Removal
Place chocks under the front wheels, raise the rear of the car and securely support it on stands under the axle.
Remove the brake pads as described in the previous section.
When working under the hood, remove the brake fluid reservoir cap and secure a piece of plastic over the neck with a rubber band or put the cap back on. This will reduce the loss of brake fluid during operations.
Loosen the nut on the brake fluid line at the back of the bracket and disconnect it, being careful not to damage it. Fluid may leak, so plug the open ends.
Unscrew the two bolts and remove the bracket (fig. 9.20.).
Repair
Use a brush to remove any dirt and dust from the bracket, being careful not to inhale the dust.
Please note that you should not try to separate the two halves of the staple.
Use a screwdriver to pry out the dust seal clips, then carefully remove the dust seals.
(Text copied from an internet website: opelbook)
Using a suitable clamp, clamp one of the pistons in its fully retracted position, then apply low pressure air, such as from a foot pump, to the fluid port at the rear of the caliper body to force the other piston out of the cylinder. Be careful not to let the piston fall out, as this could cause damage.
Temporarily block the opening of the cylinder from which the piston was removed with a piece of wood or something else, then remove the clamp from the other piston and again apply low pressure compressed air to the clamp to push the piston out.
Carefully pry the seal out of the grooves in the bracket holes using a plastic or wooden tool.
Inspect the piston surfaces and their caliper bores for obvious metal-to-metal contact. If obvious marks are found, replace the entire caliper assembly.
If the pistons and bores are in good condition, remove the seals and replace them.
Remove dirt from the piston and cylinder bore with brake fluid or denatured alcohol (there is no other way to remove dirt).
Apply a small amount of brake cylinder paste to the pistons, cylinder bore surfaces and seals.
Begin assembly by installing the seals into the grooves of the bracket cylinder holes.
Install the dust seals into the grooves on the pistons, then carefully insert the pistons into the cylinder bores until they engage the seals. You may need to rotate the pistons to prevent them from binding.
Insert the dust seals into the bracket and install the clamps.
Installation
Install the bracket, tighten the bolts as required.
Connect the brake fluid line and tighten the nut.
Install the brake pads as described in the previous section.
Install the running wheel and lower the vehicle to the ground.
Remove the piece of plastic from the neck of the brake fluid reservoir and bleed the brake circuit as described in the second section of this chapter.
Visitor comments