MFWD Axle Oil

[WilliamBos]

I use Permatran, MF calls for it.

 

[ray66v]

I use Permatran, MF calls for it.

They do not always list it in the manual, but MF also recommends gear oil, in axles.

My manual says "Permatran 3 -or- SAE 80 GL-4".

Both are acceptable. If you contact them, they will confirm that.

 

[WilliamBos]

They do not always list it in the manual, but MF also recommends gear oil, in axles. My manual says "Permatran 3 -or- SAE 80 GL-4". Both are acceptable. If you contact them, they will confirm that.

I spoke to the tech at our dealer, he said what you did. Since i have plenty left over from trans services, we use it. We still have some incase we need a top up.

 

[spruce Deere]

My 07' 790 calls for 80-90w gear oil in the mfwd.

One of the ol' mans 1680 IH combines had tractor/hydraulic fliud in the huge final drives, The other 1680 has gear oil.

He changed out the combine with tractor/hydraulic fluid to gear oil after draining off a little to check for debris and found ALOT more metallic matter, oil looked like metallic paint, when drained.

I am at the 500 hour change interval for the 790's mfwd. It will be getting full synthetic gear oil in place of the factory fill stuff. Definitely not good ol' tractor/hydraulic fluid

 

[DeereMann]

I remember reading this thread wondering what the hub-bub was about - until I got to thinking about changing the MFWD oil on my new tractor. I could not find a specific oil type recommendation in the Operator Manual. I called Deere, they told me they "meant" that the MFWD oil should be the same as the transaxle/hydraulic oil (Hy-Guard). The manual was poorly written.

Anyway, this is my first tractor with MFWD, so I don't know what types of gears they have in there. It seems from housing shape they are planetary spur gear sets, for which multi-purpose Hy-Guard oil is fine. If there were spiral bevel or hypoid gears, no way - then API GL-5 80w-90 gear oil is needed with the heavy EP package. I don't think there are wet brakes in the front end, either.

Any of you guys know?

 

[spruce Deere]

There is no wet breaks in your front end DeereMann. I would GUESS there is bevel gears if the front axle does not have visible u-joints. I would second your gear oil selection.

 

[DeereMann]

There is no wet breaks in your front end DeereMann. I would GUESS there is bevel gears if the front axle does not have visible u-joints. I would second your gear oil selection.

Thanks spruce Deere.

I think yours is another vote for GL-5 gear oil, as there are no wet clutches or brakes. Just as long as there aren't any non-ferrous alloy metals in there, either. GL-5 gear oil has an aggressive EP package including sulfur, chlorine, & phosphorous that will eat up non-ferrous metals.

There has to be a bevel gear in there somewhere - the front propellor shaft is perpendicular to the drive axle shaft, then a drop-gear to the planetary gear sets in the wheel hubs. A pretty expensive setup!

 

[Soundguy]

you can get yellow metal safe gl-5 oils. they usually carry the mt 1 rating

Thanks spruce Deere.

I think yours is another vote for GL-5 gear oil, as there are no wet clutches or brakes. Just as long as there aren't any non-ferrous alloy metals in there, either. GL-5 gear oil has an aggressive EP package including sulfur, chlorine, & phosphorous that will eat up non-ferrous metals.

There has to be a bevel gear in there somewhere - the front propellor shaft is perpendicular to the drive axle shaft, then a drop-gear to the planetary gear sets in the wheel hubs. A pretty expensive setup!