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duane o.
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Joined: 23 Apr 2012
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 Posted: Thu Dec 20, 2012 7:24 pm Post subject: trans/diff oil |
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We are getting ready to put fresh oil in both s99 and 990 trans and diffs. The books say 10-30 engine oil with high presure additive. What is todays oil choice to use for these tractors as the additive is obsolite or unheard of? Any help is greatly appreciated. Duane
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larry duda
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Joined: 27 Nov 2010
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| Posted: Fri Dec 21, 2012 3:53 am Post subject: Re: trans/diff oil |
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I use 80/90wt. gear oil in my 990. Larry
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TJV
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Joined: 16 Mar 2012
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| Posted: Fri Dec 21, 2012 5:47 pm Post subject: Re: trans/diff oil |
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my guess it sounds like it could be comparable to hydraulic oil like all the newer tractors use in trans/rearends. Most hyd oil is in that viscosity range and is be able to withstand pressure.
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gordey
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Joined: 13 Apr 2008
Posts: 1007
Location: Alberta
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| Posted: Fri Dec 21, 2012 5:50 pm Post subject: Re: trans/diff oil |
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If you use to light of an oil you will have trouble with the pinion seals leaking especially on the 99. 80w90 is fine, but you may want to consider something heavier like 90w140
Last edited by gordey on Fri Dec 21, 2012 5:53 pm; edited 1 time in total |
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