Rebuild a Trundle Cylinder
Rebuilding the circle cylinders in your vehicle's drum brake development Testament repair leaks, and restore the development to near-factory performance. The explanation to successfully performing this repair project is to determine the type of shove cylinder you carry on your vehicle. Aluminium wheel cylinders can not be honed agnate a shy iron or steel rotate cylinder without damage to the protective anodizing in the cylinder Muzzle. Pump the brake pedal a few times, and test drive to verify the repair.
Lift and aid the vehicle with the floor jack and jack stands. Remove the wheels from the axles that are To possess the spin cylinders rebuilt, and city them away of the elbow grease globe to avoid tripping hazards.
2. Remove the brake drums from remainder of the brake course. Sometimes the drum Testament be stuck due to rust buildup environing the axle. A rare sharp blows, with a hammer, sorrounding the border of the drum Testament gash it freebie of the rust.
3. Remove the two return springs that occupancy the brake shoes tight against the spin cylinder with a brake spring effects. Slide the brake shoes elsewhere of the system. The transmit springs are the extensive springs connecting the brake shoe to the swivel pin located above the shove cylinder on the backing plate.
4. Remove the dust boots, pistons, Mug seals and spring from the inside of the circle cylinder. New dust boots and cup seals are supplied with all wheel cylinder kits, and some kits supply a new inner spring also.
5. Hone the inside of the wheel cylinder with a wheel cylinder hone, attached to an electric drill, if the cylinder is made of cast iron or steel. Aluminum wheel cylinders should never be honed. Aluminum wheel cylinders have a hard, protective, anodized surface inside to prevent corrosion. Honing will remove this surface and cause excessive corrosion and wear. Instead, clean the inside of the aluminum cylinder with soapy water and a green scotch-brite pad to remove debris that collects in the cylinder bore.
6. Clean and dry the wheel cylinder with soapy water to remove residue from honing. Coat the inside of the wheel cylinder bore and the rubber cup seals with a liberal amount of clean brake fluid. Insert the spring into the bore of the wheel cylinder. Install one cup seal, and one piston, in each end of the cylinder bore. Install the wheel cylinder dust boots onto the wheel cylinder.
7. Reposition the brake shoes, and reinstall the return springs with a brake spring tool. Avoid using pliers, side cutters or a screwdriver to reinstall the return springs. Damage to the spring and painful injury could result.
8. Reinstall the brake drum. Bleed the brakes according to the manufacturer's bleeding sequence located in the service manual. Reinstall the wheel, and lower the vehicle back onto the ground. This does not scrimpy aluminium cylinders can't be rebuilt, one that characteristic precautions must be taken. Any circle cylinder with Exorbitant corrosion should be replaced.
