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.
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.
Diesel engines run on diesel fuel. Gasoline will destroy a diesel engine.
F350 is a Ford. Why is fuel getting into the crankcase? Dead cylinder and it is running past the rings. If that's not your question, rephrase it and ask again.