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Nortrac correct hydraulic fluids

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greyfox5
Join Date: Dec 2013
Posts: 5 va
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2013-12-08          188425


I purchased a NorTrac NT204C tractor several years ago and have not used it very much. I checked the hydraulic fluid and have noticed that it was low. Here is my question:) Can I mix Mystik AW Hydraulic ISO 46 with what is already in the tractor now. I don't know what was done before I got it. I purchased it new from Northern in 2005. It only has around 60 hours on it now. The placement of the drain plug I think makes it difficult to drain the old fluid. Any info. would be greatly appreciated.



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DennisCTB
Join Date: Nov 1998
Posts: 2707 NorthWest NJ
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2013-12-08          188427


Kubota recommends replacing the hydraulic fluid and filters at 50 hours of use which most people reach in the first year. In your case you are long overdo for full fluid and filter change. Make sure you use the right fluid to avoid trouble. ....


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greg_g
Join Date: Jan 2004
Posts: 1816 Western Kentucky
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2013-12-09          188429


Don't think you found the correct drain for the hydraulic sump. The hydraulic sump is directly beneath the seat, but above the differential housing. The drain is at the rear of the sump, and looks like most of the other hex head bolts back there. What differentiates it is that it doesn't fit into the regular bolt pattern. Sort of a bolt head that doesn't look like it has the same purpose as the rest of them. Being 5 years old, I'd strongly recommend draining/flushing the hydraulic system, and refilling with fresh stuff.

If you use the tractor in warm weather only, AW46 is ok. But it can be a work delay on cold winter days. It takes a while for AW46 to warm up and thin out to the point where the steering and rear lift start working. So if you anticipate using it in the winter, the thinner AW32 would be a better choice.

The suction filter will likely be wet and/or collapsed as well. Photo below. It's inside the sump, top rear. If memory serves, you disconnect the steel line, remove two bolts from the flange, and lift up.

//greg// ....

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greyfox5
Join Date: Dec 2013
Posts: 5 va
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2013-12-09          188430


Thanks for the information on the hydraulic fluid greg_g. I think I now know which bolt I need to undo to drain the fluid. Is there a trick to not getting the fluid all over the place when I drain it? There seems to be a cover over the hydraulic takeoff just below the bolt to drain the fluid. I thought I was somewhat mechanically inclined, but this being my first experience at working on this tractor sure does make me wonder about trying to do anything to it. As I get older I worry about not being able to work on anything I'm not sure of. Have a book but it leaves a lot to be desired as to how to work on it. I think I will use the thinner fluid because I use it more in the winter than in the summer. Again thanks for your help. I hope this reply comes through alright being I'm a new user. ....


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greg_g
Join Date: Jan 2004
Posts: 1816 Western Kentucky
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2013-12-12          188445


I believe you're looking too low. That cover is likely over the aux PTO, which is part of the rear differential housing. The hydraulic sump sits above the diff housing, and provides a platform for the operator seat. Again, look for a single hex head bolt that doesn't seem to fit the rest of the bolt pattern.

And I agree, the Chinglish in the manuals is challenging at best. For most maintenance and repair issues, I typically got more use out of the exploded diagrams in the parts manuals. Like they say, a picture is worth a thousand words (especially if they're Chinglish).

//greg// ....


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