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One of the main problems I've heard of with the dual motored ones is the main bearings are plain brass or bronze, and are not the oil impregnated ones as found on other engines. They dry out and cause the motors to smoke and burn out. A friend with a large layout has sidelined his two units because of this. I only operated my 44 tonner on my module at train shows, which was not very often. One day at home when I was trying something with the engine, smoke started to come out of it. I took it apart and oiled the bearings and it has worked fine ever since. I imagine heavier use would require frequent oilings. Bob Boudreau Canada
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