[Shiny]

How should the pin on a brake combo valve behave? Mine is stuck "in" and I tried bleeding a front line as suggested on other threads, but it did not pop back out .

The valve (iron body used original 71 or 72) was taken apart, cleaned up, and put back together before installing, and I made sure the internals were free. I have a soft pedal, and have bled every wheel repeatedly, with a vacuum pump, with pressure-then-crack, etc., but still not firm. I expanded the back drums, thinking they may have been too loose, but still not right. I pulled the master and tipped it "down" and repeatedly pushed the piston to try and burp it, but no improvement. The vacuum pump had no trouble pulling fluid through all 4 bleeder valves.

How do I diagnose the combo valve? Is there a preferred sequence or method to get it centered?


thanks