Pop the piston out-clean the piston/bore and the gunk out of seal groove- coat parts with brake fluid-install-bleed-tighten axle nut and with wheel off the ground, you can push or pull the fork tube in or out just enough to free wheel at the sweet spot. Rotate tire by hand while applying the lever on and off till your happy its right on. Generally the right axle head will be flush with the outer boss of tube then tighten the cap down front nut first. Note: You want the cap just snug enough so you can still move the tube.