Flushing

FLUSHING

TOOLS REQUIRED

- J 43600 Air Conditioning Service Center
- J 45268 Flush Adapter Kit
- J 41447 Leak Detection Dye
- J 41459 Leak Detection 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. 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 45268-3 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 the 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. Connect the J 45268-1 flush filter to the discharge port of the J 45268 -3 flush adapter.

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

7.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
7.3. Connect the red hose from the J 43600 to the suction port of the J 45268-3.

8. Flush the A/C system. Follow the instructions supplied with the J 43600. 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.
- 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.

NOTE: Refer to Fastener Notice in Service Precautions. Vehicle Damage Warnings

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

10. If replacing the A/C compressor after flushing the system, perform the following:

- Determine if the new service compressor is shipped with PAG oil. Refer to Refrigerant System Capacities.

- 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. Refer to Refrigerant System Capacities. 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. Refer to Refrigerant System Capacities.

11. Install the A/C compressor.
12. Inspect the orifice tube for debris. Clean or replace as needed.
13. Install the orifice tube.
14. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

15. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities.

IMPORTANT Flushing will remove all the PAG oil from 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.