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Fino's 58 Wagon

Discussion in 'Builds and Fabricators Forum' started by FinoCJ, Aug 10, 2019.

  1. Apr 15, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    How much brake pedal do you have? When bleeding does the pedal go down quickly and all the way to the floor?
     
  2. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    No anti seize. The bond in the taper is a pain to deal with when separating, but without it, the connection will spin and put all the torque against the key and either shear the key or crack the hub.
     
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  3. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    So if you only open the bleeders on the passenger’s side and have someone step on the brakes, nothing happens?

    If that’s the case, have them keep pressure on the pedal (or jam a block of wood between the pedal and dash or seat) while you go under and crack the fittings along the lines until they squirt fluid, starting at the MC and working your way back to the wheels. Sometimes the air doesn’t build enough pressure to move itself out of the end of the line. It just acts like a long spring and would rather push fluid back and forth at the MC end. Sometimes you need to work the air out a section at a time. If nothing else, it will pinpoint where the fluid is stopping.
     
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  4. Apr 15, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    This has me wondering about push rod adjustment.
     
  5. Apr 15, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Also the bleeder has to be closed before the pedal is let up. Make sure a helper understands this.
     
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  6. Apr 15, 2020
    Fireball

    Fireball Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Pullman, WA
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    A vacuum or pressure bleeder would help if you have too much air in the lines for the pedal to push it out. Speed bleeders can also help with that.

    Having the assistant pump the pedal at least 3 times before opening the bleeder can help build up more pressure in the lines. I've also put a finger on the end of the bleeder hose to act as a check valve and had the assistant pump the pedal like crazy for a bit to move things through the system.

    You can get a vacuum bleeder from Amazon or Harbor Frieght for $40.00:

    Another possibility is bad brake hoses. They can swell up on the inside and essentially be blocked. Seems unlikely in your case since there 's only one hose in the back and you're getting fluid out one side.
     
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  7. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    I know - what are the chances of that....but we've all seen other unlikely stuff....

    i've checked this so many times - its like checking plug wires from cap to plug - I've somehow probably become blind to the mis-connection. My inability to sleep at night is this...Somehow the left side is plumbed together and is working fine, and the passenger side is plumb together and the MC is not bled properly for that circuit to work....But the line that goes to the left rear only splits from the right rear at the rear axle - its pretty trivial. Although I didn't disconnect the RR line coming out of the junction block at the rear axle, thinking of do so to to see if I can get fluid squirt out of the block - there is obviously fluid going into the block if it gets out

    to the left rear.
    kind of like to try that...
    and you can get C19 for free while your at it...

    I understand no Prop valve needed either...there are removeable RPVs in the MC ports, but that should be correct for drums (as ordered from Richard at R&P). They are supposed to be removed if I go to discs at some point...even if they were wrong, they shouldn't stop fluid from going out - just backpressure and backflow when pedal is released...

    Correct - but haven't had both bleeders on the passenger side open at the same time...just one or the other.
     
  8. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    Talking about the key...it has a taper on one end...is it directional, or is its orientation important?
     
  9. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    Try this. You might not be getting enough pedal travel by only having one open.
     
  10. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    this is all I know to do...except I was working back from the wheel cylinders toward the MC...not so much to work the air out one section at a time, but more to see where I find fluid pressure. Might be better to do it your way.
     
  11. Apr 15, 2020
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Naches, WA
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    After rereading your brake system installation, I believe you are just fighting an air blockage problem in each circuit. I would deal with each circuit individually and fix that problem before addressing the other circuit. Since you have good fluid flow at both front and rear left wheel cylinders you effectively have proven that there is no blockage in the primary distribution lines. At the right front wheel, is the flex line in good condition? If so, I again believe air is trapped somewhere in the front circuit. At the right rear, basically the same thing from main line junction block to right rear wheel. If good, I again believe air is trapped probably at a high point in the circuit. A vacuum bleeder may help.
     
  12. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    If you put the key in the wrong way, it will bottom out and tightening the nut will crack or eg-shape the hub.

    A good practice is to put the hub on the shaft, then slide the key in. If it doesn’t go all the way in, flip it until it does.
     
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  13. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    having to think about this a bit...I wrote my thoughts, then deleted as I don't think i get the why. But its easy enough to try....
     
  14. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    There are two circuits being actuated by one rod. If one circuit is meeting resistance by being blocked, it might not allow the plunger to move far enough to move enough fluid in the other circuit to be effective. Because you have air in both circuits, this is probably unlikely to help, but you never know. Best to remove any variables until you find the issue(s).
     
  15. Apr 15, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Am I reading this right? Are you saying you have a left side circuit and a right side circuit? Not front and rear?
     
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  16. Apr 15, 2020
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    +1
    Need clarification. Because...
     
  17. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    No its set up a front and rear circuit - my recurring nightmare is that I somehow plumbed them as a right and left side circuit.....I've checked it 100times, and its front and rear, but as the both left sides bleed, and neither right side works - it just keeps popping into my head that I cross-up the circuit connections...Almost finished with morning teaching responsibilities - go work on it some here in a bit.
     
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  18. Apr 15, 2020
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    I feel better now. :) Now back to the regular scheduled troubleshooting. Does it have an adjustable push rod? If so is it adjusted to give maximum throw?
     
  19. Apr 15, 2020
    jeep peep69

    jeep peep69 Member

    redding ca.
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    First quit beating yourself up from all descriptions you have a air lock in the system the right side being the farthest from the master cylinder is why your having difficulties getting it out. If you have a vacuum pump start at the right rear pulling fluid through. If you don’t have a vacuum pump or access to one start at the master cylinder and crack open each fitting one at a time till you have worked your way to the right rear last just loosen the fitting enough that a little fluid come out maybe a teaspoon if that much. This should help eliminate any air pockets then bleed in a normal fashion starting at the right rear. Hope this helps .
     
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  20. Apr 15, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member

    Bozeman, MT
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    Some follow-up: Check MC pushrod - its adjusted correct with 1/2" of play in the pedal before moving the MC and the pedal is able to go to the floor. Tried 'bleeding' both right side cylinders at the same time - nothing....maybe an ever so slight drip or so. Tried some various ways to pump up the pressure and the open the bleed valve but nothing. There are a couple high spots in the lines where it bends over the motor mount sections that could definitely have air bubbles - possibility in the front line, but the rear line gets fluid all the way to the left rear so not an issue in that one.

    Pic is of the rear circuit T-junction...rubber line comes in from MC, the split to the left goes to the driver side which is bleeding lots of fluid. So I pulled the line that goes to the right side and confirmed I am getting lots of fluid out the junction. I then cleaned out (sprayed brake cleaner) through the short section of hard line and then blew it out with air...After reconnecting the hard line to the block, confirme I was getting lots of fluid out of the hard line at the connection to the wheel cylinder. But still no fluid out of the wheel cylinder...Even if I pull out the bleed screw - nothing. I can't really examine the wheel cylinder with it on backing plate, so that is the next step - pull the wheel cylinder off and see if I can flush it out with brake fluid and air (I assume the there are internal rubber seals that would not react well to brake cleaner). Is it possible to have the wheel cylinder pistons too far in or out that they could be blocking off the bleed valve? The shoes are moving some bit when the pedal is pushed (and bleeder is closed). Even if its not the cause, starting to think I should replace the rubber hose connectors - two on the front and one on the rear - in case they are expanding internally as pressure builds....even if not, I don't want to be doing this again.
    [​IMG]
     
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