Should be nice and smooth, hopefully your pistons are still ok
which is why i tried a new set and same issueDon’t think you should ever reuse the seals.
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well they are smoothish. They just look, to me anyways, like theyve been media blasted and im almost certain thats something that shouldnt be done. I can see actual pitting in the aluminum. Something just seems off and im trying to get my ducks in a row before I show up there complaining.Ahh. Gotcha.
Should have very clean and pretty smooth bores.
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I agree completely they should have been sealed off. Did they? I dont know for sure, what do the pictures suggest?Definitely shouldn’t have been media blasted. I’m fairly certain they usually seal off the piston bores prior to any medial blasting or coating.
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Thanks, i just wanted some confirmation someone else saw it before I raise hell.Looks like they are blasted or pitted.
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I completely agree, hell will only be raised if we cant some to some kind of agreeable terms. This place was supposed to be highly reputable in my area. I would think that I should not settle for less than a replacment of the calipers at very least.Good luck.
Shops hate accusations. Sometimes they really don’t know what they are doing but want to do the work, get paid, but perhaps should pass.
Not saying this happened here, but craft your comments to them carefully. Think before you talk with them about what are the facts, what is a reasonable outcome.
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Ive rebuilt many hydraulic cylinders but this would be my first caliper rebuild. Im slowly figuring out my issues may be from the pitting on the wall. I really wish i would have noticed this a while ago. Thanks for your reply man.Have you ever rebuilt calipers before? Usually the seal is created between the piston and rubber seals, then on the seal and the inside caliper wall. If a surface is too rough then you’ll have the leaks your talking about. Good luck
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That’s definitely been media blasted. You can try to hone the cylinder. They make brake hones. Or maybe have them agree to have calipers rebuilt before replacement and find a competent shop to give you a quote before you raise hell?Ive rebuilt many hydraulic cylinders but this would be my first caliper rebuild. Im slowly figuring out my issues may be from the pitting on the wall. I really wish i would have noticed this a while ago. Thanks for your reply man.
Good point. I should have clarified the need for oversized pistons.Hydraulic actuators handle high pressure. A rubber seal isn't going to keep the fluid from leaking past. So that's not what the seals do. The bores should be smooth, polished even. It's the close tolerance between the piston and the bore that provides most of the "seal". The seals themselves are mostly just to keep crap from the environment from getting in to the assembled piston/bore.
I don't know if anyone sells oversize pistons you could buy, and then hone the bores. Honing alone isn't going to fix the problem because the tolerances are already "opened up" and honing is just going to remove even more material making the tolerances worse.