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Most likely the bladder is damaged or out of place and it's going through the vent hole. I'd try that before replacing banjos and hoses.
Netakure-
I tried my hand a rebuilding the lever and fit new bladders. Master cylinders were phish. Made them work again with generic o rings from the car shop. Put everything together, fasten banjo with torque wrench, and the fucker doesn't even tighten down hand tight. Looks like some asshole that "serviced" it before in the shop over-tightened it. Of course I can't prove that or anything, but no wonder it kept seeping. The threads came with it when I unscrewed it to check. This is the plastic body of the lever that the banjo screws into.
Very upset now. Any thoughts on how to recover that instead of throwing out the whole lever?
pascalo
SRAM 1x11 hydraulic road lever is seeping dot fluid just under the hood cover . Decided to rebuild them. Have acquired reservoir and top cap spares. The other thing I can think of is banjo bolt O rings. But I can't find them as spares. Does this mean I have to buy whole new hose kits at like $65 a pop, or does anyone know O ring replacement parts?