Why are my brake shoes square with the drum?
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 causes rear wheel lockup on Phoenix brakes?
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. Over time the bosses can become grooved and corroded as in Figure 61.6.
How many wires does an antilock brake sensor have?
Some of these sensors have three wires while others have only two. On the three-wire sensors, one wire is for power, one for ground and one for the return signal. On the two-wire sensors, one is the power and the other is ground. The return signal travels back to the module over the power supply wire.
What is the return signal on a two wire brake sensor?
On the two-wire sensors, one is the power and the other is ground. The return signal travels back to the module over the power supply wire. On Jeep and Chrysler applications with two-wire sensors, the return signal is a 7 to 14 milliamp square wave signal.
Where are disc brakes mounted on a car?
They are mounted on the front axle and often the rear as well. To stop a wheel (and your car), a disc brake uses a caliper fitted with brake pads to grab a spinning disc, or rotor. The caliper is an assembly mounted to the vehicle with a bracket so it frames the rotor. It looks and functions like a c-clamp. It contains:
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.
How are the brake pads attached to the wheel?
The rotor is made of cast iron or a steel/cast iron composite. It’s attached to the wheel hub and turns with the wheel. It’s the surface the brake pads contact. When you step on the brakes, pressurized brake fluid pushes against the pistons inside the caliper, forcing the brake pads against the rotor.
What causes rear wheel to lock up when braking?
Problem: One or both rear wheels lockup during braking or the rear end of the car squats when braking. Cause: Rear Wheel lockup or squatting has many causes. Here is the list of possible causes: Service and parking brake adjustment. Rear brake hardware. Shoe lands or bosses. GM clip in wheel cylinders. Brake drum condition.
