Kubota L3940 HST won't go into reverse

[GunChuck01]

I have a Kubota L3940 with hydrostatic transmission.
The tractor has stopped going into reverse when activated by the pedal.
It stopped working when I was driving thru some brush, so I thought a branch may have become wedged in the reversing mechanism. However, no branch and no visible evidence that anything is bent or broken.
The mechanism under the pedal is gold/brass colored and appears to have a pin on one side that may go into a hole on a cam on the other side and there are some springs on the cam.
I have looked for, but not found, a picture or diagram of how these items are supposed to work together.
Anyone have any diagrams or explanation of how this is supposed to work together or any tips how to fix?

 

[North Idaho Wolfman]

Forward and reverse are controlled electrically on that model, so look for a broken wire or pulled connection.

 

[GunChuck01]

Don't see any electrical connections either around speed control pedal or underneath. My tractor is about 10 years old (2007-2009?) - is it possible this was before electrical control ? Found your link to diagram for pedal. Could not find diagram for mechanical control arms under right foot. Thank you guys for your answers and assistance.

 

[North Idaho Wolfman]

Don't see any electrical connections either around speed control pedal or underneath. My tractor is about 10 years old (2007-2009?) - is it possible this was before electrical control ? Found your link to diagram for pedal. Could not find diagram for mechanical control arms under right foot. Thank you guys for your answers and assistance.

There is no mechanical control arms, it's all controlled electrically.
Here are the 4 places (besides dash and other control connections) that you need to check for breaks or bad connections.