Train Basics After the air horns were removed, what is that part on the Union Pacific GP9’s roof?

After the air horns were removed, what is that part on the Union Pacific GP9’s roof?

By Cody Grivno | August 8, 2022

Diesel locomotives have many different parts

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Cody answers this question about the Union Pacific GP9 in this video of Ask Trains.

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Ask Trains is a regular video feature of Trains.com for magazine subscribers and Trains.com members, where editors answer the questions readers and viewers are asking.

Special guests can include editors and contributors from Model RailroaderTrainsClassic Toy TrainsGarden Railways and Trains.com.

Questions can be about any railroad or model railroading topic. These can include questions about railroad operating practices, railroad lantern manufacturer details, model locomotive details, and toy train transformers, among others.

Trains.com and Model Railroader Senior Editor Cody Grivno works through many of these questions, which are posted twice a week, each week, all year! See all our answers to questions online!

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