I'm restoring the Hornby 00 layout I built in the 1960s for my children & myself. (Stored safely from 1972 to 2022). However there is a 2-6-4T loco with outside valve gear that will not start or run. How do I remove the body to lubricate all bearings & free off brushes etc? My other 4 locos are running well for their age ! and the nickel silver rails have cleaned up well. Any advice would be appreciated !! Ron