Tools Required

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:

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 the J 45268-113.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
5. Install the J 45268-4 to the suction hose.
6. Install the J 45268-5 to the discharge 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.

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

Connect J 45268-1 flush filter to the J 45268-4 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 J 45268-5.

8. 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.

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

8.2.	Connect J 45268-1 flush filter to the J 45268-5 flush adapter.

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

8.4.	Connect the red hose from J 43600 to the J 45268-4.

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

9. Flush the A/C system. Follow the instructions supplied with the J 43600 .
10. Remove the J 45268-5 from the discharge hose.
11. Remove the J 45268-4 from the suction hose.

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.
12. If the removed A/C compressor will be reinstalled, perform the following procedure:

12.1.

Drain the PAG oil from the A/C compressor.

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

12.2.

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

13. If the A/C compressor will be replaced after flushing the system, refer to Air Conditioning Compressor Oil Balancing .

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

14. Add one bottle of J 41447 directly to the A/C compressor.
15. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
16. Inspect the TXV for debris. Clean or replace as needed.
17. Install the TXV. Refer to Thermal Expansion Valve Replacement .
18. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
19. Leak test the fittings using J 42220 .