Another vote for not putting that much weight on your front bumper.
Due to the drought in our area, we've been hauling 2 300 gallon totes full of water in a tandem axle dump trailer out to the pasture on a regular basis. We've been towing that weight with the 841 (not much different than your 3600). Ours has loaded 14.9 rears and the 1100 pie weights. We use a 3 point hitch trailer mover, which is stronger than a draw bar, in my opinion. The bad part about it is how far back the ball is (tongue weight makes the front light).
What's the tongue weight of the chipper? That will make a big difference. Are your tires loaded? If the tires aren't loaded, you will want to be super careful going down hills.