Chapter 4. DIRECT SUPPORT MAINTENANCE

TM 5-4120-364-13

CHAPTER 4

DIRECT SUPPORT MAINTENANCE

S e c t i o n I . R e p a i r P a r t s , S p e c i a l T o o l s , TMDE, and Support Equipment

REPAIR PARTS.

4-1.

Repair parts are listed and illustrated in the repair parts and special tools list

T M 5-4120-364-23P covering direct support maintenance of this equipment.

SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

4-2.

T o o l Kit, Service, Refrigeration Unit, LINW5362 is the only special tool required to

p e r f o r m direct support maintenance on the air conditioner.

Section II. Troubleshooting

4-3.

TROUBLESHOOTING TABLE.

a . T h e troubleshooting table (table 4-1) lists the common malfunctions which

y o u may find during the operation or maintenance of the air conditioner or its com

ponents. You should perform the test/inspections and corrective actions in the order

listed.

b . T h i s manual cannot list all malfunctions that may occur, however, all

t e s t s or inspections and corrective actions are listed for most common malfunctions.

If a malfunction is not listed or is not corrected by listed corrective actions,

notify your supervisor.

S e c t i o n III. Maintenance Procedures

REFRIGERANT SYSTEM.

4-4.

Nearly all operations for the correction of malfunctions found in troubleshooting,

or maintenance activities of direct support require that the refrigeration system

b e opened to sane extent. Refer to the following paragraphs: 4-5 through 4-10 for

s t e p s to be taken before performing maintenance. S e e f i g u r e 4 - 1 f o r r e f r i g e r a t i o n

f l u i d diagram.

PRESSURE GAGES, INSTALLATION AND REMOVAL.

4-5.

a . R e f e r to figure 4-2 and backseat the suction service valve and remove

c a p from port.

I n s t a l l and tighten a compound pressure gage (suction pressure), (30

inches vacuum, 100 pounds pressure).

T u r n valve stem one turn clockwise so gage will register,

d . B a c k s e a t discharge service valve and remove sensing element line of high

p r e s s u r e switch from service valve port by removing flare nut and tube.

I n s t a l l high pressure gage (0 to 300 pounds pressure).

4-1