EMD Displays - Engine 2-Cylinder Cross Sections
Two-cylinder cross-sections of the front or rear of EMD engines were the company’s most frequently produced engine displays. One or more of these exhibits was manufactured for every type of 567, 645, and 710 series EMD engine. Generally the two rear cylinders were favored for this display since the that end of the engine included the timing gear train, and the rear main bearing was on a longer journal, providing enough support so that the cut-off crankshaft end would not require another bearing to support it. Displays showing only the crankcase rear end with no oil pan and no timing gear train were light enough that they could be mounted on casters for movement.
EMD did build some front end two-cylinder engine displays. These generally had the #1 and #2 main bearings and associated crankcase structure, making them longer and heavier than the displays of two rear cylinders. We had a 567D front end display in the Training Center that has full gear train and housings, pumps, and governor. It was mounted to a rotating floor pad, and “powered” by an electric motor hidden in the oil strainer box. The movement was transferred to the camshafts by bicycle chains hidden in the gear train housing.
EMD generally used retired engineering prototype crankcases for these engines that had been machined specially for instrumented testing and were not saleable to customers. For a museum creating a display of this type, a failed or freeze damaged engine would be a suitable starting point.
Electro-Motive showed these engines at open house events, industry trade shows, state fairs, several Worlds’ Fairs, and in their traveling training cars and training center. Some were also displayed at factory branch and warehouse locations.
These displays have no direct relation to the EMD two-cylinder “oil test” engines. Those engines were built in special crankcases and oil pans designed to accommodate balance shafts, they were not cut down from larger commercial engine crankcases.
The picture provided below is a 567U engine two-cylinder cross section at the 1947 EMD 25th Anniversary Open House event. For many more photos of the numerous displays at this event see R&LHS RAILROAD HISTORY #211 (Fall-Winter 2014), article beginning on page 42. This photo is shown on page 53 of that article. Note that the display is mounted on casters.
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