3x20 3520 eHydro Problem No Reverse No Error Codes Forward works Fine Please Help!

[darrellgordy]

Cobra, I hope you are still there. I have a 2011 3520 w Ehydro . It has a little over 800 hrs. without warning when I got on it to mow some grass it would only go backward. The forward pedal would throw error code 14. When I switch the plugs under the peddles the forward pedal works reverse direction fine. You mention you put 12 volts directly to coil to move the tractor. Which pins was that? Was it just 12 volt dc from battery. Note: I already tried the Diagnostic 13 recalibrate and managed to get it out of calibration. Now when I enter the code LLLRLR to get back in, but it simply tells me "Cal off". I can toggle it to "Cal on" with the blinker, but cant get into actual pedal recalibrate. Tractor now cranks but will not move either way due to lack of cal now. I really want to know if the coil will move it before I drop off at John Deere. Im afraid they will jus split the tractor and change the proportional valve first... Please help if you can?

 

[darrellgordy]

I meant to say Cobra Tom

 

[Albr37]

- 2007 JD 3520 eHydro 649 hours. NO FORWARD or REVERSE... 3 point hitch, power steering, and loader all work fine.

- Dealership just completed 4.5 hours of labor attempting to determine problem. Came to conclusion that they were not sure.

- John Deere corporate recommended local tech split tractor to try a couple more things ($$$) or just replace eHydro transmission for over $8,000.

- Looked like some prior discussion of solenoids and valves that require tractor split to check/service.

- Any helpful information would be much appreciated!