Flushing Front Only System

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 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 ACDelco P/N GF 470, before each flush.

Connect J 45268-1 to the suction port of J 45268-4 flush adapter.

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

6.3.	Connect the red hose from J 43600 to J 45268-5.

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.

7.2.	Connect J 45268-1 to the discharge port of J 45268-5.

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

7.4.	Connect the red hose from J 43600 to the suction port of J 45268-4.

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

8. Flush the front A/C system. Follow the instructions supplied with the J 43600 .
9. Remove J 45268-4 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:

10.1.

Remove the A/C compressor drain plug.

10.2.

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.

10.3.

Install the A/C compressor drain plug.

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

10.4.

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:

11.1.

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

11.2.

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

11.3.

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 .

11.4.

Add the calculated amount to the compressor, as needed.

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

12. Add one bottle of J 41447 directly to the A/C compressor.
13. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
14. Inspect the orifice tube for debris. Clean or replace as needed.
15. Install the orifice tube. Refer to Expansion (Orifice) Tube Replacement .
16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
17. Leak test the fittings using J 42220 .

Flushing Auxiliary System

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 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. Inspect the end of the suction hose for a suction screen.
6. Remove the suction screen, if installed.
7. Install J 45268 -2 to the A/C compressor hose assembly.



8. 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.

8.1.	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 -2 flush adapter.

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

8.3.	Connect the red hose from J 43600 to J 45268 -2 flush adapter.

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

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

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

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

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

9.4.	Connect the red hose from J 43600 to the suction port of J 45268 -2 flush adapter.

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

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

Important: Flush the front A/C system before flushing the auxiliary A/C system.

11. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately.



12. Cut the orifice tube frame and screen, enough to access the end of the orifice tube. Pinch off the orifice tube.




Important: Pinch off the orifice tube in order to prevent refrigerant flow to the front system during the auxiliary system flush.

13. Install the pinched orifice tube. Refer to Expansion (Orifice) Tube Replacement .
14. Remove the auxiliary TXV. Refer to Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement .
15. Install J 45268 -108.

Important: The auxiliary evaporator core can be flushed without totally reassembling into the auxiliary HVAC module.

16. Install the auxiliary evaporator core to the A/C lines.
17. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
18. Connect the auxiliary A/C lines to the auxiliary evaporator core.
19. Lower the vehicle.
20. Flush the auxiliary A/C system. Follow the instructions supplied with the J 43600 .
21. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
22. Remove the auxiliary A/C lines from the auxiliary evaporator core.
23. Lower the vehicle.
24. Remove J 45268 -108.
25. Inspect the TXV for debris.

Clean or replace as needed.

26. Install the auxiliary TXV. Refer to Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement .
27. Remove J 45268 -2 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.
28. If the removed A/C compressor is being reinstalled, perform the following procedure:

28.1.

Remove the A/C compressor drain plug.

28.2.

Drain the PAG oil from the A/C compressor.

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

28.3.

Install the A/C compressor drain plug.

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

28.4.

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

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

29.1.

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

29.2.

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

29.3.

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 .

29.4.

Add the calculated amount to the compressor, as needed.

29.5.

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 .

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

30. Add one bottle of J 41447 directly to the A/C compressor.
31. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
32. Install a new orifice tube. Refer to Expansion (Orifice) Tube Replacement .
33. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
34. Leak test the fittings using J 42220 .