Hi all  could anyone be so kind to give me some tips and advice on changing the eccentric rod on a lionel PE lioncheif model  6-30218 is this a straight forward job?
 will i require any specialist tools, or is it a job best left to a service agent?
 As i live in the uk i normally model on british diesel outline oo gauge.
 This is my first lionel purchase and also my first steam purchase so a complete novice when it comes to steam and lionel products.