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Thread: well, the darn thing is out

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  1. #11
    Senior Member pelago's Avatar
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    May 2016
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    easter north carolina
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    BRAKES, HERE IS WHERE I AM AT
    Prefacing this with the statement that being able to stop is a good thing, Magoo will stop.....eventually
    I removed the push rod, I also confirmed that the pedal system is in correctly, I measured the free play that i have before the master cylinder engages and it is 2 1/4" THE MANUAL INDICATES ADJUST THE PUSH ROD TO HAVE 1/2" FREE TRAVEL.... THE BEST I CAN ADJ IS TO LENGTHEN IT AND GAIN MAYBE 1/2" OF TRAVEL, AND YES IT MADE A DIFFERENCE, NOT MUCH BUT IT DID MAKE IT STOP A LITTLE BETTER BUT STILL VERY VERY BAD AND DANGEROUS

    MEASURED THE PUSH ROD AT ITS SHORTEST AND IT IS 7"

    GOT TO HAVE MORE, SO I TOOK THE PUSH ROD TO A LOCAL GARAGE THAT WAS RECOMMENDED AND I WAS TOLD HE WILL WELD SMALL JOBS. WHEN I GOT THERE I SHOWED HIM WHAT I HAD AND EXPLAINED THE PROBLEM AND EXPLAINED MY GOAL AND HE SAID "WHAT JEEP ARE YOU RESTORING A M151?" I SAID "NO A M38A1" HE LOOKED AT ME AND SAID "DAMN I USED TO DRIVE ONE OF THOSE"
    So a welding we did, i had prepared a short piece of steel to add to the end of the push rod, but it was a bit thicker in diameter, he said wait a minute and went into back of his shop and came back in ten minutes with a short piece of steel that was same diameter. he then promptly welded it together and did a great job, few minutes on a grinder and the weld was no longer portruding outside the diameter of the repaired and longer push rod.
    I then said this is great and how much do i owe you and he looked at me and said "semper fi bro, no charge just bring the jeep around when you are driving it" WOW

    LENGTHENED PUSH ROD.jpg


    I went to Kaiser catalog and looked up the push rod, and there were some questions and answers as part of the web page and lo and behold there were comments about the push rod not being long enough..
    now my brake system is all new, lines, wheel cylinders, shoes and drums in good shape, all new stuff. and i tested the system by my son pushing the pedal and watching the shoes move, and only one moved and it took another pump to get the other shoe to move on all four wheels. What is the common denominator to this... THE MASTER CYLINDER... I got out the old one that was shot and the walls for the cylinders rusty as hell. but the pump was at the top, stuck the push rod in and it only when in a little before it engaged the frozen cylinder, then i stuck the push rod in the new master and damn it went in a whole lot (a bunch) deeper???
    something aint right
    went back to the page in catalog and looked again and the push rod for the cj2 is CONSIDERABLY LONGER but in construction and layout it is the same... hmm hmm I wonder

    called kaiser and they had no idea, but mike said it has to be something in the set up of the vehicle and he said that they had sold 843 master cylinders, i then told him about the comments on thepage about the push rod not being long enough? he said now he has no idea what the issue is or how to correct it, told him i had to lengthen the push rod somewhat and see what happends. he agreed

    now here is the plan
    since the pedal at rest is engaged by the return spring i am going to put the lengthened push rod in and measure what has to be removed to enable the push rod to just touch the cylinder piston and then do it again and then shorten the re done push rod to what the master needs. I have the push rod adjusted to its shortest length and will just see what happens
    Last edited by pelago; 09-11-2019 at 06:45 AM.

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