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TM 5-4120-287-15
the air conditioner; thus precluding the necessity of unbrazing and brazing the valve bodies from their associated air
conditioner tubing.
7-18. Solenoid Valve
a.
Discharge refrigerant system in accordance with paragraph 7-7.
b.
Disassemble solenoid valve (31, fig. 7-3) in numerical sequence as illustrated in figure 7-5.
c.
Reassembly solenoid valve, using new components, in reverse of numerical sequence as illustrated in figure 7-5.
d.
Recharge refrigerant system in accordance with paragraph 7-8 and 7-9.
e.
Check for refrigerant leakage in accordance with paragraph 7-6.
7-19. Liquid Quench Valve
a.
Discharge refrigerant system in accordance with paragraph 7-7.
b.
Disassemble liquid quench valve (61, fig. 7-3) in numerical sequence as illustrated in figure 7-6.
NOTE
Remove tape insulation and clamps, holding remote sensing bulb to refrigerant return tube (45, fig. 7-3)
and remove bulb and its associated tubing with valve power head.
c. Reassemble liquid quench valve, using new components, in reverse of numerical sequence as illustrated in figure 7-6.
d.
Clamp, insulate and tape remote sensing bulb to refrigerant return tube (45, fig. 7-3) and clamp remote sensing bulb
tubing, using existing clamps.
e.
Recharge refrigerant system in accordance with paragraphs 7-8 and 7-9.
f.
Check for refrigerant leakage in accordance with paragraph 7-6.
7-20. Hot Gas Bypass Valve
a.
Discharge refrigerant system in accordance with paragraph 7-7.
b.
Disassemble hot gas bypass valve (50, fig. 7-3) in numerical sequence as illustrated in figure 7-7.
c.
Reassemble the hot gas bypass valve, using new components, in reverse of numerial sequence as illustrated in
figure 7-7.
d.
Recharge refrigerant system in accordance with paragraphs 7-8 and 7-9.
e.
Check for refrigerant leakage in accordance with paragraph 7-6.
7-21. Thermostatic Expansion Valve
a.
Discharge refrigerant system in accordance with paragraph 7-7.
b.
Disassemble thermostatic expansion valve (37, fig. 7-3) in numerical sequence as illustrated in figure 7-8.
NOTE
Remove tape insulation and clamps holding remote sensing bulb to evaporate outlet tube (42, fig. 7-3) and
remove bulb with valve power head.
c.
Reassemble thermostatic expansion valve, using new components, in reverse of numerical sequence as illustrated
in figure 7-8.
d.
Clamp, insulate and tape remote sensing bulb to evaporator outlet tube (42, fig. 7-3) and clamp remote sensing bulb
tubing using existing clamps.
e.
Recharge refrigerant system in accordance with paragraphs 7-8 and 7-9.
f.
Check for refrigerant leakage in accordance with paragraph 7-6.
7-22. Pressure Relief Valve
a.
Discharge refrigerant system in accordance with paragraph 7-7.
b.
Remove pressure relief valve (28, fig. 7-3) and replace with a new valve in accordance with paragraph 7-15b.
c.
Recharge refrigerant system in accordance with paragraphs 7-8 and 7-9.
d.
Check for refrigerant leakage in accordance with paragraph 7-6.
7-23. Valve Body Replacement
When necessary to replace a valve body, perform the following:
a. Discharge and purge refrigerant system in accordance with paragraphs 7-7 and 7-8.
7-10
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