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(5) Evacuate and charge the refrigerant system. If oil loss of 3 ml (1 oz) or greater is suspected, refer to COMPRESSOR HIGH PRESSURE CUT-OUT SWITCH The High Pressure Cut Out (HPCO) switch is lo- cated on the rear cover of the Variable Displacement disengage the compressor clutch by monitoring the DIAGNOSIS Review Safety Precautions and Warnings before proceeding with this operation. Connect a suitable manifold gauge set to the refrig- erant system service ports. Work area temperature (1) Raise hood of vehicle. brake set, start engine and allow to idle at 1300 rpm. (3) Set the A/C controls to A/C and High blower. kPa (430 psi) 6138 kPa (20 psi) the compressor clutch should be engaged. CAUTION: Do not allow engine to overheat when ra- (7) Block radiator air flow with a suitable cover to increase the high side pressure to at least 3100 kPa (8) Remove cover from front of vehicle to allow high side pressure to decrease. When pressure drops REMOVAL AND INSTALLATION (1) Using a refrigerant recovery machine, remove the refrigerant from the A/C system. Fig. 3 Remove Shaft Seal Fig. 4 Shaft Seal Protector Fig. 5 Install Shaft Seal Fig. 6 Variable Displacement Compressor—Model 6C17 Ä HEATING AND AIR CONDITIONING 24 - 21 |