Set purchased mid 1990's possibly 1995 - Black with gray smoke box, red window frame and red doors on cab - plastic side rods gold striping on engine and tender along with 2 passenger cars.  Looking for manual or parts diagram and parts list.  engine ballast front mount broken and ballast not secure, a small brass spring about 3/8 inch long and diameter of ball point pen spring, fell out of engine and I have no idea where it goes.  What type of lubricant should be used on drive train plastic gears?