Posted by jdemaris on February 06, 2010 at 07:16:08 from (72.171.0.147):
In Reply to: Re: MF 35 - 1962 posted by NEKS on February 06, 2010 at 06:55:01:
They are all mineral oils (unless synthetic). The 35 series originally called for "pure" SAE mineral oil in the 80-90W range if trans-rated oil, or 30-40W if engine-oil rated. Trans -rated would of been GL-1. Engine would be non-detergent 30W or 40W.
The reason for "pure" mineral oil was the fear that some EP additives corrode brass and copper and also make wet brakes slip. Only thing that qualifies in the 35 tractor is the brass in the hydraulic pump. But, most modern GL-5 gear oils are not rated as not being corrosive anymore. So, as far as I can tell, a modern GL5 80W-90 is well suited for the 35 series tractors, and gives more wear protection.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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