Problem removeing brake discs.

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Before any service is performed, carefully check the following:

• Be sure the vehicle is properly centered and secured on stands or a hoist.
• If the vehicle has antilock brakes, depressurize the system according to the procedures given in the service manual.
• Disconnect the battery ground cable.
• Front brake pad replacement begins with removing brake fluid from the master cylinder reservoir. If this is not done, the fluid could overflow and spill when the pistons are forced back into the caliper bore, possibly damaging the painted surfaces.
• Replace the cover.
• Discard old brake fluid.

• Raise the car. Make sure it is safely positioned on the lift.
• If you don't have a lift, use a jack and jack stands.
• A handle on the jack is moved up and down to raise part of a vehicle and a valve is turned to release the hydraulic pressure in the jack to lower the part. At the end of the jack is a lifting pad.
• The pad must be positioned under an area of the vehicle's frame or at one of the manufacturer's recommended lift points.
• Never place the pad under the floorpan or under steering and suspension components, because they can easily be damaged by the weight of the vehicle.
• Always position the jack so that the wheels of the vehicle can roll as the vehicle is being raised.
• Never use a lift or jack to move something heavier than it is designed for. Always check the rating before using a lift or jack. If a jack is rated for 2 tons, do not attempt to use it for a job that requires a 5-ton jack. It is dangerous for you and the vehicle.
• Safety stands, also called jack stands, are supports of various heights that sit on the floor. They are placed under a sturdy chassis member, such as the frame or axle housing, to support the vehicle.
• Once the safety stands are in position, the hydraulic pressure in the jack should be slowly released until the weight of the vehicle is on the stands. Like jacks, jack stands also have a capacity rating. Always use the correct rating of jack stand.
• Never move under a vehicle when it is supported by only a hydraulic jack. Rest the vehicle on the safety stands before moving under the vehicle.
• The jack should be removed after the jack stands are set in place.
• This eliminates a hazard, such as a jack handle sticking out into a walkway. A jack handle that is bumped or kicked can cause a tripping accident or cause the vehicle to fall.
• If you use support stands on asphalt, put a piece of thick plywood or a steel plate under the stands.
• Remove its wheel assemblies.

• Inspect the brake assembly.
• Look for signs of fluid leaks, broken or cracked lines, or a damaged break rotor. If a problem is found, correct it before installing the new brake pads.

• Loosen the bolts and remove the pad locator pins.
• During servicing, grease, oil, brake fluid, or any other foreign material must be kept off the brake linings, caliper, surfaces of the disc, and external surfaces of the hub. Handle the brake disc and caliper in such a way as to avoid deformation of the disc and nicking or scratching of the brake linings.
  
  
  
• Lift and rotate the caliper assembly from the rotor.

• Remove the brake pads from the caliper assembly.

• Fasten a piece of wire to the car's frame and support the caliper with the wire.
• When a hydraulic hose is disconnected, plug it to prevent any foreign material from entering.

• Check the condition of the locating pin insulators and sleeves.

• Place a piece of wood over the caliper's piston and install a C-clamp over the wood and caliper.
• Tighten the clamp to force the piston back into its bore.