I was asked earlier today whether a motor from a 736 Berkshire can be used in a 2020 turbine. The same question applies to the 671, 726 and 681.
The motor that I have is part 681-100 from a 736. It was upgraded from the 671-M1 in 1950 along with the change to Magnetraction. The two motors appear to have the same casting and mounting and so does the frame. The worm wheel and worm cover retained the same part numbers. They have the same front and rear bearings, but the new edition has thrust washers with ball bearings.
I can see no reason the the two motors would not be interchangeable among the 726, 736, 671, 2020 and 681. But of course this would not apply to the 1946 engines.
I could test the 736 motor in my 726, but would rather not have to do that work. Does anyone have a definite answer to this question ?
Malcolm Laughlin,
