REPAIR (Cont) - TM-55-1905-223-24-170268

TM 55-1905-223-24-17

NOTE

The system cannot be pumped down when discharge and suction service valves

are being replaced with the compressor.

(1)

When possible, pump down the system to remove refrigerant charge from compressor

(2)

When defective components make it impossible to pump down the system, remove

refrigerant charge using the method given in (paragraph 4-10).

(3)

When replacing compressor suction and/or discharge service valve(s) (16 and 1,

FIGURE 4-19) the valves must also be isolated from the rest of the system. Evacuate

and recharge with R-22 refrigerant when discharge service valve is being replaced

b. Replace thermostat (25, FIGURE 4-19) and/or terminal gasket (28).

(1)

Remove four screws (24) and remove thermostat cover and bracket (23).

(2)

Tag and disconnect electrical wiring to thermostat (25) and compressor terminal (29).

(3)

Remove thermostat (25) from compressor. (4) Remove four screws (30) and remove

terminal (29) and gasket (28). Discard gasket.

(4)

Remove four screws (30) and remove terminal (29) and gasket (28). Discard gasket.

(5)

Install new thermostat (25).

(6)

Use a new gasket (28) and install terminal (29) with four screws (30).

capscrews to 18 ft-lb.

Replace suction (service) valve package (16) and/or discharge (service) valve package (1).

WARNING

Make sure valve package(s) being replaced have been isolated from the system

and refrigerant charge removed from line(s). System cannot be pumped down

when replacing discharge service valve.

(1)

Suction (service) valve package (16):

(a) Make sure system has been pumped down (Item 10, Table 4-1).

(b) Remove four capscrews (18) to disconnect suction valve (19) from motor end

cover (15).

4-61