John Deere 820 wont run.

banditman · Jul 30, 2015

I have a john deere 820 with a 4 cylinder diesel engine that we rake with. The tractor started to die every few mins so i changed the fuel filters and now it dies every 30 seconds or so. It starts fine and you can rev it up but it dies in a few seconds. Any ideas what is wrong?

beenthere · Jul 30, 2015

banditman
Interesting how you managed to get a 4 cyl diesel when the 820 is a 3 cyl Yanmar. Maybe you meant 3 cyl.

Look for contaminated fuel in the tank. May have algae which can cause supply problems. Will need to follow the fuel lines back to the tank and be sure there is no restriction in the flow.
Also, check that the vent in the fuel cap is not plugged. But that usually shows up as a shutdown after a longer period of run time.
Be assured that there is no air in the system. The manual will tell how to check that out after filter change, I believe.

Tx Jim · Jul 31, 2015

Check to see if fuel return line or return line fitting that attaches to IP is plugged. If fuel is controlled by electric solenoid it could be the problem.

Tx Jim · Jul 31, 2015

beenthere said:
banditman
Interesting how you managed to get a 4 cyl diesel when the 820 is a 3 cyl Yanmar. Maybe you meant 3 cyl.

Interesting as I've never seen a Yanmar engine in a 820. Maybe you meant Saran

Zebrafive · Jul 31, 2015

Tx Jim said:
Interesting as I've never seen a Yanmar engine in a 820. Maybe you meant Saran

I was thinking the same thing, 3 cylinder, but not Yanmar.

beenthere · Jul 31, 2015

You guys are right.. I glanced too quickly at the tractor data . com and saw what I was looking for (3 cyl) and must have mentally made the Yanmar connection, thanks for the catch. But it is 3 and not 4 cyl.

TractorData.com John Deere 820 tractor information

coveredbridge · Jul 31, 2015

Did you bleed the fuel system after changing the fuel filters? Sounds like air trapped in the fuel lines somewhere.

banditman · Jul 31, 2015

sorry meant 3 cylinder. Beld the entire system I have fuel clear through the system but still the same symptoms. I think maybe the alternator is going bad could that cause the fuel shutoff to turn the engine off due to low voltage?

beenthere · Jul 31, 2015

Is there low voltage? How low?

Tx Jim · Jul 31, 2015

banditman said:
sorry meant 3 cylinder. Beld the entire system I have fuel clear through the system but still the same symptoms. I think maybe the alternator is going bad could that cause the fuel shutoff to turn the engine off due to low voltage?

Do you have to jump battery to get engine t start after it dies? I still think you have a plugged return fitting or line.