I have a 1994 B7100 and I changed the fuel filter today. Obviously, I got air in the line so I began the bleeding process. I loosened the two bleeding screws per the manual followed by the one single bleeding valve on the injector pump. I turned the engine over and it squirted fuel all over. I then loosened all three injector lines and began turning the engine over.........no fuel came out. This tractor has not really been running right. It seems to bog down really bad when the slightest load is placed on it (meaning the slightest incline will bog it down, even when it's not pulling anything). Is it possible that the fuel pump is week and barely getting fuel to the engine?? Thanks in advance for any help.