You will often find answers to technical questions like this in the
Trail Manor Technical Library. When you first log in, you see a group of forums called Trail Manor Owners Community, and the Tech Library is in that list. A quick browse through the articles brings up this one, titled Torsion Bar adjustments.
https://www.trailmanorowners.com/for...d.php?t=19939\
Hope it helps you.
You can also use the Search function in the blue bar at the top of the pages, though I admit this function is a little funky.
Bill