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Hi i have just replaced master cylider and put a kit thro the rear caliper on my harley ,it bleeds up but when you go for a ride i loose my brake it has no leakes and no air in the at all as it has been bleed alot ,the pedle goes hard but when you go for a ride you loses the brake ,you can pump it up as you are riding and it pumps up good but when you let it rest yhe brakes go away please help

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  • Henning Simonsen
    Henning Simonsen Apr 20, 2013

    i have just been told that they shake when i apply them ,by my wife she said she notice them when i went on my last ride

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There may be air in the system, also may be out of adjustment, or could have a warped rotor. do the brakes shake at all when you apply them?

Posted on Apr 20, 2013

  • 3 more comments 
  • Henning Simonsen
    Henning Simonsen Apr 20, 2013

    hi jason my wife just told me she notice it shakes when i apply them ,when i went for my last ride

  • Jason Snoddgrass
    Jason Snoddgrass Apr 20, 2013

    Ya if the rotor is warped it pushes the caliper back in and you will have to pump up the brakes to get them back. I would have the caliper turned or replaced this should help.

  • Henning Simonsen
    Henning Simonsen Apr 20, 2013

    what do you mean by getting the caliper turned ,if the rotor is warped should only have to replace the rotor ,.,.

  • Henning Simonsen
    Henning Simonsen Apr 20, 2013

    hi jason not real sure what you mean by getting the caliper turned ??? ,if the rotor warped i would only need to replace the rotor i would think but not sure .,.

  • Jason Snoddgrass
    Jason Snoddgrass Apr 20, 2013

    Ya just replace the rotor.

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The brake hydraulic system is fairly simple, with a fluid well, pump, and piping and slave cylinders. You have checked the system fairly correct, but did not indicate a time related hydraulic action.
After pumping up the system, and it feels positive, hold your foot down for a while. Does it feel like it moving down:? If so, then your master cylinder has a internal bypass leak. This condition, will give you false readings and loss of brakes.

Posted on Apr 20, 2013

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motor1258
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SOURCE: back brake lines wont bleed on 77 chevy truck

Check out this link & read about combination valve & how to center it when bleeding.

http://www.autozone.com/addVehicleId,1321403/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c1528007a632

Posted on Jan 23, 2009

c17hydro
  • 2984 Answers

SOURCE: 1996 PLYMOUTH VOYAGER SOFT BRAKE PEDAL AIR IN LINES

I am a hydraulic technician and I can tell you that air is a killer in the hydraulic system.

Start from the rear and work your way forward. I f you are using the two person method, make sure the second person keeps the master cylinder full. If the fluid level dropped anywhere in between pressing and releasing the brakes....you have a lot of air in the system.

Make sure you are tightening the bleed valve when the brake pedal is full pressed.

Remeber...start from the rear brakes first, then do the front.

Posted on Mar 16, 2009

  • 139 Answers

SOURCE: bleeding brakes

always bleed front driver side first, front right,left back
right back.
make sure you always have oil in the master

Posted on Apr 09, 2009

  • 1779 Answers

SOURCE: bleed brakes but no pedal

Good! You bled the master cyl. before installation! The proper order of bleeding the lines, is to start with the wheel the greatest distance from the master cylinder. Then work your way to the next greatest distance, and last, the closest wheel. Make sure all air is removed from the lines before you proceed to the next wheel, and frequently check the master cyl. level, because, as I'm sure you know, if you **** in air at the master, you have to start all over again. I'm assuming you don't have a power bleeder, so with a helper do this with car running (make sure it's on safety stands and not going to fall on you!) Pump pedal 3 times, no need to mash the pedal into the floor, just 3 pumps 1/2 way down, hold 3rd pump at half way down level while bleeder is opened, when flow is about to stop at bleeder, close bleeder and repeat til no evidence of any air. Let me know how it goes and if you need any help.

Posted on Apr 21, 2009

mecanica03
  • 902 Answers

SOURCE: bleed brakes on 2003 toyota corolla

i try to help you, firts refill brake fluid container,open purge valve in one wheel front only,wait few minutes when drops fluid, close this valve and open other wheel, same procedure, finally repeat this in each 4 wheels

Posted on Jul 14, 2009

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Thanks for Using Fixya Please let me know How my Solution Helped you by Voting For the Quality of my help.

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