Tractor died, won’t start.

[dlctcg]

@Jeepnford

So if my thinking is correct your DX35 is basically the same as a NH TC35 (or TC35D depending if your is the deluxe model or not).... If that is the case...

The fact your tractor turns over but does not start leads me to think of a couple quick things to check.

First off the seat safety switch and the parking brake switch will not stop the engine from turning over, no matter which position the y are in, they do however shut off the fuel solenoid. This will cause the tractor to die quickly & then create a engine crank with no start scenario.

First thing I would check is to see if the seat safety switch is working & the wires going to it... you can jumper the switch to see if the tractor starts...

Second thing I would check is to see if the Fuel Solenoid is working...
The fuel solenoid is on the right side of the tractor (same side as the ignition switch) it's down by the oil filter. If you set the parking brake and turn on the key, you should be able to hear it click or you can turn the key to the on position, and remove the wire clip from the fuel solenoid, listen for a slight click when disconnected, & when reattaching it. If you don't hear it click either the solenoid is bad or it is not getting 12 volt to power it... I would check to see if you have 12V at the solenoid when the key is on & the parking break is set (there is only one wire on the solenoid, it grounds thru the chassis).

If you don't have 12V power at the solenoid you have a a problem with the seat switch, fuel shut-off relay, or the operator safety module if your tractor has one.

If you do have 12V power at the solenoid... I would test the solenoid. (I've included the test procedure for the NH TC series)

Hope this helps...

 

[Billrog]

Run a choke cable or simular from it to your dash and skip the wiring

 

[Henro]

Did that. Started right up. Swapped solenoids since it has several that are the same. Didn’t help. I’ll still test the solenoid per the manual, but I’m banking on damaged wiring after finding the start of a mouse nest.

If you are able to disable the fuel cut off solenoid, and the tractor starts, you have your answer. Either a voltage problem reaching the solenoid, or the solenoids you used as replacements are also defective.

You are on the path to correct the problem. A voltage check on the wire feeding the fuel cutoff solenoid might prove beneficial.
IF you are getting voltage and the solenoid is not picking up, you likely have an issue with the solenoid, and not the wiring.

Could be something as simple as the contact between the solenoid and the engine block, if the return path to the negative battery terminal is via the connection with the engine block. But I doubt this is the case, since apparently you tried a couple solenoids that you feel are identical...

Does the engine start with the solenoid removed? This might provide some insight, but you would have to put the solenoid back in place to shut the engine down...

 

[Jeepnford]

OK. I’m an idiot. Should always start at the basics. I tested for voltage at the fuel solenoid. None. Went to the relay, had voltage powering it. Traced one of the solenoid wires to the operator safety module. Got out the repair manual wiring diagram. Followed back to seat switch. Plugged seat switch back in. For some reason I had it my head it wouldn’t crank without me in the seat. dlctcg pointed out that it would. Anyway, it was due for a new filter and the relays needed some contact cleaner on the lugs.