Chapter 5. DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

TM5-4120-347-14

CHAPTER 5

DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Section/Paragraph

Repair Parts, Special Tools, TMDE, and

Refrigeration System Troubleshooting . . . ...5-15

Support Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I

Overheating Checks . . . . . . . . . . . . . . . . . . . . ...5-16

Refrigerant Pressure Check. . . . . . . . . . . . . ...5-17

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Repairs and Replacement of Mechanical Items. . . ll

Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . ...5-18

Assistance to Organizational Maintenance . . . 5-2

Expansion Valve (Primary) . . . . . . . . . . . . . . ...5-19

Authorized Repair/Replacement Procedures . . 5-3

Expansion Valve (Quench) . . . . . . . . . . . . . . ...5-20

Fabric Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5-4

Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . ...5-21

Top Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5-5

Pressure Regulator . . . . . . . . . . . . . . . . . . . . . ...5-22

Screens, Guards and Louvers . . . . . . . . . . . . ...5-6

Actuating Cylinder . . . . . . . . . . . . . . . . . . . . . ...5-23

Electric Motor Repair . . . . . . . . . . . . . . . . . . ...5-7

Pressure Switches . . . . . . . . . . . . . . . . . . . . . ...5-24

Refrigeration System Repairs General . . . . ...5-8

Charging (Service) Valves . . . . . . . . . . . . . . ...5-25

Discharging the Refrigerant System . . . . . . ...5-9

Pressure Relief Valve . . . . . . . . . . . . . . . . . . . ...5-26

Purging the Refrigerant System . . . . . . . . . ...

5-10

Condenser Coil . . . . . . . . . . . . . . . . . . . . . . . . ...5-27

Brazing/Debrazing Procedures. . . . . . . . . . ...5-11

Dehydrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5-28

Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . ...5-12

Liquid Indicator (Sight Glass) . . . . . . . . . . . ...5-29

Evacuating the Refrigerant System . . . . . . ...5-13

Compressor . . . . . . . . . . . . . . . . . . . . . . . ......5-30

Charging the Refrigerant System . . . . . . . . ...5-14

Tubing and Fittings . . . . . . . . . . . . . . . . . . . . ...5-31

Section I.

REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

5-1.

GENERAL

a. Repair parts are listed and illustrated in TM5-4120-347-24P. No special tools are required for

maintenance of the equipment. Test, maintenance and diagnostic equipment (TMDE), and support equipment

include standard electrical test equipment found in any organizational maintenance electric shop.

b. For authorized common tools and equipment refer to the Modified Table of Organization and Equipment

(MTOE) applicable to your unit.

c. Tool Kit, Service, Refrigeration Unit, NSN 5180-00-596-1474, contains hand tools and equipment used for

air conditioner maintenance. The following common items not contained in the refrigeration unit tool kit are

also required for air conditioner maintenance.

Description

National Stock Number

7520-00-223-8000

Brush, Bristle

Brush, Wire

Bucket

Heat Gun

Pliers, Long Round Nose

5120-00-268-3579

Rubber Gloves

8415-00-266-8677

Safety Goggles

4240-00-052-3776

5-1