Tractor Repair: Oil pump repair on Farm Pro 2420

Question
The oil pump on my Farm Pro 2420 has failed.  I understand that they have a tendency to lose the screws that drive the oil pump.
How does one get to the oil pump and replace the screws or replace the pump?  Where do the screw go?  They are not in the oil sump.

Answer
Stan, this is an extremely difficult question....this is a Chinese-made tractor, and from what I have researched, there's not much available on them...I will assume that the oil pump is the shaft-driven unit on the right side of the engine, OR, the unit is suspended above the sump. Depending on the year of the tractor.....by the way, parts are VERY difficult to come by. However, you can get a reasonable manual here: http://www.amazon.com/Tractors-Diesel-Engine-Operators-Manual/dp/B007HO87DE Other than this link, I seriously don't have a definitive answer for you.