8030 two problems

Need some help please, we have two problems with our 8030 first the alternator barring was squealing so I got a reman from AGCO put it on and it wouldn’t charge thought it to be defective so got another one same result. How do you get these one wire alternators to work is there a trick?? FYI the old one worked fine. Problem two engine sounds like it is missing always between 1500 and 1800 rpms but randomly example turning on the ends is the worst it has a flutter to it you can even see it in the exhaust puffing smoke, give it throttle and it stops run it pto speed no problem. We have had it to the dealer and they have checked everything they can think of fuel line suction side and pressure side, timing, fuel filter not sure what else. They thought they had it fixed but still randomly does it, very aggravating the pump was rebuilt in 08. If I put it under more load with the breaks it stops. If I give it more throttle it stops. It sounds like a fluttering really shows up planting corn it will be fine going down the row and then it just starts doing it. Any suggestion on either issue would be great. Thanks in advance; rieg swoh

Ed, Our 8010 has been doing the same thing.  The guy that rebuilt the inj. pump has looked at it 3 times.  Always gets running great but then 6-8 months later it is fluttering again.  When tightning this hex nut how much.....Should I go a half turn at a time and see if it makes a difference?  I also believe I read somewhere to put some of the weaker grade locktite on it to keep it from moving.  Does this sound right?  THanks.

You guys are great I will give this a try. I believe my manual has something about adjusting the governor. Any thoughts on the alternator. I can plant for about three hours and then head for the barn for a fast charge not getting enough done. Thanks so much for the adjustment idea. rieg..