i found this for a 1994 ford ranger 2wd i hope this is close enough to what you need
you first take the tire off. then you take caliper off and then the dust cover, then take the codder pin out. Unscrew the bolt and pull off rotor be carefull the front bearings are not held in by a seal so they will fall out when you take the rotor off. To take the rear seal off and get the bearing out go from the front side take something like the end of a wood hammer, stick it through the center and put on the back of the bearing. take another hammer and pound the bearing until the seal breaks loose. Take the bearing out clean all the grease out with an alchol based cleaner then take your new bearings be sure to pack them well and grease up the inside of the rotor and stick the rear bearing in tampered end down and use a block of wood and pound the new seal in and make sure it is level all the way around with the metal. then stick the front bearing in tampered end down and then put your washer on top of bearing. grease the spindle up good and put the rotor back on the spindle and make sure you break the bearing in by spinnig the rotor and tighen and loosen and tighen and loosen the nut about 4 time to break the bearings in. Make sure you put new cobber pin in and put dust cap on and caliper then put wheel back on and you are all set to go.