Running a Hot Drum for several hundred miles could result in a warped drum or glazed shoes.
While turning the wheel with one hand I adjust the shoes till they stop the wheel. Then back off 3 clicks. This should result in a free truning wheel. If there is a high spot in the drum I will back off another 1 or 2 clicks.
If you are installing new shoes do this adjustment and the after a couple hundred miles do it again. This address what the mechanic said but with out running the risk of destroying a set of shoes and the drum.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles