1991 Ford F-150 Master cylinder

Hi there,

Bench bleed it first, put it in a vice and fill reservoir, with the push rod depress the piston, hold fingers over fluid ports and release piston, keep ports blocked till piston is released fully or you will draw in air again, do this till good stream of fluid on down stroke id visible, fit cylinder and bleed all wheels, depress pedal open bleeder and allow fluid to expel close bleeder before releasing pedal, do this at each wheel until no air bubble are seen, it is handy to use clear hose and a glass jar to bleed into so it easier to see the air bubbles.

Mark (mhpautos)