L3800 Died..Help

   / L3800 Died..Help #1  

lzicc

Platinum Member
Joined
Jul 20, 2009
Messages
723
Location
Pittsburgh, Pa
Tractor
Kubota B2650
I was working with my L3800 and it just slowed down and shut off. If I try to start it, it stars but will only stay running for a few seconds. I pulled the fuel filter out and cleaned it, put it back on but it still will not start. The fuel gauge read 1/4 full, but I put another 5 gallons in just to make sure that maybe the gauge was not working. The fuel bowl is only half full of fuel right now which makes me think that it is not getting any fuel. I did check the bleeder valve and it is close. Any suggestions??
 
   / L3800 Died..Help #2  
Try bleeding the air out of the system and see if that helps.
Rule 1 Always try simple and cheep things first.

Hope this helps Ed
 
   / L3800 Died..Help #3  
^^^ Ditto on bleeding some fuel through the line... How many hours on that fuel filter? Do you use a diesel fuel conditioner? I had a little algae & gunk in my filter so I replaced it. Is your fuel fresh?
 
   / L3800 Died..Help #4  
If the fuel bowl is not filling, bleeding is not going to help, You have a stoppage upstream.. Crap in the tank or hoses. Blow compressed air backwards toward the tank, and see if you can get the bowl to fill, but I suspect you are going to be pulling off hoses and trying to clean out the tank..
 
   / L3800 Died..Help
  • Thread Starter
#5  
I went back to the tractor to try and start it. Same thing. I then opened up the bleed valve and cranked the engine over for about 10 seconds. I closed the valve and the tractor started right up then died. I then opened up the bleed valve and the tractor started up. I was able to move it about 20 feet, it started to bog down and then died. Maybe the fuel pump is ok? Maybe the line from the fuel bowl to the tank could be clogged like k0ua mentioned?
 
   / L3800 Died..Help #6  
Loosen the fuel cap and see if that makes any difference.
 
   / L3800 Died..Help #7  
This overall diagram might help some.. as you can see the fuel pump is after the fuel bowl.. If the fuel bowl won't fill. I still say you have a stoppage in the tank or the line from the tank to the fuel filter and bowl.

fuel system block diagram.JPG
 
   / L3800 Died..Help
  • Thread Starter
#8  
That's for that diagram. I am going to try to blow the lines. I will also try starting it with the cap loosened. I let you know what happens. Thank you all. This forum is like instant service. :)
 
   / L3800 Died..Help
  • Thread Starter
#10  
Blowing the line from the fuel bowl to the tank fixed it. When I pulled the line, nothing came out. I put my air to it and after a few seconds, fuel starting pouring out. I hooked the line back up, when to start the tractor, it was rough starting do to the air in the lines, then it was normal. I cranked up the throttle and it sounded strong. It's been idling for about 5 minutes now with no issue's. Thank you k0ua and everyone else.
 

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