Upper roller for the 8" HUMMEL.
When replacing the upper roller we recommend replacing P123 (COMPRESSION SPRING).
Two additional parts that hold the roller in are P126 (SCREW) and P046 (NUT) in quantities of 2ea.
If your roller is not slightly higher in the center, does not have even rubber on both sides, and/or undersized it is time to change your upper roller to improve your tracking.