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1Back to top Go down   Brake lever doesnt return Empty Brake lever doesnt return Mon Jun 24, 2013 10:34 am

nino

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Hi, I have problem with front brake lever. It brakes, but lever doesnt return. The wheel rotate freely but when braking I dont have a free play on lever. Where to look? Thanks

    

2Back to top Go down   Brake lever doesnt return Empty perhaps Mon Jun 24, 2013 11:31 am

ibjman

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Perhaps the bypass port at the master cylinder is plugged with debris? Remove all of the brake fluid from the master cyl reservoir with a squeeze bul followed by a pit of paper towel, till you can see down into the recess at the very bottom. There should be 2 holes drilled from the bottom of the reservoir into the master cylinder bore a tiny one and a slightly larger one. Gently probe down through each hole with a small piece of wire like a miniature paper clip to see if you can clear the blockage in one of the passageways. If so...........refill the (clean) reservoir 1/2 way with fresh clean fluid and VERY GENTLY, pump the lever.....maybe a few bubbles will be seen coming up through the fluid from the piston area.

Be very careful.....when you pull the lever, a JET of fluid may squirt up out of the reservoir at you or get on the paint, etc

    

3Back to top Go down   Brake lever doesnt return Empty Re: Brake lever doesnt return Mon Jun 24, 2013 2:14 pm

nino

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@ibjman wrote:Perhaps the bypass port at the master cylinder is plugged with debris? Remove all of the brake fluid from the master cyl reservoir with a squeeze bul followed by a pit of paper towel, till you can see down into the recess at the very bottom. There should be 2 holes drilled from the bottom of the reservoir into the master cylinder bore a tiny one and a slightly larger one. Gently probe down through each hole with a small piece of wire like a miniature paper clip to see if you can clear the blockage in one of the passageways. If so...........refill the (clean) reservoir 1/2 way with fresh clean fluid and VERY GENTLY, pump the lever.....maybe a few bubbles will be seen coming up through the fluid from the piston area.

Be very careful.....when you pull the lever, a JET of fluid may squirt up out of the reservoir at you or get on the paint, etc


Thanks Ibjman, it was a second seal on shaft. Somehow it get wider and even with stronger spring lever didnt return. I think is time to change both seals in front brake cylinder

Cheers

    

4Back to top Go down   Brake lever doesnt return Empty Re: Brake lever doesnt return Mon Jun 24, 2013 2:41 pm

charlie99

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same thing can happen if you over fill the reservoir
you HAVE to leave about 10mm air in the top of the reservoir


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5Back to top Go down   Brake lever doesnt return Empty Good information Mon Jun 24, 2013 2:50 pm

ibjman

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Ok, thanks for That......more that's good to know

    

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