Jeep 4313056 Wheel Cylinder-Wheel

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New wheel cylinders are available, which makes this job quite easy. If it's decided to rebuild the wheel cylinder, make sure that a rebuild kit is available before proceeding. Never overhaul only one wheel cylinder always rebuild both of them at the same time. Raise the rear of the vehicle and support it securely on jackstands. Block the front wheels to keep the vehicle from rolling. Remove the brake shoe assembly. Remove all dirt and foreign material from around the wheel cylinder. Completely loosen the brake line fitting, then remove the two wheel cylinder mounting bolts. Don't pull the brake line away from the wheel cylinder. Remove the wheel cylinder mounting bolts. Detach the wheel cylinder from the brake backing plate and place it on a clean work bench. Immediately plug the brake line to prevent fluid loss and contamination. If the brake shoe linings are contaminated with brake fluid, install new brake shoes. Remove the bleeder screw, piston cups, pistons, boots and expander assembly from the wheel cylinder body. Clean the wheel cylinder with brake fluid or brake system cleaner. Use compressed air to remove excess fluid from the wheel cylinder and to blow out the passages. Check the cylinder bore for corrosion and score marks. Crocus cloth can be used to remove light corrosion and stains, but the cylinder must be replaced with a new one if the defects cannot be removed easily, or if the bore is scored. Lubricate the new cups with brake fluid. Assemble the wheel cylinder components. Make sure the recessed sides of the cups face in. Place the wheel cylinder in position and install the bolts. Connect the brake line and tighten the fitting. Install the brake shoe assembly. Bleed the brakes. Check brake operation before driving the vehicle in traffic.

Lubricate the components with clean brake fluid or brake assembly lubricant before installation. With the cylinder bore coated with clean brake fluid or brake assembly lube, install the spring and cup expanders. Install the cups in each end of the cylinder, ensuring the open ends of the cups are facing each other. Engage the boot on the piston and slide the assembly into the bore. Carefully press the boot over the cylinder end until it is seated. Repeat the procedure for the remaining boot and piston. Install the bleeder screw.