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Thread: Bleeding disc brakes

  1. #1
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    Default Bleeding disc brakes

    Got my empi disc brake kit on my trike today. Does ok but I don't have the pedal I think I should have. I mounted the calipers on top of the axle. I can't tell if there is any air left in the lines. I am going to bleed a little more tomorrow. I didn't start at the master cylinder. I bled the brakes at the calipers. Any suggestions.

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    6500+ Posts Jack Klarich's Avatar
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    Pump the pedal up using short strokes, Strap the pedal down, let it sit a few hours

    Crack the bleeders open slowly, the air should be all gone

    Keep the master topped off during bleeding
    Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 31years)
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    Default bleeding disc brakes

    I will try that. Seems I have also read you can gravity bleed brakes. My master cylinder is higher than my calipers. Wonder if I could just crack the bleeder screws and let it bleed itself. I could also jack up the front of my trike to where the master cylinder is a good bit higher than the calipers.
    Quote Originally Posted by Jack Klarich View Post
    Pump the pedal up using short strokes, Strap the pedal down, let it sit a few hours

    Crack the bleeders open slowly, the air should be all gone

    Keep the master topped off during bleeding

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    The only luck I have had with gravity method is to get the lines filled and everything wet. That way it is all ready to bleed.

    Sounds like you are past that point.

    Some air will find it's way to the highest point once you let it sit for a while.

    You might could pick up an end to make a bleed nippil closer to the top of caliper.

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    I don't think the master being higher than the calipers has anything to do with it. The master cylinder is higher on almost all applications. Do the calipers have parking brakes in them. It can make a difference if you got them out of adjustment.

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    Default Bleeding g disc brakes

    No emergency brake. I try a little more the conventional way. I think I can get it better.

  7. #7
    300+ Posts LarryA's Avatar
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    All I can add, is to really take a good look at where the bleeder screw is.....mine looked to be on top.....no luck bleeding at all....noticed the internal tip of the screw was off the the side making a chamber that trapped air when the calipers were bolted to the spindles.

    So I took the calipers off and rotated them to bleeder up position, while keeping the disc in place..... 1 stroke on each caliper, brakes bled.

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    6500+ Posts Jack Klarich's Avatar
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    Quote Originally Posted by LarryA View Post
    All I can add, is to really take a good look at where the bleeder screw is.....mine looked to be on top.....no luck bleeding at all....noticed the internal tip of the screw was off the the side making a chamber that trapped air when the calipers were bolted to the spindles.

    So I took the calipers off and rotated them to bleeder up position, while keeping the disc in place..... 1 stroke on each caliper, brakes bled.
    Very good point

    I had a tech working for me that hung some calipers

    Only problem was they were wrong side to side

    Yup the bleeders were on the bottom

    I laughed, and said how ya going to get the air out

    Now say you had a broken or stripped bleeder

    Take the caliper off, put a C clamp on the piston ( pistons)

    Turn the caliper upside down

    The hose with a banjo bolt or ( if the hose screws into the caliper) is the highest point to trap air

    You can bleed the air out thru the banjo bolt or the hose
    Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 31years)
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    300+ Posts LarryA's Avatar
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    good to know! there is more than one way to skin a cat! lol maybe this saying isn't appropriate anymore.

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    Default Brake bleeding issues

    Hi I ride to and do the odd repairs for others and I find trike brakes trickey, just a few point about calipers how many pistons do you have mine has 4 so I fitted an extra bleeder to make sure that both side of the caliper are bled, secondly I never do a manual bleed, I always use a pressure bleeder as it forces the air out of the place a manual bleed can't.

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