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 the 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 AC Delco P/N GF 470, before each flush.

Connect the J 45268-1 flush filter to the suction port of the J 45268-3 flush adapter.

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

6.3.	Connect the red hose from the J 43600 to the 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 AC Delco P/N GF 470, before each flush.

7.2.	Connect the J 45268-1 flush filter to the discharge port of the J 45268-3 flush adapter.

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

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

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

8. Flush the A/C system. Follow the instructions supplied with the J 43600 .
9. Remove the J 45268-3 from the A/C compressor hose assembly.

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

•	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.

Notice: Refer to Fastener Notice in the Preface section.

•	Install the A/C compressor drain plug.

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

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

•	Add one bottle of J 41447 .

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

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

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

•	Add one bottle of J 41447 .

12. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
13. Inspect the orifice tube for debris. Clean or replace as needed. Refer to Expansion (Orifice) Tube Replacement .
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 .
16. Leak test the fittings using the J 42220 .