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NOTE:
TO REMOVE VALVE CORE, REMOVE CAPS, AND REMOVE CORES WITH A
STANDARD VALVE CORE REMOVAL TOOL BY TURNING COUNTER-CLOCK-
WISE.
INSTALL CORES WITH TOOL BY TURNING CLOCKWISE.
Figure 5-20.
nitrogen when making repairs, pulling a vacuum
on the system and system operating pressure
tests. The valves have a removable core. A hose
with valve core depressor must be used when serv-
icing, purging, pulling a vacuum or when con-
necting gauges for system operating pressure
tests.
b. Removal
(1) Refer to figure 3-6 and remove the fresh
air inlet screen.
(2) Refer to paragraph 3-24 and remove the
condenser fan.
(3) Discharge the refrigerant system (para
6 - 4 ) .
Service valves.
(4) Refer to figure 5-20 and remove the suc-
tion and discharge service valves.
c. Repair. The service valves are repaired by
replacing the valve core. Refer to figure 5-20.
Note. The valve cores can be removed without re-
moving the valves. Discharge the refrigerant system
(para 6–3) before removing and replacing valve cores.
d. Installation.
(1) Install the service valves in reverse
order of removal.
(2) Refer to paragraph 6-3 for soldering
procedures.
(3) Pressure test, evacuate, and recharge
the refrigerant system (para 6-5).
5-25
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