Got a fuel system question

[Diydave]

Kubota L2202, ran it out of fuel today. There is a knurled nut on the injector pump, you can screw it in or out, tractor runs either way. I bled it, started it, finished smearing out the turds in the pasture, tried the screw both ways, does not make the least difference in how it runs.

Is this a hand prime pump, that is frozen in position? It attaches to the fuel hose from the filter and the injector rail return hose.

 

[freewheel3]

That knob is a bleeder. It is used when you have a manual primer pump upstream of it. That engine is used in different applications that require it, your tractor might not have the manual primer pump though.

 

[Tooljunkie]

Some of the older non kubotas had a cap, unscrew, pull it up and pump. They get stuck from lack of use.

 

[Bulldog]

If it's the little round knob on the pump that is what you use to bleed the air out of the line and bring fuel to the injector pump. When you do a service or run out of fuel the knob is unscrewed, then crank the engine over. It creates a vacuum on the fuel line and pulls the fuel to the pump. After it cranks turn the knob to the right to close it. That is the correct (run) position.

My L3000 has this as well as my Bobcat mini x. I love it and wish my M9000 had the same style.

 

[Diydave]

Thanks for the quick replies, I think I'll just screw it in finger tight, and call it good. It was so easy to bleed, that I won't tempt providence by trying to pull upwards on it.

 

[Bulldog]

Thanks for the quick replies, I think I'll just screw it in finger tight, and call it good. It was so easy to bleed, that I won't tempt providence by trying to pull upwards on it.

It's not a pump. It works by cranking the engine over. All you do is open it and it does the bleeding for you, when it cranks close the knob.

 

[Diydave]

Bulldog, I was following your suggestion. I didn't think it was a pump, as it isn't long enough, nor does it have any spring behind the screw, like most pumps, at least in my experience. Hope this clears up the post, somewhat...

 

[Bulldog]

Diydave, I just didn't want you to be fighting with something that's there to help us out. In my experience that little knob has been a subject of great confusion.