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 TM5-4120-383-14
5-27.
SERVICE (CHARGING) VALVES.-Continued
(3) Discharge and purge refrigeration system per paragraphs
5-11 and 5-12.
(4) Remove screw, lock washer, flat washer, and loop clamp
from the valve to be replaced.
(5) Disconnect flare nut from valve to be replaced and remove
valve from unit.
Inspect service valves for damage and
b. Inspect/Replace .
replace if suspected bad.
Installation.
c.
(1) Slip valve in place and tighten flare nut.
(2) Secure with screw, lock washer, flat washer, and loop
clamp.
(3) Replace dehydrator. (See para 5-30.)
(4) Leak test newly connected joints and all connections in
the area.
(5) Install top rear cover (para 4-11).
(6) Evacuate and charge the refrigeration system in
accordance with paragraphs 5-15 and 5-16.
PRESSURE RELIEF VALVE.
The pressure relief valve is located in the rear (compressor/
condenser) compartment.
a.
Removal.
(See fig. 5-17.)
(1) Disconnect power at power source.
(2) Remove top rear cover (para 4-11).
(3) Discharge and purge refrigeration system per paragraphs
5-11 and 5-12.
(4) Remove screw, lock washer, flat washer, and loop clamp.
(5) Use two wrenches, one to hold fitting and the other to
remove valve. Unscrew valve and remove it from unit.
5-64
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