Re: 57 truck brake issue
Take out the residual valves. Most people think that the residual valve is for under floor masters but they are only needed IF and only IF the master is physically below the Caliper or wheel cylinder, not even with or close to or anything but below the master. They prevent drain back so if your lines are getting hot and you use a residual valve the fluid now has no place to go but into the caliper tightening the brake pad until it hits the 5 or 7 lbs and releases.
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