Flushing

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 12 V Leak Detection Lamp

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




1. Flushing is intended to remove the following:
^ 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.

2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
3. Remove the orifice tube.
4. Connect the A/C lines with the orifice tube removed.
5. Remove the A/C compressor.
6. Install the J 45268-3 to the A/C compressor hose assembly.
7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.
Perform the following procedure:

IMPORTANT: The filter inside the 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 the J 45268-1 flush filter to the suction port of the J 45268-3 flush adapter.
7.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
7.3. Connect the red hose from the J 43600 to the J 45268-3.
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 the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

8.1. Service the filter with AC P/N GF 470, before each flush.
Connect the J 45268-1 flush filter to the discharge port of the J 45268-3 flush adapter.
8.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
8.3. Connect the red hose from the J 43600 to the suction port of the J 45268-3.
9. Flush the A/C system. Follow the instructions supplied with the J 43600.
Close the valve on the external refrigerant tank, before starting the flush process.
10. Remove the J 45268-3 from the A/C compressor hose assembly.
11. Remove the A/C compressor drain plug.
12. Install the A/C compressor drain plug.

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

13. Install the A/C compressor.
14. Inspect the orifice tube for debris. Clean or replace as needed.
15. Install the orifice tube.
16. 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.

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

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

18. Add one bottle of J 41447 using the J 41459.
19. Leak test the fittings using the J 42220.