Here is a couple pictures from our previous trailer after I brought it home.
As you can see the previous owner liked to use the grease zert to pack the bearings!
I personally hate those things and would NEVER use them. Hand packing every time.
BTW, many, many years ago I worked as a truck mechanic and no one I ever saw in the garage ever used a torque wrench tightening bearings. I always use slip joint pliers and like most people here, tighten down and then back off then bring the nut up finger tight. Been working for me since I started working on vehicles in the early sixties.
