Actually i tore up a Shimano m 545 caliper...
For a clean up and i ended up with a question !!!!
This is the Square ring ( seal ) that seals round the pistons....
One side has a grove on the other doesnt but at the moment i was getting it out i didt pay attention which side the grove was at .!!
Actually it wasnt like that i didnt pay attention....i was more like that i wasnt aware of its presence ....
According to my own hydraulic experience i thought the grove must face the outer face of the piston ( meaning towards the pads ) ..leaving the un grovved face to fully seal the fluid
but that was only a guess !!! Any body can help me ?
Was i right ?
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Shimano Piston seal