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Oil for TO-30

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Larry in Missou

09-28-2001 11:10:09




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OK, it's slow so I'll post. I am currently running HD30 in my 1952 TO-30, freshly rebuilt. As the weather gets cooler, I'm considering what to put in it for winter use. The book wants SAE 20 for winter time, 30 for summer. Should I consider 10W30? I'm trying to preserve the old girl, now that she's actively contributing to the cause (keeping up the old homeplace).

Also, when I put in a new PTO shaft a long time ago, I replaced the tranny oil with some rather thin hydraulic/transmission oil. Now I read that SAE 90 is the way to go. But everything works fine - lift lifts, everything operates, no leaks, level stays put. Should I change it out before something goes awry?

Thanks,

Larry

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dennis

09-28-2001 12:47:14




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 Re: Oil for TO-30 in reply to Larry in Missouri, 09-28-2001 11:10:09  
I've used 10-30 for years - year round. THe tranny oil should be thicker. An old guy who sold/serviced Fergies for years said it's ok to use 90W. Others say mineral oil. I've used 90w for years. Tranny oil is a big discussion issue.



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Ray,IN

09-28-2001 20:09:02




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 Re: Re: Oil for TO-30 in reply to dennis, 09-28-2001 12:47:14  
The original seals were not made to withstand the additives/detergents in modern oil. When you rebuilt the engine, the new seals are compatable with mulit-wieght detergent oils so using 10w30 in cold weather for only light duty is reasonable. The trans/hyd/diff oil specified is 80/90W straight mineral oil. A lighter wieght mineral oil works well in cold (<32F) weather. The same reasoning applies to the seals in these three areas, if you've replaced these seals also then modern 40W hy/tran oil will work. This is my view of oils and these fine old machines.

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