Either with a large pair of water pump pliers or a c-clamp
Use a "C" clamp to collapse the caliper piston. Use one of the old pads across the face of the piston. If you use the clamp on the bottom of the piston it is possible to crack the piston. Using the old pad spreads the pressure to both sides of the piston. That is if the piston is a cup. If it is solid on the face then it screws in, but I believe this type is only used on the rear brakes of cars.
10 FEET
be sure to purcahse the tool to "screw" the caliper piston in. If you try to push the piston in on rear disc brakes you will damange the caliper.
It is a tool to reset the piston on rear discs brakes
The best thing you can do is replace the caliper.
The piston is forced out of the caliper by the pressure of the brake fluid. This pushes the brake pads against the rotor, in turn stopping the vehicle.
Yes
Remove caliper mounting bolts Slide caliper off rotor Use a "C" clamp to fully retract piston into caliper body If parking brake is used on this caliper piston is threaded and a special tool (not expensive) is required to thread piston into caliper body
Disk brakes by design do not have adjustments - the pads 'float' with the caliper and the piston movement.
you have to turn the piston like a bolt
screw it in turn the piston clockwise and screw it in , only for rear brakes
Use a large C- clamp to depress the piston enough to remove the caliper.