Diagnose and repair hydraulic and diesel systems in heavy machinery.Perform preventative maintenance on hydraulic and diesel equipment.Troubleshoot and resolve issues with hydraulic and diesel systems.Inspect and test hydraulic and diesel components for proper functioning.Replace faulty or worn hydraulic and diesel parts as needed.Maintain accurate records of repairs and maintenance performed.Follow safety protocols and regulations while working on hydraulic and diesel systems.Stay up-to-date on industry trends and advancements in hydraulic and diesel technology.Collaborate with other mechanics and technicians to identify and solve complex problems.Provide guidance and training to junior mechanics and technicians.