Hi all. I have a ford 550 backhoe, have noticed a fairly significant decrease in power when under load especially using front bucket or 3-4th gear up slight grades in transport. My uncle who is a retired heavy equiptment mechanic suggests that it is a the fuel injector pump, brand CAV. A friend also has a 550, had the pump go bad and it cost roughly 700 bucks to rebuild. Do I have any other options? Does this sound about right? Between my Dad and I we have no problem getting it out, and back in. We just had the three injectors off and calibrated hoping that may have been also an issue, they checked out good and didn't improve operation...Any thoughts would be much appreciated!! Thanks in advance, Shawn.