GM 18014744
Caliper, Front

To replace the brake caliper, one has to remove two-thirds of the brake fluid from the Brake Master Cylinder; then lift and support the vehicle with suitable safety stands. Next, you need to take out the tire and wheel, and compress in the front Brake Caliper Piston with the help of a c-clamp or pliers in the top part of the front brake caliper housing towards the inboard front Brake Pad. Separate the front brake hose from the front brake caliper and plug the front Brake Line to avoid moisture contamination of the brake fluid. Unscrew the front brake caliper bolts and pull off the front brake caliper from the front brake rotor cautiously, making sure not to polish off any corrosion. Check the front caliper bolts for corrosion and replace any imperfect parts and examine the caliper bolt bushings for any ciphers, cuts or corrosion and also to replace any imperfect bushings. For installation, attach the front brake caliper to the front brake rotor ensuring the bushings are in proper alignment before fitting the front brake caliper bolts and sleeves and soaking in silicone paste before bolting up to 51 nm (38 ft. Lbs.). Attach the front brake hose back onto the front brake caliper and determine the clearance of front brake caliper to bracket stops. If needed, the front brake caliper should be removed, and the ends of the bracket must be filed into a total clearance of 0,26-0,60mm (0,010-0,024 inch). To achieve custom clearances for each brake, this process is to measure the clearances separately and then put them together, bleeding the system. After installing the tire and wheel, completely fill the Brake Master Cylinder and pump the brake pedal several times before driving the vehicle, then checking the fluid in the Brake Master Cylinder. Finally mount the tire and wheel, inspect the braking system, take off the safety stands and lower the vehicle.

Use a brass punch and a hammer to drive the support key into place.

Use a large C-clamp over the top of the caliper housing against the back of the outboard pad, tightening it until the piston is pushed into the caliper bore enough to slide the caliper off the rotor.

Lubricate the new piston seal, caliper bore, and piston with clean brake fluid.

Use crocus cloth to polish it; replace the caliper if corrosion cannot be removed.

Use just enough air pressure to ease the piston out of the bore.

It may be necessary to bleed all or part of the brake system.

Always replace brake pads in axle sets and use the specified torque values for dry, unlubricated fasteners.

Remove the tire and wheel assembly.

Clean them with denatured alcohol and dry with non-lubricated, filtered air.

Raise the vehicle and remove the tire and wheel assembly.

Install the tire and wheel, lower the vehicle, fill the master cylinder with clean brake fluid, and bleed the brake system.

Avoid placing fingers in front of the piston while applying compressed air to prevent serious injury.

Ensure smooth and complete travel of the caliper piston(s) into the caliper bore(s); if the caliper piston is frozen or difficult to bottom, the caliper requires overhaul or replacement.