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Brake lever has no travel

Old 07-28-17, 12:48 PM
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Brake lever has no travel

Hi, my front brake lever has hardly any travel & the pads have started to constantly rub against the disc, what would be the cause of this ? thanks in advance for answers
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Old 07-28-17, 12:51 PM
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Hydro or mechanical? Did you happen to have the wheel off recently and accidentally pull the lever?
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Old 07-28-17, 02:57 PM
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Hydraulic & no I have not had the wheel off
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Old 07-28-17, 03:08 PM
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possible issue with the lever cylinder, a blocked return passage... flush/refresh the fluid in the system.

might be air in the system, and you just need to bleed the system... gotten the brakes real hot recently?

might be that the caliper got hit, and has shifted... loosen the mount screws, then grab the brake lever fairly hard, and then re-tighten the mount screws.

you might have a bent disc... spin the wheel. watch for wobbles.

you might have dirt around the piston in the caliper... the piston will move outward when you apply the brakes, then is not able to release! the ONLY thing that makes that piston move back to the "open" position is the square profile SEAL, and they don't have a lot of force to lend.... the seal goes from square, to parallelogram shape, then flexes back to square when you release the lever... yah, no spring, just that tiny square seal, and any "out of true" present in the disc/axle/bearings.... add some dirt, and it won't release enough.

and trashed axle bearings can cause brake drag... checking for that should be a daily pre-ride check... as should checking for a bent axle.... hit any pot holes lately? flinging yourself off of cliffs for fun and excitement, perhaps?

check the caliper alignment first......

Last edited by maddog34; 07-28-17 at 03:12 PM.
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Old 07-28-17, 03:11 PM
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Thanks I will flush the system & see what happens.
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