue to pour until the solution no longer

WARNING

bubbles when it contacts the battery.

Dry cleaning solvent, P-D-680, used to

(4) Loosen the nuts that secure the battery

clean parts is potentially dangerous to

cables to the battery posts; remove the cables. Clean

personnel and property. Avoid repeated

all corrosion from the cable clamps and posts with a

and prolonged skin contact. Do not use

wire brush or jackknife. Replace the cables; tighten the

near open flame or excessive heat. Flash

nuts.

point of solvent is 100F. -138F. (38C. -

CAUTION

60C.).

Remove ground cable first. When installing

g. Cleaning and Inspection.

cables, install ground cable last.

(1)

Clean the cables with a cloth

(5) Lightly coat the battery posts and cable

dampened in dry cleaning solvent P-D-680. Clean cable

clamps with high temperature grease.

clamps and lugs with a wire brush.

b. Battery Testing.

(2)

Inspect the cables for damaged

(1) Test the state of the electrolyte using a

insulation, breaks, or other damage.

hydrometer. The specific gravity of the electrolyte at 75

(3) Inspect cable clamps and lugs for

F shall be 1.225 minimum for normal temperature

corrosion, distortion, poor connections to cables, or

operation or 1.265 minimum for cold temperature

other damage.

operation. For constant operation in above-freezing

(4) Replace cables if defective.

temperatures, electrolyte strength may be reduced to

h. Cable Installation. Install as shown in figure

1.225 by diluting with distilled water. If the battery is not

4-25. Make sure the negative terminal is connected to

fully charged, charge it.

ground.

(2)

Connect a voltmeter across the

4-38. Lights, Horn and Wiring

terminals of the battery, and note the reading. Pull the

4-39