Problems with height adjustment on B 2920 60" belly mower

I have a simalar problem only thing is my 60" deck goes down to about 3" but no lower. I think I am in need of the part replacement you have had done. But I am interested in what you find out. Sorry I do not have a soultion for you.

Hello I just put my deck on again for this year. My height adjustment won't go under 3" also. Did you by any chance find a solution???

I found a similar problem on my B2920 mower deck adjustment. Each time I lowered the deck, the knob would turn on its own, going lower and lower each time.

I discovered that this problem was due to the shape of the "ear" on the adjustment stop lever. As the deck is lowered, the ear on the lever comes into contact with the spiral adjustment barrel. The ear on the lever tends to force the barrel to turn when it's not supposed to. This is due to a very dull and rounded off ear on the lever.

I solved this problem by first welding a short section of a triangular file onto the lever, much like the peak on a roof-line. I then used a matching triangular file to file out the corresponding notches in the adjustment barrel. Problem solved. The sharp peak on the lever now positively engages the barrel and stays where it is supposed to. No more problems.

Since a file is made of some very hard metal, I don't expect it to ever wear out.

Welding a file to the lever ear will change the mower deck height, unless you first grind off a small portion of the lever ear, which I did. Removing some metal is necessary anyway, as you'll want to have a flat spot to weld the file to. If my mower deck adjustment knob is set at a 2.5" cut, I may now be cutting at 2.75", but this isn't terribly important to me. With a little more time and patience, this simple modification could be precisely calibrated to the numbers on the setting knob.

It is critical that the file be welded to the lever ear in the correct spot, so as to end up hitting dead center in barrel grooves. This is important so as not to cause any misalignment with the setting knob detents.

With this small modification in place, I no longer have any problem with the mower deck adjustment..........but time will tell if this was a permanent cure.

Kubota needs to redesign this portion of the mower deck adjustment system, but with a couple of hours of tinkering the problem can be quickly fixed by most anyone.

If anyone here has any questions concerning this modification process, please contact me. I'll be happy to provide pictures, detailed explanations, etc.

Joel

Dear Joel I'm having same problems with my height adjustment dial on my kubota b2920 tractor even though they replaced the dial and the adjustment arm the deck keeps slipping you mentioned away to fix this problem could you send me some pictures thanks sam