Pressure regulator
The pressure regulator limits the output pressure to the rear brakes after the pressure reaches the limit value in the master brake cylinder. The adjuster is used when less force is needed on the rear brakes to achieve optimal braking.
Brake fluid level sensor
The brake fluid level sensor, located in the brake fluid reservoir, turns on the BRAKE warning light when the brake fluid level is low. As soon as the brake fluid level reaches the correct level, BRAKE goes out.
Vacuum brake booster
The vacuum brake booster reduces the force on the brake pedal, making it easier to drive. The vacuum amplifier uses a diaphragm, which, during normal operation, has a vacuum on both sides. When braking, air is supplied from one side of the diaphragm, thereby creating atmospheric pressure. Due to the pressure difference transmitted through the diaphragm, the pusher moves in the direction of rarefaction (vacuum), providing auxiliary force for braking. When the brake pedal is released, air is pumped out of the amplifier cavity through the control valve and a vacuum is created.
Master brake cylinder
The brake master cylinder is designed for use on dual circuit brake systems. The front brake and rear left brake are actuated by the primary piston, and the front left brake and rear right brake are actuated by the secondary piston. The brake master cylinder combines the functions of a standard dual brake master cylinder plus a low brake fluid indicator and brake pressure regulator.
Caution: Replace all parts included in the repair kit used to service the brake master cylinder.
Attention: Lubricate the rubber parts with clean brake fluid when installing to facilitate assembly. Do not use commercial compressed air to dry or clean brake parts. This may damage the rubber parts. If any part of the hydraulic system is removed or disconnected, completely bleed the brake system.
Attention: The tightening torque values are for a dry, lubricated fastening.
Caution: Perform all repairs on a clean workbench that is free of mineral oil stains.
Front wheel disc brakes
The brake caliper is attached to the steering knuckle with two bolts. The fluid pressure generated by pressing the brake pedal is converted into braking force. This force acts equally on the piston and caliper. As a result, the piston moves outward, and the caliper moves inward, clamping the brake disc. When compressed, a friction force is created between the friction linings of the brake pads and the brake discs, which helps to stop the car.
Caution: Be sure to replace all pads on the same vehicle axle, even if only one pad is worn. If the brake pads are reinstalled, they must be marked before removal.
When you press the brake pedal, the brake fluid presses on the piston, moving it out of the cylinder. Piston seal under the action of significant pressure on the piston moves with the cylinder. However, since a part of the piston seal is fixed in a groove whose shape matches that of the seal, the top of the seal is deformed in the direction of piston movement.
When the brake pedal is released, the pressure of the brake fluid decreases and the elastic force created by the deformation of the piston seal returns the piston to its original position.
As the brake pads wear and the gap between the brake disc and the pads increases, the piston moves even more, thereby keeping the gap the same. The stuffing box can later change in shape, but since the inside of the stuffing box is fixed in the groove of the cylinder, the amount of deformation remains the same. The piston moves further to close the clearance distance. Since the piston returns the same distance and the rubber seal returns the piston to its original position, the clearance between the brake disc and the brake linings is maintained at the required level.
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