Chapter 5: DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

TM 11-6140-203-14-4&P

CHAPTER 5

DIRECT SUPPORT AND GENERAL SUPPORT

MAINTENANCE

(d) Power Supply PP-1104C/G with

5-1.

General Instructions

relay, reverse current cutoff (NSN 5945-00-824-5575).

The direct support and general support maintenance

b. The following special cable assemblies are

procedures given in this chapter supplement those

available for the purpose indicated:

described for organizational maintenance (chap. 4) and

(1) Cable assembly, Power Electrical, CX-

consist of the following.

11934IU (NSN 6150-00-935-8722), No. 4 AWG wire.

a. Preparing a new battery for service (para 5-4).

(2) Cable assembly, Power Electrical, CX-

b. Adjusting electrolyte level (para 5-5).

11779IU, No. 00 AWG.

c. Periodic service procedures (quarterly) (para 5-

NOTE

6).

d. Troubleshooting (para 5-7).

AN/USM-432 and RF80GT come

equipped with proper mating cables to

e. Disassembly (para 5-8).

directly connect to the BB-693AIU.

f. Reconditioning battery components (para 5-9).

g. New cell procedures (para 5-10, 5-11).

5-4.

Preparing New Battery for Service

h. Vent valve test (para 5-12).

A new battery is a battery that has never been placed in

i. Battery heater blanket test (para 5-13).

use or a battery taken out of normal administrative

storage (para 5-15) for use. Perform the procedures

5-2.

Test Equipment, Tools, Additional Equipment

given in a through g below to prepare a new battery for

and Supplies

service

a. Test equipment and tools authorized for the direct

a Initial Inspection Remove the cover and perform

support and general support maintenance levels are

the following internal checks:

listed in the maintenance allocation chart (appx D).

(1) Damage. See whether any electrolyte

Expendable supplies and materials are listed in appendix

liquid has spilled into the battery case or shipping

container. This condition may be a sign of a damaged

CAUTION

cell

Maintenance personnel must wear a

(2) Electrical connections. Check all electrical

face shield (item 4, appx E) or goggles

connections for tightness. Test all studs on all terminals

(item 5) and an apron (item 6), while

to ensure tightness. Proper torque valve is 50 inch-

handling, servicing or making repairs to

pounds. Remove shorting spring from connector J2 if

a battery.

present. (Reserve for use in extended stoppages.)

Check any wiring for proper connection. Poor electrical

5-3.

Battery-Charger Equipment

contact may result in damage to the battery.

a. Analyzer-Charger, Battery AN/USM-432 (NSN

(3) Electrolyte level The batteries are normally

6130-01-055-1574) is the primary unit for use at direction

shipped with the proper amount of electrolyte. Do not

support and general support maintenance of Nickel-

add distilled water or electrolyte until after the battery is

Cadmium Battery BB-693A]U. If the AN/USM-432 is not

charged. When a battery has been discharged or

available, then any of the following units can be used.

allowed to stand unused over a period of time, the

(1) Analyzer-Charger,

Battery,

RF80GT

electrolyte becomes absorbed into the plates. The

(Christie).

batteries are shipped discharged and, therefore, the

(a) Charger, Battery PP-1659/G.

electrolyte level may seem low. Charging the battery

(b) Generator set, gasoline engine

should cause this level to rise to the proper mark, which

(NSN 6115-00-475-0029), 3 kilowatts, 28 volts dc, MIL-

is just above the tops (approximately one-fourth inch) of

G-52428 (used for battery charging where 115-volt or

the plates.

230-volt ac power is not available).

5-1