JD 4310 hydro wont move forward

rlpete · Sep 17, 2014

I cant find any problems with 686 or any other wires. I used a digital multimeter to check wires.
I have good voltage from potentiometer {686} to the controller (4.8 volts max)
No voltage out of controller (696).
Thanks again for your help (I'm lost)

mfreund · Sep 17, 2014

It seems the controller may be bad, but I would pay JD to diagnose. Controller is north of $450. I would go back and recheck everything from the beginning with fresh eyes.

rlpete · Oct 6, 2014

Well I installed a new controller from meridian implement (new old stock) It was installed by someone before me.
Now I have code long long long long and short long long long when I turn the key on.
I reinstalled the old controller and when I turned on key I get one flash. Reverse works, but when forward pedal is pushed I get short long long long code.
Help
do you think the new controller is bad.

rlpete · Oct 10, 2014

Im back with original controller.,
I have no movement at all.
When key is on I have code long long long long, seat

short short long short fly wheel speed sensor
short long long long valve output

seat code comes on first and only one time. the sensor code and valve code repeat.

everything checks good according to the manual

chickenman · Oct 10, 2014

rlpete said:
Well I installed a new controller from meridian implement (new old stock) It was installed by someone before me.
Now I have code long long long long and short long long long when I turn the key on.
I reinstalled the old controller and when I turned on key I get one flash. Reverse works, but when forward pedal is pushed I get short long long long code.
Help
do you think the new controller is bad.

make sure both peddles are tot turn key on wait at least 5 seconds then press forward peddle full down, hold for at least 5 seconds and release turn key off

repeat with backup peddle

this calibrates the peddle movement with the ecm

chickenman · Oct 10, 2014

the last thing you want to do is an auto calibration unless you know all components are in working order

Kyle_in_Tex · Oct 10, 2014

I had a similar problem happen to me 2 weeks ago. After nearly breaking all the plastic what ever their called keepers off, I got the protective cover off of the electronics underneath the pedals of they ehydro. I looked for wire problems or linkage problems and then I realized what was happening. One of the pedals was not returning to the fully up position because of lack of lubrication on the shaft it hinges on. I got out the remington teflon spray and hit it a bit and worked the pedal until it would come up to home easily. It was sticking slightly depressed and giving the computer a signal that I was backing up (while it was not actually backing up) just that it was ever so slightly not quite home. So the computer would not let me move forward. Very simple and cheap fix. Hardest part was removing the protector housing's keepers.

chickenman · Oct 10, 2014

i made a breakout for peddle calibration by buying connectors from jd that fit the connectors hooking up the peddle pots to the wire harness and baring 2 wires to hook up my multimeter too

rlpete · Oct 11, 2014

I wish I had read all the forum before I removed the fuse. That was not a good move.

I have tried many things and still cant get rid of the seat code (8), fly wheel speed sensor(4), and valve output(10)
The seat code comes on first and only one time. The other codes repeat over and over.
I pushed both pedals and got another code, but when I cycled key it was gone.

Kyle_in_Tex · Oct 11, 2014

The flywheel sensors seem to last about 10 years. There are actually 2 of these sensors on the tractor, I replaced 1 but not the other. I still get a code for the 1 old one, but it still works fine. Has your seat sensor been bypassed?