Heating, Ventilation, and Air Conditioning: Maintenance Cadillac SRX II facelift

Flushing

Special Tools

1. GE-8800 ACR 2000 Air Conditioning Service Center
2. GE-45268 Flush Adapter Kit
3. GE-41447 Leak Detection Dye
4. GE-42220 Universal 12V Leak Detection Lamp

For equivalent regional tools. Refer to Special Tools

Note. Flushing with the GE-8800 ACR 2000 Air Conditioning Service Center is not intended to remove metal from the A/C system.

Flushing is intended to remove the following

1. Contaminated polyalkylene glycol (PAG) oil
2. Desiccant, following a desiccant bag failure
3. Overcharge of PAG oil
4. Refrigerant contamination

Scheme 33

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging (Belt Driven Compressor)»(ref-644713-S28190511042014072300000)
2. Remove the thermal expansion valve (TXV). Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-644713-S26667662992014072300000)
3. Install the stud for the GE 45268 Flush Adapter Kit onto the GE 45268-121.
4. Install the GE 45268-121 in place of the TXV.
5. Install the TXV mounting bolts. Tighten Tighten the bolts to 7 N.m (62 lb in).
6. Connect the evaporator line to the GE 45268-121.
7. Install the TXV block fitting nut. Tighten Tighten the bolts to 17 N.m (12.5 lb ft).
8. Remove the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LFX)»(ref-644713-S12039392012014072300000)
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 to the GE 45268-10 and compressor hose assembly. Tighten Tighten the bolts to 17 N.m (12.5 lb ft).
11. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure: NOTE: The filter inside GE 45268-1 is serviceable. Remove and discard the check valve from the filter. Service the filter with ACDelco P/N GF 470, before each flush. Install the port plugs GE 45268-9 onto the GE 45268-10. Install the fitting GE 45268-7 onto the GE 45268-10. Install the fitting GE 45268-8 onto the GE 45268-10. Connect GE 45268-1 flush filter to the suction port of GE 45268-7 flush adapter. Connect the blue hose from the GE 8800 ACR 2000 Air Conditioning Service Center to the GE 45268-1 flush filter adapter. Connect the red hose from the GE 8800 ACR 2000 Air Conditioning Service Center to the GE 45268-8 flush adapter.
12. Reverse flow refrigerant flush is recommended for desiccant bag failure. Replace the A/C condenser when the A/C flush is complete and perform the following procedure: NOTE: The filter inside GE 45268-1 is serviceable. Remove and discard the check valve from the filter. Service the filter with ACDelco P/N GF 470, before each flush. Install the port plugs GE 45268-9 onto the J 45268-10. Install the fitting GE 45268-7 onto the J 45268-10. Install the fitting GE 45268-8 onto the J 45268-10. Connect GE 45268-1 flush filter to the discharge port of GE 45268-7 flush adapter. Connect the blue hose from GE 8800 ACR 2000 Air Conditioning Service Center to the GE 45268-1 flush filter adapter. Connect the red hose from GE 8800 ACR 2000 Air Conditioning Service Center to the GE 45268-8 flush adapter.
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.
18. If you will reinstall the removed A/C compressor, perform the following procedure: Remove the A/C compressor drain plug. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. Install the A/C compressor drain plug. Tighten Tighten the drain plug to 16 N.m (12 lb ft). Add the total system capacity of PAG oil to the A/C compressor. Refer to «Refrigerant System Specifications»(ref-644713-S05991294922014072300000)
19. If you will replace the A/C compressor after flushing the system, perform the following procedure: Determine if the new service compressor is shipped with PAG oil. Refer to the «Refrigerant System Specifications»(ref-644713-S05991294922014072300000) If the service compressor is shipped with PAG oil, DO NOT drain the new PAG oil from the compressor. 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»(ref-644713-S05991294922014072300000) Add the calculated amount to the compressor, as needed.
20. Add one bottle of GE 41447 Leak Detection Dye directly to the A/C Compressor.
21. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LFX)»(ref-644713-S12039392012014072300000)
22. Remove GE 45268-121.
23. Inspect the TXV for debris. Clean or replace as needed.
24. Install the TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-644713-S26667662992014072300000)
25. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging (Belt Driven Compressor)»(ref-644713-S28190511042014072300000)
26. Leak test the fittings using GE 42220 Universal 12V Leak Detection Lamp.

Draining Procedure

1. Drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.
2. Rotate the compressor shaft to assist in draining the compressor.
3. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
4. Inspect oil drained from removed compressor. Refer to «Air Conditioning Compressor Oil Diagnosis»(ref-644713-S34909922982014072300000) .
5. Properly discard the used refrigerant oil.
6. Clean the graduated cylinder.
7. Drain bolt and drain the refrigerant oil from the crankcase and rear head ports into a clean, graduated container.
8. Rotate the compressor shaft to assist in draining the compressor.