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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 (Non HP2) (Refrigerant Recovery and Recharging (Non HP2)) .
2. Remove the TXV. Refer to Thermal Expansion Valve Replacement (Service and Repair) .
3. Install J 45268 - 103.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement (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 (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 Thermal Expansion Valve Replacement (Service and Repair) .
21. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging (Non HP2) (Refrigerant Recovery and Recharging (Non HP2)) .
22. Leak test the fittings using J 42220.

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