I've bled the system, no leaks, new pads, after bleeding there is not any air in the system.
SOURCE: installing rear brake caliper rebuild kit.
To remove piston safely use the brake pedal to press out piston. You will need to remove the pads so it can do this. You will need a container to catch the fluid when the piston comes out. Clean the the piston with a fine polishing cloth 600 grit or higher so as not to leave scratches, replace piston if it pitted or burred. Clean inside of caliper, remove inside seal with dental type tool. Roll in the new seal, position same as old one. install new outter dust boot if equipped with one. Lubricate seal and leading edge of piston with brake fluid. Slide piston into calipier. You will need to make sure it is started straight and then use a C-clamp to compress the piston all the way in. Never ever use any oils or grease any any internal brake parts because it will cause seal failure. Clean parts are critical, but again , no petroleum products. Good luck
SOURCE: What is the proper procedure to bleed the air out
The one man way is to get a small botle( a spice bottle and fill it about a third of the way up. Place a piece of tube (clear preferably)of the proper dimension over your bleeder valve located on caliper. Then open bleed valve and presson brake pedal. If all bubbles escaped thru tube into bottle, then you may repeat untilno bublesremain then tighten bleeder valve. If bubbles remain in hose, close bleeder before releasing brake. This will probably require an assistant. Ensure you keep reservoir from going dry by filling when necessary. Repeat as necessry until all bubbles are gone from brakelines.
SOURCE: New Pads new brake line cleaned and rebuilt caliper
It is one of two possible things:
There's corrosion in the caliper. Specifically in the groove that holds the piston seal. Take the seal out and scrape all signs of corrosion from the groove.
OR, the master cylinder has a gummed up check valve. Sometimes, you can take the master cylinder off, clean it out with hot soapy water (Simple Green works very well), blow it out with compressed air - and it'll be fine (without taking it apart). Otherwise, you'll need to get the rebuild kit and replace all of its internal moving parts.
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SOURCE: changed rear brake pads tryed to bleed in case of ...
You have an air bubble in the master cylinder. If you are lucky you can wiggle the brake pedal and get it to move into the reservoir . Mechanics push brake fluid backwards from the brake cylinder to the master cylinder ( with a special pump ) to remove the air . If you have access, you can lay down plastic and rags and loosen the hollow bolt attaching the brake hose to the master cylinder ( about 1/8 turn) now pump the pedal once or twice. Re tighten the bolt while slowly pushing down on the pedal, re bleed the system at the back and usually this will get the bubble out.
SOURCE: I have a'90 goldwing,I cannot get brake fluid thru
Your rear brake pedal operates the rear caliper and the front disc. When you tried to bleed the left front caliper you let air into the rear brake system. Bleed the rear brake and front left caliper using the rear brake pedal that should restore the rear (and front) brakes.
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