P.S.I. at an outside air temperature of
approximately 700 - 75
). See figure 11.
Remove cap from shut off valve on the
receiver and, using Tool - ACL53-5,
turn valve in the full clockwise direction
until seated. See figure 16.
pressure side. In the pumped down
condition the high pressure gauge will
read low pressure, and the low pressure
gauge will read system pressure. The 15
P.S.I. in the low pressure side must be
slowly exhausted when any low pressure
fitting is opened.
Fig. 16. Turn Receiver Shut-off Valve
Clockwise Until Seated
When any part or assembly in the Air
Conditioning System is replaced, it is
extremely important to check all the
connections for gas leaks. If a leak is not
detected and corrected promptly, the Freon
gas pressure will eventually dissipate. With no
internal pressure to keep them out, moist air
and other contaminants may be drawn into the
system because of the expansion and
contraction caused by temperature changes.
If the following steps are followed, it will be
possible to detect extremely small leaks:
4. Start engine and run until there is no
liquid visible in sight gauge.
5. Run engine for an additional 3 minutes,
then turn low pressure valve, located on
right front fender apron, clockwise until
seated. Use Tool - ACL53-5.
6. Shut off engine.
Turn high pressure,
valve located on
condenser, clockwise until seated.
CAUTION: Never shut off high pres-sure
valve with the engine running. NOTE:
When system is completely pumped down
there is still approximately 15 P.S.I.
pressure in the low
1. If the system has just been serviced,
there is probably Freon present in the
immediate vicinity. It is re commended that
the vehicle be moved, and aired out.
2. Light the Leak Detector, Tool - ACL53-
2 (Instructions come with the unit), and
adjust the flame so that it is barely visible in
the flame shield window.
3. Move the detector hose slowly over the
entire system, being especially cautious at
and hose connections. If Freon is
present the flame will burn with a bright blue