Mowing Cutting Height Dial Slipping

[John Pollock]

Hello,
I have a new Kubota B2920HSD with a RCK60-29B Mower Deck. The mowing height is controlled by 4 adjustable anti-scalp wheels and a Cutting Height Control Dial which refuses to stay in the selected position. I repeatedly raise the deck and set the dial to "2" and it drops to ".5" as soon as I lower the deck or shortly after I begin mowing. It doesn't always do this when the tractor is cold but will consistently do it after mowing for an hour. The cam which controls the cutting height has been greased but the dealer tells me that this is advisable. Does anyone have any advise or solutions? My next idea is to degrease the cam.

Thank you,
John Pollock

 

[dex3361]

Hello,
I have a new Kubota B2920HSD with a RCK60-29B Mower Deck. The mowing height is controlled by 4 adjustable anti-scalp wheels and a Cutting Height Control Dial which refuses to stay in the selected position. I repeatedly raise the deck and set the dial to "2" and it drops to ".5" as soon as I lower the deck or shortly after I begin mowing. It doesn't always do this when the tractor is cold but will consistently do it after mowing for an hour. The cam which controls the cutting height has been greased but the dealer tells me that this is advisable. Does anyone have any advise or solutions? My next idea is to degrease the cam.

Thank you,
John Pollock

Welcome to TBN.
Are you sure the adjusting knob is not just slipping on the shaft. I run into this on my BX1500, the plastic split and would feel like it was adjusting but was slipping. The fix was using a small worm gear hose clamp that solved the split and slip.

 

[TripleR]

Welcome to TBN.
Are you sure the adjusting knob is not just slipping on the shaft. I run into this on my BX1500, the plastic split and would feel like it was adjusting but was slipping. The fix was using a small worm gear hose clamp that solved the split and slip.

Same thing happened on my BX2200 and I had to replace the knob.

 

[B2320]

After plowing with my new Christmas present I could not wait to try "mower mode" on my 2320. After I made my first two laps mowing I looked at the area I mowed to admire my handy work and spotted the height adjustment knob laying in the yard I did not have the dealer come pick up the tractor, but made a trip to my local Kubota dealer. The dealer told me I was not the only one to have this problem as the factory sends out with a regular non-locking nut. The fix is a nylon coated nut. I don't know if this is a problem on models outside the 2x20 series, but you might want to take a look.