Recently acquired an old 60's-70's? 0-6-0 with a very brittle and crumbling gear cover. Basically was warped and when I took the two screws out it broke into 5 or 6 pieces. Marked Santa Fe road number 4. Gear cover marked Bachmann Hong Kong. Haven't a clue what this loco is called. Can I run it without the cover or is there someone with one somewhere? Couldn't find tender in box of goodies either Any help greatly appreciated. Thanks!