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backed off, immediately point the end of hose toward (e) Install service port cap. DISCHARGE (HIGH PRESSURE) GAUGE CONNECTION (1) Remove the service port cap from the 1/4 in. service port. (2) Check all valves on the equipment being used to verify they are closed. (3) Inspect the hose gasket in the service port con- nector at the end of the (RED) hose. If the gasket is (4) Use a suitable (3/8 in. male to 1/4 in. female) adapter (Fig. 5), threaded securely into the end of the (5) Thread the 1/4 in. hose adapter connector onto the service port. Quickly secure adapter connector to To disconnect the discharge gauge (RED) hose: (a) Wrap the end of hose with a shop towel. service port to keep the gasket in contact with service (d) Quickly rotate the connector counterclockwise. When the hose connector is completely backed off, (e) Install service port cap. EVACUATION/RECOVERY/RECYCLING/CHARGING LINE CON- The center manifold (YELLOW) or (WHITE) hose is used to recycle, recover, evacuate, and charge the This hose should be attached to a R-12 Recovery/Recycling device. Refer to the Recovery/Recycling devices operators manual For disconnection of this hose, refer to Disconnect- ing the Discharge Gauge (RED) hose in the preced- TESTING FOR REFRIGERANT LEAKS If the A/C system is not cooling properly, deter- mine if the refrigerant system is fully charged with EMPTY REFRIGERANT SYSTEM LEAK TEST CAUTION: Review Safety Precautions and Warnings (1) Evacuate the refrigerant system to the lowest degree of vacuum possible. (2) Prepare a 10 oz. refrigerant (R-12) charge to be injected into the system. Refer to Charging Refriger- (3) Connect and dispense 10 ozs. of refrigerant into the evacuated refrigerant system. (4) Proceed to step two of Low Refrigerant Level Leak Test. LOW REFRIGERANT LEVEL LEAK TEST Caution: Review Safety Precautions and Warnings (1) Using the refrigerant level sight glass, deter- mine if there is any (R-12) refrigerant in the system. (2) Position the vehicle in a wind free work area. This will aid in detecting small leaks. (3) Bring the refrigerant system up to operating temperature and pressure. This is done by allowing (4) With the engine not running, use an Electronic Leak Detector (or equivalent) and search for leaks. ADDING PARTIAL REFRIGERANT CHARGE After all leaks have been corrected and it was not necessary to empty the refrigerant system, a partial CAUTION:Review all Safety Precautions and Warn- Fig. 5 Discharge Hose Adapter 24 - 10 HEATING AND AIR CONDITIONING Ä |