Hi Ken,
Great job!!
You will need to cleanup both the hub ID and the motor shaft enough so the hub will slide onto the motor shaft with minimum effort without the key installed, and a little more effort with the key installed.
You will need a half round file the round of which has a smaller curve than the hub ID and some 200 and possibly 400 grit wet or dry emery paper.
You will need to remove the key from wherever it stuck to if it didn't fall out.
With the curved part of the file, cleanup any high and or rough spots in the hub bore to include the edges of the key slot. The same needs to be done to the motor shaft with the flat side of the file and finish both with the emery paper. I sometimes cut pieces of the emery paper to fit over the curve of the file to cleanup the hub bore and cut 2" wide strips of emery paper to work the shaft.
Without the key, the hub should slide fairly easily onto the shaft with minimal effort. If the key isn't too bad, you can use the flat of the file to clean it up and reuse it.
When you are comfortable with the final fitup of the hub to the motor shaft, you can use some anti-seize compound on the shaft, install the key. When installing the key, use a softer metal on the key, then tap the soft metal.
When you get the wheelmotor back from repair, I suggest that you install, connect it, refill the hydraulic reservoir if any loss has happened, raise the machine up so the other wheel is off the ground and run the engine.
Leave the otherside travel lever out and operate this side lever by moving the lever forward until you see the wheelmotor turning, bring the lever slowly to reverse also observing the wheelmotor. Do this with the engine at idle several times while checking the oil level in the reservoir. This way, if any problems arise such as hydraulic leaks, then you don't have to remove the hub and wheel to take care of the problems. The hydraulic system should self bleed out the air as you do this.
When you are totally satisfied with the repaired side, as the both machine drive wheels will be off the ground, you can operate both drive wheels hydraulically to ensure that both sides are operating satisfactorily. Then install the hub, brake actuator, brake band and connect the brake lever linkage and check that it is operating correctly. When all this is done, install the wheel, put the machine back on the floor and go for a test run. Recheck the oil level in the reservoir.
Mad Mackie in CT:laughing::biggrin::smile: