Detail Part Useage Assistance

Model Railroader Prototype information for the modeler
1

Got yet another one for the forums: What would one use a Details West #FF-167 Fuel Filter EMD Switcher Type for? Would this part have been used on yard switchers only (e.g. SW7s or SW1s) or would it have been used on switchers that were used for transfer runs (e.g. SW1000)?

As usual, any help the forums can provide would be very much welcomed.

2

From what’s visible of the instructions it says “General arrangement: E.M.D SW-1500, MP-15, etc.”