Theres not many F2100E owners around so it's not so surprising your question has gone unanswered as long as it has.
I'll take a swag, unless the pedal/linkage relies on an internal return spring, there has to be some sort of return device, be it a spring or springs and/or a shock located somewhere on the linkages.
The BX series uses two return springs and a shock to soften the return. Same for the GR series.
Could it be possible that the return assembly has fallen off?
If all else fails, you can give a Kubota dealer a visit.
Good luck
I'll take a swag, unless the pedal/linkage relies on an internal return spring, there has to be some sort of return device, be it a spring or springs and/or a shock located somewhere on the linkages.
The BX series uses two return springs and a shock to soften the return. Same for the GR series.
Could it be possible that the return assembly has fallen off?
If all else fails, you can give a Kubota dealer a visit.
Good luck