The Hydraulic System Keeps You Stopping Smoothly

Brake Fluid is stored in the Master Cylinder (2). When the brake pedal is depressed, the pistons in the master cylinder force higher fluid pressure through the Pressure Differential Switch (3), which balances braking force between the front and the rear. The increase in fluid pressure then travels along the steel Brake Lines (4) and flexible Brake Hose (5) to the front and rear brake systems.

Brake Fluid: Fluid should be periodically drained and replaced. Old fluid contains particles which can plug and corrode the brake lines.

Master Cylinder: This should periodically be checked for leaks and efficiency. Leakage is sometimes visible from the outside and can also be detected by a "spongy" pedal action or excessive pedal travel.

Pressure Differential Switch: This is a combination valve which controls brake fluid pressures. On some model vehicles, a Metering Valve may be installed to balance the pressure between the front disc brakes and rear drum brakes on vehicles with front disc brakes. On some model vehicles, a Proportioning Valve may be used to reduce the hydraulic force applied to rear drum brakes during rapid braking, preventing rear wheel locking and skidding. A Warning Sensor turns the brake warning light on during a hydraulic brake malfunction. If not working, this switch should be serviced or replaced.

Brake Lines: Steel brake lines can become clogged or rusted from inside when water seeps into the hydraulic system. Damaged lines should be replaced.

Brake Hose: Outside surfaces can be damaged by road debris. Cracks can form from temperature variations and aging. Inner surfaces can become clogged. Leaks can occur at end fittings. New hoses should be installed for any of these reasons.

F & F Tire & Service Co.

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