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Re: Hydraulic-transmission oil
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Posted by IanC on February 14, 2006 at 19:55:17 from (68.79.100.131):
In Reply to: Hydraulic-transmission oil posted by Hurst on February 13, 2006 at 17:23:32:
I usually don"t butt in on these long threads but here is my two cents. When I was parts manager for a New Holland dealer we had a 1/2 day session with the head of Viscosity Oil, the OEM supplier to CNH and several others in the ag and construction industries. There are two basic "base stocks" for lubricants, parafinics, and napthinics (don"t ask me to explain the difference. When the engineers of a piece of equipment specify the compounds for seals, gaskets, adhesives, etc. they are spec"d for either of those base stocks chemistries. If you use napthinic oils in a unit designed for it all is well and good, the same with parafinics, where the trouble comes is when using the OTHER base stock which is when you get seal hardening, and delaminating of clutch packs etc.. Napthinic based base stocks are cheaper and those are in the oils made only to a price point. They will meet viscosity etc. but are NOT the same as the OEM specified oil. As I recall he said that to his knowledge NO OEM used napthinic based oil for their branded oil. We used to have at least one job per year where somebody had saved $5-$10 on a pail of oil and spent $thousands to repair the damage to their wet brakes and clutch packs.
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