Kubota ZD21 Fluid, Filter and Grease Service 

I have one of these as well. I have ~650 hrs on mine. It’s a beast. It have been a very reliable mower!

For two years I thought there was a fuel system problem and it turned out it was the seat switch 🤠🤠🤠

There is also a grease fitting on the front axle underneath which lubricates the pivot mechanism. Easily overlooked. Good video!

Good video. Just a heads up, the middle spindle does have its own grease point under the gear box, and there's also a grease point on the deck-lifter joint (each side). Also two grease points under the seat for the control arms. I had this mower for several years before I stumbled across those by accident

Thank you for this. I'm a novice at maintenance. This greatly helps.

There is a grease zert for the middle spindle as well it is not lubricated by the deck gearbox.

I purchased my ZD 21 new in first year they made one. I was in the Lawn Care game. I sold out in 2004. I kept Z and a 36 Bunton. I am going completely thru it. I have never changed the hydra fuild. It has never used a drop of hydraluc fuildThe question is Changed just the filters? Much like a automatic transmission in car. The fuild is still clear. Have you ever heard of a problem being started by changing the fluid ?

Really good video ! Thank you!

No, you are way off on the new price. I have one I bought new for $9500.00. I did have a transmission fail in 2014. After repair I have been running it with the transmission overfilled with no problems so far. Mine has a little over 800 hours on it now, and I really like it.

Good video, they are good machines, I love the one I’ve got. You got a really good deal on it however I bought my 2005 new in 2005 for 10K(sorry I hate to burst your bubble, I think you said they cost 25K new, which isn’t the case) I think the new ones now are around 15-18K, those are the bomb, Curtis even makes an air conditioned cab you can buy for it lol

My 1996 Kubota ZD21 had a leaf bagger on it. Is that why there is a hole in the back of the flywheel cover? And it has Femco ROPS.

-- there are lots of stuff that needs to be done on these Zero Turn Lawnmowers - with tractor motors in them - mine is a ZD 25 - which is really a 28 with the fuel turned down - bought it new - made a 5 1/2 hour job take only 1 1/2 hours - and is much much quieter - it makes mowing a LOT more entertaining - I have had mine stuck many times because the rear end sticks out in ditches and such -- fun to unstick - unreal quick and agile -- I have tractors and all grown peoples toys - fixin to get another bigger tractor soon - raised on a hog farm back in the 50s -- tractors are a different lifestyle ! -- hehehehehe -- even if ya don't get enough hours on the oils -- in the winter -- at least change the filters anyway -- a trade secret on longevity - napa/ fram / wix makes better priced filters that are just as good - kubota does not make their own filters - they are outsourced to GMC, a company based in Indonesia -- oils are not either - Kubota engine oil is manufactured by MacAllister Machinery Inc. company - I would not use a very cheap oil or filter though - yu went too fast for most to benefit -

Thanks for the great video! I have a ZD 28 and the other day I smelled smoke and I think I burned up my deck gear box. I was going to try and take it apart but was not sure how to access it. I also do not have my owners manual. Any tips are appreciated! I had the issue of mine over heating and I blew air threw the radiator to clear out debris in the fins and that has helped. It sounds like I really need to swap out the Trans fluid before that goes bad too! My wife hates out lawnmower lol she said I should have gotten a brand new Ferris but oh well! I picked mine up used with about 700 hours I think it was used to mow an air port. Thanks again!

love the ZD 21,, where to find that sweet sun shade?

Did you over fill the transmission case or both the right hand and left hand axles?and how much did you overfill?

Also, how come you didn't use the self jacking mechanism? Was it stuck by chance? Mine was and I'm still trying to free the spinning rod so I can turn the jack and lift the front of the mower...

What about the oil in gearbox on deck?

Hello, do you mind sharing how you bypassed the seat safety switch? Did you just use like a paper clip to connect both ends to test it and then left it that way or did you have to take the wires off of the connector and tie them together? Or something else? Thank you.

I've searched everywhere on line for my zd21. Where is the dipstick thing to check the oil, and how do I get the seat to flip up it if the way. I see the front stick that moves the seat back and forth, and a knob behind the seat that I can't budge in any direction. I added antifreeze when it got hit. When i start it the engine lite stays on and starts beeping loud. Please help.

Really good video! Thank you!