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 Can anyone help me about hydrolic brake?

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redzz02
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Can anyone help me about hydrolic brake? Empty
PostSubject: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSat Apr 07, 2012 10:52 pm

hey guys some of you may follow me on youtube and know im building a racer, well i upgraded to 1 inch axle and upgraded my brakes too, they are front brakes off of an rm 85 and im having trouble getting them to work properly i tried bleeding the line and got some air bubbles out but it still wont pump up pressure, its full of brake fluid, the pads move a little bit, but not enough for the brakes to work, any help is greatly needed. my mower needs to be 100% done by sunday april 15! please help if anyone knows anything about hydrolic brakes thank you
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dked41
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 10:46 am

Did you gravity bleed them or pressure bleed them? I have found that a lot of systems need to be bled through the bleeder under pressure to get all the air out, just make sure you don't run the master cylinder dry.
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 10:48 am

I pressure bled them
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dked41
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:10 am

You say the pads move a little but won't hold, it still sounds like an air issue. I had a motorcycle once that needed to be bled from the caliper to the master before they would work. The pads should pump out to the rotor and stay. They don't move much to apply brake. The caliper piston should not suck in all the way when released.
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:14 am

There's no pressure on the master cylinder, you press it in and the pad move less than a s1/16 of and inch and you let it out and It goes back, should I try and reverse bleed the line???
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dked41
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:21 am

If you have access to a presure bleeder I would try it. Did you bleed the master before hooking it up? If not try bleeding the master first, then hook it all up and then bleed the system normally. When bleeding the master you should feel some resistance when it is bled of air.
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:31 am

Alright I'll try that and I'll see what it does thanks alot
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dked41
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:42 am

We have a week to figure it out, keep us posted.
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 11:50 am

If its not fixed by wednesday I'm building my own mechanical brakes, after 6 I can work on the mower so I can try some stuff.
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeSun Apr 08, 2012 10:16 pm

No success but I didn't try long, my dads going to try and get a brake bleeder, I got a lot of other work that needed done though I'm cutting it real close
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redzz02
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PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitimeWed Apr 11, 2012 9:17 pm

either the master cylinder or caliper needs rebuilt on my rm85 brake set up so i ditched that and build my own following the idea of a guy off youtube his channel is wertheroriginal or something close to that its his design
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Can anyone help me about hydrolic brake? Empty
PostSubject: Re: Can anyone help me about hydrolic brake?   Can anyone help me about hydrolic brake? Icon_minitime

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