Ok, i put new cables on ,trying to bleed front brake .put new bleeder valve in because it was leaking ,now every time i try to pump up brake it blows the bleeder valve cap off,am i doing something wrong or what ,thanks in advance

 

The bleeder valve cap does not seal the the brake caliper fluid... it is merely a cover to block dirt and grime from getting in the bleeder valve. If it is blowing off and fluid is coming out of the valve, then the valve is not sealing properly. Is it tightened down? It is supposed to be.

 

i just put another new in,tighten it down to tq and then some same thing pump lever come out top of bleeder valve

 

Are you using the correct size and teflon taping the threads? If so then it is likely that the threaads are cross threaded or there is a crack in the caliper. Check size... threads... cracks... and where the valve seats on the caliper.

 

I think that you might have cross threaded your caliper. i did the same thing when I was in a hurry installing a speed bleeder. Fortunately I was going to replace mine with a PM one eventually anyway. I ended up finding a good deal on one off eBay.

 

so your trying to bleed the brakes?...with the rubber cap on?...if i remember correctly, the threads are much lower than the actual bleeding hole...lol (i said bleeding hole)...would seem like air and brake fluid would be forcing the cap off, and you should see fluid in such a case...the bleeder valve would not be correctly installed or not the right one for your ride?

 

Your bleeder valve is not closing. If it is working like it is supposed to, it doesn't have to be very much more than finger tight to seal. Possibilities include: Damaged threads on either the Bleeder Screw or in the Caliper, wrong Bleeder Valve, damaged Seat in the Caliper that the Bleeder Screw seals against. That's about it, other than simply not tightening the bleeder screw properly.