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Thread: Brake Boosters Required for Bushwheels?

  1. #41
    hotrod180's Avatar
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    Quote Originally Posted by Carey Gray View Post
    ...Filling from the bottom works great for bleeding, but after the brakes are bled I just fill them from the top. It's easier and not as messy.
    I top off the brake on my C180 from the bottom up --
    for me, it's quicker & easier than crawling under the panel and fumbling around.
    Cessna Skywagon-- accept no substitute!

  2. #42

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    i top my north rivers or take some out which is very seldom needed with these.https://www.ebay.com/itm/X5-Small-1m...BD:rk:23:-Pf:0

  3. #43

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    Quote Originally Posted by hotrod180 View Post
    I top off the brake on my C180 from the bottom up --
    for me, it's quicker & easier than crawling under the panel and fumbling around.
    What I don't like about filling from the bottom is that you have to be pretty careful not to squirt some air into the system and make things worse.
    Don't you still have to get under the panel to take the plugs out of the master cylinders?
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  4. #44
    behindpropellers's Avatar
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    I always vacuum mine from the top. No air bubbles.

  5. #45

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    Quote Originally Posted by Carey Gray View Post
    What I don't like about filling from the bottom is that you have to be pretty careful not to squirt some air into the system and make things worse.
    Don't you still have to get under the panel to take the plugs out of the master cylinders?
    Cessna masters are vented. If you don't toss a rag over the masters they'll pee straight up in the air like a baby boy when you pump from the bleeders.
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  6. #46

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    Too funny. Now I have this visual...

  7. #47
    Eddie Foy's Avatar
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    One of these in place of the vent plug with a tube into a jar eliminates the peeing.
    Click image for larger version. 

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    Quote Originally Posted by stewartb View Post
    Cessna masters are vented. If you don't toss a rag over the masters they'll pee straight up in the air like a baby boy when you pump from the bleeders.
    "Put out my hand and touched the face of God!"

  8. #48

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    A rag is easier. A rag with a little brake fluid is great for wiping down the belly, too.

  9. #49
    Eddie Foy's Avatar
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    Can't argue with that logic!

    Quote Originally Posted by stewartb View Post
    A rag is easier.
    "Put out my hand and touched the face of God!"

  10. #50
    cruiser's Avatar
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    The vent plug is a straight thread not a pipe thread

  11. #51

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    My rags are cotton thread.
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  12. #52
    Eddie Foy's Avatar
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    Stright thread barb fittings are available.
    Quote Originally Posted by cruiser View Post
    The vent plug is a straight thread not a pipe thread
    "Put out my hand and touched the face of God!"
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  13. #53
    Steve Pierce's Avatar
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    These dam Cessna guys posting on a Super Cub site are making my head spin. Scott brakes use a straight thread, I made the fitting to bleed them. Cessna uses A tapered pipe thread.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers
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  14. #54
    hotrod180's Avatar
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    Quote Originally Posted by cruiser View Post
    The vent plug is a straight thread not a pipe thread
    My C180 master cylinders have plastic pipe plugs, with itty-bitty vent holes.
    They don't really tighten up like a pipe thread should though, more like they bottom out.

    Quote Originally Posted by Carey Gray View Post
    What I don't like about filling from the bottom is that you have to be pretty careful not to squirt some air into the system and make things worse. Don't you still have to get under the panel to take the plugs out of the master cylinders?


    I have an oil pump can full of 5606 fitted with some clear plastic tubing,
    pretty easy to squeeze the bubbles out before attaching to the bleeder on the caliper.
    I do remove the vent plugs, but other than usually dropping one into the bilge that isn't too bad--
    it's trying to get the bleeder hose down into the master cylinder and pump some fluid in,
    all while laying on my belly under the panel and fighting off a charley horse in my cramped-up arms that's the problem.

    Cessna Skywagon-- accept no substitute!
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  15. #55

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    Quote Originally Posted by Gordon Misch View Post
    I have stock Scott diaphrams and Bodell wheels/brakes on my PA-12. The combination is "good" with 8.50's, "adequate" with 26" Bushwheels, and a bit marginal with 31's.
    Hi Gordon,I see you have the original Scott brakes fitted.Can you offer any advice re changing diaphragms,and longevity of such.Thanks if you can help.

  16. #56
    Gordon Misch's Avatar
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    Quote Originally Posted by ron View Post
    Hi Gordon,I see you have the original Scott brakes fitted.Can you offer any advice re changing diaphragms,and longevity of such.Thanks if you can help.
    I don't have any advice that might be considered sophisticated, but - - I've owned this plane for more than 45 years, and have changed diaphragms twice. Once because one ruptured on a short gravel bar. That was entertaining! Seems to me that they're good until they're not? Some of the mechanics here will have better, more detailed information for you.
    Gordon

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    My SPOT: tinyurl.com/N4328M (case sensitive)
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  17. #57
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    Quote Originally Posted by Gordon Misch View Post
    I don't have any advice that might be considered sophisticated, but - - I've owned this plane for more than 45 years, and have changed diaphragms twice. Once because one ruptured on a short gravel bar. That was entertaining! Seems to me that they're good until they're not? Some of the mechanics here will have better, more detailed information for you.
    27 years of Cub flying and I have never blown one. If you keep them pumped up they hardly stretch at all, it's when you let the fluid get low that the diaphragm has to travel farther and gets weaker each time it has to stretch that far

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  18. #58
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    I am using these bleeder valves on my Cub with Clevelands. Topping the Scott cylinders with fluid and thereafter bleeding the system is just easy with them ...
    http://www.stahlbus.com/products/en/...stem/index.php
    Thanks ron, fancypants thanked for this post

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