Flushing (Non HP2)
Flushing (Non HP2)
Special Tools
* J 41447 Leak Detection Dye
* J 42220 Universal 12V Leak Detection Lamp
* J 43600 ACR 2000 Refrigerant Station
* J 45268 Flush Adapter Kit
Important: Flushing is not intended to remove metal from the A/C system.
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.
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Non-HP2) (Refrigerant Recovery and Recharging)Refrigerant Recovery and Recharging (HP2) (Refrigerant Recovery and Recharging) .
2. Remove the orifice tube. Refer to Expansion (Orifice) Tube Replacement (Service and Repair) .
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement (LLY/LMM) (Service and Repair)Air Conditioning Compressor Replacement (LU3) (Service and Repair)Air Conditioning Compressor Replacement (LY2, LY5, LH6, L76, L92 and LMG) (Service and Repair)Air Conditioning Compressor Replacement (HP2) (Service and Repair) .
5. InstallJ 45268 -3 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 insideJ 45268 -1 is serviceable. Remove and discard the check valve from the filter.
1. Service the filter with ACDelco P/N GF 470, before each flush.
ConnectJ 45268 -1 flush filter to the suction port of the J 45268 -3 flush adapter.
2. Connect the blue hose from the J 43600 toJ 45268 -1 flush filter adapter.
3. Connect the red hose from the J 43600 toJ 45268 -3.
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 the J 45268-1 is serviceable. Remove and discard the check valve from the filter.
1. Service the filter with ACDelco P/N GF 470, before each flush.
Connect the J 45268-1 flush filter to the discharge port ofJ 45268 -3 flush adapter.
2. Connect the blue hose fromJ 43600 toJ 45268 -1 flush filter adapter.
3. Connect the red hose fromJ 43600 to the suction port ofJ 45268 -3.
Important: Close the valve on the external refrigerant tank, before starting the flush process.
8. Flush the A/C system. Follow the instructions supplied with the J 43600 .
9. Remove the J 45268 -3 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. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
11. Add back the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities (Non-HP2) ([1][2]Capacity Specifications) .
Important: Flushing will remove the fluorescent leak detection dye from the A/C system.
12. Add one bottle ofJ 41447 directly to the A/C Compressor.
13. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement (LLY/LMM) (Service and Repair)Air Conditioning Compressor Replacement (LU3) (Service and Repair)Air Conditioning Compressor Replacement (LY2, LY5, LH6, L76, L92 and LMG) (Service and Repair)Air Conditioning Compressor Replacement (HP2) (Service and Repair) .
14. Inspect the orifice tube for debris. Clean or replace as needed.
15. Install the orifice tube. Refer to Expansion (Orifice) Tube Replacement (Service and Repair) .
16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging (Non-HP2) (Refrigerant Recovery and Recharging)Refrigerant Recovery and Recharging (HP2) (Refrigerant Recovery and Recharging) .
17. Leak test the fittings using the J 42220 .