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Flushing



FLUSHING

TOOLS REQUIRED
- J 41447 Leak Detection Dye
- 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 polyalkylene glycol (PAG) oil
- Desiccant, following a desiccant bag failure
- Overcharge of PAG oil
- Refrigerant contamination

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.

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 - 4 to the suction hose.
6. Install the J 45268 - 5 to the discharge hose.




7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil.Perform the following procedure:
1. Service the filter with ACDelco P/N GF 470, before each flush.Connect J 45268 - 1 flush filter to the J 45268 - 4 flush adapter.

IMPORTANT: The filter inside J 45268 - 1 is serviceable. Remove and discard the check valve from the filter.

2. Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.
3. Connect the red hose from J 43600 to J 45268 - 5.
8. Reverse flow refrigerant flushing is recommended for desiccant bag failure only. Perform the following procedure and replace the accumulator when the flush is complete:
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.

2. Connect J 45268 - 1 flush filter to the J 45268 - 5 flush adapter.
3. Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.
4. Connect the red hose from J 43600 to the J 45268 - 4.
9. 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.

10. Remove the J 45268 - 5 from the discharge hose.
11. Remove the J 45268 - 4 from the suction hose.
12. If the removed A/C compressor will be reinstalled, perform the following procedure:
1. Drain the PAG oil from the A/C compressor.Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
2. Add the total system capacity of PAG oil to the A/C compressor. Refer to Refrigerant System Capacities.

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.

13. If the A/C compressor will be replaced after flushing the system, refer to Compressor Oil Balancing (LD8).
14. Add one bottle of J 41447 directly to the A/C compressor.

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

15. Install the A/C compressor.
16. Inspect the orifice tube for debris. Clean or replace as needed.
17. Install the orifice tube.
18. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
19. Leak test the fittings using J 42220.
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