Tools Required

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:

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 A/C compressor. Refer to Air Conditioning Compressor Replacement .
3. Install J 45268 - 5 to the discharge hose.
4. Install J 45268 - 4 to the suction hose.
5. Remove the orifice solenoid. Refer to Orifice Solenoid Replacement .
6. Install J 45268 - 106 in place of the orifice solenoid.



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.

7.1.	Service the filter with ACDelco P/N GF 470, before each flush.

Connect J 45268 - 1 flush filter to J 45268 - 4 flush adapter.

7.2.	Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.

7.3.	Connect the red hose from J 43600 to J 45268 - 5 flush adapter.

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

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

8.1.	Service the filter with ACDelco P/N GF 470, before each flush.

8.2.	Connect J 45268 - 1 flush filter to J 45268 - 5 flush adapter.

8.3.	Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.

8.4.	Connect the red hose from J 43600 to J 45268 - 4 flush adapter.

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

9. Flush the A/C system. Follow the instructions supplied with J 43600 .
10. Remove J 45268 - 106.

Important: Lubricate the new expansion tube O-rings with mineral base 525 viscosity refrigerant oil before installing into the evaporator hose.

11. Install new O-rings.
12. Inspect the orifice solenoid screen for debris. Clean or replace as needed.
13. Install the orifice solenoid. Refer to Orifice Solenoid Replacement .
14. Remove J 45268 - 4 from the suction hose.
15. Remove J 45268 - 5 from the discharge hose.
16. Remove J 45268 - 1 from J 43600 .

Important: Flushing will remove all the PAG oil from the A/C system. Replenish the A/C system with the correct amount of PAG oil.

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

17.1.

Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.

17.2.

Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities .

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

18.1.

Determine if the new service compressor is shipped with PAG oil. Refer to the Refrigerant System Capacities .

18.2.

If the service compressor is shipped with PAG oil, Do NOT drain the new PAG oil from the compressor.

18.3.

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 .

18.4.

Add the calculated amount to the compressor, as needed.

18.5.

If the service compressor is shipped dry, no calculation is required. Add the total system capacity of PAG oil to the compressor. Refer to Refrigerant System Capacities .

19. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
20. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

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

21. Add one bottle of J 41447 using J 41459 .
22. Leak test the fittings using J 42220 .