I’m having problems with my TRP dhr evo caliper. Seems like the one side of the pistons is more engaged than the other. Any reason why and tips?
by jpwalker-
I’m having problems with my TRP dhr evo caliper. Seems like the one side of the pistons is more engaged than the other. Any reason why and tips?
by jpwalker-
5 Comments
Hydraulic systems will fill the space you give them. The outer pistons might be a bit sticky or dirty. I’d pull pads, give the pistons a clean with a qtip + brake fluid and then press back in. Put pads back in, mount without torquing the bolts down, pull brake lever and tighten whilst you pull to re-center. A little difference is nothing to worry about but that’s pretty significant.
As they are centered on the disc could it be the caliper is offset and the pistons are just reflecting this.
Search for sticky piston fixes. YouTube has a bunch of videos. Usually happens because of dirty pistons.
A common mistake people make is pushing the pistons in before cleaning them. This can damage the seals and pistons and basically require a rebuild.
It can also be due to trapped air on one side of the caliper.
Your rotor isn’t centered inn the caliper, thus the pistons *can’t* be equally extended. Retract both, center the caliper.
I think the caliper is not entered. Even if one side is sticky, it will become apparent then the brake is disengaged.