Chapter 5. DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

TM11-6130-381-14

CHAPTER 5

D I R E C T S U P P O R T MAINTENANCE INSTRUCTIONS

Section I. GENERAL

(4) If the control circuit card assembly and/or

5-1. Scope of Direct Support Maintenance

the battery charger subassembly is found to be

a. Direct support maintenance of the battery

defective, they are to be forwarded to general

charger consists of the following:

support maintenance for repair and further testing

(1) Troubleshooting (Section II)

in accordance with the requirements set forth in

(2) Maintenance (Section III)

TM 38-750.

(3) Testing (Section IV)

b. Direct support maintenance functions for the

5-2. Tools, Equipment and Material

battery charger are authorized by the Maintenance

a. Tools. The tools required to maintain the

Allocation Chart (MAC) in appendix B. Repair

battery charger at the direct support level are

parts authorized at the direct support maintenance

listed in appendix B, section III.

level are listed in the Repair Parts and Special

b. Test Equipment. The test equipment required

Tools List (RPSTL), TM 11-6130-381-34P.

to maintain the battery charger at the direct

c. This chapter provides detailed instructions,

support level are listed in appendix B, section III.

including step by step procedures and illustrations

c. Materials. The material required to maintain

to assist cognizant maintenance personnel in

the battery charger at the direct support level are

performing the following fault isolation, main-

as follows:

tenance and test functions.

(1) Silicone grease, Dow Corning, part no.

(1) A troubleshooting chart is provided to

FS3451-2, or equivalent.

enable fault isolation to a replaceable subassembly

(2) Anti-seize compound Per MIL-T-5542.

or chassis/panel mounted part.

(3) Silicone grease, Dow Corning, compound

(2) Maintenance procedures in section III

no. 5 or equivalent.

provide instructions to enable maintenance per-

(4) Adhesive RTV162 and primer SS4155

sonnel to replace a defective subassembly or part

General Electric.

isolated by inspection, test or troubleshooting.

(5) Adhesive 1177 and primer I007P, United

(3) Test procedures in section IV provide

Shoe Machine Corp.

instructions for checking that the repaired unit is

(6) Primer (grade N, form R) and sealing

functioning properly.

compound (grade EV) per MIL-S-22473.

Section II. TROUBLESHOOTING

the fault. Sectionalization means tracing the fault to

5-3. General

a major circuit group of the equipment, such as the

WARNING

input power circuit, the control circuit card

When servicing the battery charger, be

assembly, the battery charger subassembly or the

extremely careful of the high voltages.

230 vac conversion assembly. Determination of the

Serious injury or death may result from

circuit group at fault is accomplished as follows:

contact with the output terminals.

a. Visual Inspection. The purpose of Visual

Reenergize the equipment, and disconnect

inspection is to locate faults without testing or

it from the input power source prior to

measuring circuits. All meter readings, or other

performing any maintenance.

visual indications, should be observed and an

Troubleshooting at the direct support level in-

atttempt made to sectionalize the fault to a par-

cludes all techniques given for organizational

ticular circuit group.

maintenance in addition to the techniques stipulated

b. Operational Tests. An operational test

herein. Procedures for fault isolation are contained in

frequently indicates the general location of trouble.

paragraphs 5-4 and 5-5. The initial phase in ser-

In many instances, the test will help to determine

vicing a defective battery charger is to sectionalize

5-1