brake proportioning valve

[dooguy]

Originally Posted by RichardJ

How about starting from the beginning.

You have disc/drum brakes? >>existing cab from another chassis<< What do you have?

>>after receiving from a shop who I'm thinking did not how to bleed brakes properly.<< What is the story on that?

yes disc/drum brakes. 72 cab on 71 k20 chassis

brakes worked fine when on 2wd chassis

shop that did body transfer did brake setup/connection

brake wire not hooked to switch on proportional valve when received from shop

when connecting I get a brake lite which after discussing this on this site I decided to check brake actuation on gravel road.

look to have no front brake actuation.

So I am assuming shuttle valve is diverting all braking to rear because it is stuck

can this shuttle valve be recentered by opening bleed valve on front caliper