JD 4700 Will Not Start ? ! ?

[Edward. S]

Was working fine the other day, next morning all it does is crank and won't turn over. Has fuel, all filters are clean, battery is good. :confused2: :anyone: I am guessing a $225 Solenoid. Don't hear it clicking when I turn the key. Fuel are in fuel lines but wont make its way into injection pump. TIA

 

[JD6400NZ]

Was working fine the other day, next morning all it does is crank and won't turn over. Has fuel, all filters are clean, battery is good. :confused2: :anyone: I am guessing a $225 Solenoid. Don't hear it clicking when I turn the key. Fuel are in fuel lines but wont make its way into injection pump. TIA

Check fuse box

 

[Edward. S]

Check fuse box

For what

 

[JD6400NZ]

Blown fuses, that can often cripple a machine.

 

[Edward. S]

Blown fuses, that can often cripple a machine.

I never knew tractors had legs. :confused2: Please refrain from posting on this topic please and why would I have to check the fuse box, everything is operational. Other than it cranks and wont turn over.

 

[kennyd]

I don't understand "cranks and won't turn over", to me, that's the same thing. I assume you mean it cranks and won't start/fire off. Anyway, do a search for the term "thermistor" and you wil find a few threads to read, I am on limeted access so I can't link them. Basically, the fuel solenoid may not be pulling in because of this small inexpensive part.

 

[Katahdin]

Ditto, if the starter is spinning and engaging the flywheel, belts are turning, etc than the engine is "turning over."

If you suspect the fuel cut off solenoid than it can also be a problem with the wire and/or ground. If you can take out the solenoid, put some voltage from a battery to it to see if it "clicks." No click, then the solenoid is bad. If it clicks, than suspect the wire or ground. In any event, $225 sounds like a dealer price. Fuel solenoids are a lot cheaper if you buy them on amazon.com, ebay, or some other parts place and install them yourself.

 

[JD755]

Kenny is right. Thermistor is the most likely culprit. Very common problem. Here are just a couple of the thermistor threads.

http://www.tractorbynet.com/forums/john-deere-owning-operating/265327-thermistor.html

http://www.tractorbynet.com/forums/john-deere-owning-operating/136751-jd-4300-wont-crank.html

Addendum:
While reading these old threads I noticed a glaring error I made in 2012. Somehow I must have gotten the different solenoid engage methods JD has used through the years mixed together while I was writing. Maybe I was just asleep. Anyway, my 755 does not use a thermistor. In a very basic arrangement, it just connects the pull-in solenoid to the starter. So no electronic parts, just a hard wire connection on mine.

 

[Edward. S]

Starting to guess its the thermistor. Heard the fuel solenoid click this morning. Thanks for the help.

 

[jenkinsph]

Starting to guess its the thermistor. Heard the fuel solenoid click this morning. Thanks for the help.

We used to spray intermittent electronic components with a freeze spray to test them. Sometimes this will give you a clue if a heat sensitive part is starting to fail. A little R 134A would do the trick.