Working:
- When the brakes are not in operation, the system is filled with brake fluid under light pressure. When driver presses the brake pedal for applying the brake, the piston in the master cylinder moves forward and compresses the fluid in cylinder.
- It increases the pressure of the fluid in master cylinder and in entire hydraulic system.
- This pressure is instantly transferred to all four wheel cylinders (in case of disc brake this pressure is transferred to calipers).
- Thus the piston in wheel cylinders moves outward which moves brake shoes against brake drum to apply brakes. When driver releases the brake pedal, the master cylinder piston returns to its original position due to return spring and the pressure is dropped.
- It releases brake shoes from brake drum to their: original position and brakes .
Advantages:
1. Brake fluid act as lubricant.
2. Reduces frictional losses.
3. Lighter in weight.
Disadvantages:
1. They can leak which makes them messy
2. Fluid inside them are often caustic to paint and some seals
0 Comments