Warning: An identification color mark is applied to the protrusion on the end surface of the regulator housing (brown, orange, blue, black). The color of the label indicates the setting of the regulator to certain working pressure values. For replacement, purchase a regulator with a label of the same color as on the regulator removed from your compressor.
1. Remove the refrigerant from the air conditioning system (see «Removing refrigerant from the air conditioning system»).
2. Place the vehicle on a lift or pit.
3. Disconnect the wire from the terminal «minus» battery.
4. Thoroughly clean the end surface of the regulator and the surface of the compressor cover around the regulator from dirt.
5. Remove a lock ring of fastening of a regulator.
6. Pull the tab on the end face with pliers and remove the regulator from the compressor housing.
Warning: If aluminum or plastic particles are found on the filter mesh or in the holes of the regulator, then the pump part of the compressor has collapsed. Replacing only the pressure regulator in this case will not give a positive result. You will need to replace the compressor with flushing the system. This rather time-consuming procedure can only be performed in a specialized service center using special technological equipment.
7. Install the new pressure regulator in the reverse order of removal. Make sure the circlip fits into the groove in the compressor housing.
Warnings: When installing a new regulator, be sure to lubricate the O-rings with A/C compressor oil.
8. Charge the air conditioning system with refrigerant at a specialized auto air conditioner service center.