Some pos problems include leaking fuel injectors leaks ,fuel pump leaking main injector pump and crack cly sleave
a hole in one of the pistons
the diaphram in the fuel lift pump goes bad and leaks fuel into the engine
There are many reasons why a Massey Ferguson 50 won't drive, including a lack of fuel, or a battery problem.
the 255 i just repaired had a push rod adjuster loosen up causing the valve not to open The valve was not opening so no air movement you can loosen the primary fuel lines at pump to see which cly may have a problem
There are several things that can cause diesel fuel to get into your crankcase. A broken piston ring is the most common cause.
Reseal or replace the valve.
Diesel fuel or coolant entering the crankcase. Either will cause serious engine damage. Stop driving the truck until you can have this repaired.
To prime the fuel pump on a Massey Ferguson tractor, first ensure that the fuel tank has adequate fuel. Locate the fuel pump, typically near the engine, and check for any manual priming mechanism or bleed screw. If present, loosen the bleed screw slightly and turn the ignition key to the "on" position without starting the engine, allowing the pump to push fuel through until you see fuel without air bubbles. Tighten the bleed screw and try starting the engine.
Engine crankcase takes 2.3 US quarts. Oil and filter change, 2.64 US quarts. However, if your tractor oil pan has 2 drain plugs, it is a later model and it will hold a little more oil. Mine is like this and I believe it took 3.2 US quarts with an oil and filter change. Check the dipstick on level ground. Note when you add oil to the fuel injection pump, any overflow will run into the engine crankcase. It uses exactly the same oil, but be careful to not overfill the crankcase as a result. MF recommended SAE 30w or 10w-30 above 40 degrees F, 10w-30 only below 40 F. I use Rotella oil in my 1010. Make sure you use a motor oil rated for diesel use.
Engine crankcase takes 2.3 US quarts. Oil and filter change, 2.64 US quarts. However, if your tractor oil pan has 2 drain plugs, it is a later model and it will hold a little more oil. Mine is like this and I believe it took 3.2 US quarts with an oil and filter change. Check the dipstick on level ground. Note when you add oil to the fuel injection pump, any overflow will run into the engine crankcase. It uses exactly the same oil, but be careful to not overfill the crankcase as a result. MF recommended SAE 30w or 10w-30 above 40 degrees F, 10w-30 only below 40 F. I use Rotella oil in my 1010. Make sure you use a motor oil rated for diesel use.
Your fuel pump is most likely mechanical, check where the fuel pump is bolted to the block and see if the seals have failed, otherwise it can only be massive fuel overconsumption where the excess flows into the crankcase.