Hy Pvmt-Pndr, the hub removal process is the same as a truck equipped with hydraulic brakes, back off the brake adjustment, remove the hub cap, fold back the bearing nut locking tab, remove the wheel bearing adjusting lock nut and adjusting nut, pull off the outer wheel bearing and remove the hub and drum assembly. Air brakes have return springs just like hydraulic brakes and when they break strange things can happen. Wheel bearings can seize and lock the hub up as well, good luck getting things apart.
