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Creaky pistons at rear, so, pushed them out as far as they'd go without letting in air and cleaned them. As I was pushing the pistons back in and out to make sure they were ok, oil started to come out the underside of the lever. Noes they are empty.
I'm assuming it's game over. But is there any chance that what I was doing forced oil through the seals and perhaps I should have squeezed the lever a tiny bit to open the resevoir first?
They aren't quite a year old (not the new shape).
Re-bleed, bin or fix?
Re-bleed.
You've probably just pushed the pistons back too quickly & forced brake fluid past the diaphram - & it appears to come from the bottom as its the lowest point.
Lube the pistons with brake fluid & clean it up well before re-installing the pads.
Under a year? What is the Shimano warranty??
[url= http://cycle.shimano-eu.com/publish/content/global_cycle/en/nl/index/tech_support/warranty3.html ]2 Years From Purchase[/url] send back before binning