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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Disc Brake Conversion Problem

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Old Jul 1, 2003 | 02:24 PM
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LBell101
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Disc Brake Conversion Problem

Hi!
I'm just finishing up my brakes on the 67 Ranger. I'm having a problem getting any pedal or brakes. The brakes consist of stock rears, 75 Ford front disc setup and prop valve, Master Power brakes booster and MC.
I've bench bled the MC many times and bled the whole system many times as well but no pedal. I have it narrowed down to the front portion. When I block off both MC outlets I get good pedal. When I block off just the front brakes line I still get good pedal so I'm sure it's in the front.

The front brakes do start to grab as I can feel them grab some when the pedal is pushed. I've tried bleeding with the front end jacked up, the rear end jacked up, and with the MC perfectly level to no avail. They do seem to bleed just fine but no pedal.

Has anyone had this problem? I'm thinking it may be possible that the front calipers won't bleed correctly because the bleeder doesn't appear to be at the very top of the cylinder. I'm thinking I may remove the calipers and bleed them in a perfectly upright position using a board or something as a rotor. Does this make any sense?

Maybe I could seperate the lines at the rubber hose, block them off, and see if I have pedal then. That would eliminate anything but the calipers as the problem, right?

Any other ideas? Anyone been though this?
Thanks!

Larry
www.larryscars.com
 
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Old Jul 1, 2003 | 04:24 PM
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LBell101
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Disc Brake Conversion Problem

Since I'm past my 60 minute post edit time limit .....

Now that I'm looking at these, is it possible to put the calipers on the wrong side?
Possibly the bleeder would be higher up (a little anyway) if they were on opposite sides. Thanks!

Larry
 
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Old Jul 1, 2003 | 05:33 PM
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71swissaqua
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Disc Brake Conversion Problem

I think you can put them on wrong. Also the pencil size rod that goes from the pedal to the master cylinder plunger has an adjustment on it. Not sure how to explain what this adjustment does but I know on mine I had to shorten the rod to get my brakes to release. I used the rod adjustment to make my brakes apply with a shorter stroke. Take a good look at you caliper position though. Pictures would help us determine if they are on correct.
Clint
 
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Old Jul 1, 2003 | 06:02 PM
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LBell101
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Disc Brake Conversion Problem

Thanks Clint!
I think that they are on wrong. There is a 'L' cast into the one I have loacted on the drivers side but I still think it's incorrect. Here's two pics of the pass side.

 
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Old Jul 1, 2003 | 08:27 PM
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Disc Brake Conversion Problem

excellent pics, they are on backwards..
 
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Old Jul 1, 2003 | 08:31 PM
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LBell101
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Disc Brake Conversion Problem

Thanks!
That is good news believe it or not.

Larry
 
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Old Jul 2, 2003 | 02:20 PM
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LBell101
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Disc Brake Conversion Problem

Yep, that was the problem. Swapped them side to side and now have good pedal. Thanks for the help!

BTW, there absolutly is an 'L' cast into the right side caliper. It's pretty small and obviously doesn't mean 'Left'. So be careful.

Larry
 
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