Tools Required

• J 43600  Air Conditioning Service Center
• J 45268  Flush Adapter Kit
• J 41447  Leak Detection Dye
• J 41459  Leak Detection Dye Injector
• J 42220  Universal 12V Leak Detection Lamp

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:

• Contaminated PAG oil
• Desiccant, following a desiccant bag failure
• Overcharge of PAG oil
• Refrigerant contamination

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 TXV. Refer to THERMAL EXPANSION VALVE REPLACEMENT  .
3. Install J 45268  - 103.
4. Remove the A/C compressor. Refer to COMPRESSOR REPLACEMENT  .
5. Install J 45268  - 5 to the discharge hose.
6. Install J 45268  - 4 to the suction hose.
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.

   1. 7.1. Service the filter with ACDelco P/N GF 470, before each flush.
   2. 7.2. Connect J 45268  - 1 flush filter to the suction port of J 45268  - 4 flush adapter.
   3. 7.3. Connect the blue hose from J 43600  to J 45268  - 1 flush filter adapter.

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

8. Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace the receiver dehydrator when the A/C flush is complete and perform the following procedure:
   Fig 1: Identifying A/C Filter

   Courtesy of GENERAL MOTORS CORP.

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

   1. 8.1. 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  - 5 flush adapter.
   2. 8.2. Connect the blue hose from J 43600  to J 45268  - 1 flush filter adapter.
   3. 8.3. Connect the red hose from J 43600  to the suction port of J 45268  - 4 flush adapter.
9. 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.
10. Remove J 45268  - 4 from the suction hose.
11. Remove J 45268  - 5 from the discharge hose.
12. Remove J 45268  - 1 from J 43600. 

    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.

13. If you will reinstall the removed A/C compressor, perform the following procedure:
    1. 13.1. Drain the PAG oil from the A/C compressor.

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

    2. 13.2. Add the total system capacity of PAG oil to the A/C compressor. Refer to REFRIGERANT SYSTEM CAPACITIES  .
14. If you will replace the A/C compressor after flushing the system, perform the following procedure:
    1. 14.1. A new service compressor is shipped with PAG oil. Refer to the REFRIGERANT SYSTEM CAPACITIES  .
    2. 14.2. 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.
15. Install the A/C compressor. Refer to COMPRESSOR REPLACEMENT  .
16. Remove J 45268  - 103.
17. Install new seal washers. Refer to SEALING WASHER REPLACEMENT  .
18. Inspect the TXV for debris. Clean or replace as needed.
19. Install the TXV. Refer to THERMAL EXPANSION VALVE 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.