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Heating, Ventilation, and Air Conditioning: Maintenance GMC Terrain I

Automatic HVAC System ~640 words

Forward Flushing Setup

  1. Install both J 45268-9 (2) onto the J 45268-10 (3).
  2. Install the J 45268-7 (4) onto the suction side of the J 45268-10 (3).
  3. Install the J 45268-8 (1) onto the discharge side of the J 45268-10 (3).

Reverse Flushing Setup

  1. Install both J 45268-9 (2) onto the J 45268-10 (3).
  2. Install the J 45268-8 (1) onto the suction side of the J 45268-10 (3).
  3. Install the J 45268-7 (4) onto the discharge side of the J 45268-10 (3).

Flush Procedure

  1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(ref-491156-S07584046762012073000000) .
  2. Remove the TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-491156-S15778650882012073000000) .
  3. Install the stud onto the J 45268-115.
  4. Install new sealing washers onto the evaporator core. Refer to «Air Conditioning System Seal Replacement»(ref-491156-S32751145912012073000000) .
  5. Install J 45268-115 in place of the TXV.
  6. Install TXV mounting bolts and tighten to 7 N.m (62 lb in).
  7. Install new washers onto the rear evaporator line assembly. Refer to «Air Conditioning System Seal Replacement»(ref-491156-S32751145912012073000000) .
  8. Connect the rear evaporator line assembly to the J 45268-115.
  9. Install the TXV block fitting nut and tighten to 20 N.m (15 lb ft).
  10. Remove the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LEA)»(ref-491156-S07416817082012073000000) , «Air Conditioning Compressor Replacement (LFW)»(ref-491156-S03068389742012073000000) .
  11. Service the filter with ACDelco P/N GF 470, before each flush.
  12. Install the J 45268-10 to the compressor hose assembly.
  13. Connect the J 45268-1 flush filter to the J 45268-7 flush adapter.
  14. Connect the blue hose from the J 43600 ACR 2000 Air Conditioning Service Center to J 45268-1 flush filter adapter.
  15. Connect the red hose from the J 43600 ACR 2000 Air Conditioning Service Center to J 45268-8 flush adapter.
  16. Flush the A/C system. Follow the instructions supplied with the J 43600 ACR 2000 Air Conditioning Service Center.
  17. Disconnect the red hose from the J 43600 ACR 2000 Air Conditioning Service Center to J 45268-8 flush adapter.
  18. Disconnect the blue hose from the J 43600 ACR 2000 Air Conditioning Service Center to J 45268-1 flush filter adapter.
  19. Disconnect the J 45268-1 flush filter from the J 45268-10 flush adapter.
  20. Remove the J 45268-10 from the compressor hose assembly.
  21. If you will reinstall the removed A/C compressor, perform the following procedure: Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor. Add the total system capacity of PAG oil to the crankcase of the A/C compressor. Refer to «Refrigerant System Specifications»(ref-491156-S33687290622012073000000) . NOTE: Flushing will remove the fluorescent leak detection dye from the A/C system. Add one bottle of J 41447 R-134A A/C Tracer Dye - Box of 24 directly to the A/C compressor.
  22. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement (LEA)»(ref-491156-S07416817082012073000000) , «Air Conditioning Compressor Replacement (LFW)»(ref-491156-S03068389742012073000000) .
  23. Remove the TXV block fitting nut.
  24. Disconnect the rear evaporator line assembly from the J 45268-115.
  25. Remove the TXV bolts retaining the J 45268-115.
  26. Remove the J 45268-115.
  27. Inspect the TXV for debris. Clean or replace as needed.
  28. Install the TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-491156-S15778650882012073000000) .
  29. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(ref-491156-S07584046762012073000000) .
  30. Leak test the fittings using J 42220 Universal 12V Leak Detection Lamp.

Draining Procedure

  1. Remove the compressor crankcase oil drain plug and drain the crankcase into a clean, graduated container.
  2. Drain the oil from both the suction and discharge ports of the removed compressor (1) into the same container. Rotate the compressor shaft to assist in draining the compressor (1).
  3. Measure and record the amount of oil drained from the removed compressor (1). This measurement will be used during installation of the replacement compressor (1).
  4. Inspect oil drained from removed compressor (1). Refer to «Air Conditioning Compressor Oil Diagnosis»(ref-491156-S31108461202012073000000) .
  5. Properly discard the used refrigerant oil.

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