Tips on keeping top link from backing off

[20 20]

I wonder if a small compression spring in between the locking nut and arm would make a difference????????

OdenKirk; nice job

 

[JoeL4330]

locking nut on each side? Reverse the top link?

 

[Soundguy]

The only times I have that issue is when rototilling. Otherwise I just tighten it up with a 12" knucklebuster and it stays put.

tightening the lock nut on mine has always been fine.. never had one back off that was really locked down good.

soundguy

 

[RedDirt]

Lock nut woks for me but if I ever have problems I'll do an Odenkirk fix. Great solution!

 

[studor]

I second the second nut -- works and will not come loose. Cheap solution as well

 

[brin]

I've never heard of such a thing...in more than 30 yrs. of seat time I truly have never had a problem with the top link on a ford jubilee, JD - 3020 or NH TC-29..I must be blessed. What are you folks doing to cause the locking nut to move ? Mine never do

 

[Soundguy]

I second the second nut -- works and will not come loose. Cheap solution as well

gotta get a bak'ards thread nut though!

soundguy

 

[kthompson]

In my experience this is an issue with only certain threads on certain 3rd arms. I have two Kubotas and the CUT I have to keep the lock nut jammed or it will lengthen with any attachment. On my bigger Kubota don't think it has a jam nut but it never moves. Never had the issue with a Ford or Case tractor either. Think what is happening is there is too much clearance between the male and female threads as the 3rd is loaded and then unloaded the parts move.

 

[BlacknTan]

In my experience this is an issue with only certain threads on certain 3rd arms. I have two Kubotas and the CUT I have to keep the lock nut jammed or it will lengthen with any attachment. On my bigger Kubota don't think it has a jam nut but it never moves. Never had the issue with a Ford or Case tractor either. Think what is happening is there is too much clearance between the male and female threads as the 3rd is loaded and then unloaded the parts move.

I believe that this is part of the problem.

Another part of the problem is that the ends of the center section of the top link are swaged down, and then threaded, This provides for ends that may not be perfectly square to the axis of the internal threads, providing little bearing area for the jamnut.
I's bring the locknut up lightly, and try to see if the nut is sitting flush against the center section all around. File the high spots that touch first until 360 degree bearing is achieved between the jamnut and the face of the center section of the top link

 

[ttstraw]

Im with you Brin....I have never had a issue with mine. Tighten the jam nut and its there, doesnt move at all.