Include one pressure gauge between the master brake cylinder and the pressure regulator, and the other between the regulator and the working cylinder of the rear wheel brake mechanism, by means of tees in the brake hydraulic drive system.
Press the brake pedal several times and check the pressure at the inlet and outlet of the regulator, which must correspond to the values \u200b\u200bspecified in subsection «Detailed Specifications».
If the obtained pressure values deviate from the norm, replace the pressure regulator.