Flushing

Flushing

Tools Required
* J 41447 Leak Detection Dye
* J 42220 Universal 12V Leak Detection Lamp
* J 43600 ACR 2000 Refrigerant Station
* J 45268 Flush Adapter Kit

Important: Flushing is not intended to remove metal from the A/C system.

Flushing is intended to remove the following:

* Contaminated PAG oil
* Desiccant, following a desiccant bag failure
* Overcharge of PAG oil
* Refrigerant contamination

Important: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the orifice tube.
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor.
5. Install J 45268 -3 to the A/C compressor hose assembly.




6. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.
Perform the following procedure:

Important: The filter inside J 45268 -1 is serviceable. Remove and discard the check valve from the filter.

1. Service the filter with ACDelco P/N GF 470, before each flush.
Connect J 45268 -1 flush filter to the suction port of the J 45268 -3 flush adapter.
2. Connect the blue hose from the J 43600 to J 45268 -1 flush filter adapter.
3. Connect the red hose from the J 43600 to J 45268 -3.

7. Reverse flow refrigerant flushing is recommended for desiccant bag failure only. Perform the following procedure and replace the accumulator when the flush is complete:

Important: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

1. Service the filter with ACDelco P/N GF 470, before each flush.
Connect the J 45268-1 flush filter to the discharge port of J 45268 -3 flush adapter.
2. Connect the blue hose from J 43600 to J 45268 -1 flush filter adapter.
3. Connect the red hose from J 43600 to the suction port of J 45268 -3.

Important: Close the valve on the external refrigerant tank, before starting the flush process.

8. Flush the A/C system. Follow the instructions supplied with the J 43600.
9. Remove the J 45268 -3 from the A/C compressor hose assembly.

Important: Flushing will remove all the PAG oil from the A/C system.

The A/C system must be replenished with the correct amount of PAG oil.

10. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
11. Add back the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities.

Important: Flushing will remove the fluorescent leak detection dye from the A/C system.

12. Add one bottle of J 41447 directly to the A/C Compressor.
13. Install the A/C compressor.
14. Inspect the orifice tube for debris. Clean or replace as needed.
15. Install the orifice tube.
16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
17. Leak test the fittings using the J 42220.