Pontiac 19141028 Caliper Asm,Front Brake (W/O Brake Pads) (Remanufacture)

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Before you disengage and bring in the brake calipers to service the 1990 Deville and Fleetwood models be sure to depressurize the hydraulic accumulator because the hydraulic system has brake fluid under very high pressure if the car is equipped with anti-lock brake system. Open the master cylinder bleed screw cap and take out two-thirds of brake fluid using a syringe and then lift and securely jack up the automobile. Get out the wheel and tire assembly, reinstall only two bolts to hold the disc brake rotor in place, and then use pliers to install the piston in the caliper to the bottom most position. If caliper has been removed it is now necessary to release the brake hose, to discard gaskets and to plug the holes to avoid losing the liquid. Next, you must remove the caliper mounting bolts and sleeves after that, the caliper will have to be taken off. For installation, check the bolts and bushing for damage, and applying grease on the bushings you should then place the caliper over the rotor. Secure the mounting bolts of the caliper to the respective torque, verify the clearance of the caliper on the bracket stop and fit the brake hose with new gaskets. Following bleeding of the brake system, ensure that you replace the wheel and tire assembly, lower the car and check the amount of the brake fluid. The process for the 1991-93 models is somewhat The same with the use of a C-clamp in order to force the piston into the caliper. During rebuilding of dual piston calipers, the caliper has to be detached after which the piston has to be blown out using compressed air and the interior assessed for signs of wear and the entire hardware has to be cleaned before being rebuilt. Replace the seals used in the caliper and also the pistons and boots that may be worn out, then the caliper has to be reinstalled and the brake system adequately flushed.

Remove the disc pads and disconnect the brake flexible hose from the rigid brake line at the support bracket, capping the line to prevent fluid loss. Unbolt and remove the caliper along with the flexible hose, noting the copper sealing gaskets that should be replaced upon reconnection. Clean the exterior of the caliper with brake fluid, avoiding gasoline or solvents, and place the assembly on a clean workbench. Drain the fluid from the caliper, then insert a cloth pad between the caliper piston and body. Apply air pressure to the fluid inlet hole to free the piston; if unsuccessful, use hydraulic fluid pressure by reconnecting the caliper to the brake line and having an assistant slowly depress the brake pedal to force the piston out. Carefully pry the dust boot out of the caliper bore and remove the piston seal using a small piece of wood or plastic to avoid damage. Remove the caliper bleeder valve and discard the sleeves, bushings, and all rubber parts. Clean the remaining components in brake fluid, allowing them to drain and shaking them to remove excess fluid. Examine the piston for defects and check the caliper bore, allowing light polishing for minor corrosion. Lubricate the piston bores and seal with clean brake fluid, positioning the seal in the groove. Lubricate the piston and assemble a new boot with the fold towards the open end, then insert the piston squarely into the caliper bore and apply force to seat it. Position the dust boot in the caliper counter bore and use a suitable drift to secure it, ensuring even installation. Install the bleeder screw and complete the installation by reversing the removal steps, using new copper gaskets for the brake hose connection and bleeding the system of air.

Raise and support the vehicle, remove the wheel and tire assembly, and if removing the caliper, detach the brake hose and plug openings.