How To Replace a Leaking Rear Wheel Cylinder in a Jeep Cherokee

The rear drum brakes on Jeep Cherokees are generally reliable and long lasting. One common problem as the brakes age is that the wheel cylinder leaks. The wheel cylinder has two pistons that press out on the brake shoes when the pedal is depressed. Also, water can contaminate the fluid and cause the lining of the cylinder to rust.
Remove the wheel and tire.
Using a 3/8" line breaking wrench, loosen the brake line where it connects to the wheel cylinder. Heat can help if it is severely stuck. Use a pan or a rag to catch the brake fluid that drains out.
Remove the brake drum. Loosen the brake shoes slightly if necessary.
Using a brake spring tool, remove the two upper brake shoe springs. Pull the front shoe slightly forward and slip the wheel cylinder out around the axle flange. Clean up and fluid that had leaked into the brake drum.
Slip in the new wheel cylinder. Reseat the front brake shoe. Replace the springs using the other end of the brake spring tool. Reconnect the brake line. Reinstall the brake drum and adjust the tension.
Add brake fluid to the master cylinder to replace what drained out. Bleed the brakes by having an assistant depress the brake pedal while you open and close the bleeder screw.
Once the fluid runs clear with no air, tighten the bleeder screw and install the protective cap. Lower the Jeep and top off the master cylinder before driving.