R410 - Front & Rear Differential fluid

[EL66]

New to the Board. Helping a friend identify the correct fluid type (engine or gear oil) and weight for a 1994 R410, Called dealers and can't get a straigtht answer. He was told 30w motor oil, 80-90 gear oil and another says 15-40. Any help appreciated. Thanks in advance.

 

[85Hokie]

Dont use engine oil..........
On a typical "tractor" - the 80w-90 is what is used.
Now - it your colder climate - tractors use the hydraulic fluid in the front axle - Kubota S-UDT2

Here is a specific brand oil ............... not sure what the viscosity is however.

https://www.kroon-oil.com/en/produc...1902-bh/18377/427019/1/4/#!/component:427019/

 

[EL66]

Very helpful! Thank you.

 

[ruger1980]

Being that this is a wheel loader and the axles look to be spiral bevel gear sets with differentials a UTF is not required. I would expect that a GL4 or GL5 gear oil would be satisfactory. The reduction drive gear case does house a brake unit so it may or may not require a UTF type fluid it depends on the make up of the brake discs.
The hyd fluid should be fine with just straight ISO46

Service and operation manuals are your friends

 

[North Idaho Wolfman]

Sorry 85Hokie, and ruger1980
This is definitely a case of, don't guess, read the manual!

It's not 80-90 gear Oil, WAY TOO THICK
It's NOT UDT or SUDT not enough of the right lubricants in it.
It is SAE 80w gear oil and SAE 80W is not the same as 80W 90

80W gear oil is really hard to find, and when you do it's real expensive.
80W gear oil is the same as 30W motor oil and they are interchangeable.
Again not 5w30 or 10w30 or any other mix it's not the same.
There is a lot of documentation on this because older Bobcats called for 80w gear oil or 30w in the hydraulic systems, and regular hydraulic fluid makes the drive motors chatter.

 

[ruger1980]

Right, 80W GL4 gear oil. My point was not to use UTF. I had to tell a customer a few months ago his $30k+ differential replacement was not covered because they used a wet brake/UTF oil instead of GL5. I am waiting to hear them cry when the other 2 fail.

 

[GeoHorn]

...
80W gear oil is the same as 30W motor oil and they are interchangeable.
...

Wolfie, I think you meant to say that 80W is the same VISCOSITY as 30W motor oil....??

As for interchangeability.... I believe that is true AS FOR VISCOSITY only. The additive package is NOT the same, as SAE30 engine oil does not include EP additives NOR does it include friction modifiers for wet brakes.

 

[85Hokie]

Wolfie, I think you meant to say that 80W is the same VISCOSITY as 30W motor oil....??

As for interchangeability.... I believe that is true AS FOR VISCOSITY only. The additive package is NOT the same, as SAE30 engine oil does not include EP additives NOR does it include friction modifiers for wet brakes.

I knew what he was saying - I did not look at the manual, just based off the literature at hand that did not describe the type of oil nor it's viscosity - other than it said " universal hydraulic and transmission oil " A Holland based oil company describing the specific oil type that they produce FOR that specific application.

My point about the MOTOR oil was not to use IT due to the difference in the situation described - two entirely different situations.

I did forget however - the viscosity from MOTOR oil and GEAR oil are no where the same thing.........

Much like 10w-30 and 30 weight have the theoretical viscosity when they reach 100c ..... they too are not the same in the modifiers that are added.