In order to carry out a brake caliper overhaul on the front (Single A Piston), one needs the following tools: Piston seal installer (J26267). Start by draining all brake fluid from the caliper, then insert a piece of wood or shop towels between the caliper and the Piston, and then on top of the brake caliper place a shop rag. Care is appropriate with eye protection, and only pump enough compressed air into the brake caliper to move the Piston. Start with removing the shop rag and taking off the wood or towels then remove the boot form the front brake caliper and be very cautious when you try to remove the front Brake Caliper Piston seal with a non-metallic tool. Then demount the bleeder valve from the brake caliper body, clean the bleeder valve, brake caliper body bore, and Brake Caliper Piston with denatured alcohol. In case of corrosion, replace the brake caliper housing and Piston. Clean the brake caliper bore for corrosion with crocus cloth and dry out the parts with non-lubricated, filtered compressed air. Replace the brake caliper or Piston if it does not have any of its components (such as the inside of the cylinder) either scored, corroded or with chrome plating damage or pitting. Lubricate all Piston, Piston seal, and brake caliper bore with new clean brake fluid ensuring, that Piston seal in not twisted in the groove for assembly. Put the Piston seal, boot and Piston into the caliper bore and install front caliper Piston boot using the Piston seal installer (J26267). Lastly, install the bleeder valve and tighten it to 12 nm (110 inch lbs).