Hi All.
Anyone have experience removing the brake pistons from the main body so the o-rings can be checked/changed?
Thanks.
Mike ,Onex 080
You want to remove the pistons’ not the pucks? I’m interested to hear about this - never heard of anyone doing it!
I’ve done a lot of motorcycle calipers. Should be similar. Restrain one all the way in, use compressed air to pop out the other. Need to restrain the other so it can’t shoot out - potentially dangerous or damaging. Remove the o-ring. Now restrain the other side all the way in and pop out the other. Should be easy to get the first one out with no o-ring. The pads just pull out really easily.
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Hi Robbie and Bryan. When I removed the wheel to inspect the brake pads ,I found brake fluid in and around the brake pucks so I assume the o-ring is allowing fluid to leak. I was hoping for some trick to remove the piston without removing the brake line but alas i think I will have to do as Bryan suggests and use compressed air blown into the brake line fitting.. Thanks
Mike
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Throw a towel over the assembly when using compressed air - they shoot out like a bullet.
Bill N67WX
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My motorcycle calipers have 4 pistons, two on each side. I was able to put a piece of wood between the pistons and the other side to only let them go most of the way. That’s a lot harder in the Sonex design. The towel is a good idea, or put the wheel on but let the nut out enough to allow the pistons to come most of the way out.
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Thanks guys. will give it a whirl tomorrow.
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Successful removal of the brake pistons using the compressed air method. Of note the piston closest to the inlet popped out (like a bullet as noted above in the cautions) but the farther piston remained in. Only after replacing the o-ring on the first piston and installing it would the second piston come out by holding the first piston in by hand as air was applied.
Thanks again .
Mike
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