The Chevrolet Express Wheel Cylinder changes the hydraulic pressure to an outward movement, which pushes the brake shoes against the drum and provides reliable stopping power. The early vans applied a cast-iron Wheel Cylinder but later switched to corrosion-resistant aluminum. Both styles, however, contain twin pistons each with cup seals, an expander spring, and dust boots to protect the whole assembly. The Wheel Cylinder pushes the shoes against the drum when brake fluid enters the middle of the bore, forcing each piston apart. Everything is pulled back by return springs when the pedal is released. In some model years, a single two-piston Wheel Cylinder is mounted above the shoes. In other years, a pair of single-piston units perform the same function. So the difference is merely one of layout and service procedure. The cylinder has a bleeder screw at its greatly high point which allows trapped air to escape, creating a firm pedal. Because the glycol fluid attracts water, this will cause rusting that will pit the bore. Not only that, but it will tear the seals, and this will cause leaks, low pedal feel, or brake drag. Therefore, the driver should check boots for seepage and replace or rebuild the Chevrolet Express Wheel Cylinder as needed to keep Chevrolet brakes reliable on every Express journey.
Each OEM Chevrolet Express Wheel Cylinder we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.