Overview:

   Measure the clearance between wheel flange and rail SP (the distance between the rail flange and the wheel flange) on both sides of the trolley. The measured value may not be larger than 2 mm on either side.

   If the clearance SP between the wheel flange and rail is too large, it must be readjusted by removing a number of distance rings. See Setting the clearance between wheel flange and rail.