English to German Tech/Engineering Mechanics / Mech Engineering Heavy equipment/Landmaschinen

From inside the baler, loosen the locking bolt (1) on the adjustment eccentric (2) for the front plunger roller. Insert a 1/2 in break over bar in the square hole (3) and rotate the adjustment eccentric as needed to lower or raise the plunger roller. Tighten the locking bolt.

Weiß einer von euch wie ich hier "break" übersetzen kann? Hier geht es um die Justierung von Kolbenrollen!