Preventive Maintenance Level 1: Perform simple preventive maintenance operations according to standard operating procedures and schedules. Level 2: Prepare and perform preventive maintenance on all equipment (electrotechnical, automated, mechanical, pneumatic, hydraulic, etc.). Work on programmable logic controllers, robots, and manipulators. Level 3: Study, prepare, and perform preventive maintenance on all factory equipment, including programmable logic controllers, robots, and manipulators. …