OK got the tractor cranked this afternoon. I checked the battery while it was running and getting 18.5 volts. Looks like the alternator is doing some damage to the battery causing it to be not strong enough to get it started. Not sure why this didn't show up in the load test.
Can I just get a regulator or do I have to replace the alternator also?
First you need to be EXTREMELY careful with being around that battery!
18.5 is an open voltage regulator circuit and the battery now has the potential to explode at any time. DO NOT start the tractor again for any reason. Wearing safety glasses and gloves with NO possible ignition sources in the area carefully disconnect the neg battery cable then the positive. Get the battery to a safe place, where if it were to explode it will not injure or do property damage. Trust me- I'm speaking from experience from owning and operating a foreign auto shop.
Once the battery is safely stored, possibly covered by an inverted barrel or HD trash can outside, then you can address the charging system.
I can't say whether your particular voltage regulator is integral to your alternator or replaceable by itself. Either way Wallace or someone else in the know about Kioti parts can probably say what's what on that issue.
If your alternator is rebuildable or able to be exchanged for a re-manufactured unit is also not known by me- but exists as a consideration.
Either way, when all is said and done the 18.5 V's is enough to have done possible damage to other parts of your electrical system. Check your fuse box for any blown fuses and all wires for signs of arching or burnt or melted jacketing.
Be very careful and have baking soda and a hose nearby and someone else nearby, out of harms way, in case things go wrong. You do NOT want to be trying to deal with the aftermath of an exploded battery if a worst case scenario comes to pass. Better prepared than oblivious, I always say!:thumbsup:
Good luck- post back results.