Hitch Ratings
#1
#2
The only way you are going to be able tow that is get a F350 or bigger vehicle. The trailer 7700# plus a mini excavator roughly 10,000# is way to much for a F150 to handle regardless of how you set it up.
#3
Without WD (weight distribution) bars you will need a Class IV or Class V hitch rated at 9k. The Class V will be a 2.5" reciever...(BIG and expensive)
You can get Class V ball mount/ball rated at 13k without going to a pintle.
(dsq3973 , Mini-X's weigh between 3600 and 17000 lbs and his trailer is only about 2600lbs not 7k.... it's rated for 7k.)
A 7700# trailer GVWR only weighs about 2.6k. You can tow a small one; but the above post has a point. This size load is usually best left to a Super Duty if used on any type of regular basis.
#4