So you would be at about 2,000lbs trailer weight, Polaris 1,450(empty) + trailer 500
It "can" pull that, but don't know if it "may" pull that much weight.
You will need to look up the year of the Ranger and then if it's an automatic or manual
Manuals are rated for less weight.
"Can" means it does have the ability to do something.
"May" means can it LEGALLY do something???
If your ranger is rated as 1,800lbs max. trailer weight and you pull a 2,000lbs trailer, and there is a problem, i.e. fender bender or other incident, your insurance company can just walk away from it and leave you holding the bag.
Plus any tickets/fines for being over weight.
Unless you were up around the 3,000lbs mark with trailer and bed loaded you should be fine as far as engine heat, 2.3's run cool for the most part.