What is this guy doing?

[jacksun65]

I fix things for my neighbor now and then. Last year his brother was running the disc mower on a 5030 Ford and it quit on him. I had serviced it the month before and had to drain the fuel tank bugs and crud no water. I got him to start using a funnel with a strainer. Anyway after replacing the filters and fuel bowl they broke I couldn't get fuel to the injectors. I sent the injection pump out to get repaired. Ended up being the head had sheared off inside the injection pump. Now fast forward to this year He is running The JD 5420 disc mowing and the tractor quits. Have had problems with it not wanting to start with fuel below 1/2 tank and plugged fuel filters that's all. So I pull the fuel filter and it's only half full. Change filters check valve replace seals in filter still won't bleed. So I add an electric fuel pump. Bled it out fuel coming out of return line on top of pump no fuel to injectors. Fuel shut off doesn't click but has power to it when on and during start. I did the same thing last year on the Ford. Is it possible that the head sheared off this injector pump also?

 

[Bob Bancroft]

Using junk for fuel.

 

[wore out]

It is the pump driveshaft that shears/breaks when the head and rotor seize, there is an area machined down to a smaller diameter on the shaft that acts as a sort of mechanical fuse so it breaks there instead of tearing up the timing gears.

When you first wrote about this I didn't realize what type of I.P. you were working with that has an INTERNAL shutoff solenoid.

You SHOULD be able to hear the solenoid click and parts move inside the pump when power is applied even IF there's other damage to the pump.

Try this... remove wire from shutdown solenoid and connect an unpowered 12 Volt test light to a source of battery power and touch the probe to the shutdown solenoid terminal. The light should illuminate proving the solenoid coil is intact.

If that checks out the solenoid could still be mechanically stuck.

The way the system works is that a spring is constantly trying to move an arm that pushes the metering valve linkage to the no fuel position.

When the solenoid works as intended it counteracts the spring and pulls the arm back away from the metering valve linkage allowing it to open.

 

[jacksun65]

They took it to the dealer today mechanic took a quick look and checked the solenoid, said the pump was shot. Manager said they might get to it by august they are so backed up. He brought it home and I ordered a new injector pump from Deere $1580 Said it will be here in 5 to 10 days.

 

[caterpillar guy]

Either using poor fuel or not very clean about refueling. I've only had to replace on pump in my life and that was just this year on an RD pump after 55 years. We've got a couple that are in the 65-75 years and still on the tractor.