I have an early 4020 that my dad had installed a combine motor in it. I rebuilt the original motor but the injection
pump is not pumping out any fuel. The pump did spend 17 years sitting in a tote but it looks good and spun freely.
I put in a new John Deere lift pump and I am getting good flow to the injection pump, I can hear fuel returning back
to the tank.
I pulled the inlet fitting out of the pump and the screen is clean. I pulled the rear cover off and can see what I believe to be
the metering valve and springs and the metering valve turns very freely.
Any ideas?
pump is not pumping out any fuel. The pump did spend 17 years sitting in a tote but it looks good and spun freely.
I put in a new John Deere lift pump and I am getting good flow to the injection pump, I can hear fuel returning back
to the tank.
I pulled the inlet fitting out of the pump and the screen is clean. I pulled the rear cover off and can see what I believe to be
the metering valve and springs and the metering valve turns very freely.
Any ideas?