It probably hasn't been touched since its initial overhaul in the 1994 era. Other than putting some oil on the bissel post collar, the rest of the pony truck is pretty much "out of sight, out of mind". I know I never stuck the long oiler in there, and I doubt anyone else did.
Be careful about bogus locomotive numbers on parts to 463. There was a lot of silliness involving stamping other engine numbers on parts. I tried to stop it, but had no effect. I guess with only one Mudhen on the property, mixing up parts was not likely to happen.