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:

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. Refer to Expansion (Orifice) Tube Replacement .
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
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.

6.1.	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 -3 flush adapter.

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

6.3.	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 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 the discharge port of J 45268 -3 flush adapter.

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

7.3.	Connect the red hose from the J 43600 to the suction port of J 45268 -3.

8. Flush the A/C system. Follow the instructions supplied with the J 43600 .

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

Notice: Refer to Fastener Notice in the Preface section.

9. Remove J 45268 -3 from the A/C compressor hose assembly.

•	Remove the A/C compressor drain plug.

•	Drain the PAG oil from the A/C compressor.

•	Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.

•	Install the A/C compressor drain plug.

Tighten
Tighten the drain plug to 20 N·m (15 lb ft).

10. If replacing the A/C compressor after flushing the system, perform the following:

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

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

•	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.

•	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 .

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

11. Add one bottle of J 41447 directly to the A/C compressor.
12. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
13. Inspect the orifice tube for debris.

Clean or replace as needed.

14. Install the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
15. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

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

16. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities .
17. Leak test the fittings using J 42220 .