Flushing

FLUSHING

TOOLS REQUIRED
- J 41447 Leak Detection Dye
- J 41459 Leak Detection Dye Injector
- J 42220 Universal 12V Leak Detection Lamp
- J 43600 ACR 2000 Air Conditioning Service Center
- J 45268 Flush Adapter Kit

IMPORTANT: Flushing with the ACR 2000 is not intended to remove metal from the A/C system.

Flushing is intended to remove the following contaminants:
- Contaminated 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.
2. Remove the orifice tube.
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor.
5. Install J45268-3 to the A/C compressor hose assembly.




6. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.
Perform the following procedure:
6.1. Service the filter with ACDelco P/N GF 470, before each flush.
Connect J45268-1 flush filter to the suction port of J45268-3 flush adapter.

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

6.2. Connect the blue hose from J43600 to J45268-1 flush filter adapter.
6.3. Connect the red hose from J43600 to J45268-3.
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:
7.1. Service the filter with ACDelco P/N GF 470, before each flush.

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

7.2. Connect J45268-1 flush filter to the discharge port of J45268-3 flush adapter.
7.3. Connect the blue hose from J43600 to J45268-1 flush filter adapter.
7.4. Connect the red hose from J43600 to the suction port of J45268-3.
8. Flush the A/C system. Follow the instructions supplied with the J43600.

IMPORTANT: Close the valve on the external refrigerant tank, before tarting the flush process.

9. Remove J45268-3 from the A/C compressor hose assembly.
10. If you will reinstall the removed A/C compressor, perform the following procedure:
10.1. Remove the A/C compressor drain plug.
10.2. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
10.3. Install the A/C compressor drain plug.

Tighten
Tighten the drain plug to 20 N.m (15 lb ft).

10.4. Add the total system capacity of PAG oil to the A/C compressor.

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.

11. If you will replace the A/C compressor after flushing the system, perform the following procedure:
11.1. Determine if the new service compressor is shipped with PAG oil.
11.2. If the service compressor is shipped with PAG oil, DO NOT drain the new PAG oil from the compressor.
11.3. 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.
11.4. Add the calculated amount to the compressor, as needed.
11.5. If the service compressor is shipped dry, no calculation is required. Add the total system capacity of PAG oil to the compressor.
12. Install the A/C compressor.
13. Inspect the orifice tube for debris. Clean or replace as needed.
14. Install the orifice tube.
15. Evacuate and recharge the A/C system.
16. Add one bottle of J 41447 using J 41459.

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

17. Leak test the fittings using J 42220.