Any tricks to removing air bubbles from fuel lines? (2015HST)

[NEFirewood]

A while ago I was using my tractor to move snow when it ran out of diesel. I filled the tank promptly but now I am getting loss of power for example when I tried to use the loader it actually has stalled out a few times.

I went through the owners manual and located and tried the air bleeder screws on the back near the filter and the bleeder on the injection pump on the engine. It did exactly when I expected. When I got to the engine I could see the air bubbles coming out of the fuel line going to the pump.

The only comment I have is I have repeated this a good 5 or 6 times now, each time bleeding out a little bit of air. I'll bleed the air out, run the tractor for a while and then it starts to shut down again, and I bleed it again. Then I keep running.

Is there any way to really bleed out all of the air? I am just worried that there is lots of little air bubbles potentially trapped inside the fuel system that I haven't hit yet.

The fuel in the tank is clean and I use addititive to the fuel so prevent gelling and foaming. Any suggestions are welcome. Thanks!

 

[DaveOmak]

Did you remove the filter and fill it with diesel?
Air may be trapped in there?

 

[jonyyuma]

Next time it is running, loosen and bleed each injector at the top attachment fuel linenut. you will see the air bubble out, then tighten it back down.This is after you are certain the fuel filter is full to the top.

 

[rback33]

Have you checked the fuel filter? Many times when you run things out that is when all the crap in the tank gets lodged in the filter clogging it. I had this happen to me on a 379 Pete... It am wondering if you are not getting fuel through the filter and starving the engine... so.. like others said... I would start there and make sure it's clean AND full of fuel.

 

[J_J]

If you have bled the system and you continue to see bubbles, then I believe you are sucking air into the fuel line.

To check, remove the fuel line at the input to the injection pump and add a test hose into a small container of fuel and see what will happen.