Brake Wheel Cylinder Replacement
What is a brake wheel cylinder?
Wheel cylinders are the component used to press the brake shoes against the inner lining of the brake drum on a drum brake system. They are the drum brake equivalent to the brake caliper used on disc brakes.
How does the brake wheel cylinder work?
The wheel cylinder functions by use of hydraulic pressure supplied by the master cylinder. When the wheel cylinder receives this pressure, both ends are pressed outward, forcing the brake shoes into the brake drum. The brake drum rotates with the wheel, so the hydraulic pressure from the wheel cylinder is transferred to the shoes, then the brake drum, and ultimately slows or stops the tires.
What are the symptoms related to a bad brake wheel cylinder?
Brake wheel cylinder failure occurs in two different ways, with two opposite symptoms. The wheel cylinder can become seized, in which case it will not release the brake shoes from the rotor. The seized cylinder will cause the vehicle to brake constantly on one side of the vehicle, forcing the vehicle to move toward that side. Also, this pulling will be accompanied by a strong odor from one wheel. Another way wheel cylinders fail is by leaking. If there is a leak, the brake pedal will be noticeably easier to push, and will sink all the way to the floor when held. After only a few repetitions of pressing the brake pedal, the braking ability of the vehicle may become completely compromised. There may also be brake fluid leaking onto the wheel.
Can I drive with a brake wheel cylinder problem?
It is not safe to operate any vehicle with any braking problem. If there is any sign that the brakes are not performing as originally intended, the vehicle should immediately be placed out of service, and repaired.