L3940 HST issue

[azindianrider]

All,

My tractor has an odd issue. while in HST mode it changes from fast to slow at the wrong times. Example: Just moving from point a to b. I step on the pedal and the tractor moves and is in fast (rabbit) mode as I slow it moves into slow mode. you can hear the engine gear down. While working as I try and pick up a load it will go into fast mode. It has the same issue while using the box scraper.

The last thing that just happened is I have lost throttle control with the pedal. To move the tractor now I have to use the lever control on the steering column.

It been at my dealer for 3 weeks and Kubota says nothing is wrong with it. the dealer tech is at his wits end. Everything leads me to believe it is something in the foot switch but Kubota says its a waist of money.

 

[lddykstra]

I am not sure this is your issue but I can tell you my experience.

I lost Auto Throttle control with the foot pedal also. Turns out the Auto Throttle Cable that attaches to the foot pedal was broken. Its easy to see, just look below the tractor at the linkage that connects to the foot pedal. You should be able to find a cable that goes from the pedal to the throttle on the right side of the tractor.

Based on your description, that may not be your problem but might be worth looking at though.