JD 3520 won't move, error 57

[ADougSmith]

I have been getting err 06 for awhile but I didn't need cruise so I did not trace it. Did find MFWD connectors properly connected. Then tractor stopped moving and got error 57. Checked for loose connections, bypassed seat sensor, and checked fuses. If I turned it off and waited, a couple times it would engage and move. Once it started moving forward with no pedal being used. Scary. Since then, waiting and retrying does not work. I have called for service appointment and have been waiting over a week. Any ideas? thanks!

 

[swines]

"Error 57 HST Timeout. No response from HST controller."

1. Check all of the fuses.
2. Check the connectors are seated and no wiring is damaged between the pedals and the controller.

If all of that checks out - take it to the dealer as the controller could have a problem.