The “correct” answer is to check the owner manual and see if the weight of the trailer is within the rated trailering capacity for your tractor but I doubt that’s the answer you’re looking for.
I have a 30’ 9,000lb bumper pull camper I sometimes move with my L4701 which I am aware is a larger machine. The 4701 is rated for a 6,000lb trailer. Pulling the 9000lb trailer on relatively flat solid ground is not a problem. What I have to be careful with is stopping it, particularly since I don’t have use of the trailer’s brakes like I can with my truck. I would not want to get it on much of a slope. Other than that, the only concern would be whether your tractor can handle the tongue weight. If the tongue weight is within specs for your 3 point that’s swell so long as you have a loader or weights on the front so you don’t end up with the front of the tractor pointed at the sky. On flat ground and low speeds there’s not much danger of losing control. I usually leave the tongue jack down a bit so if I got in a real bind I could drop the 3 point and ground the trailer tongue on the jack. If you’re in low range and your tractor clearly doesn’t want to pull it, just stop and get your truck. Just have to be smart about it if your going to tow something well over the rated trailer capacity of the tractor.
Hopefully someone with a machine more similar to yours will weigh in with some real world experience.
By the way, if you’ve ever been driving a tractor or truck with the tow unit’s wheels locked and a trailer pulling you down a slope out of control, it’s an experience you won’t want to repeat.