Flushing
FLUSHINGTOOLS REQUIRED
- J 43600 ACR 2000 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 contaminants:
- 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 A/C compressor.
3. Install J 45268 - 5 to the discharge hose.
4. Install J 45268 - 4 to the suction hose.
5. Remove the orifice solenoid.
6. Install J 45268 - 106 in place of the orifice solenoid.
7. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure:
7.1. Service the filter with ACDelco P/N GF 470, before each flush. Connect J 45268 - 1 flush filter to J 45268 - 4 flush adapter.
IMPORTANT: The filter inside J 45268 - 1 is serviceable. Remove and discard the check valve from the filter.
7.2. Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.
7.3. Connect the red hose from J 43600 to J 45268 - 5 flush adapter.
8. Reverse flow refrigerant flushing is recommended for desiccant bag failure. Perform the following procedure and replace the accumulator when the flush is complete:
8.1 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.
8.2. Connect J 45268 - 1 flush filter to J 45268 - 5 flush adapter.
8.3. Connect the blue hose from J 43600 to J 45268 - 1 flush filter adapter.
8.4. Connect the red hose from J 43600 to J 45268 - 4 flush adapter.
9. Flush the A/C system. Follow the instructions supplied with J 43600.
IMPORTANT: Close the valve on the external refrigerant tank, before starting the flush process.
10. Remove J 45268 - 106.
11. Install new O-rings.
IMPORTANT: Lubricate the new expansion tube O-rings with mineral base 525 viscosity refrigerant oil before installing into the evaporator hose.
12. Inspect the orifice solenoid screen for debris. Clean or replace as needed.
13. Install the orifice solenoid.
14. Remove J 45268 - 4 from the suction hose.
15. Remove J 45268 - 5 from the discharge hose.
16. Remove J 45268 - 1 from J 43600.
17. If you will reinstall the removed A/C compressor, perform the following procedure:
17.1. Drain the PAG oil from the A/C compressor. Rotate the compressor input shaft to assist in draining the PAG oil from the compressor.
17.2. 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. Replenish the A/C system with the correct amount of PAG oil.
18. If you will replace the A/C compressor after flushing the system, perform the following procedure:
18.1. Determine if the new service compressor is shipped with PAG oil.
18.2. If the service compressor is shipped with PAG oil, Do NOT drain the new PAG oil from the compressor.
18.3. Deduct the amount of PAG oil shipped with the service compressor from the amount of PAG oil listed in the capacities table.
18.4. Add the calculated amount to the compressor, as needed.
18.5. If the service compressor is shipped dry, no calculation is required. Add the total system capacity of PAG oil to the compressor.
19. Install the A/C compressor.
20. Evacuate and recharge the A/C system.
21. Add one bottle of J 41447 using J 41459.
IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.
22. Leak test the fittings using J 42220.