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Charging A/C System

NOTE: See A/C SYSTEM SPECS in the AIR CONDITIONING section for system capacities. Manufacturer does not recommend using one pound cans. Using a charging station will allow precise measurement of R-12 charge.
  1. System must be evacuated before charging. With manifold gauge set attached from evacuation procedures, attach R-12 container to hose on center connector of manifold gauge set. Fully open R-12 container valve and purge air from center hose.
  2. Disconnect electrical connector from clutch cycling pressure switch, located on the accumulator. Install jumper wire between connector terminals.connector.
  3. Open low side valve on manifold gauge set and allow R-12 to enter system. When no more R-12 is being drawn into system, start and run engine. Place A/C-heater controls on MAX cold position with blower speed on high.
    NOTE: In high temperature areas, it may be necessary to operate a high volume fan to blow air through condenser and radiator.
  4. When proper amount of R-12 has been added, close low side valve on manifold gauge set. Remove jumper wire and connect clutch cycling pressure switch. Reinstall electrical connector.
  5. Operate system to verify proper operation and normal system pressures. Disconnect manifold gauges set. Install service port caps. Check system for leaks.
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