I pulled the pistons of my TRP HY/RD because both calipers had a piston that out unless the other to clean and grease.
Now I do not get bleed! I tried opening the tank as shown in the YouTube video and also with the bleeding kit as instructed by the manual.
Now I do not get move the pistons pushing the pump. I read something about air bubbles on head of pistons that can not be eliminated, but the truth is that there is very little information on these calipers.
Someone has encountered the same problem?
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Impossible Bleed TRP HY/RD