I saved myself a lot of greasy work buying a car with no engine. Right away I decided to replace all the brake parts. The rotors on the car were all rusted out and the first time I stepped on the brake pedal it went straight to the floor. So I removed all the old, rusted stuff and threw the rotors in the recycling bin. I decided to try rebuilding the front calipers and bought the rebuild kit from pelican. It will be awhile before I know if what follows was done right. I don't claim to be any kind of expert on this subject. An earlier yard sale purchase came in handy for removing the pistons.
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The yellow clamp holds down one piston while the other gets pushed out. It takes a lot of pressure to just get the piston moving. The foot pump keeps it in control.
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The piston pops out after awhile. To remove the other piston I used a piece of silicone rubber and a thick copper disk to seal the opposite cylinder.
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With the open cylinder sealed, the pump is connected to the caliper brake line again and pumped until the other piston pops out.
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I used ethyl (denatured) alcohol and a soft brush to clean the pistons. Over time they collect a lot of rust deposits and other grunge. The alcohol loosens it all really well.
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Seating the piston seals into the cylinder groove.
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Two clean pistons. I tried electro-cleaning one but that was a disaster. The hard part was cleaning the inside of each piston.
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The stamped metal piece has to fit before the piston gets pushed in since you can't turn the piston once it is seated.
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This one looks about right. The stamped piece can be removed so the bellows can be installed.
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That's one caliper complete. I still have to get the pins for it and put the brake pads in.