Hi, I have a 2004 Kubota rtv 900 with 2200 hours on it. recently while using it we shut it down and it wouldn't start again. it will crank and turn over but wont start. ive gone through it a bit already and found that the injectors weren't getting fuel so i replaced the old fuel filter and went to bleed the lines at the injector pump but no fuel came out. so i took the fuel pump off cleaned it out and still no luck. could the fuel pump suddenly stop working like this? i cant find any other info on it and even the pump itself seems to be hard to come by. any help is greatly appreciated. thank you.