50 Hr Service

   / 50 Hr Service #11  
Why do you think the front axle fluid should be changed from hydraulic oil to gear oil?

Talk to a drag racer...:)


There is a lot of stress on the bevel gears when in 4wd and traction is good while turning. IMO a good gear oil, especially a quality synthetic will provide some cushion...much better than a hydraulic oil.


My manual stated the factory fill HYD or a 80/90 gear oil...on the font axle and finals on the front axle


I used 80/90 shaefers synthetic at the 50 hr service.


My qualifications....old guy, broke **** before..... TIFWIW :)
 
   / 50 Hr Service #12  
I am pretty much sold on changing the hydraulic fluid at 50 hours (well... near 50 hours, at least). I am swayed by the argument in post #2 that there's all sorts of stuff in there that should be removed. It's painful to me to dispose of 10 gallons of hydraulic fluid that is in fairly good condition, and while I've heard others talk of filtering it and returning it to the tractor, I think if I'm going through with the whole procedure I should just replace the fluid.

That said: I wonder if this filtered/new hydraulic fluid might find a home in the front axle, given that hydraulic fluid is an option. It seems like less sophisticated mechanics involved. Or am I asking for trouble?
 
   / 50 Hr Service #13  
I took some pics of the hydro oil out of the trans and front axle at my 50hr service......read through the thread an decide how to proceed…...glad I dumped it all at 50:thumbsup: This is what was left in the bottom of the buckets when I dumped them after setting for a couple weeks.


This was back in 2014...good folks... entertaining...hope it helps

https://www.tractorbynet.com/forums.../304137-50-hour-hydro-oil-non.html?highlight=
 
Last edited:
   / 50 Hr Service #14  
I am pretty much sold on changing the hydraulic fluid at 50 hours (well... near 50 hours, at least). I am swayed by the argument in post #2 that there's all sorts of stuff in there that should be removed. It's painful to me to dispose of 10 gallons of hydraulic fluid that is in fairly good condition, and while I've heard others talk of filtering it and returning it to the tractor, I think if I'm going through with the whole procedure I should just replace the fluid.

That said: I wonder if this filtered/new hydraulic fluid might find a home in the front axle, given that hydraulic fluid is an option. It seems like less sophisticated mechanics involved. Or am I asking for trouble?

Yes…..You are:) already explained it once.....learn yourself.
 
   / 50 Hr Service #15  
Talk to a drag racer...:)
----------------------------------------------------------------------
No need to talk to a drag racer. I don't drag race with my tractor nor know anyone that does. That's not what a tractor is for. :confused3:


xcgreene understands and got it right:

If the hydraulic fluid is good enough for all that happens in the transmission and rear differential, its good enough for the front axle.
 
   / 50 Hr Service #16  
I am pretty much sold on changing the hydraulic fluid at 50 hours (well... near 50 hours, at least). I am swayed by the argument in post #2 that there's all sorts of stuff in there that should be removed. It's painful to me to dispose of 10 gallons of hydraulic fluid that is in fairly good condition, and while I've heard others talk of filtering it and returning it to the tractor, I think if I'm going through with the whole procedure I should just replace the fluid.

That said: I wonder if this filtered/new hydraulic fluid might find a home in the front axle, given that hydraulic fluid is an option. It seems like less sophisticated mechanics involved. Or am I asking for trouble?
I wouldn't, there's a lot of small gears that have to keep working in the front axle. I would use it for bar oil if you use a chainsaw much.
Our next door neighbor growing up work for the highway department and he brought home used hydraulic fluid to run as bar oil.

Aaron Z
 
   / 50 Hr Service #17  
Mine specs 80W Gear Oil for the front axle. Seems to be a fairly common function/part, so I wonder why the differences in specs?
 
   / 50 Hr Service #18  
Talk to a drag racer...:)


There is a lot of stress on the bevel gears when in 4wd and traction is good while turning. IMO a good gear oil, especially a quality synthetic will provide some cushion...much better than a hydraulic oil.


My manual stated the factory fill HYD or a 80/90 gear oil...on the font axle and finals on the front axle


I used 80/90 shaefers synthetic at the 50 hr service.


My qualifications....old guy, broke **** before..... TIFWIW :)

My dealer told me that they spec both as well, but he also suggested getting the factory fill hydro fluid out and gear oil in at my 50 hour, so that is what I did.

At my 50 hour I ignored the manuals limited recommendation and did a full front axle, rear axle/trans, engine and fuel fluids and filters swap. I looked at it like this... I plan to own this machine... for life. Spending a few hundred dollars at 50 hours to make sure that I am off on the right path is worth it if that helps me out later with a longer service life and less repairs as the hours accumulate. I do the same with my pickup trucks I buy, I swap transfer case, differential fluid and trans fluid at the initial oil change. Overkill? Maybe so. But it makes me feel good.
 
   / 50 Hr Service #19  
In reply to the above three previous responses(#8,#9,#10)...my question is "why run hydraulic lube in a gear application?" That's why I run gear lube in the gears of the 4x4 hubs/axle. Hydraulic oil is quite often factory fill, most likely for simplicity sake, but after the gears have had a break-in time why not protect them with a gear lube like most other heavy equipment does. Say you're pushing snow or you're digging buckets of gravel, all the while using 4x4 because you're spinning out otherwise, and lifting the heavy loaded bucket and turning and dumping the load. Hydraulic fluid in there? Not my tractor. Just saying... Dutchy
 

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