[bobo54501]

Hello New guy here from WI . I found your forum looking for 990 info .I have 3 of them . I bought 1 with a loader on it to help with a construction project back in 2007 . Fell in love with it . Found another the next year for parts but it ran so good I ended up repainting it and the snow plow that came with it .This week I found one on craigs . It was in the backround of a picture with a full size tractor he was selling ..Yup talked him into selling it with a tiller ..L.O.L..i Plan on freshening up the loader and my New old one this spring .
I down loaded 2 manuals on these . My one with the plow was getting just a little slow in forward but seemed the same speed in reverse . I put a new filter on then changed the Hydro fluid .I put 20 weight in her .Now I noticed a difference in the manuals .One says type F ONLY ..Others says 20 weight . The other was the dip sticks . One manual says fill up to the flat spot on the stick . Other says 1/2 way or so up the stick .
My loader was always in the flat spot and worked fine .The Plow one was kinda noisy when filled to the same area after I changed it so I slowly added and kept trying it .About a inch and 1/2 above the flat area it quit complaining and quieted down .So am I ok or over filled ?? I also want to change out the new one with the tiller .Did they change the dip stick , The hydro unit ? Miss Print in manual ?
I saw on here some guys run Hygard . Ive used it in the past on other machines . I actually use it in my Camaro with a Built TH350 tranny .Its stayed together under some rought high horse power use ..Was wondering about semi synthitic 5/20 weight oil for colder Wisconsin plowing ?
Thanks and please excuse my spelling . Its late here ...L.O.L..Larry

 

[bobo54501]

P.S. Ya Ill get some pics taken . Everybody Loves pics including me .

 

[tommypaul]

:MTF_wel2::howdy:i use type f here in washington state:thThumbsU

 

[flejl]

bobo,

It seems like it may depend on when the tractor was made in regards to what type of fluid to use in the rear.

I have a couple of Ford (Gilson) LGT's as well and they use the same hydro pump and rear. I found this thread in the Ford forum, not sure if it will help:

http://www.mytractorforum.com/showthread.php?t=143858

By the way, I know what you mean about 990's, I have 3 of them now as well.

The first I picked up to use with a snow plow

#2 was to be for parts, but was to nice so it ended up with an FEL on it

#3 is for parts, it looks to be to far gone to rebuild, but will help to keep #1 and 2 going, so it is making the sacrifice for a noble cause!

 

[D-Dogg]

Kingwood990 and I went through the bulk of the manuals comparing fluid recommendations.

Type F ATF seemed to be common across all the years, and the only fluid recommended one year (forget which it was). 20 weight was recommended in later models.

I use the TSC universal fluid which is type F compatible with good results.

 

[Kingwood990]

Kingwood990 and I went through the bulk of the manuals comparing fluid recommendations.

Type F ATF seemed to be common across all the years, and the only fluid recommended one year (forget which it was). 20 weight was recommended in later models.

I use the TSC universal fluid which is type F compatible with good results.

Drake is correct, Type F ATF seems to be the most common recommended fluid. I believe it was 1974 it was the only recommended fluid. I have been running Type F for a few years in my 990 and it has done well.

 

[bobo54501]

Thanks Guys . One of the reasons I ask is .. Way back in the 70s when I was a Mechanic we were told type F had a very fine abrasive in it that kept the bands on a ford transmision roughtened up for lack of a better word so they wouldnt slip .If you used it in other trannys it would cause damage .Amazing thing was if you put a B&M shift kit in a GM tranny they told you to use Trick Shift or ( You Guessed it )) Type F .. A hydro isnt much more basically than a hydraulic pump and hydraulic motor isnt it ? Seems most quality fluids of the right weight would keep it alive .

 

[Canawler]

Seems most quality fluids of the right weight would keep it alive .

Bingo!
Type F is in the 20wt. viscosity range as are most universal tractor fluids. As far as the hydro portion of the equation goes, any of those will function as a hydraulic fluid. It gets a bit more tricky when you consider the fluid also has to lubricate the rear axle. Type F really isn't designed for that but its ok for the limited wear a GT would get. This application is exactly what tractor drives fluids are designed for.

By the way, you mentioned cold weather use. Tractor drive fluids are made in two different viscosity ranges. The normal viscosity is available everywhere, even Walmart. The low viscosity varieties for low temp use are a bit harder to find but one is JD Hy-gard D.