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Home/Saab/9-7X/Saab 9-7X I (2005-2009)/Repair manual/Automatic HVAC System/Heating, Ventilation, and Air Conditioning: Maintenance
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Heating, Ventilation, and Air Conditioning: Maintenance Saab 9-7X I

Automatic HVAC System 2 illustrations ~610 words

Flushing

Tools Required

  1. J 41447 Leak Detection Dye. See «Special Tools»(ref-268096-S29609511412007101800000) .
  2. J 42220 Universal 12V Leak Detection Lamp. See «Special Tools»(ref-268096-S29609511412007101800000) .
  3. J 43600 ACR 2000 Refrigerant Station. See «Special Tools»(ref-268096-S29609511412007101800000) .
  4. J 45268 Flush Adapter Kit. See «Special Tools»(ref-268096-S29609511412007101800000) .
IMPORTANTFlushing is not intended to remove metal from the A/C system.

Flushing is intended to remove the following

  1. Contaminated PAG oil
  2. Desiccant, following a desiccant bag failure
  3. Overcharge of PAG oil
  4. Refrigerant contamination
IMPORTANTWarmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.

Scheme 95

Scheme 95
Scheme 95
  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(ref-268096-S34829348672007101800000) .
  2. Remove the orifice tube. Refer to «Expansion (Orifice) Tube Replacement»(ref-268096-S11927095962007101800000) .
  3. Connect the A/C lines with the orifice tube removed.
  4. Remove the A/C compressor. Refer to «Compressor Replacement (LH6)»(ref-268096-S29257340312007101800000) or «Compressor Replacement (LL8)»(ref-268096-S34425957682007101800000) .
  5. Install J 45268 -3 to the A/C compressor hose assembly. See «Special Tools»(ref-268096-S29609511412007101800000) .
  6. 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. See «Special Tools»(ref-268096-S29609511412007101800000) . Remove and discard the check valve from the filter. Service the filter with ACDelco P/N GF 470, before each flush. Connect J 45268 -1 flush filter to the suction port of the J 45268 -3 flush adapter. See «Special Tools»(ref-268096-S29609511412007101800000) . Connect the blue hose from the J 43600 to J 45268 -1 flush filter adapter. See «Special Tools»(ref-268096-S29609511412007101800000) . Connect the red hose from the J 43600 to J 45268 -3. See «Special Tools»(ref-268096-S29609511412007101800000) .
  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. Service the filter with ACDelco P/N GF 470, before each flush. Connect the J 45268-1 flush filter to the discharge port of J 45268 -3 flush adapter. See «Special Tools»(ref-268096-S29609511412007101800000) . Connect the blue hose from J 43600 to J 45268 -1 flush filter adapter. See «Special Tools»(ref-268096-S29609511412007101800000) . Connect the red hose from J 43600 to the suction port of J 45268 -3. See «Special Tools»(ref-268096-S29609511412007101800000) . 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 . See «Special Tools»(ref-268096-S29609511412007101800000) .
  9. Remove the J 45268 -3 from the A/C compressor hose assembly. See «Special Tools»(ref-268096-S29609511412007101800000) . 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»(ref-268096-S08144962772007101800000) . IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.
  12. Add one bottle of J 41447 directly to the A/C Compressor. See «Special Tools»(ref-268096-S29609511412007101800000) .
  13. Install the A/C compressor. Refer to «Compressor Replacement (LH6)»(ref-268096-S29257340312007101800000) or «Compressor Replacement (LL8)»(ref-268096-S34425957682007101800000) .
  14. Inspect the orifice tube for debris. Clean or replace as needed.
  15. Install the orifice tube. Refer to «Expansion (Orifice) Tube Replacement»(ref-268096-S11927095962007101800000) .
  16. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(ref-268096-S34829348672007101800000) .
  17. Leak test the fittings using the J 42220 . See «Special Tools»(ref-268096-S29609511412007101800000) .

Draining Procedure

IMPORTANTDrain and measure as much of the refrigerant oil as possible from the removed compressor.

Scheme 96

Scheme 96
Scheme 96
  1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container. Rotate the compressor shaft to assist in draining the compressor.
  2. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
  3. Properly discard the used refrigerant oil.

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