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BRINGING IT ALL TOGETHER.... A's, G's & E's


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    Brakes went out

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    Guest
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    Brakes went out Empty Brakes went out

    Post by Guest Fri Jul 01, 2011 6:05 pm

    I wasn't driving it at the time at least. Everything was working fine yesterday. Today I drove it a few miles (5). On the way home it felt like the pedal was a little squishy, but everything was still working fine. It was such a slight difference that I wasn't sure if it was just me or not. I got home and had it parked for about 3 hours. I ran a new wire to the fuel tank sending unit and cleaned it out. Went to fill it up for a camping trip tomorrow and out of nowhere the brakes were completely gone. I do all my own work, and can replace anything, just not great at finding the problem. What should I check, and how?
    SDEconoTruck
    SDEconoTruck


    Number of posts : 310
    Location : San Diego, California
    Registration date : 2010-05-26

    Brakes went out Empty Re: Brakes went out

    Post by SDEconoTruck Fri Jul 01, 2011 7:12 pm

    Look for leaks. Check the backside of the backing plates.

    Fluid loss some place will cause total brake failure. I had a bleed
    screw loose and the pedal was gone.

    Another is a mechanical linkage going bad like the connection
    from the pedal to the master.

    Last, look for fluid at the master cylinder.
    donivan65
    donivan65
    Governor
    Governor


    Number of posts : 12227
    Location : San Diego, California
    Registration date : 2008-05-12

    Brakes went out Empty Re: Brakes went out

    Post by donivan65 Fri Jul 01, 2011 7:24 pm

    Thats right,,,,,,,If the master cylinder fluid level has not gone down,,,,,,,,then the Master Cylinder went bad,,,,,,,
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    Brakes went out Empty Re: Brakes went out

    Post by Guest Fri Jul 01, 2011 7:31 pm

    Found it. Tiny leak at the master cylinder, probably only 5 drops sitting on the belly pan. Guess it finally got low enough to be useless. How hard is it to rebuild the mc? I'd much rather spend 15 bucks on the kit than 100 on the whole thing.

    Also how do I check the level on the mc. This is my first car without a hood. It's also my first vehicle built before 1988. It's kinda like when I switched from PC to Mac. Everything is so simple it confuses me.
    61econoline
    61econoline


    Number of posts : 655
    Location : florida
    Registration date : 2009-04-16

    Brakes went out Empty Re: Brakes went out

    Post by 61econoline Fri Jul 01, 2011 10:08 pm

    theres an access plug in the floor by drivers feet pop it off master cylinder lid is there
    donivan65
    donivan65
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    Number of posts : 12227
    Location : San Diego, California
    Registration date : 2008-05-12

    Brakes went out Empty Re: Brakes went out

    Post by donivan65 Fri Jul 01, 2011 10:15 pm

    ,,,,,,,so I guess you don't check the fluid level too often,,,,,,,there is a hole in the floor under the drivers seat to get to the cover of the master cylinder to see if it is full. If the brake pedal went to the floor, the cups inside the master cylinder could get scored by any corrosion in the bore,,,,,,so there is a chance the master cylinder will fail shortly even if you fix any other leaks,,,,,,,so you can get a kit,,,,,just a couple of rubber cups to put into it,,,,,,HOWEVER,,,,,,,you need to make sure the bore inside it is smooth,,,,,,,run a hone in there to clean it up,,,,,,,


    Brakes went out Ford_m11
    SDEconoTruck
    SDEconoTruck


    Number of posts : 310
    Location : San Diego, California
    Registration date : 2010-05-26

    Brakes went out Empty Re: Brakes went out

    Post by SDEconoTruck Fri Jul 01, 2011 10:40 pm

    Sounds like you isolated the leak. Can you paper towel it dry enough
    to get an eyeball on the exact point of leakage?

    You might want to go for the easier problems first, like a loose line
    fitting that leaked over time until the master fluid level got too low,
    now you're pumping air (ie. no brakes.)

    That said, you got to respect the function of your brakes, if you
    suspect the master needs a rebuild, then follow through with it.
    Just eliminate the simpler causes around it then check for function.
    (if you screw up your brakes, they will screw with you...)
    Sy Hollinshead
    Sy Hollinshead


    Number of posts : 466
    Location : Cambridgeshire, UK
    Registration date : 2008-10-11

    Brakes went out Empty Re: Brakes went out

    Post by Sy Hollinshead Fri Jul 01, 2011 10:59 pm

    5 drops of brake fluid shouldn't cause you any major problems. I would be checking elsewhere for leaks as well....

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