Both the drive shaft and pump where brand new, only 4 months old before the key sheared.
Yes, the key seat depth in the drive shaft is too deep, thus allowing the key to work itself out.
It would cost more to go to a machine shop than to get a new pump...I think I'll try some steel (not stainless) rectangular key stock and see if I can get it to work.
The key that came out was a rounded edge or feathered square key...it was oversized, and these feathered keys are not suppose to come out or need to be held in place with a set screw. Thanks for the replies and please post more advice if you have it.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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