Thank you Larry, that is helpful. Is there a book and or service manul that walks you through the service or gives recommendations on the proper cleaning and lubrication. Also I have a bad coupler on the front of my Erie 9307 cop and hobo gondola, keeps coming loose while going around the track it opens up possibly from the vibration of the car ,any ideas as whether the couple is just a standard coupler or unique to this car. And 3rd, where can I buy the coupler or the whole truck assembly??