UDT Hyd oil or SAE 80w gear oil

[Soundguy]

</font><font color="blue" class="small">( today and not UDT in the front axle of trucks, equipment ets )</font>

Some compnies ONLY spec utf type fluiods in final drives.. NH does not have a gear oil OR utf selection on it's front final drive in my manual.. etc..

</font><font color="blue" class="small">( Yes, Super UDT can be used in crankcase )</font>

I never brought that up..

</font><font color="blue" class="small">( I would select a gear fluid for any gear application, engine oil for crankcases/engines and an hyd fluid for hyd application. I would not try and switch fluids for certain areas since that is not design criteria)</font>

If the device in question was designed with an open sump for diffy/tranny and hyds, then it makes sense that it was designed for a single multipurpose fluid.

Many tractors use the open sump design. UTF, and other fluids.. UDT, etc, were specifically designed to be multi purpose. Not single purpose.

</font><font color="blue" class="small">( could post facts till I am blue in the face and does in matter? no, people are going to do what they "feel" is right )</font>


Given the choice of your 'facts and opinions'.. I think I'll stick to what is in my manual.. since they are the people that have to honor the warranty repairs.. unless you are voulenteering??

Soundguy

 

[gsxr1100]

Again in my Bx I can use either UDT, Super UDT or gear fluid.

Again soundguy they make different fluids for reasons. Again, I will has some gear designers/engineers on Monday about this topic.

Also most times a mutli use fluids is not as good as a one purpose fluid. Something needs to give. As you are an engineering major, you should know that.

Warrenty is only worth the paper it is on. The manuals on tractors are guides at best (as I have stated before). There are to go where you do not know an answer. They are a starting point, that is it. No the bible here.

Plus I have never had an engine oil probem since I started driven. Let alone a incorrect fluid issue. Voulenteering? I could since all you need is the cheapest fluid as stated in the book to be fine & be 100% fine.

I already answered the original posters quesiton. Ask the manufacture if you are uncertain. I would not use advice from others on fluids issues here unless they post something to support this. So first, contact the dealer and go from there.

 

[Soundguy]

</font><font color="blue" class="small">( Also most times a mutli use fluids is not as good as a one purpose fluid )</font>

I agree with that. I call that a compromise application.

</font><font color="blue" class="small">( Something needs to give. As you are an engineering major, you should know that. )</font>

Sure.. but you have to look at design specs. If the fluid in question ( utf, etc ) meets the lubrication specs for the application.. then you are at your 'break even point'. A single purpose fluid.. while it may 'work' better' may change the design. For instance.. you would have to design a multiple sump system to use a seperate hyd fluid, seperate gear oil, and seperate tranny fluid. Or you can use an open sump, and a multi purpose fluid. The differences? For one.. the engineering and design onthe tractor is going to be more expensive due to the enclosed system.. the materials and manufacturing costs will go up, again due tot he closed system. You are introducing more parts into the system to fail.. namely shaft seals seperating compartments.. etc.. etc.
From an economic standpoint.. that's more maintenance cost.. more time.. more fluids for the dealer to stock..e tc.

That multi purpose one size fits all fluid then ends up looking a tad better when the 'big picture' is taken into account.

</font><font color="blue" class="small">( I would not use advice from others on fluids issues here unless they post something to support this. So first, contact the dealer and go from there. )</font>

Personally.. I wouldn't use any info from anyone no matter what they use to support their position. Bottom line.. with warranty issues in mind.. complying with the manufacturer specs should be the only concern...

Soundguy

 

[gsxr1100]

True but from reliability stand point it is major pitfall. I would rather have separate sys since it one goes down the rest can still work per say, not with an open sump. One goes down you are down, big time and could mess u pthe sys more. That is why many machines I work on do not use this concept and will never use it. Same goes for electronics.

</font><font color="blue" class="small">( ( From an economic standpoint.. that's more maintenance cost.. more time.. more fluids for the dealer to stock..etc. )</font>

That is the price of doing business. Both options have benefits to the dealer. Unless you do not want to confuse them more.

</font><font color="blue" class="small">( Personally.. I wouldn't use any info from anyone no matter what they use to support their position. Bottom line.. with warranty issues in mind.. complying with the manufacturer specs should be the only concern...)</font>

As I can see now your outlook on these issues. “complying with the manufacturer specs” is most time API or ASTM spec’s not the manufacture. Exception is Kubota hyd fluid which other people make. Kubota or any other tractor manufacture is not breaking new ground here. I think there is too much faith in manuals here. They are a guide at best, not set in stone.

 

[Soundguy]

</font><font color="blue" class="small">( True but from reliability stand point it is major pitfall. I would rather have separate sys since it one goes down the rest can still work per say, not with an open sump. One goes down you are down, big time and could mess u pthe sys more )</font>

I'm not so sure it's an all or nothing issue.. is it? Looking at the 2 systems, take for instance.. a ford 8n.. tranny, diffy, and hyds are common sump. 5 gallons of fluid... if your hydro pump goes out.. you still have diffy and tranny??? if the tranny goes out... then machine isn't movine no matter what sump you have.. same with diffy.
If we are talking a leak.. I guess ist's a where and how bad issue.

On a seperate sump system.. like a NAA and hundred series.. you have a perched hyd chamber over the seperate diffy and tranny. Again.. if diffy or tranny fail.. you aren't going anywhere either way. If the hyd fails.. you have no hyd. If the hyd leaks, you get hyd fluid in the rear end or tranny, or possible in the crankcase, as the pump is cam driven off the engine, and I guess a shaft seal failure may allow you to pump hydro oil into the crankcase if the pump output was deadheaded...

The biggest concern I see is the introduction of metal into the hyd system on an open sump design. Most of the open sump designs nowadays have a hyd filter ont he suction side. The oldies like the 8n just had a simple screen.. course pump tolerances were wide... but then.. it pumped 90wt oil too!

Id have to say that it is a push pull concept... depends on what you like.

My very robust ex- NH 1920 used a common sump for diffy tranny/hyds.. and that was a 'new' machine.. pow steering and front axle/front final drives were seperate sump.. used same fluid though...

Wet clutches and brakes might be annother issue, but again.. inlet filtering on the hyds would be a must for a commpon sump in my book.

Manuals? I guess they are hit or miss. I'm pretty happy with the manual on my NH 7610s.
The manual on my ex Nh 1920 was only so-so.

Soundguy