Bobcat 751f fuel solenoid question

[jchovanes]

Hi everyone

My dad died recently. He owned a bobcat 751 f that I am trying to get started to sell for my stepmom.

The fuel solenoid will not stay open when I turn the key to start. The machine will start when someone holds the solenoid open.

So far I have tried:

1. Replacing the solenoid. Same problem.

2. Then I checked voltages in the wire housing heading into the solenoid. One connection had no volts so I replaced the wiring. Still no good

3. I checked voltages at the ignition. The voltage difference between the ground and start posts was low and varying on the meter.

So I replaced the ignition. I still have the same problem.

When I turn the ignition key to on, the fuel solenoid moves and then goes back to closed.

As I understand it, there are two different circuits involved in the fuel solenoid. One of them opens the solenoid and the other keeps it open.

I can only assume the the problem is in the circuit keeping the solenoid open.

It is also possible that I need to replace the electronic control unit.

I'm writing this out to clear mind to attack the problem and to ask if this makes sense.

If you can think of anything else I could try, please let me know.

Thanks for reading

 

[fortworth-cowboy]

Hi everyone

My dad died recently. He owned a bobcat 751 f that I am trying to get started to sell for my stepmom.

The fuel solenoid will not stay open when I turn the key to start. The machine will start when someone holds the solenoid open.

So far I have tried:

1. Replacing the solenoid. Same problem.

2. Then I checked voltages in the wire housing heading into the solenoid. One connection had no volts so I replaced the wiring. Still no good

3. I checked voltages at the ignition. The voltage difference between the ground and start posts was low and varying on the meter.

So I replaced the ignition. I still have the same problem.

When I turn the ignition key to on, the fuel solenoid moves and then goes back to closed.

As I understand it, there are two different circuits involved in the fuel solenoid. One of them opens the solenoid and the other keeps it open.

I can only assume the the problem is in the circuit keeping the solenoid open.

It is also possible that I need to replace the electronic control unit.

I'm writing this out to clear mind to attack the problem and to ask if this makes sense.

If you can think of anything else I could try, please let me know.

Thanks for reading

Correct, on is an PULL circuit the other one is holding circuit.
Do you have a Serial #?