-Loosen the bolts, item 6 on the half coupling mounted on the mobile roll-Rotate the screw item 7, in one direction or the other according to the off set direction observed-Tighten 2 bolts item 6 diametrical on the coupling flange item 2-Make a few clay briquettes-If the adjustment is adequate ( diagram N°2), tighten the other bolts item 6 with a tightening torque of 325 Nm-If there is an off set ( diagram N°1), repeat the adjustment operations again