Go BottomNew JD4300 HST Engine Quits Under Light Load
 | Tracey McCormick
Join Date: Posts: 1 
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1999-08-01 6501
I have a new JD4300 HST with only 6 hours. From time to time (averages once every 15 minutes) the engine stalls and dies. Usually it will start straight away, but not always. The tractor is not usually under a load when this happens. It commonly happens at about 2000 to 2300 RPM in the "B" range on level ground with a light load. Letting up on the HST pedal will not keep the engine from dying. I have seen the posts on the other 4000 series with power loss, but this is slightly different as the engine does not just lose power, it dies completely. Has this happened to anyone else, or can anyone suggest a fix ?
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| Jason MacKenzie
Join Date: Posts: 1
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1999-08-01 6504
I don't know if this is the condition to your symptom. But, just maybe your fuel cap isn't ventilated properly. That might not be the case with your machine.. but I do know many other pieces of equipment I have had to loosen the fuel cap on to keep it running.. Its worth a try? Also maybe you might want to add some diesel fuel supplement to your diesel just incase they had water in the tank while they added fuel? But it does sound like a fuel problem to me? Filter? Cap? Water? give it a shot? ....
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Add PhotoNew JD4300 HST Engine Quits Under Light Load
| Lou Panuski
Join Date: Posts: 1
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1999-08-02 6516
When my 4300 HST was new, under 10 hours, I had a similar problem. In the middle of cutting grass, box scraping, what ever, the engine would stall as if someone turned the ignition off. After several minutes of cooling, the engine would start again. I took mine to the dealer where attempts to adjust microswitches, changing fuel solenoids, etc., were unsuccessful. Later, a JD factory tech told my service technician to check a thermal fuse located behind the fuse panel. Apparently this safety device was overtemping and killing the ignition. The dealer replaced the fuse link. Since the repair, I have been trouble free at 150 hours. Good luck with yours, I hope this helps. Let us know your outcome.Lou ....
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