I own a 4410 which is pretty much the same tractor but the engine is a 35 hp. I belive the 4310 is something like 32 hp. I have the ehydro but if I bought another tractor, I would get a tractor with a manual transmission and a power reverser. The eHydro has done well but I am not a big fan of the electric options that I cannot work on and are real expensive to replace.
These tractors have a VERY bad problem with the battery location in front of the transmission cooler and radiator. The battery vents corrosive gases that eat up the radiators. If you catch it in time and replace the OEM battery with the a sealed battery, that fixes the problem but many don't realize it until it is too late.
The drive axle housings and transmission case is made of cast aluminum so these are NOT ag tractors or tolerant of real hard use. For most users these tractors perform very well provided you realize and operate them as light duty compact tractors.
The transmission oil and filters must be changed every 400 hours which many ignore at their own expense. It is a pricey service but not so bad if you do it yourself.
I strongly recommend you change all the filters and fluids unless the previous owner can show you receipts or good proof they have been recently done. Strip off ALL of the panels and give it a good cleaning with a compressed air gun to clean up the dirt and grass debry especially in the radiator area.
I installed a block heater and will install the transmission heater on the next service. I also installed the arm rest kit which makes a nice operator touch. Do a search of the old posts on my 4410, they go into a good bit of detail.
Congratulations on the new machine and welcome to Tractor Forum! Sounds like you bought a real nice tractor package.
On edit: I saw you double posted in the big tractor section. I deleted that post so you won't get cross posts with folks thinking you have the older 4000 series ag tractor since the 4310 is a compact tractor.