Flushing
TOOLS REQUIRED- J 43600 Air 2000 Air Conditioning Service Center
- J 45268A/C Flushing Adapter Kit
- J 41447R-134A A/C Tracer Dye - Box of 24
- J 41459R-134A - A/C Tracer Dye Injector
- J 42220 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 PAG oil
- Desiccant, following a desiccant bag failure
- Overcharge of PAG oil
- Refrigerant contamination
1. Recover the refrigerant.
IMPORTANT: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.
2. Remove the orifice tube.
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor.
5. Install the J 45268 -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 the J 45268 -1 flush filter to the suction port of the J 45268 -3 flush adapter.
IMPORTANT: The filter inside J 45268 -1 is serviceable. Remove and discard the check valve from the filter.
6.2. Connect the blue hose from the J 43600 to the J 45268 -1 flush filter adapter.
6.3. Connect the red hose from the J 43600 to the J 45268 -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 J 45268 -1 is serviceable. Remove and discard the check valve from the filter.
7.2. Connect the J 45268 -1 flush filter to the discharge port of the J 45268 -3 flush adapter.
7.3. Connect the blue hose from the J 43600 to the J 45268 -1 flush filter adapter.
7.4. Connect the red hose from the J 43600 to the suction port of theJ 45268 -3.
8. Flush the A/C system. Follow the instructions supplied with the J 43600.
IMPORTANT: Close the valve on the external refrigerant tank, before starting the flush process.
9. Remove the J 45268 -3 from the A/C compressor hose assembly.
10. If you will reinstall the removed A/C compressor, perform the following procedure:
- Remove the A/C compressor drain plug.
- Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
- Install the A/C compressor drain plug.
- 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.
Tighten
Tighten the drain plug to 20 N.m (15 lb ft).
11. If you will replace the A/C compressor after flushing the system, perform the following procedure:
- Determine if the new service compressor is shipped with PAG oil.
- 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.
- Add the calculated amount to the compressor, as needed.
- 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 the J 41459.
IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.
17. Leak test the fittings using the J 42220.