Freeze plug size?

/ Freeze plug size? #2  
not sure about your Kubota but I have used the rubber ones on my older tractors, I have some that have been in over 15 yrs and never have had an issue/leak with them and they are easy to install!!!! You may not want to go that route since yours is so new but just thought I would throw it out there for anyone that has a need as an option.

They come in various different sizes and due to them being rubber they expand nicely you don't have to be exact with them.
 
/ Freeze plug size? #3  
I THINK they are 25mm. I tried to get a micrometer in there to check my L4060 but there is too much in the way.
 

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