International B-250 Diesel tractor

I am looking into purchasing a 52 Int"l B-250 tractor with a Diesel. The current owner replaced the Injector pump and the 4 injectors but can"t get it to stay running. He is thinking that the injector timing just needs to be set. Does this sound correct? Can someone give me some pointers on this? Or point me to a site to read up on it?

Thank you for any information!

The B250 tractor was not produced till late 1955. I have got S/N 549 wich is the 49th one made and the are a good little tractor. MJ

"stay running"?..will it start and idle for a moment? I don't know what has been done, I do know that they are tricky to get all the air out of the fuel lines after having an injector out.
I would start with fuel supply..pull the sediment bowl off and open the valve..make sure you have a constant and heavy flow..if you don't thats you problem right there. 2)If you have good and constant flow you will have to bleed the system, loosen off the line to each injector and crank the tractor until fuel is coming with no foam or air bubbles, repeat for each injector . 3) Use the hand primer to make sure the fuel is primed to the pump..try starting..if you can start the tractor but it fails to run then you may need to look at the pump.
Your tank may have bacteria in the water in the bottom of the tank and my B250 is notorious at sputtering if the fuel in the tank is getting low and it picks up moisture, I do use alcohol to remove the water and bacteria, but if a tractor has been sitting for a while it could affect the flow of fuel.
The most importabt thing I have told you is that you need a constant heavy flow coming out of that sediment bowl. For those who don't have a B250 there is a sediment bowl as the fuel comes out of the tank, the fuel then enters a line to the pump.

Michael, Thanks for the information. I have a couple of questions and some additional information. The owner reinstalled the injector pump and the new injectors himself and admits he doesn't know much about diesels but does know how to bleed them. The engine starts and more or less stumbles but doesn't idle. He also said that the pressure seems to build at the fuel filter but not at the injectors which is kinda weird? Any idea there?
Is the sediment bowl on this tractor at the fuel filter? How about the hand primer - where is that located? Thank you for your patience.

The sediment bowl is directly above the starting lever. You may have to remove that panel to get at it..I think about 6 screws The hand primer is at the fuel pump , a little rod with a hook like end, turn the lever and start pumping.
Pressure at the fuel filter? THe system is a closed system and the fuel is pumped through the filter so it is reasonable that there is pressure there...I would open the lines at the injectors and turn the engine until I had fuel pouring out, then reconnect and bleed as needed. This is likely something simple to be overcome but keep at it. My B250 is a little devil to get going after a filter change or if I run it out of fuel or a sediment bowl clog..once running it is a great tractor and very economical to use

I spoke with the owner of the tractor today and he said that the fuel only dribbles out of the injectors when he cracks them open. It should be pouring out when he is cranking the engine so there may be some more bleeding to be done or another problem. Question - he should be opening the injectors at the valve cover or the top of the injector pump? Secondly could the injector pump be off of timing? Or do you think that there is just more work to be done with bleeding? Thank you.

Michael, thanks again for the information. I spoke with the owner of the tractor today and he said that the fuel only dribbles out of the injectors when he cracks them open. It should be pouring out when he is cranking the engine so there may be some more bleeding to be done or another problem. Question - he should be opening the injectors at the valve cover or the top of the injector pump? Secondly could the injector pump be off of timing? Or do you think that there is just more work to be done with bleeding? Any pointers? Thank you.