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Old 12-05-2010, 04:11 AM   #5
old man jimmy
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Join Date: May 2007
Location: texas
Posts: 329
Re: Proportioning Valve

Quote:
Originally Posted by Critter View Post
Maybe I'm an idiot but I have never pushed that to bleed brakes in all my 20 years of bleeding brakes. I have heard of people doing it but never really knew why. The only reason I ever used that "button" was to reset the piston to a neutral position in the event that something went wrong aka a broken line, bad caliper etc. Here is a diagram just for the heck of it.
I'm with you. I never use it either. Most of the time a few pumps on the pedal after the problem is fixed is all it takes to center the piston.
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