JD 4700 Starting Problems

[RedLeaf]

It was suggested I post this on the JD Owning/Operating forum as well.

I am having starting problems with my JD 4700 Compact. Here are the symptoms:

1) Engine turns over fine
2) Plenty of fuel
3) All filters/strainers are clean
4) Never fires

I have had the dealer come over and pick up the tractor and when they got it to the shop, they claimed they a diode was gone (which they replaced), and it worked fine. They dropped it off, it started, we ran it for 4-5 hours doing field work, shut it down, and the next morning it didn't start.

The dealer picked it up again, and this time claims that there was a corroded connection, replaced it, and was able to start it, letting it run for 2 hours, and returned it to me. I ran it for a couple of hours harrowing our rings, and a few hours later, it didn't start again.

The dealer can't figure it out and has charged me for 8 hours labour! Moreover, they broke my fuel gauge and claimed it was broken before (I'll talk about that in my next post).

Anyhow, I think there is an electrical problem that is somehow uncovered once the tractor is put to work for a few hours (or perhaps on bumpy fields). I've given up on this dealer and will use another one in the area.

Do you have any suggestions to help diagnose this problem?

Thanks

 

[JerryT]

This is most likely a intermiitent fuel shut off solenoid problem. If you search around you you will find several other problems like this. In my case it was the valve itself, in others it was a thermistor that prevented to solenoid from opening. The thermistor is located behine the fuse box.

 

[mkrapf]

redleaf.
I have had the same problem on my 4300. my fix was a bad ground on the engine block. If you remove the right side planel. if it is like my 4300 there is a ground lug that connects all of the grounds to the block. if everything is nice an quite
you should be able to hear the fuel pump click as the key is turned to the run position. I had to remove all the ground connections and clean.

hope it helps

 

[RedLeaf]

Turns out it was the thermister -- a simple fix. The dealer was suprised that "my" suggestion worked. This also fixed a problem for another customer the same day!

Thanks!