Flushing (Front Only System)

FLUSHING (FRONT ONLY SYSTEM)

TOOLS REQUIRED
- J 43600 ACR 2000 Air Conditioning Service Center
- J 45268 Flush Adapter Kit
- J 41447 Leak Detection Dye
- 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 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 J 45268-2 to the A/C compressor hose assembly.




6. 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 to the suction port of 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.
3. Connect the red hose from J 43600 to J 45268-5.
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:
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 to the discharge port of J 45268-5.
3. Connect the blue hose from J 43600 to J 45268-1.
4. Connect the red hose from J 43600 to the suction port of J 45268-4.
8. Flush the front 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 J 45268-4 from the A/C compressor hose assembly.
10. 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 20 N.m (15 lb ft).

NOTE: Refer to Fastener Notice in Service Precautions.

4. 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.

11. 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. 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.
12. 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.

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