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western star · 07-21-2003, 10:24 PM

My dual master cylinder has what I believe to be a proportioning valve on the bottom front of it. It has a little rubber boot over it. I changed a rear brake line and the fluid level dropped out of site. After filling it I made a brake application to bleed the brakes and have no air or fluid coming out of the back line. Would this valve trip some how so as to supply bakes to the front in case of failure and if so how do you reset this valve so as I can bleed my brakes. It's on a 71 Chev 1/2 ton with front discs.

07-21-2003, 10:24 PM	#1
western star Registered User Join Date: Mar 2003 Location: Victoria BC Canada Posts: 198	Resetting a proportioning valve My dual master cylinder has what I believe to be a proportioning valve on the bottom front of it. It has a little rubber boot over it. I changed a rear brake line and the fluid level dropped out of site. After filling it I made a brake application to bleed the brakes and have no air or fluid coming out of the back line. Would this valve trip some how so as to supply bakes to the front in case of failure and if so how do you reset this valve so as I can bleed my brakes. It's on a 71 Chev 1/2 ton with front discs.