Pontiac 3494139 Caliper Asm,Rear Brake

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If an overhaul job is necessary, it is often needed because the seals have failed and can leak; there are other possibilities though, so consider all options before you get started. New force sensors together with factory rebuilt ones can be purchased on an exchange basis, and therefore this task is relatively easy. In the event that rebuilding the calipers is chosen, it is recommended to have a rebuild kit prior to the process being done and the process of rebuilding must be done in sets. The removal procedure takes a few basic steps comprising of detaching the hydraulic line to the caliper and in some models the parking brake cable and bolts on the upper or the lower part of the caliper. When preparing to service any of the ABS components pump the brake pedal at least 40 times with the ignition switched off to subtract hydraulic pressure. For calipers in front brake applications on some models it is recommended to clean the exterior with brake system cleaner, exercising the removal of the pistons with compressed air, and working carefully with the dust boots and seals. Check pistons and caliper bore for signs of wear and if require polish it lightly and apply clean brake fluid during assembly. For rear calipers, it maybe necessary to remove various components and operate the piston out using the actuator screw which should then be cleaned thoroughly. Visually check the exterior for signs of wear and tear, and replace these parts when necessary; internally, the exertions should be the same with the addition of greasing internal components; fitting new seals and components must also be precise. The procedure of installation is similar to the removal of hydraulic system where new copper washers must be placed at the hydraulic line connection and the hydraulic system must be bled after the installation.

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.