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Mf12 Hydro Pump Question

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#1 Sawdust OFFLINE  

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Posted April 27, 2014 - 03:32 PM

I have a 1968 MF12 with a Sundstrand Hydrostatic tranny. Model # 902050. Everything works well with the exception of the seal leaking around the output shaft. I have replaced this seal once but it still leaks. The PO had replaced it prior to me getting it but did a bad job of doing it. My plan was to install a quick shaft repair sleeve thinking maybe the shaft was slightly worn. When I started to take the pump apart I found something that doesn't look good. Is this wear normal because of the age & should I not be concerned because it works well. If this will be a problem what would be the result later if I don't address it now. Thanks


This is showing I can only come out of the shaft a 1/4" with the quick sleeve because of the pulley.

pump shaft.jpg


This is the damage. I'm sorry I don't remember what this part is called.

pump damage1.jpg


Here is the mating surface showing no wear or damage.

pump damage2.jpg


I will be posting this same topic in my rebuilding thread.Thanks again