Farmall MD-450D Crankshafts

Hi everyone I have a couple md's I am parting out I am trying to remember if the crankshafts are the same with a smd smtad 400d 450d i believe they are but my wife I think is hiding my parts books on me like to save them out of the parts tractors and put on the shelf for someone if they have good bearings etc...

thanks
 
Without looking I think there was MD cranks for 3 piece center main bearings. Cranks for one piece center mains and this will work up into 400 tractors.
Starting in 400 tractors in 1956 I think, no oil return groves for the rope rear main seal was used in the cranks and a neoprene seal started being used. That continued through 450 tractors.
 

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