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80W-90 as NAA hydraulic fluid?

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David Coe (MD)

08-19-2004 08:38:12

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I've been using 134D as hydraulic fluid since I've owned my Golden Jubilee, but yesterday my Ford-New Holland dealer tried to convince me to put 80W-90 gear oil in there instead.

He showed me the book they always check before selling fluids to customers, and sure enough, in a table titled "OIL CAPACITIES CHART/PRE-1965 FORD TRACTORS" it says, for the NAA/Jubilee, "Rear Axle: 80W-90 or 134D. 9qt.; Transmission: 134D, 5qt.; Hydraulic: 80W-90, 8qt." None of the other tractors on that page and subesquent pages recommend anything other than 134D hydraulic fluid for the hydraulic reservoir.

He made me a copy of that page -- the page has a book or part number(?) 06650075 at the bottom left and the date "November 1994" at the bottom right.

I'm guessing it's a misprint, probably swapped the advice for Hydraulics and Transmission, but maybe I'm confused. Does it make sense to use 80W-90 as hydrualic fluid in an NAA?


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Old Ford Mechanic

08-19-2004 16:32:33

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 Re: 80W-90 as NAA hydraulic fluid? in reply to David Coe (MD), 08-19-2004 08:38:12  
David,Folks use every viscosity and weight oil in these tractors that can be imagined.I worked for Ford dealers for several years and have continued to tinker with these machines in my shop at home for the past 25 years.And "yes" these lifts will work with 80/90 weight oil in them.But they will work a lot better with 134a or equilivent in them.In warm weather your lift may be okay with 80/90,but in cold winter weather it will be slow and sluggish until the oil gets warm in the system.In extremly cold weather this can take some time.And while it is warming up the pump and related componets are taking a beating.do yourself a favor and use the lighter weight oil.Some of these newer dealers and employees simply have not had enough expeirence with these older tractors to give sound advice on some problems.They mean well,but they are reading from a book and that is not always correct.Take it from years of working on these hydraulic systems and use the lighter weight oil.Later.

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08-19-2004 13:59:15

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 Re: 80W-90 as NAA hydraulic fluid? in reply to David Coe (MD), 08-19-2004 08:38:12  
Anything printed after 1987 by New Holland pertaining to Ford equipment needs to be considered before being taken at face value.

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08-19-2004 12:45:28

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 Re: 80W-90 as NAA hydraulic fluid? in reply to David Coe (MD), 08-19-2004 08:38:12  

won't really comment on which oil is the better to use. Just say that if everything works fine then you will be ok on the oil that you choose to use. My question is that considering the age of these tractors,what is to keep different oils in different reservoirs from mixing. I do use 80w90 in all three reservoirs.

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john in la

08-19-2004 09:25:22

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 Re: 80W-90 as NAA hydraulic fluid? in reply to David Coe (MD), 08-19-2004 08:38:12  
Yes I would say that is a miss print.
My NAA Owners manual Dated Sept. 1952 Form # T-400-K 52 says........
Trans 5qts SAE90 above 32 SAE80 below 32
Rear end 7.5qts SAE90 above 32 SAE80 below 32
Hyd 8qts above 32 use A Type hyd oil below 32 use C Type hyd oil

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