Cheapy 38-2, "....I was unaware of air pumps being on the engines like that, of the fact that they even needed pumps...."
The air pumps are used for the Westinghouse air brakes. The time when the prototype was built railroads were using air brakes, or at least starting too (I don't remember the exact dates).
The air pumps are used for the Westinghouse air brakes. The time when the prototype was built railroads were using air brakes, or at least starting too (I don't remember the exact dates).