Fuel Shut Off Solenoid Bench Test

This is a fuel shut-off solenoid from a 2015 Cat 305.5e2 CR mini excavator. The excavator was running fine and then at intermittent intervals would drop in RPM's and power, spit and sputter, and then return to full power. Eventually the excavator completely cut off while operating and then would not start - specifically it was a crank no-start condition. After thoroughly testing the fuel system for fuel delivery, it was determined that the solenoid may be the cause. After removing the fuel shut-off solenoid from the excavator, bleeding the fuel system at the fuel injection pump, and then cranking the engine over several times, the excavator started. This video shows how I tested the solenoid to prove that it is bad.

[@mrtaktiks]

Let me ask you...I pulled the fuel cutoff on a Kukje 24hp engine, bench tested and it wasn't good. However, I bought a new actuator and connected it to the wiring (not installed). At rest, the actuator is at full length, and when I turn the key on it retracts, but then in a few seconds it returns to full extension. Bad ground--or no ground, even with the actuator plugged into the tractor? Is the unit grounded to its body?? At the moment, I was testing safety switches so I hot-wired the ignition/coil. Runs fine, but without an actuator in place I have to manually turn off the engine. QUESTION: When I turn the key the actuator should remain retracted but it doesn't. Why?

[@rickyshuptrine2831]

I saw on one video that when working right and you turn off switch it has a timed delay before shutting off. So it sounds like yours is working right now. I too am having this solenoid problem, but i haven't pulled mine off to test it. But turning the switch on and off on mine doesnt sound are feel like it is doing anything. Mine has the 2 wire solenoid and only wiring schematic i have found close is for the 1 wire.

[@onehundredpicks5531]

Mine won't come out. It turns but won't come off the engine.

[@adarshs4306]

Video not clear and nothing could see...... .may be you are correct

[@marcosaguilar1495]

Camera too far, I can't see well