DK40SE Won't Turn Off

[heliodriver]

My tractor is a dk40se. 1550hrs.

Problem I'm having is that it will hot shut off with the key.

To shut it off I have to do it manually at the solenoid.

Any suggestions?

 

[thepumpguysc]

Is your solenoid “energized to run” or “energized to shut off”.??

 

[LS Tractor Owner]

Replace the solenoid?

 

[grsthegreat]

there is a relay that controls the solenoid, all i know its not the one detailed in the diagnostic manual. its the one next to it. i dont recall, but i think there held open with power, so maybe unhooking relay will kill it??? been too lnot to recall. i had to replace my relay years ago.


the relays are under hood, on firewall. there the 2 on the left hand side looking at the firewall. have someone hold their hand to it when you turn key on. they should feel the click.

could also be the key switch .... need to do some testing i fear

 

[Midniteoyl]

Should be 2 (or 3) 5 pin relays under the hood, as grs says, controlling the starter and fuel solenoid. They are all the same and you can swap them around to see if the one that controls the fuel solenoid is faulty. Just 5 pin Bosch type relays. Cheap on Amazon.

 

[heliodriver]

So the solenoid is fine. I tested it on the bench and it works fine.
Issue is that I am only getting 1V to the stop solenoid pull wire. The solenoid hold wire gives 12v no problem.

I swapped the starter and stop solenoid relays and it acts just the same.

Any suggestions? Could the display unit (which I understand controls the ss relay) be bad or should I look somewhere simpler and cheaper?

 

[thepumpguysc]

1 volt..??
R u checking it while cranking it.??

 

[heliodriver]

As I understand it, when the key is put to the run position, a quick 12v signal is sent to the pull wire to retract the solenoid. I don't get 12v when I do this, only 1v or so which is not enough to retract the stop solenoid.

Am I correct in this?

 

[thepumpguysc]

As I understand it, when the key is put to the run position, a quick 12v signal is sent to the pull wire to retract the solenoid. I don't get 12v when I do this, only 1v or so which is not enough to retract the stop solenoid.

Am I correct in this?

 

[thepumpguysc]

Yes, I think u r correct.