JD 9560 walker combine

[8850dave]

I have a JD 9560 combine with the JD 6.8 liter motor and the electrical gremlins have taken over. We were losing fuel pressure and would die then would not start for quite a few minutes. So far changed pressure valve on it then tried a new ECU and no change, then the RH command post went dead again which had happened 3 weeks ago but ha we have 8,000 psi fuel pressure but obviously the injectors are not receiving the signal for fuel and limited help with JD DTACH

 

[Johnny Farmer]

Check your grounds there are several places. Had a similar problem Tech guy couldn't find anything with his computer, I found it by accident after spending many dollars.

 

[rustytractors]

Check your ignition switch. Thats where we finally ended up and fixed the problem! Just my thoughts

 

[620 John]

(quoted from post at 04:51:23 12/03/21) I have a JD 9560 combine with the JD 6.8 liter motor and the electrical gremlins have taken over. We were losing fuel pressure and would die then would not start for quite a few minutes. So far changed pressure valve on it then tried a new ECU and no change, then the RH command post went dead again which had happened 3 weeks ago but ha we have 8,000 psi fuel pressure but obviously the injectors are not receiving the signal for fuel and limited help with JD DTACH

I'm assuming if the corner post is dead you can't read the codes?? Checking for ECU codes would be first and foremost. If you could post them I could look them up and maybe get an idea.

 

[620 John]

(quoted from post at 04:51:23 12/03/21) I have a JD 9560 combine with the JD 6.8 liter motor and the electrical gremlins have taken over. We were losing fuel pressure and would die then would not start for quite a few minutes. So far changed pressure valve on it then tried a new ECU and no change, then the RH command post went dead again which had happened 3 weeks ago but ha we have 8,000 psi fuel pressure but obviously the injectors are not receiving the signal for fuel and limited help with JD DTACH

I'm assuming if the corner post is dead you can't read the codes?? Checking for ECU codes would be first and foremost. If you could post them I could look them up and maybe get an idea.

 

[8850dave]

Not sending any codes after the corner [post was reading again, talked about replacing high pressure pump as they had a similar issue years ago
but JD does not have any in thier inventory so look at a diesel pump shop for a reman

 

[rockcreek4630]

You need to make sure all controllers are communicating it sounds like you have a loose connection or bad wiring. I have never seen a high pressure fuel pump get weak they either work or blow up . If you are low on pressure from pump have you changed the scv in the pump.