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Flushing




Flushing

Tools Required
* J 43600 Air Conditioning Service Center
* J 45268 Flush Adapter Kit
* J 41447 Leak Detection Dye
* J 42220 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 (Refrigerant Recovery and Recharging).
2. Remove the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement (Service and Repair).
3. Install J 45268 - 103.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement (LH8) (Service and Repair)Air Conditioning Compressor Replacement (LLV, LLR) (Service and Repair).
5. Install J 45268 - 5 to the discharge hose.
6. Install J 45268 - 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 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 J 45268 - 4 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 J 45268 - 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 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 discharge port of J 45268 - 5 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 - 4 flush adapter.

9. Flush the A/C system. Follow the instructions supplied with J 43600 . Close the valve on the external refrigerant tank, before starting the flush process.
10. Remove J 45268 - 4 from the suction hose.
11. Remove J 45268 - 5 from the discharge hose.
12. Remove J 45268 - 1 from J 43600 .

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. Drain the PAG oil from the A/C compressor.
Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
14. Add back the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities ([1][2]Capacity Specifications).

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


15. Add one bottle of J 41447 directly to the A/C compressor.
16. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement (LH8) (Service and Repair)Air Conditioning Compressor Replacement (LLV, LLR) (Service and Repair).
17. Remove J 45268 - 103.
18. Install new seal washers. Refer to Sealing Washer Replacement (Sealing Washer Replacement).
19. Inspect the TXV for debris. Clean or replace as needed.
20. Install the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement (Service and Repair).
21. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
22. Leak test the fittings using J 42220 .

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