Flushing

Flushing

Tools Required

* J43600 Air Conditioning Service Center
* J45268 Flush Adapter Kit
* J41447 Leak Detection Dye
* J42220 Universal 12V Leak Detection Lamp

Important: Flushing with the ACR 2000 is not intended to remove metal from the A/C system.

Flushing is intended to remove the following contaminants:

* 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 TXV.
4. Remove the A/C compressor.
5. Install J45268 - 5 to the discharge hose.
6. Install J45268 - 4 to the suction hose.




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

Important: The filter inside J45268 - 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 J45268 - 1 flush filter to the suction port of J45268 - 4 flush adapter.
2. Connect the blue hose from J43600 to J45268 - 1 flush filter adapter.
3. Connect the red hose from J43600 to J45268 - 5 flush adapter.

8. Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace the receiver dehydrator when the A/C flush is complete and perform the following procedure:

Important: The filter inside J45268 - 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 J45268 - 1 flush filter to the discharge port of J45268 - 5 flush adapter.
2. Connect the blue hose from J43600 to J45268 - 1 flush filter adapter.
3. Connect the red hose from J43600 to the suction port of J45268 - 4 flush adapter.

9. Flush the A/C system. Follow the instructions supplied with J43600. Close the valve on the external refrigerant tank, before starting the flush process.
10. Remove J45268 - 4 from the suction hose.
11. Remove J45268 - 5 from the discharge hose.
12. Remove J45268 - 1 from J43600.

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.

13. If you will reinstall the removed A/C compressor, perform the following procedure:

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

14. If you will replace the A/C compressor after flushing the system, perform the following procedure:

1. A new service compressor is shipped with PAG oil. Refer to the Refrigerant System Capacities.
2. Deduct the amount of PAG oil shipped with the service compressor from the amount of PAG oil listed in the capacities table. Refer to Refrigerant System Capacities. Add the calculated amount to the compressor, as needed.

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

15. Add one bottle of J41447 directly to the A/C compressor.
16. Install the A/C compressor.
17. Remove J45268 - 103.
18. Install new seal washers.
19. Inspect the TXV for debris. Clean or replace as needed.
20. Install the TXV.
21. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
22. Leak test the fittings using J42220.