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Old 05-20-2013, 04:15 PM   #1
studeystudebaker
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Join Date: May 2013
Location: altoona iowa
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studeystudebaker

I have a 78 chevy one ton chasis,rear brakes have been converted to disc---recently the rear locked up,they would release if engine not running,they have the e brake calipers-so I disconnected the e cable ,no difference---so I drove it a few miles with the brakes dragging only the rear,they releasted after setting,next morning I pushed the the little pin in proportional valve-they work ok now ,but not sure what caused it,could it have been that valve--??? don't want this to happen again-- I have been driving it for 6 months--thanks. cab is a 48 load master 5 window,frame 78 one ton-engine 4bt cummins----
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Old 05-20-2013, 09:41 PM   #2
LONGHAIR
just can't cover up my redneck
 
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
Re: studeystudebaker

What master cylinder are you running? One intended for drum brakes would have a residual valve that keeps pressure on the wheels cylinders of the drum system. That helps to prevent a low pedal and gives faster response to the pedal too., but it's bad for disks. Since there are no springs pulling them back from the rotors, they just drag.


In a totally unrelated thing, did you get your name from the pulling truck?
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Old 05-21-2013, 08:09 AM   #3
studeystudebaker
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Join Date: May 2013
Location: altoona iowa
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Re: studeystudebaker

I had several Studebaker trucks---when I first started with you tube-studeystudebaker50 was all that was available-finally I dropped the 50-I have about 30 videos on you tube-several about the two stroke detroits----on the master cylinder,is there anyway to get the calipers not to drag so tight----to fully release- this is my first experience with disc---all my old stuff was drum----I posted several pictures of my truck-----can't find them---where should I be looking

Last edited by studeystudebaker; 05-21-2013 at 08:26 AM.
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