Oil & Fuel Kubota B21 Foaming Transmission Fluid.

[TomSeller]

I don't like the looks of that at all!
Don't forget the drain plugs on the brake/axle housings as well.
Pull the red fill and let us have a look inside.
And if possible some video inside when running from the start up.
Will your hoe stabilizers lift the tractor to full height at idle?

I have not looked under it to see separate drains, how many total drain plugs are there? The manual only shows the one.

 

[PHILIP8N]

I would still take a sample and send it in to an oil analysis company like Blackstone in Ft Wayne Indiana. They can tell you % water, % coolant, plus a chemical composition that may give you an idea of what type of oil is in there by looking at it's additive package. Philip.

 

[100 td]

A couple of plugs listed, pdf page 158, item 90, in the parts manual here
http://www.kubotabooks.com/AutoIndex/index.php?dir=Tractor Parts Manuals/&file=B21 parts.pdf
Also one on the bottom of the HST it appears you can't get to unless you drop the hydraulic oil tank.

 

[100 td]

And I think you will be surprised what comes out in the first pint from each housing and the first quart from the tank!
Oil floats on water, so all the sludge and water is down the bottom.
Let's hope the oil is clean, and it's just the wrong oil!

 

[100 td]

Please note, drain plugs on rear axle/brake housings are pdf page 158 of the parts list noted, it must be a different pdf to mine. I have edited the post above.

 

[100 td]

I have not looked under it to see separate drains, how many total drain plugs are there? The manual only shows the one.

Actually if you have a look in the picture you have posted, the lower picture shows the axle housing drain plug!
(I hadn't looked at the pic)

 

[mshumack]

I know that with "automatic transmissions" they will foam a lot if overfilled. Not sure if it's the same with tractor hydraulics - but it won't cost you anything to confirm that the dipstick your using is the correct one for your tractor and to be sure to not overfill.

 

[TomSeller]

Actually if you have a look in the picture you have posted, the lower picture shows the axle housing drain plug!
(I hadn't looked at the pic)

I see that now. The instructions say to remove "the drain plug" (singular), then use symbol 1 twice, once in each picture. Without looking closely, I thought it was another view of the same plug. It obviously is not, there are three. Thank you for pointing that out.

 

[TomSeller]

Also one on the bottom of the HST it appears you can't get to unless you drop the hydraulic oil tank.

I hope not.

 

[100 td]

I wouldn't worry about the plug in the bottom of the HST, but if you find lots of sludge/water in the bottom you may wish to either air ratchet the bottom of the pan off or pull the entire pan, of course that depends how pedantic you are, and whether you intend to do another drain and fill in "X" hours down the track.
Don't forget the bit about running the engine at medium speed for a few minutes after changing the oil, before any use of the tractor. (just found my operators manual Code No. 32721-6311-7, what code no. is yours?)