My bike looks to have started leaking mineral oil when using the brakes. It’s been less than a year since I first got it, should this be covered under warranty? If it’s a quick fix I’m happy to do it myself
How to stop leaking hydraulic fluid?
byu/toxical45 inbikewrench
by toxical45
3 Comments
No quick fix. Needs an olive and an Insert pin.
Then rebleed the whole system.
And check if it is not the STI itself.
You have to cut a small part of your break line.
To remove the old insert pin.
Then check the length of the breake Line.
Please go to a shop to do it!🙏
I’m gonna say differently than the other comments but seems like a diaphragm issue to me. Cheap and easy fix, order the 2€ bladder, take the bike to your LBS for a bleed, and you’re good.
About the warranty, it’ll most likely not be covered. The bladder is considered a wearing part, is fragile and can easily be damaged (when pushing the caliper pistons apart for example, or a badly executed bleed)
You’ve burst the bladder in the reservoir. This happens when you push the pads back too aggressively. You need a part called ST-R9120 Lid unit. They have left and right sided ones. Lay the bike on it’s side so the leak is facing up, undo the 3 torque bolts, pull the lid off and the bladder out, pop the new one in and bolt it down. Make sure to use the 2 silver spacers underneath 2 of the bolts. You probably won’t even have to bleed the brake.