Belarus 250AS runs then quits Power is low?

   / Belarus 250AS runs then quits Power is low?
  • Thread Starter
#11  
Oh and when it quits you can't get it started again till it sits for about an hour or more.
After it sits for awhile then it will start up again.
 
   / Belarus 250AS runs then quits Power is low? #12  
.........but did you check the fuel cap?
 
   / Belarus 250AS runs then quits Power is low? #13  
DO NOT PUT YOUR THUMB OR ANY PART OF YOUR BODY OVER HIGH PRESSURE DIESEL LINES!!!!!!! It can blow diesel fuel through your skin and that is NOT a good thing! /forums/images/graemlins/frown.gif

I think it might be a good idea to run a compression test on your engine. If you are losing compression all the fuel system work in the world isn't going to help it run. You are going to need to buy or borrow ( good luck on that one) a dedicated diesel engine compression gauge and than find an adaptor that fits your engine. You can get a gasoline engine to run fairly well on marginal compression, it uses spark to start the fire. A diesel engine, on the other hand, uses the heat from compressing the air in the cylinder to light it off. If you have weak compression the air doesn't get hot enough to do the job. You want to make sure you have enough engine to make spending the money on having the pump and injectors tested and maybe rebuilt. I grew up learning to yank the pump and injectors to send them in as a diagnostic routine, it's kind of an expensive way to find out your motor is worn out. Of course, if you just can't find a compression test adaptor for that tractor, there is the ol' WD-40 trick. This isn't a guarantee of motor condition but you can take the air intake off, run the tractor until it quits and then crank it while spraying WD-40 into the intake. If it runs on most all the cylinders you can be somewhat certain that it'll run after you dump a bunch of money into the injection system. /forums/images/graemlins/tongue.gif DISABLE THE GLOW PLUGS OR INTAKE HEATER BEFORE SPRAYING ANYTHING INTO THE ENGINE!!! If your glow plugs, if used, light up while spraying flammable liqiuds into the engine you stand a chance of an explosion or a flashback out the intake.
 
   / Belarus 250AS runs then quits Power is low?
  • Thread Starter
#14  
Yes I checked the fuel cap and that is ok.
 
   / Belarus 250AS runs then quits Power is low? #15  
There should be a screen in the tank just above the fuel cut off line. mine clogged on my old Ford hoe and caused me some trouble, it failed to run after new filters so i figured it was the screen. after about 2 hours running it pulled crud back to the screen i removed it and cleaned the tank and its running fine now.
 
   / Belarus 250AS runs then quits Power is low? #16  
One other thing I just thought about. Another boat story /forums/images/graemlins/grin.gif I had a boat engine that would quit after a short while of running. It turned out to be a piece of plastic in the tank and it would cover the outlet causing it to starve for fuel. On the same boat the suction screen in the tank plugged up and would starve the engine.
 
   / Belarus 250AS runs then quits Power is low?
  • Thread Starter
#17  
Yes a friend I just talke to had his tractor act like htis is and
it was some stuff in the tank. Im going to dump the tank
and clean it out real good. The disconnect the line and
work my way back the fuel lines cleaning them all blowing
them out with air. I will disconnect the line from the pumps
so nothing will go back into them. I will just blow out each
line section at a time. Then will see what that does.
I will get rid of that fuel all together too.
Thanks for all your help guys.
 
   / Belarus 250AS runs then quits Power is low? #18  
Besides WD-40, you can also use spay silicone to start and briefly run the engine. If the engine cranks and runs, the compression is good enough. Remove the fuel filters and rinse them with diesel or kerosene in case they've gotten blocked with water. Drain enough from the fuel tank to check for water and get rid of it. If you have a metal fuel tank, is there any chance condensation could have built up in the tank? Are you running any other diesels from the fuel source?

If water is the problem get a Racor water separator and install it between the tank and the injection pump. The Racor will pull the water out of the fuel.

If the fuel system is open and clean, no water or sludge, up to the injection pump ... looks like the pump. The problem then is to find a shop that can rebuild and setup the pump correctly.
 
   / Belarus 250AS runs then quits Power is low? #19  
I have a 250AS too. The engine runs great! It will run forever on a tank of fuel. The clock only shows 425 hrs or so, but it needs a clutch. Where are you located? You want a parts tractor? I just took delivery on a brand new 4WD New Holland and I don't need the Belarus anymore.

Kevin
 
   / Belarus 250AS runs then quits Power is low? #20  
The problem with the tractor is that the fuel injector pump needs to be drained. There is a 15mm bolt that you need to unscrew and remove and let the fuel drain out of the injector back side of the pump. I;ve had one of these tractors since 1975 and it has this in my owner's manual. If you can't find this bolt, please post a message. I'll give you specific directions.

Good Luck.
 

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