Anyone know the correct seals for an sm420 PTO. Looks like 2 that may need replaced - output shaft seal fo The one on the engagement shaft does have a number but the one on the output shaft does not.
Here's a PDF of the National lip seal catalog. I use it pretty frequently to match up dimensions on seals of various types. The shaft sizes of PTO's start around page 55 or so. If possible, try to find a double lip seal, which has a dust barrier outboard of the lip that actually does the sealing. They last a lot longer in hostile environments like where a PTO lives. Good luck! Jerry
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