I need to put some oil in my Hydrostatic-trans, I don't know what the previous owner used. So I am draining it . the oils in the manual are no lnger available, no 20w, "They don't make it any more". I have searched the forum with not one response from the data base, I find that hard to believe. Anyway that is my dilemma. The mechanics at the tractor store tell me there computors don't have data that far back, It wasn't that long ago, was it?
What Type Of Oil For Mtd 1980 Hydrostatic Transmission
Posted June 10, 2013 - 01:28 PM
Posted June 10, 2013 - 02:46 PM
It was indeed that long ago, and yes, you're getting old. LOL
Some of us have found 20wt at Tractor Supply Company, Some will tell you they are using 10w30.
You can also use Type F ATF (listed in the manual for most years of 990).
Finally, you can use that TSC universal hydraulic fluid that says it is type F compatible. Works just dandy for me anyway!
Edited by AverageJoe, June 10, 2013 - 02:47 PM.
- Kentrails said thank you
Posted June 10, 2013 - 04:29 PM
Dexron III will work just fine. Technical data on it specifies Eaton & Sundstrand trans use. And yes, 10W40 will work as well, especially good for hotter climates.
Posted June 11, 2013 - 08:00 AM
Almost all hydraulic oil is 20w, eatons are very forgiving and will work on a wide variety of oils.
Posted June 11, 2013 - 10:25 AM
Almost all ATFs fall into the 20w range as well.
I prefer to run a universal tractor fluid since this is a shared sump system. The oil has to work as hydraulic fluid and it also has to lubricate the transaxle. UTFs are formulated with additive packages specifically made for this job. The normal temperature varieties fall at the top end of the 20w range and the low temp ones are right in the lower half of the range.
- Kentrails said thank you
Posted June 11, 2013 - 10:53 AM
OKAY..I am off to the farm store UTF it is. I would be lost having to depend on the resorses around here, I was told by the tractor guy that there is no such model number as:
140-990A, for an MTD. So, I asked " My little tractor does not exist, simply because your database is incomplete?" He defended his "Data base" as if it was his mother.
My MTD does not exist, a philosophical dillema.
Maybe I should run him over with it?
Now I want to change that stupid muffler.......next topic
Posted June 11, 2013 - 11:01 AM
Don't hate on your tractor guy too badly. For one, there aren't a lot of MTD labeled 990s out there. These were mostly rebadged for the stores who wanted in on the homeowner tractor market. Many of the sellers no longer exist, such as Western Auto. Others got out of the OPE biz altogether, such as J.C. Penney.
Posted June 11, 2013 - 10:18 PM
I have a White GT1650, which is a rebadged MTD 990 with a cast aluminum grill and other minor differences... Good tractors, in fact I used mine this evening to furrow between my potatoes... again.
There's a fellow near hear selling an MTD 990/FarmKing... looks just like the MTD with the keystone grill, etc. only the colors and decals differ.