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Here is who is shown on the Prestolite page... not sure if its helpful. I would call any local alternator repair shops (if you can even find one) to see if they can service what you have.

That price point has moved up: https://prestolitesuperstore.com/Category/110-489/Prestolite-Leece-Neville-8MR3005C-New-Alternator-8MR-Series-Spool-Mount-type-24V-35A/ Only units I see available right now online. Rebuilding will be cheaper.

You will not find off the shelf anywhere. You should find an alternator shop (preferably one who carries Prestolite) to rebuild what you have.

This

That is the droop adjustment. That changes the rate at which the governor plays catchup on load shifts. I don't know if that can be messed with enough to display what you have. You may end up needing to pull that gear cover to inspect the governor linkage and all moving parts in there.

Well the injectors will limit the amount of fuel going into the cylinder, the pump can push as much as it wants, its limited by the orifice sizes in the injector. Your engines definitely got some gremlins at the present time (two do have white smoke at start). I think you may want to pull the...

Yeah it could be a failed alternator, or even a missing FU1 fuse (I put nothing by anyone these days). If you need panels, let me know. I've got new repro, and actually sitting on 1-2 complete sets of 802 panels at the moment.

Its not the pump, take my word for it. Just cut the capacitor out, and make up a weather tight jump cable to go between your cuts (insulated terminals, shrink tube solder fittings, etc) so you can retain the stock Packard boot.

This. They are known issues. Very easy to diagnose and fix the problem too.

I would remove the cast iron exhaust manifold and inspect the smoke color and air temperature of each cylinder. Here is an 802 I had recently worked on. The cylinder nearest the radiator was not getting fuel. Exhaust color was different, and the air coming out was cold. Before eval...

Yeah you aren't even close to the right operating RPM at that setting. I just took a quick photo of an 802 throttle position on one I am working on in my driveway this weekend... just for conversation purposes. You can see the rough gap between both set screw stops. This machine is dead on at...

He helped me out with something halfway across the country, up and above the call. Thanks for being 'one of the good ones' in the world!

Well being a brushless head, there should be no mechanical reasons on that side (unless there is something failing... but you would know pretty quickly if so) so its probably air or fuel related. The beauty of diesels... only so many issues can cause poor running.

Well you might want to check your input feed lines for ice buildup too, especially when you note the issue often occurs with cold starts too.

When was the last time you drained or changed out the water fuel seperator, or primary fuel filter? Do you filter your fuel before it goes into the machine, to remove excess water?

Its a function of cost and availaiblity... the latter being the bigger hurdle. Just not a whole lot of them out there.

Here is a DIY load bank setup that you can adjust and break down as needed (1) https://teamequip.com/genpro-gillette-cg03-01f-universal-military-electrical-distribution-spider-box-for-military-generators-120-240-volts-out/#mz-expanded-view-1248727738663 (*it has a make offer function, I bet...

Did you replace the water pump? I wonder if you have a pulley shaft that's out of round, and its causing the belt to walk? Under any other scenario, I don't know how it would walk like that if the pulleys are aligned. Can you get a straight edge in the machine and confirm both pulley faces are...

Well for coolant gauges you have a couple options (stock depending). This is a drop in replacement, but will read 15-20* higher than reality (though that has no effect on the coolant overtemp sensor which will still work properly if its too hot)...

Sorry to derail your thread