Use a large socket (same as outer seal size) and a mallet to tap seals in place. Be sure to pack bearings with grease and apply a little grease to the races. Install the spacer, bearings and bushings and then the seal on each side.
Finally, install each spindle. Add some large washers to the threaded end and tighten the spindle nut (without the blade on) and check for smooth operation.
If ok, pump additional grease through the zerk fitting on top of each pulley. Clean up excess grease, remove spindle nut and replace the test washers with the bearing shield, blade, washer and nut.
