![]() ![]() When replacing a wheel cylinder, be sure to also inspect your brake drums and shoes for signs of wear or damage, and either resurface or perform a DIY drum brake repair if necessary. This can prevent you from stopping entirely, so it's best to replace a bad wheel cylinder as soon as possible. ![]() Continuing to drive with a bad wheel cylinder can affect your vehicle's ability to slow or stop, and if the wheel cylinder fails entirely, you may lose all brake pressure. If you notice these symptoms, be sure to check your wheel cylinder for damage. Signs of a bad wheel cylinder include poor brake response, a soft or spongy brake pedal, as well as brake fluid leaks, contamination, or a slight film of brake fluid on the backing plate. Excessive heat caused by friction, exposure to moisture, and general wear can also cause your wheel cylinders to degrade, leak, or ultimately fail. Over time, wheel cylinders can develop brake fluid leaks or corrode - this may cause low brake pressure or a stuck piston which can keep the brake shoe engaged and lead to premature wear. Since you can't see most of the wheel cylinder from the outside of the vehicle, it's important to know the signs of wheel cylinder and brake system failure for a safer drive. Your wheel cylinders are crucial to safely and successfully handling your car on the road, helping you prevent an accident and providing smooth, controlled stopping performance. The brake shoes are held in place against the backing plate and use springs that pull the shoe away from the drum when brake pressure is released. When you apply your brakes, the wheel cylinder receives hydraulic pressure that forces the brake shoes against the brake drum, generating friction that slows down your vehicle. A drum brake system's wheel cylinder is a vital hydraulic component that helps stop your car by using brake fluid to pressurize and extend its two pistons.
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