Rumor has it that what they printed in the manual, beside the number 11, that went with the tractor was what Allis Chalmers actually did recommend. Just a Rumor now and I would not want you to start believing rumors.
Re: Rumor Has It in reply to Bob Huntress, 02-21-2008 12:52:40
In the 50's and before, 20w non detergent oil was used in hydraulic molding machines as well as tractors. In the late 50's and early 60's oil companies were selling 20w non detergent oils with anti wear additives. I assume the reason was that the oil companies had not addressed the wear and sludge problems caused from heating standard engine oils in hydraulic systems.
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