MF 231S air in fuel system

   / MF 231S air in fuel system #1  

fireman4074

Bronze Member
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Jul 26, 2011
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96
Tractor
MF 231S
I have MF 231S. I replaced the fuel filter. I used the prime pump on opposite of engine to full filter with diesel. I also breed line and call myself getting air out of line. It cranked but it still have air in line. How can I bleed rest of air in line out? It will go died but it will crank after sitting a few minutes. It’s also start blowing blue smoke which it never done that before. The red arrows are lines that bled. Am I missing something? I have video but not able to upload.
 

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   / MF 231S air in fuel system #2  
I have a 231s as well. I bought a new filter but have not changed it yet for fear of this same issue.
 
Last edited:
   / MF 231S air in fuel system #3  
I have MF 231S. I replaced the fuel filter. I used the prime pump on opposite of engine to full filter with diesel. I also breed line and call myself getting air out of line. It cranked but it still have air in line. How can I bleed rest of air in line out? It will go died but it will crank after sitting a few minutes. It’s also start blowing blue smoke which it never done that before. The red arrows are lines that bled. Am I missing something? I have video but not able to upload.

You have to bleed all three injectors on the head, crack all three lines, crank engine until you get fuel at all three, then tighten them.
 
   / MF 231S air in fuel system
  • Thread Starter
#4  
You have to bleed all three injectors on the head, crack all three lines, crank engine until you get fuel at all three, then tighten them.
Ok once fuel come out do I need to shut engine off.
 
   / MF 231S air in fuel system #5  
Ok once fuel come out do I need to shut engine off.

Yes, should have said to stop cranking, tighten the lines, the try and start it. I've had it pick up on 2 cylinders then 3rd picked up after a bit.
 

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