A/C System Flushing Procedure

A/C SYSTEM FLUSHING PROCEDURE

TOOLS REQUIRED:
- J 43600 ACR 2000
- J 45263 Flush Adapter Kit
- J 41447 Leak Detection Dye or equivalent
- J 41459 Leak Detection Dye Injector or equivalent
- J 42220 Universal 12V Leak Detection Lamp or equivalent
- J 39400-A Leak Detector
- J 44551 A/C Suction Screen Kit

A warm engine compartment or higher ambient temperatures speed the refrigerant recovery time during the A/C flush procedure. Whenever possible, warm the engine prior to system flushing. The use of an external fan blowing across the condenser may also be helpful to speed recovery.

FRONT ONLY A/C SYSTEMS
1. Recover system refrigerant.
2. Remove the expansion device (orifice tube or TXV).
3. Connect the A/C lines with the orifice tube removed or install the appropriate TXV Adapter from kit J 45268.
4. Remove the A/C compressor.
5. Inspect the end of the suction hose for a suction screen. Remove the suction screen using the J 44551 A/C suction screen kit, if installed.
6. Install the appropriate A/C compressor hose assembly flush adapter(s) from kit J 45268.
7. Configure the flush adapter and hose for either a forward flush or reverse flush. Refer to the Flushing Configuration section of this bulletin.

FRONT/REAR (DUAL CIRCUIT) A/C SYSTEMS
Each circuit of a front/rear A/C system must be flushed separately. Flow to one circuit must be blocked with the use of a blocked orifice tube or blocked TXV. The front circuit should always be flushed first.

FRONT CIRCUIT
1. Recover system refrigerant.
2. Remove the expansion device (TXV or orifice tube) from the front circuit.
3. Reconnect the A/C lines with the orifice tube removed or install the appropriate non-blocked (open) TXV Adapter from kit J 45268.

IMPORTANT: A blocked orifice tube is not supplied with the J 45268 Adapter kit. A blocked orifice can be made as follows: Cut the orifice tube frame and screen. Remove enough of the frame and screen to access the end of the orifice tube. Seal the tube by pinching oft the end of the orifice tube.

4. Remove the expansion device (TXV or orifice tube) from the rear circuit and install a plugged expansion device (TXV or orifice tube) into the rear circuit.
a. Remove the A/C compressor.
6. Inspect the end of the suction hose for a suction screen. Remove the suction screen using the J 44551 A/C suction screen kit, if installed.
7. Install the appropriate A/C compressor hose assembly flush adapter(s) from kit J 45268.
8. Configure the flush adapter and hose for either a forward flush or reverse flush. Refer to the Flushing Configuration section of this bulletin.
9. Perform the flush of the front system by following the instructions supplied with the J 43600 ACR 2000.
10. Replace the plugged expansion device (TXV or orifice tube) in the rear circuit with an open expansion device (TXV or orifice tube).
11. Replace the open expansion device (TXV or orifice tube) in the front circuit with a plugged expansion device (TXV or orifice tube).
12. Flush the rear system by following the instructions supplied with the J 43600 ACR 2000.