During the Texas freeze last winter the rotor in my injection pump broke probably due to moisture and minus 13 temps. Located another one on the old interweb but when it arrived it was not the exact same numbers on the pump. i decided to run it anyway and the only problem was very little returns to the tank. BTW it was a used pump. Now the charge pump for lack of a better term seems ti be getting weaker and without a full tank of fuel it is getting harder and harder to start, not to mention the tach drive was broken when I purchased the tractor 20 years ago and I use it for a loader tractor and a host of other things. What I need to find is someone on here to walk me through rebuilding the charge pump. Is there anyone on HT that can help me with this? I would like to repair the factory pump without dropping 1500 bucks plus my labor.