Pilot
Veteran Member
- Joined
- Nov 20, 2004
- Messages
- 1,208
- Location
- Oregon
- Tractor
- JD 770, Yanmar 180D, JD 420 (not running), had a Kubota B6200
Can\'t seem to bleed fuel system
Tractor is a YM 180. I let the fuel level get too low & when I got on rouogh, sloping ground, she quit & at that angle, the gage read empty.
Not a standard fuel system setup--see the photo.
First, I filled the tank.
I have replaced the large white filter near the top of the firwall and the small filter just in front of the add-on pump, shown down low. I have bled the system at the filter on top and at the injectors. At the injection pump, there are two nuts, one nested on top of the other. The manual just has an arrow pointing to these nuts and says essentially bleed here, but doesn't say which one to loosen. A mechanic warned me not to bleed the pump unless I really knew what I was doing, which I do not.
I can get it to fire up & run for a short while at 2000 rpm, but it runs very rough below 1500.
So, on to the questions:
1. If I loosen the fuel lines at the injectors, do I need to crank it for very long to bleed the system? The book says bleed until fuel comes out--it comes out right away.
2. If I bleed it properly, should it run OK immediately or will it take awhile to get back to normal, i.e., is there maybe a little air still in the system & does it take awhile to clear it out?
3. If I disconnect the fuel line on the injection pump side of this extra pump & crank the engine to test the add-on pump, will I just suck more air into the injection pump? How else to test the pump?
Thanks for your help. Right now, she's stranded in the field & this is my second day of fussing with it.
Tractor is a YM 180. I let the fuel level get too low & when I got on rouogh, sloping ground, she quit & at that angle, the gage read empty.
Not a standard fuel system setup--see the photo.
First, I filled the tank.
I have replaced the large white filter near the top of the firwall and the small filter just in front of the add-on pump, shown down low. I have bled the system at the filter on top and at the injectors. At the injection pump, there are two nuts, one nested on top of the other. The manual just has an arrow pointing to these nuts and says essentially bleed here, but doesn't say which one to loosen. A mechanic warned me not to bleed the pump unless I really knew what I was doing, which I do not.
I can get it to fire up & run for a short while at 2000 rpm, but it runs very rough below 1500.
So, on to the questions:
1. If I loosen the fuel lines at the injectors, do I need to crank it for very long to bleed the system? The book says bleed until fuel comes out--it comes out right away.
2. If I bleed it properly, should it run OK immediately or will it take awhile to get back to normal, i.e., is there maybe a little air still in the system & does it take awhile to clear it out?
3. If I disconnect the fuel line on the injection pump side of this extra pump & crank the engine to test the add-on pump, will I just suck more air into the injection pump? How else to test the pump?
Thanks for your help. Right now, she's stranded in the field & this is my second day of fussing with it.