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 fluids:

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 -2 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 J 45268 -1 flush filter to the suction port of J 45268 -2 flush adapter.

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

6.3.	Connect the red hose from J 43600 to J 45268 -2.

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.

Connect J 45268 -1 flush filter to the discharge port of J 45268 -2 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 the suction port of J 45268 -2.

8. 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.

9. Remove J 45268 -2 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.

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.

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

Clean or replace as needed.

13. Install the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
14. 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.

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