Open-end wrench 13 mm (2) 1. Switch on the motor, set it to the maximum belt speed and check how the belt tracks on the machine. 2. If the belt goes off line in one direction, loosen the lock nut (2) at the turnbuckle and carry out corrections at the adjusting nut (1) as follows: Note: It is important for proper weighing that the belt runs laterally centered on the weigh deck.