General information
The rear axle load-dependent brake force distribution valve distributes the brake fluid pressure in the front and rear brake circuits to obtain high braking performance and prevent rear wheel lockup and skidding. The brake force distribution valve cannot be disassembled, since its performance depends on the tension of the spring installed in it.
The system consists of two valves located on the fittings of the rear brake lines of the main brake cylinder.
Removal and installation
1. Disconnect the tubes, unscrew the fastening nuts and remove the main brake cylinder, then remove the brake force distribution valves.
2. Establish valves on the main brake cylinder.
- Tightening torque: 35-55 Nm
3. Establish the main brake cylinder and tighten nuts of fastening.
- Tightening torque: 8-12 Nm
4. Connect brake pipes, tighten union nuts of brake pipes and pump over brake system.
- Tightening torque: 13-17 Nm
Examination
1. Remove the brake force distribution valve from the master cylinder.
2. Two pressure gauges are required to carry out the test. Connect the first pressure gauge to the valve inlet (between valve and master cylinder), and the second pressure gauge - to the outlet fitting of the valve (between valve and rear brakes).
Note: After installing pressure gauges, bleed the brake system.
3. Press the brake pedal and measure the pressure at the inlet and outlet of the brake force redistribution valve. If the measured pressure corresponds to the technical data, then the valve is corrected.
Models up to 2001
Checking the operation of the valve.
1 - outlet pressure scale (kg/cm2), 2 - inlet pressure scale (kg/cm2).
Models since 2001
Checking the operation of the valve.
1 - outlet pressure scale (kg/cm2), 2 - inlet pressure scale (kg/cm2), 3 - rear disc brakes, 4 - rear drum brakes.
4. Install the valve, connect the brake pipes to their original position and bleed the brake system.