Flushing
Flushing
Special Tools
* GE-8800 - ACR 2000 Air Conditioning Service Center
* GE-45268 - Flush Adapter Kit
* GE-41447 - R134A A/C Tracer Dye - Box of 24
* GE-42220 - Universal 12V Leak Detection Lamp
For equivalent regional tools, Refer to Special Tools Heating, Ventilation, and Air Conditioning
Note:
Flushing with the ACR 2000 is not intended to remove metal from the A/C system.
Flushing is intended to remove the following:
* Contaminated polyalkylene glycol (PAG) oil
* Desiccant, following a desiccant bag failure
* Overcharge of PAG oil
* Refrigerant contamination
Note:
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 Refrigerant Recovery and Recharging.
2. Remove the thermal expansion valve (TXV). Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement Service and Repair.
3. Install the stud for the GE-45268 - Flush Adapter Kit kit onto the GE 45268-115.
4. Install the GE 45268-115 in place of the TXV.
Caution:
Refer to Fastener Caution Fastener Caution.
5. Install the TXV mounting bolts and tighten to 7 Nm (62 lb in).
6. Connect the evaporator line to the GE 45268-115.
7. Install the TXV block fitting nut and tighten to 27 Nm (20 lb ft).
8. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement (L4) Air Conditioning Compressor Replacement (L4)Air Conditioning Compressor Replacement (V6) Air Conditioning Compressor Replacement (V6).
9. Install GE 45268-10 to the A/C compressor hose assembly.
10. Install the nut and bolt from the GE-45268 - Flush Adapter Kit kit to the GE 45268-10 and compressor hose assembly.
Tighten the bolts to 27 Nm (20 lb ft).
Note:
The filter inside GE 45268-1 is serviceable. Remove and discard the check valve from the filter.
11. 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.
2. Install the port plugs GE 45268-9 onto the GE 45268-10.
3. Install the fitting GE 45268-7 onto the GE 45268-10.
4. Install the fitting GE 45268-8 onto the GE 45268-10.
5. Connect GE 45268-1 flush filter to the suction port of GE 45268-7 flush adapter.
6. Connect the blue hose from the GE-8800 - ACR 2000 Air Conditioning Service Center to the GE 45268-1 flush filter adapter.
7. Connect the red hose from the GE-8800 - ACR 2000 Air Conditioning Service Center to the GE 45268-8 flush adapter.
Note:
The filter inside GE 45268-1 is serviceable. Remove and discard the check valve from the filter.
12. 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:
1. Service the filter with ACDelco P/N GF 470, before each flush.
2. Install the port plugs GE 45268-9 onto the GE 45268-10.
3. Install the fitting GE 45268-7 onto the GE 45268-10.
4. Install the fitting GE 45268-8 onto the GE 45268-10.
5. Connect GE 45268-1 flush filter to the discharge port of GE 45268-7 flush adapter.
6. Connect the blue hose from GE-8800 - ACR 2000 Air Conditioning Service Center to the GE 45268-1 flush filter adapter.
7. Connect the red hose from GE-8800 - ACR 2000 Air Conditioning Service Center to the GE 45268-8 flush adapter.
Note:
Close the valve on the external refrigerant tank, before starting the flush process.
13. Flush the A/C system. Follow the instructions supplied with the GE-8800 - ACR 2000 Air Conditioning Service Center.
14. Disconnect the red hose on the GE-8800 - ACR 2000 Air Conditioning Service Center from the GE 45268-10.
15. Disconnect the blue hose on the GE-8800 - ACR 2000 Air Conditioning Service Center from the GE 45268-1.
16. Remove GE 45268-1 from the GE 45268-10.
17. Remove the GE 45268-10 from the A/C compressor hose assembly.
Caution:
Refer to Component Fastener Tightening Caution Component Fastener Tightening Caution.
Note:
Flushing will remove the fluorescent leak detection dye from the A/C system.
Note:
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.
18. If you will reinstall the removed A/C compressor, perform the following procedure:
1. Remove the A/C compressor drain plug.
2. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
3. Install the A/C compressor drain plug and tighten to 16 Nm (12 lb ft).
4. Add one bottle of GE-41447 - R134A A/C Tracer Dye - Box of 24.
5. Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Specifications Specifications.
Note:
Flushing will remove the fluorescent leak detection dye from the A/C system.
19. If you will replace the A/C compressor after flushing the system, perform the following procedure:
1. Determine if the new service compressor is shipped with PAG oil. Refer to the Refrigerant System Specifications Specifications.
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 Specifications Specifications.
4. Add the calculated amount to the compressor, as needed.
5. Add one bottle of GE-41447 - R134A A/C Tracer Dye - Box of 24.
20. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement (L4) Air Conditioning Compressor Replacement (L4)Air Conditioning Compressor Replacement (V6) Air Conditioning Compressor Replacement (V6).
21. Remove GE 45268-115.
22. Inspect the TXV for debris. Clean or replace as needed.
23. Install the TXV. Refer to Air Conditioning Evaporator Thermal Expansion Valve Replacement Service and Repair.
24. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.
25. Leak test the fittings using GE-42220 - Universal 12V Leak Detection Lamp.