Charging

1. Move the A/C mode control lever to "OFF." Start the engine and run until the engine is at normal operating temperature.

2. With the Refrigerant-12 drum inverted, open the Refrigerant-12 source valve(s). Allow 0.453 kg (1 lb.) of liquid Refrigerant-12 to flow into the system through the low-side service fitting on the accumulator.

3. As soon as 0.453 kg (1 lb.) of Refrigerant-12 has been added to the system, engage the compressor by setting the A/C mode lever to "NORM A/C" and adjust the blower speed to "HI" to draw in the rest of the Refrigerant-12 charge.

NOTE: To speed up the charging operation, a large volume tan can be used to pass air over the condenser. If condenser temperature remains below the charging cylinder temperature, Refrigerant-12 will enter the system more rapidly.

4. Turn off the Refrigerant-12 source valve. Run the engine for 30 seconds to clear lines and gages.

5. With the engine running, remove the low-side charging hose adapter from the accumulator service fitting. Unscrew it rapidly to avoid excessive Refrigerant-12 loss from the system.

CAUTION: Never remove a gage line from its adapter when the line is connected to the air conditioning system. Always remove the line adapter from the service fitting to disconnect a line. Do not remove the charging hose at the gage set while it is attached to the accumulator. This will result in the system being completely discharged, because the low-side service fitting is fully depressed. Complete discharge may cause personal injury due to escaping Refrigerant-12.


6. Replace the protective cap on the accumulator fitting.

7. Turn the engine off.

8. Check the system for leaks with a J 39400 Leak Detector.

9. Start the engine.

10. With system fully charged and checked for leaks, perform a "Performance Test." Refer to Testing and Inspection / Procedures / With A/C / General Mechanical Checks / Performance Test. Testing and Inspection