Mazda MX-3 silhouetteMX-3

AIR CONDITIONER — REFRIGERANT SYSTEM SERVICE PROCEDURES (Charging continued)

G-51prose procedure
Continued from G-50

REFRIGERANT SYSTEM SERVICE PROCEDURES

Charging (continued)

  1. 16
    Close the high-pressure side valve of the manifold gauge.
    Close-up of the manifold gauge body with flow arrows; left dial reads pressure. Illustrates closing the high-pressure side valve.
  2. 17
    Check for leaks by using a gas leak tester. If there are no leaks, go to step 18. If a leak is found at a loose joint, tighten the joint and check for leaks again. If there is still a leak at the same joint, discharge the refrigerant and then repair the joint. Repeat the charging procedure from step 9. If there are no leaks after tightening the joint, go to step 18.
  3. 18
    Open the high-pressure side valve of the manifold gauge and charge with half the regular amount of refrigerant.
    Manifold gauge set connected to two service cans and vacuum pump, charging hoses routed to cooler pipes. Illustrates charging with half the regular refrigerant amount.
  4. 19
    Close the high-pressure side valve of the manifold gauge.
    Running the engine with the high-pressure side valve open is dangerous. Pressure within the service cans will increase and the cans could explode, scattering metal fragments and liquid refrigerant that can seriously injure you. Therefore, do not open the high-pressure side valve while the engine is running.
  5. 20
    Start the engine and actuate the A/C compressor.
    Manifold gauge set with both gauge dials and flow arrows, connected to two service cans and vacuum pump. Illustrates charging with the remaining refrigerant via the low-pressure side.
  6. 21
    Open the low pressure side valve of the gauge set and charge with the remaining refrigerant.
  7. 22
    Close the low-pressure side valve of the manifold gauge.
  8. 23
    Stop the engine and A/C compressor.
  9. 24
    Check for leaks by using a gas leak tester. If there are no leaks, go to step 25. If a leak is found at a loose joint, tighten the joint and check for leaks again. If there is still a leak at the same joint, discharge the refrigerant and then repair the joint. Repeat the charging procedure from step 9. If there are no leaks after tightening the joint, go to step 25.
  10. 25
    Disconnect the high- and low-pressure side quick couplers from the charging valves.
    Quick couplers being disconnected from the charging valves, with caps shown being reinstalled (arrows from CAP labels point to the charging valve fittings).
  11. 26
    Install the caps to the charging valves.
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