OP
I have an Emax 20s HST 15 hrs on it. Similar issue. 3rd time I used the mower and mid PTO, about 30 minutes in to cutting everything went electrically dead as the engine shut down. Low evenly mowed grass hardly any load on the tractor at all.
Pulled the fuse box and found that only the PTO fuse was blown. I replaced the fuse, checked the wiring for any visual problems, found nothing? Put my hand on the PTO, it seemed fairly hot, I'm guessing 100-150DegreesF? I ran the tractor again, and 10 minutes the engine died and instruments went blank. Sure enough the fuse was blown. Put another 5 amp fuse in it started right up and and called the dealer.
I took it back to the dealer without the mower deck on thinking, they'd put a meter on the solenoid and check resistance. All they did was run it with the PTO engaged and unloaded for 30 minutes. Could not duplicate the fault. They never checked the solenoid for resistance, or the battery voltage, alternator output etc. Just said take it home and run it. (I'm guessing I'll get a diagnostic bill for having them start it up and let it run with PTO engaged, then come back 30 minutes later and say its good to go.)
I loaded it up, took it home, and duplicated the failure in 30 minutes run time. I did however verify latent battery voltage to be 12.8v normal. Alternator output running to be 14.3v normal. Cold solenoid resistance at 2 ohms, I'm not sure what it should read, the dealer wont sell me a service manual or CD. After the tractor died the solenoid was showing nearly a dead short at .2-.3 ohms. I didn't have a laser thermometer with me, so I don't know what the PTO clutch case temp was. Only this time, when it cooled down the PTO solenoid remained at a dead short. (I'm guessing its fried.)
At this point its back at the dealer today. My estimation is a bad solenoid??? or did the PTO clutch cause the failure??
The SCUT is a year old and still under warranty, I'm wondering how much they're going to try to charge me to fix it?
Im trying to post a link to the parts manual that corresponds to or tractors, but the site says I must have 3 posts to paste a pdf link