Gary Wolf, world renowned expert on railroad derailment investigations will explain how to use various gauges to check certain parameters on rail car wheels. This is the first video in a 2 part mini series on
rail car wheel gauges and how to use them.

An introduction to Mr. Gary Wolf, one of the world's foremost experts on derailment investigations. Listen to some railroad history, then Mr. Wolf will talk about the suspension system on locomotive trucks.

There will be more videos from Mr. Wolf coming on how to use wheel gauges and also videos on the damping systems of various freight car trucks and the differences between the types of trucks.

Link to visit Mr. Wolf's web site where you can pick up your copy of The Complete Field Guide to Derailment Investigation:
https://www.wolfrailway.com/