Keeps machinery and mechanical equipment operational by performing preventive maintenance (i.e., check, clean, lubricate, adjustments/repairs) tasks on machines and equipment (i.e. extruder, mixer, feeders, pelletizers) with the guidance of the team leader or a Level 3 co-worker. Changes machine settings throughout the process, with the guidance of the team leader or Level 3 co-worker, by adjusting functional parts of devices and control instruments using various types of settings and tools to assure product quality: recording changes on the labor sheet.