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CAUTION: Refer to Oil Level in the Refrigerant Ser- (13) Install refrigeration oil (500 SUS) into the compressor through the suction port. (14) Check compressor operation for smoothness by rotating crankshaft at least five full revolutions. (15) Check front housing clutch coil alignment pin for proper installation. (16) Install clutch assembly. COMPRESSOR HIGH-PRESSURE RELIEF VALVE The high pressure relief valve vents only a small amount of refrigerant necessary to reduce system amount of refrigerant, it does not necessarily mean (HPR) VALVE LOCATION The HPR Valve is located on the discharge line at the A/C compressor (Fig. 14). REMOVAL AND INSTALLATION (1) Using a refrigerant recovery machine, remove the refrigerant from the A/C system. (2) Rotate the high pressure relief valve counterclock- wise and separate relief valve from the vehicle (Fig. 15). To install, Reverse the preceding operation using a new O-ring seal. Evacuate and charge the refrigerant REFRIGERANT SYSTEM DIAGNOSIS Refer to the Refrigerant System Diagnosis chart in this section. Fig. 13 Felt Retainer and Felt Fig. 14 High Pressure Relief Valve— Typical Fig. 15 High Pressure Relief Valve—Typical Fig. 12 Installing Lip Seal Protector 24 - 30 HEATING AND AIR CONDITIONING Ä |