In this video the locomotive, Bongo, has had a problem with a seized tender axlebox. Chris dismantles the wheelset and has to re-machine the wheels to remove the flat spots.
He also makes a “wheel drop”.
Christopher Vine’s series of 20 books tell the story of Peter and Grandpa building and operating a railway across their farm.
The Peter's Railway bookshop is here: https://petersrailway.com/shop/ “Combining real engineering with adventures and true stories, these books feed inquisitive young minds!”
Bongo (or Fiery Fox in the books) is the miniature steam locomotive, made by Chris Vine, Author of the Peter's Railway series of books.