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1974 f250 brake problem please help - Ford Truck Club Forum




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Ford Truck Club Forum > FORD F-250 | F-350 SERIES | SUPER DUTY > 1948-1986 Ford F250 | F350



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  #1  
Old December 12th, 2012, 04:55 PM
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Default 1974 f250 brake problem please help

Hey guys,
Well a while back I put a new front axle on my truck and I converted from drum brakes to disc brakes. I have put on new calipers, a new brake booster, new master cylinder, and new brake lines and hoses. The problem is that im getting very little pressure and I have bled all of my brakes a million times and still very little pressure at the peddle. Every once in a while I will get real good pressure at the peddle and down at the the calipers but then it goes away in about a half hour. I have been checking for leaks but cant find any.Im super confused at this point, does anybody have any advice?

Thanks,
Will



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Old December 12th, 2012, 05:10 PM
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Is the brake booster hissing or anything?? Sounds as if either it's got a bad diaphragm or the little actuation rod between the Master Cylinder and Booster isn't adjusted properly. Only things I can think of.
  #3  
Old December 12th, 2012, 06:50 PM
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Did you bleed them in the propper order? Pass Rear, driver rear, pass front, driver front? Pull the rear drums and look for leaks at the wheel cylinder. When you went from drums to disc, did you change the distribution block? I ask because the way i understand it, disc require a different pressure than drum. Hope this helps.



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Old December 12th, 2012, 08:43 PM
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2 good answers
I can't add


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  #5  
Old December 13th, 2012, 12:35 AM
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No the brake booster isn't hissing and yes ive tried messing with the actuation rod as directed in my manual and still nothing different.I alsow bled the brakes in that order.and good idea Ill check back behind the drum.also no for the distribution block ill deffently try that .thanks guys a lot.ill deffently try this stuff out tomorrow

Thanks agin,
ktm126





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