Intermittent Start

[Stormtruck2]

02 JD 4600. Cranks full speed, won't start. Called for service call, went out it fired right up, cancelled service call before he left. Last night, -8F when I got home, fired right up.:thumbsup: This morning 20F, cranked beautifully, wouldn't fire. :confused2: Ideas, cheap solutions appreciated.

 

[KB9UDE]

I had a 2001 JD 4500 a few years back and had a similar problem. I would change fuel filter and I also had to replace the injector pump. I think you can manually operate the pump and it should start up.

 

[Stormtruck2]

I have replaced the fuel filter and it does have Howes treated diesel fuel in it. It started at -8F, but not at +20F. I'm a thinking it might be a bad fuel shut off solinoid. I hope not. $165 for a new one. I'm not hearing the solinoid activate when I turn the key, so I suspect it might be that, not the fuel pump. Anything besides the solinoid I should take a gander at??

 

[JD755]

Are you familiar with the Thermistor problem common to those tractors? It controls the fuel solenoid. Lots of info here with a search for "Thermistor". Many here including me will be glad to provide more detail, but do the search first.

 

[Stormtruck2]

Are you familiar with the Thermistor problem common to those tractors? It controls the fuel solenoid. Lots of info here with a search for "Thermistor". Many here including me will be glad to provide more detail, but do the search first.

I just ordered a new thermistor today. Will have it tomorrow. I'm fairly certain that it is the thermistor. Once I have that fixed it should be a great piece of equipment. I love it when it runs Putting chains on her too so she should move snow very very well. Thanks for the heads up on the thermistor.

 

[JD755]

Agree it does sound like the thermistor but looks like you are on top of it. Let us know how it comes out.

 

[Stormtruck2]

I will. I was looking for a 955 last year when this 4600 was traded in while I was talking to the dealer. I think I got a better tractor than the 955. Cab, FEL, and 72" mower. I really love it. Once this thermistor glitch is fixed I believe she will be really dependable.