how the hell do you do it, these ones aren't on the car or anything i can't get the pistons out, they aren't fully seized but i am having problrms getitng them apart!!! how do you do it? compressed air?!?!
thanks Kevin |
I'm assuing you have full rebuild kit so you can split the halves, there should be some piston rings under the dust boot.
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To late for the edit, in addition, so I don't get my ass chewed out, you don't have to split the halves, but it isn't the end of the world if you do.
Compressed air can be used but you have to pad it well and contain the pistons, otherwise one or two might fly out, bounce around the shop, and become worthless. |
you basically just have to fight with them until they come out. just keep in mind that they are a close fit so pull them out as even as possible. the seal kits that i got from mazdatrix didn't have the o-rings that go in between the two halves so i naturally left them together. make sure to clean out all the garbage before you put them back together and not to scuff the sides of the piston.
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We used a bicycle foot pump hooked up to the brake line - I've heard of air compressors used but I wouldn't because of the danger and also calipers are not designed for the pressure. Some of the pistons will come out before the others - when they get unstuck just clamp them once they come out a bit so all the air doesn't escape.
Mark |
i took them apart, i'm not too worried about the orings, they still sit above the flat so it will squish down again, it's just getting the damn pistons out really sucks, i've been prying on them evenly they pop every once and a while, but it's hard to make any progress.
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if i can't get them fixed i'm going to colins house and kicking his ass.
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not without brakes you're not.
If I remember correctly I used compressed air and many many cuss words. But remember to take it easy and go slow and even. |
You need to do the old screw driver trick. Use a flathead screw driver on each side of the piston, with something under it, a exhaust clamp works great. You just need something to hold the screwdrivers at a higher height than the pistons. Then wedge the flat heads in the groove near the top of the pistons, and with equal pressure it will come out with some work.
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put a half inch piece of wood in between the pistons when you pump them out that way they don't go flying everywhere. I kept mine connected to the car so all i had to do was push the brake pedal. But then i just got rebuilt ones because mine were too far gone.
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