I have replaced or rebuilt all the cylinders that were leaking, had the hydrovac rebuilt, new master cylinder that came with the truck. I didnt replace any rubber lines since it was a firetruck and they looked fine. Besides using a pressure bleeder like the manual says, i followed those instructions for bleeding. Adjust for drag, farthest bleeder-in. If the master isnt quite big enough bore would that do it? I never checked the bore, just assumed it was right.
Never had trouble bleeding brakes, this is frustrating me XD
