DoRon
New member
There are two oil filling ports but only 1 drain in the front axle differential case. The manual says 1.1 quarts. Does this mean in each or total?
Oil & Fuel Gear oil in front axle specs
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ovrszd
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Hmmmm,, I'm not specifically familiar with your tractor model. Is it like this??
If so, it has three drain plugs and fill plugs. The manual should tell you oil capacity in the center section and the outer sections separately. I would guess the 1.1 qts is for each section. The drain plugs and fill plugs for the outer hub assemblies are hex bolts that don't really look like plugs. Look more like something to do with the construction of the assembly.
If so, it has three drain plugs and fill plugs. The manual should tell you oil capacity in the center section and the outer sections separately. I would guess the 1.1 qts is for each section. The drain plugs and fill plugs for the outer hub assemblies are hex bolts that don't really look like plugs. Look more like something to do with the construction of the assembly.
ovrszd
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Cool, glad you got it. 
My manual says I can use either Kubota SUDT (hydraulic fluid) or SAE 80-90w. I don't get that. Those two oils look nothing alike and their viscosity isn't similar in any way!!!!! I store my tractor in a heated shop so wasn't worried about oil flow in low temps. When I changed, I put 80-90w in. Thought it would stay on the gears better and less likely to breach a seal?? Who knows if I'm right??
My manual says I can use either Kubota SUDT (hydraulic fluid) or SAE 80-90w. I don't get that. Those two oils look nothing alike and their viscosity isn't similar in any way!!!!! I store my tractor in a heated shop so wasn't worried about oil flow in low temps. When I changed, I put 80-90w in. Thought it would stay on the gears better and less likely to breach a seal?? Who knows if I'm right??
Cool, glad you got it.
My manual says I can use either Kubota SUDT (hydraulic fluid) or SAE 80-90w. I don't get that. Those two oils look nothing alike and their viscosity isn't similar in any way!!!!!
The reason why everyone is so confused by this is, it's incorrect. Virtually everyone here, seems to be convinced that 80-90w gear oil is much heavier than hydraulic transmission oil. It's not.
The gear oil weight scale is not the same as hydraulic transmission oil, so you can't go by the numbers. And, 80-90w gear oil is not thick at all.
If you do some research, you will find that hydraulic transmission oil, and 80w gear oil, are basically the same viscosity. You can also do a simple visual side by side pour test, and easily see that for yourself.
Both products are gear oil. Both are suitable in that application. Hydraulic transmission oil has some different additives, and is made to do many things. Gear oil is made to do one thing. EP gear oil has a special high pressure additive package that makes it superior to regular gear oil, and hydraulic oil for this application, but it's apparently debatable, (as everything here is), as to whether or not it would matter. It doesn't hurt, or cost much more, so I use a $6 a quart synthetic EP gear oil.
Bluegill2
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My experience is completely opposite man! 80/90 gear oil is closer to the viscosity of honey, where SUDT is closer to that of water. What am I missing here?
Don't take my word for it. Do the research. Here is one of many places where they discuss the differences in weights of gear oil: What Do Gear Oil Viscosity Numbers Mean? | eHow
140w gear oil is heavy like honey. 80w gear oil is not, it's like around a 30w motor oil.
Hydraulic transmission fluid is also close to a 30w motor oil.
Pour both the 80-90w and the hydraulic trans oil at the same time, the same way, and you will see them both flow at about the same rate, at room temp.
The fact that they are interchangeable in this application should be a clue.
Bluegill2
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The honey and water comparison was an exaggeration just for example. I use a lot of 80W-90 and hydraulic oil here on the farm. SUTD2 is the thinnest oil we use here, thinner than any oil I've ever used. 80W-90 is the thickest oil used and the two really aren't close in viscosity, IMO...
Yes, the honey comparison is an exaggeration, and it was in response to someone else who used it first, suggesting that 80-90w was like honey.
Not going to argue this further. Everyone is welcome to believe as they choose. And clearly some people are not willing to accept this, even though information is available saying the same thing I am.
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Toyboy
Platinum Member
If you have an outboard motor, you should be familiar with the lower unit grease. Same thing, not like honey but pretty much like motor oil. Just spill some sometime and you'll see what I mean.