Hi, Folks: I have an old RC48-62H mower deck associated with an old B6200 HST tractor - Great product - Never let me down for 36 years. I now have a gear box leak that needs to be addressed. I've removed the center blade and four mounting bolts on the belt side of the deck, and hoped that the unit would then lift out. I assume there must be a keyway or some other mounting feature that helps hold the gear box in place. Do I need to also take the underside plate, bearings, etc. off in order to release the gear box? Please tell me what I need to do to free the unit from the deck. Thanks, Jim