Wheel Cylinders
A wheel cylinder is a crucial component of a drum brake system. It's located in each wheel, typically positioned at the top, above the brake shoes. Its primary function is to exert force onto the shoes, pressing them against the drum to slow down or stop the vehicle through friction.
Here's a breakdown of the wheel cylinder:
- Housing: Made of cast iron or, in newer models, lightweight aluminum.
- Pistons: Usually two per cylinder, with rubber seals and shafts connecting them to the brake shoes.
- Ports: Allow brake fluid to enter and exit the cylinder, pushing the pistons outward or inward.
- Pushrods: Connect the pistons to the brake shoes, transferring the force generated by the hydraulic pressure.
A wheel cylinder is a crucial component of a drum brake system. It's located in each wheel, typically positioned at the top, above the brake shoes. Its primary function is to exert force onto the shoes, pressing them against the drum to slow down or stop the vehicle through friction.
Here's a breakdown of the wheel cylinder:
- Housing: Made of cast iron or, in newer models, lightweight aluminum.
- Pistons: Usually two per cylinder, with rubber seals and shafts connecting them to the brake shoes.
- Ports: Allow brake fluid to enter and exit the cylinder, pushing the pistons outward or inward.
- Pushrods: Connect the pistons to the brake shoes, transferring the force generated by the hydraulic pressure.
How wheel cylinders work:
- When you press the brake pedal, hydraulic pressure is generated in the master cylinder.
- This pressure travels through the brake lines to the wheel cylinders.
- The pressure enters the ports in the cylinders, pushing the pistons outward.
- The pistons, in turn, push the brake shoes against the inner surface of the drum, creating friction.
- This friction slows down or stops the wheel.
Signs of a faulty wheel cylinder:
- Leaking brake fluid around the wheel
- Uneven braking or pulling to one side
- Soft or spongy brake pedal
- Increased braking distance
Replacing a wheel cylinder:
Replacing a wheel cylinder is a relatively complex task and should ideally be done by a qualified mechanic. However, if you're mechanically inclined and have the necessary tools, you can find DIY tutorials and guides online.
Here are some additional things to keep in mind about wheel cylinders:
- They are typically specific to the make and model of your vehicle, so ensure you get the right replacement parts.
- Bleeding the brakes is necessary after replacing a wheel cylinder to remove any air trapped in the system.
- It's crucial to use the correct type of brake fluid for your vehicle.
