Flushing

Flushing

Tools Required

* J43600 ACR 2000 Air Conditioning Service Center
* J45268 Flush Adapter Kit
* J41447 R134A A/C Tracer Dye - Box of 24
* J42220 Universal 12V Leak Detection Lamp

Important: 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

Important: 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.
2. Remove the thermal expansion valve (TXV).
3. Install the stud for the J45268 kit onto the J45268-115.
4. Install the J45268-115 in place of the TXV.

Notice: Refer to Fastener Notice.

5. Install the TXV mounting bolts.

Tighten the bolts to 7 N.m (62 lb in).

6. Connect the evaporator line to the J45268-115.
7. Install the TXV block fitting nut.

Tighten the bolts to 27 N.m (20 lb ft).

8. Remove the A/C compressor.
9. Install J45268-10 to the A/C compressor hose assembly.
10. Install the nut and bolt from the J45268 kit to the J45268-10 and compressor hose assembly.

Tighten the bolts to 27 N.m (20 lb ft).

11. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.
Perform the following procedure:






Important: The filter inside J45268-1 is serviceable. Remove and discard the check valve from the filter.

1. Service the filter with ACDelco P/N GF 470, before each flush.
2. Install the port plugs J45268-9 onto the J45268-10.
3. Install the fitting J45268-7 onto the J45268-10.
4. Install the fitting J45268-8 onto the J45268-10.
5. Connect J45268-1 flush filter to the suction port of J45268-7 flush adapter.
6. Connect the blue hose from the J43600 to the J45268-1 flush filter adapter.
7. Connect the red hose from the J43600 to the J45268-8 flush adapter.

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:

Important: The filter inside J45268-1 is serviceable. Remove and discard the check valve from the filter.

1. Service the filter with ACDelco P/N GF 470, before each flush.
2. Install the port plugs J45268-9 onto the J45268-10.
3. Install the fitting J45268-7 onto the J45268-10.
4. Install the fitting J45268-8 onto the J45268-10.
5. Connect J45268-1 flush filter to the discharge port of J45268-7 flush adapter.
6. Connect the blue hose from J43600 to the J45268-1 flush filter adapter.
7. Connect the red hose from J43600 to the J45268-8 flush adapter.

Important: 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 J43600.
14. Disconnect the red hose on the J43600 from the J45268-10.
15. Disconnect the blue hose on the J43600 from the J45268-1.
16. Remove J45268-1 from the J45268-10.
17. Remove the J45268-10 from the A/C compressor hose assembly.

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.

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.

Tighten the drain plug to 16 N.m (12 lb ft).

Important: Flushing will remove the fluorescent leak detection dye from the A/C system.

4. Add one bottle of J41447.
5. Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities.

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 Capacities.
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 Capacities.
4. Add the calculated amount to the compressor, as needed.

Important: Flushing will remove the fluorescent leak detection dye from the A/C system.

5. Add one bottle of J41447.

20. Install the A/C compressor.
21. Remove J45268-115.
22. Inspect the TXV for debris. Clean or replace as needed.
23. Install the TXV.
24. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
25. Leak test the fittings using J42220.