Guys and Gals

Just replaced master which was bench bled and installed also rear wheel cylinders with shoes and drums, Bled system rear to front until no more air. Pedal seems ok but not happy camper yet. Did not note a proportioning valve and truck does not seem to have warning light for brake system. I do not have a shop manual appreciate any comments.

Thanks
Ken 45145

sounds like the proportioning valve went over center, probably when the fluid for the rear brakes went dry when the wheel cylinders started leaking. I've had luck in the past by not having the truck running, push the pedal a few times to get rid of any residual vacuum. The push the brake pedal hard and fast a couple times. Other wise you may have to take the rubber cover off the centering pin on the proportioning valve and then push the pin manually to center it.