As you mentioned, you made a mistake. I suspect either your expectations were larger or you still have a problem. Either way, if I was you and had a tractor that was as new as this, I would sell it. You would be suprised how easily a clean, warranted tractor will sell for. Advertise in California. One huge bonus is whoever buys it here will not be paying sales tax. That will make it very attractive. Keep it and be miserable or sell it and buy another brand and more HP. Your experience here is not reflected by many if any other owners of the
L3130 to the degree you have experienced.
When you mention the fumes, power steering and .1 mph, this is where I suspect you have issues regardless of technique. In low, unless your tied to a tree, the tractor will easily reach 4 mph, the max speed in that range. If the engine is OK, then the HST is not.
At any rate, I wish you the best with your situation. I'm pretty sure faced with the same issues your experiencing, my dealer would really work with me to either diagnose or replace the tractor. With a unscratched, very low hour machine, (basically new) you are in a great position to do something about it right now. That's what I did. I had a
L48 that after many hours of cleaning and about 200 hours was sold for near new. The fella who bought it wondered why I was asking so much ($2000 less then retail). I said because it really boils down to about $4000 less when you consider the 7.25% tax that he would pay if buying new. He agreed and thought the tractor a good deal which it was. I got a ton of work done for one year. It cost me $4000 or so to do that which was not great, but in the end, I ended up with what I needed, a
L3830 HST with TnT. I suggest you consider it for your tractor.