[AT] 90wt oil

[Ralph Goff]

I'm surprised that #90 oil was recommended for these hydraulic systems. My
MF super 90 also has the scotch yoke hydraulic pump and they recommend type
A automatic transmission fluid, the same as Case of the same era did. Of
course I have been using Case-IH hytran in everything which seems to work
well. The Massey does have a slightly worn out steering pump so I notice the
steering is a lot better when the tractor is cold. I guess heavier oil might
help the situation but ideally it should have the pump repaired or replaced.

Ralph in Sask.
http://lgoff.sasktelwebsite.net/

----- Original Message -----
From: Chris Britton <c.britton at worldnet.att.net>
To: <at at lists.antique-tractor.com>
Sent: Sunday, August 20, 2006 3:34 PM
Subject: [AT] 90wt oil


> If it's not as thick.. I doubt it will perform as good.
>
> The scotch yoke piston pump on the old ford N series was designed for
heavy
> oil.. the thinner the oil, the more the lift can leak...
>
> Soundguy
>
>
> >From: "charlie hill" <chill8 at cox.net>
> >Subject: Re: [AT] tranny fluids
> >Chris,  I don't remember the wt but Fuller Roadranger transmissions as
> >found
> >in big trucks use mineral oil.   I don't think it is as heavy as 90 Wt
but
> >there is still mineral oil out there to be had.  Maybe you haven't looked
> >in
> >the right places?
> >Charlie
>
>
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