Why would drum brakes stick?
Drum brakes have a backing plate, brake shoes, a brake drum, a wheel cylinder and return springs. Of all these parts, the brake caliper can get stuck, causing a sticking sensation, so pay attention to wheels equipped with disk brakes. Alternatively, if a brake hose has worn out, it can also cause the caliper to stick.
What happens when rear brakes lock up?
A bad brake system proportional valve delivering equal fluid pressure to the entire brake system can cause the rear wheels to lock-up during heavy braking. A failed ABS pump will cause poor braking performance as well as brake lock-up. Never drive a car if you suspect a brake fluid leak.
What should I do if my drum brakes keep sticking?
Do not pump the brakes. Allow about five seconds between each push on the brake pedal. The cylinder piston should extend when the pedal is pushed and retract when the pedal is released. A defective cylinder can remain extended and hold the shoes against the drum.
Why is the rear brake shoe not coming back in?
The rear brake shoe should move out when the parking brake is set, and move back when the parking brake is released. If the parking brake cable is rusted, kinked, or otherwise damaged, the rear brake shoe will not return when the parking brake is released, causing the rear shoe to drag on the drum. Do not breathe brake dust.
Why are my brake shoes square with the drum?
The shoe lands or “bosses” are an often overlooked item when looking for the cause of a rear wheel lockup condition. The shoe lands keep the brake shoes square with the drum and provide a friction surface for the shoes to move against.
What are the cylinders on a drum brake system?
Average rating from 206 customers who received a Brake System Inspection. Brake wheel cylinders are a component found on modern drum brake systems. They are the hydraulic component that extends to press the brake shoes against the brake drum when the pedal is depressed.