Cub Cadet 7275 Stalling Mystery

[Dougryan]

I have a 7275 3 cyl diesel.
I has been running fine for over a year (just bought it last summer). This spring I replaced the battery and ran it for several months without an issue.
About 2 weeks ago, I was moving some firewood... I turned the throttle down when I was loading up the bucket with wood, then got on the tractor and throttled up and it stalled.

As a side note, the battery is dead. I believe I have a charging system issue that I have not figured out yet.
So I have to jump start it using my truck. Not sure if that is related to the stalling issue, but including it just in case.

OK, so I just start it and run it for another half hour and it stalled again. This happened a couple more times before I called it quits for the day.

Did some research and it seems that fuel and air delivery issues could cause it to stall.
Topped off the fuel, cleaned the air cleaner, replaced the fuel filter.

Jump stared it a few days ago and ran my brush hog for about 90 minutes without any issues. I thought my problem was solved... then it stalled.

What can I try next?
Thanks in advance.
Doug

 

[Dougryan]

Progress... I think.
I ended up buying a replacement fuel pump. There are two, the first is back by under the fuel tank and is a low pressure pump.
Got it installed and tried to start the tractor. Started right up and ran until it ran out of fuel. I shut off the fuel valve before I pulled the old pump off and forgot to turn it back on.

Then it would start, sputter, and stall.
I pulled the fuel line off at the engine and turned the key on to run the primary pump and get air out of the line.
After that it started and ran fine for about 2 hours.

Then I had it parked in the driveway while I was pulling some stuff out of the garage and it stalled!!!!
Nooooooo!!!!

What's going on with this machine?