Heating, Ventilation and Air Conditioning: Maintenance GMC Acadia I рестайлинг

Flushing

Tools Required

1. J 43600 ACR 2000 Air Conditioning Service Center
2. J 45268 A/C Flushing Adapter Kit
3. J 41447 Leak Detection Dye
4. J 42220 R-134A A/C Tracer Dye - Box of 24

Flushing is intended to remove the following contaminants

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

Scheme 73

1. Recover the refrigerant. Refer to «Refrigerant Recovery and Recharging»(ref-610057-S29818155892014042100000) . IMPORTANT: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.
2. Remove the front thermal expansion valve (TXV). Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-610057-S34303812262014042100000) .
3. Install the J 45268-121 in place of the TXV.
4. Remove the A/C compressor. Refer to «Air Conditioning Compressor Replacement»(ref-610057-S38676264452014042100000) .
5. Install J 45268-5 to the discharge hose.
6. Install J 45268-4 to the suction hose.
7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure: Service the filter with ACDelco P/N GF 470 before each flush. IMPORTANT: The filter inside J 45268-1 is serviceable. Remove and discard the check valve from the filter. Connect J 45268-1 to the suction port of J 45268-4. Connect the blue hose from J 43600 ACR 2000 air conditioning service center to J 45268-1 flush filter adapter. Connect the red hose from J 43600 ACR 2000 air conditioning service center to J 45268-5 flush adapter.
8. Reverse flow refrigerant flushing is recommended for desiccant failure. Replace the desiccant when the A/C flush is complete and perform the following procedure: Service the filter with ACDelco P/N GF 470 before each flush. IMPORTANT: The filter inside J 45268-1 is serviceable. Connect J 45268-1 to the discharge port of J 45268-5. Connect the blue hose from J 43600 ACR 2000 air conditioning service center to J 45268-1 flush filter adapter. Connect the red hose from J 43600 ACR 2000 air conditioning service center to the suction port of J 45268-4 flush adapter.
9. Flush the front A/C system. Follow the instructions supplied with the J 43600 ACR 2000 air conditioning service center. IMPORTANT: Close the valve on the external refrigerant tank before starting the flush process.
10. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately. IMPORTANT: Flush the front A/C system before flushing the auxiliary A/C system. Remove J 45268-121 from the front evaporator. Inspect the front TXV for debris. Clean or replace as needed. Install the front TXV. Refer to «Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-610057-S34303812262014042100000) . Install J 45268-121 in place of the auxiliary TXV.
11. Flush the auxiliary A/C system. Follow the instructions supplied with J 43600 ACR 2000 air conditioning service center.
12. Remove J 45268-5 from the discharge hose.
13. Remove J 45268-4 from the suction hose.
14. If the removed A/C compressor is being reinstalled, perform the following procedure: 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. 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 A/C compressor. Refer to «Refrigerant System Specifications»(ref-610057-S20679220612014042100000) .
15. If you will replace the A/C compressor after flushing the system, perform the following procedure: A new service compressor is shipped with PAG oil. Refer to the «Refrigerant System Specifications»(ref-610057-S20679220612014042100000) . 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-610057-S20679220612014042100000) . Add the calculated amount to the compressor, as needed.
16. Add one bottle of J 41447 leak detection dye directly to the A/C compressor. IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.
17. Install the A/C compressor. Refer to «Air Conditioning Compressor Replacement»(ref-610057-S38676264452014042100000) .
18. Remove J 45268-121.
19. Inspect the auxiliary TXV for debris. Clean or replace as needed.
20. Install the auxiliary TXV. Refer to «Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement»(ref-610057-S38069904652014042100000) .
21. Evacuate and recharge the A/C system. Refer to «Refrigerant Recovery and Recharging»(ref-610057-S29818155892014042100000) .
22. Leak test the fittings using J 42220 R-134A A/C Tracer Dye - Box of 24.

Scheme 74

1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container. IMPORTANT: Drain and measure as much of the refrigerant oil as possible from the removed compressor. 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. Inspect the oil drained from the compressor. Refer to «Air Conditioning Compressor Oil Diagnosis»(ref-610057-S11077083502014042100000) .
4. Properly discard the used refrigerant oil.

Scheme 75

1. The replacement compressor is shipped with 74 ml (2.5 oz) of refrigerant oil. IMPORTANT: The refrigerant oil in the A/C system must be balanced during compressor replacement.
2. Compare the amount of refrigerant oil recorded during compressor removal to the amount of refrigerant oil shipped in the replacement compressor. If the amount of refrigerant oil drained and recorded from the removed compressor is: Less than 74 ml (2.5 oz) Leave the 74 ml (2.5 oz) in the replacement compressor. More than 74 ml (2.5 oz) Add to the compressor the difference between the 74 ml (2.5 oz) and the amount drained.

Scheme 76

Air Conditioning Compressor Replacement

Scheme 77

Air Conditioning Clutch Assembly Replacement

Scheme 78

1. Install the air conditioning clutch plate assembly (2).
2. Measure the air gap between the pulley and the drive plate. Adjust the shims (3) to achieve a 0.21-0.55 mm (0.008-0.022 in) air gap. NOTE: Ensure the drive plate does not drag against the pulley when the pulley is rotated.
3. Install the air conditioning compressor clutch pulley bolt (1) and tighten to 18 N.m (13 lb ft). CAUTION: Refer to «Fastener Caution»(ref-610030-S34989781762014042100000) .

Scheme 79

1. Remove the seal washer from the A/C refrigerant component.
2. Inspect the seal washer for any signs of damage.
3. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.
4. Discard the sealing washer. IMPORTANT: DO NOT reuse sealing washer.