Hy IHBoilermaker, I'm sorry I've taken so long to answer your question but I've been trying to verify info. If your booster has no bleed screws then somewhere along the line someone has replaced it with a newer than stock unit, the original equipment is shown to have two bleed screws. The newer units were standard on newer trucks and the brake bleeding sequence for a single axle is right rear, left rear, right front, left front, I hope that helps, the new booster should be a Midland unit, is that what you have?
