Quote:
Originally Posted by flatrod
Was a disc/drum brake master cyl installed? I had this problem years ago. Turns out there is a small flapper valve in the ports of the master cyl for drum brakes. Its there to hold residual line pressure for the drum system. Once I pulled the line seat and took the valve out all was good, just didn't have the fluid volume of a real disc brake master cyl.
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Yes, by all means disc brakes use at most a 2lb. residual valve (or none at all). Generally if a higher value valve is used it will cause dragging.