Revolution Repair
Member
I am having an issue with a Granutech Big Mac car crusher with a JD 6068 engine. The crusher will operate normal for around 20min then when the "crush flat" or "crush jog" button is pressed the engine rpm shoots up to target rpm and then falls down to 1600-1700rpm. Then once the crush cycle is complete it will drop to target idle. Press either crush cycle buttons and the conditions repeat. This engine is fitted with a Stanadyne DE10 injection pump. It is my understanding that it has 2 engine speeds High Idle and Idle. So where would this mid-range rpm be coming from?
This piece of machinery basically has 2 separate systems, the crusher side and the engine side. The only communication between the two is engine speed. The crusher calls for High Idle and the engine ECM complies. Or in this case it doesn't lol. I was not familiar with the DE10 pumps, but after some reading I see the ECM controls the Fuel Control Solenoid. What I don't understand is what voltages should I see at the sol? Is it consistent for the given rpm? Like off 0v, crank/idle is 6v and full throttle is 13v?
I guess this machine was availible with a Cummins or JD engine. I wish it had the Cummins, I have software for that. That said, the JD engine runs very well.
Thanks guys for any help or suggestions you provide.
This piece of machinery basically has 2 separate systems, the crusher side and the engine side. The only communication between the two is engine speed. The crusher calls for High Idle and the engine ECM complies. Or in this case it doesn't lol. I was not familiar with the DE10 pumps, but after some reading I see the ECM controls the Fuel Control Solenoid. What I don't understand is what voltages should I see at the sol? Is it consistent for the given rpm? Like off 0v, crank/idle is 6v and full throttle is 13v?
I guess this machine was availible with a Cummins or JD engine. I wish it had the Cummins, I have software for that. That said, the JD engine runs very well.
Thanks guys for any help or suggestions you provide.