Where to get a top link lock nut?

   / Where to get a top link lock nut? #1  

tallyho8

Elite Member
Joined
Aug 1, 2004
Messages
4,530
Location
North of the Gulf of America, west of Westwego
Tractor
Kubota L4400, Kubota ZD326
Does anyone know where I can get a top link lock nut? My top link keeps unscrewing while I am mowing with my flail mower making it cut the grass too short. I have had 3 top links and what I presume is the lock nut is bent and frozen on all of them where I can not turn it.

In the photo, is this a lock nut?
 

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   / Where to get a top link lock nut? #2  
In the photo, is this a lock nut?
Yup, it's the exact same locknut I have on mine.

I don't use mine, usually requires a tool to adjust it that isn't directly available at the required moment. So I just leave it loose.

I use a small bunji instead.
 
   / Where to get a top link lock nut? #3  
Can you not just replace that thing with a standard nut and then use a wrench to tighten.
 
   / Where to get a top link lock nut? #4  
I would take the normally threaded end to a hardware or tractor store and get a regular nut for it. if you wanted to get fancy you could weld a piece of metal on as a handle.
many toplinks come with just a nut to lock them, however that requires a wrench to let you move it (although a 10" crescent wrench in the toolbox on the tractor has worked well for me)

Aaron Z
 
   / Where to get a top link lock nut? #5  
Can you not just replace that thing with a standard nut and then use a wrench to tighten.

Yup- that is the way my OEM Kubota toplink is....
 
   / Where to get a top link lock nut?
  • Thread Starter
#6  
I will try finding a regular large nut. I was thinking it might be a different thread since it is so large but I guess it is standard thread.
 
   / Where to get a top link lock nut? #7  
you may have to go to a specialty nut/ bolt house for that large of a nut. You could then weld some tabs on the flat parts of the nut & tighten by hand . sort of like a jam nut
 
   / Where to get a top link lock nut? #8  
What most people don't understand is that you can't take the top link apart to replace the lock nut. When kubota puts their top link together, they install a roll pin through the grease fitting hole or they dimple the threads so that the top link cannot be unscrewed too far. The only way that I know to defeat their process (for lack of a better word) is to cut the body of the top link in two and drive out the roll pin, or dress up the dimpled threads and then reweld the body (outer tube) back together. I don't know about other manufacturers top links, and how theirs are put together.

ron
 
   / Where to get a top link lock nut? #9  
All the ones I've messed with you could drive the pin all the way through. Pretty simple stuff.
 
   / Where to get a top link lock nut? #10  
Not the Kubota one I worked on.

ron
 

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