Starting problem JD 4300

[Boondoggle]

I believe if it was a safety switch it wouldn't turn over at all. This is turning over, but it is not firing.

 

[atschirner]

Boon, you are close to the solenoid. It is at the back of the injection pump with three wires coming out of it. When you turn the key to 'on' you should hear an audible click or clunk. Either sound is fine at this point. If not, confirm that you have 12 volts at the red wire feeding the solenoid and a good ground path from the black wire at the solenoid to battery ground.

Please let us know how you make out.

 

[Boondoggle]

I checked the solenoid and it is making a noise when I turn the key. My son said the same thing, so I am not imagining things.
I assume that rules out the solenoid and the relay, is that correct?
It cranks over, so it is not a safety switch, correct?
The fuel is half full. What else? Any suggestions?

 

[RoyJackson]

I checked the solenoid and it is making a noise when I turn the key. My son said the same thing, so I am not imagining things.
I assume that rules out the solenoid and the relay, is that correct?
It cranks over, so it is not a safety switch, correct?
The fuel is half full. What else? Any suggestions?

I'd jumpstart the tractor from a know good battery. Your 4300 might not be cranking fast enough.
If that doesn't do the trick, I'd really suggest replacing the thermistor which has been a known problem. It's a pretty low cost replacement.

 

[defed]

my 4300 does the same thing. starts fine every day for 3 months, then decides it doesn't want to. solenoid appears to be working when this happens. i do random things like remove/replace relays. sometimes it starts immediately after doing something like that, other times i come back 5 mins later w/ some tools and it's working again.

**** annoying.

 

[Egon]

You might also consider going through all the electrical connections cleaning them up and applying some dieelectric ?? grease. That means all the fuses, relays and safety switches as well as the both ends of battery cables. On the battery cables make sure they have not corroded out under the insulation.

Actually it's probably not a bad idea to do this once a year.

 

[Boondoggle]

I picked up the Thermistor over the weekend, and installed it this morning. I used electrical tape instead of a crimp or soder, but after I got it put back together it started right up. It also appears that it has been replaced before.
Thanks for your help.
I plan on going through the electrical connections this winter. Thanks for the great advice.

 

[SandyTX]

Good to hear. Shame that such a simple part can cause so much headache. Glad you got it running!

 

[RoyJackson]

Good to hear. Shame that such a simple part can cause so much headache. Glad you got it running!

Be glad it's a simple and very low cost fix!