Flushing

FLUSHING

TOOLS REQUIRED
- J 43600 ACR 2000 Air Conditioning Service Center
- J 45268 Flush Adapter Kit
- J 41447 Leak Detection Dye
- J 42220 Universal 12V Leak Detection Lamp

IMPORTANT: Flushing with the J 43600 is not intended to remove metal from the A/C system.

Flushing is intended to remove the following contaminants:
- Contaminated polyalkylene glycol (PAG) oil
- Desiccant, following a desiccant bag failure
- Overcharge of PAG oil
- Refrigerant contamination

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.

IMPORTANT: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.

2. Remove the thermal expansion valve (TXV).
3. Install the J 45268-103 in place of the TXV.
4. Remove the auxiliary TXV.
5. Install J 45268-107 in place of the auxiliary TXV.
6. Remove the A/C compressor.
7. Install J 45268-5 to the discharge hose.
8. Install J 45268-4 to the suction hose.




9. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.Perform the following procedure:
1. Service the filter with ACDelco P/N GF 470 before each flush.

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

2. Connect J 45268-1 to the suction port of J 45268-4.
3. Connect the blue hose from J 43600 to J 45268-1 flush filter adapter.
4. Connect the red hose from J 43600 to J 45268-5 flush adapter.
10. Reverse flow refrigerant flushing is recommended for desiccant bag failure. Replace the receiver dehydrator when the A/C flush is complete and perform the following procedure:
1. Service the filter with ACDelco P/N GF 470 before each flush.

IMPORTANT: The filter inside J 45268-1 is serviceable.

2. Connect J 45268-1 to the discharge port of J 45268-5.
3. Connect the blue hose from J 43600 to J 45268-1 flush filter adapter.
4. Connect the red hose from J 43600 to the suction port of J 45268-4 flush adapter.
11. Flush the front A/C system. Follow the instructions supplied with the J 43600.

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

12. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately.
1. Remove J 45268-107 from the auxiliary evaporator core.
2. Remove J 45268-103.
3. Install J 45268-103 to the auxiliary evaporator core.
4. Install J 45268-107.

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

13. Flush the auxiliary A/C system. Follow the instructions supplied with J 43600.
14. Remove J 45268-5 from the discharge hose.
15. Remove J 45268-4 from the suction hose.
16. If the removed A/C compressor is being reinstalled, perform the following procedure:
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. Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities.

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.

17. If you will replace the A/C compressor after flushing the system, perform the following procedure:
1. A new service compressor is shipped with PAG oil. Refer to the Refrigerant System Capacities.
2. If the service compressor is shipped with PAG oil, DO NOT drain the new PAG oil from the compressor.
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. Add the calculated amount to the compressor, as needed.

18. Add one bottle of J 41447 directly to the A/C compressor.

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

19. Install the A/C compressor.
20. Remove J 45268-103.
21. Inspect the TXV for debris. Clean or replace as needed.
22. Install the auxiliary TXV.
23. Remove J 45268-107.
24. Inspect the TXV for debris. Clean or replace as needed.
25. Install the TXV.
26. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
27. Leak test the fittings using J 42220.