Repairs and maintains vehicles and equipment, including tune-ups, electrical system repair, transmission, and differential rebuilding, clutch assembly replacement, oil changes, and lubrication, and diagnostic work; Rebuilds or repairs air, hydraulic, drum, and disc brake systems; Performs small engine diagnosis and repairs; Repairs heavy equipment in the shop and on job sites; Troubleshoots and diagnoses mechanical malfunctions for a variety of vehicles and equipment; Test drives vehicles to diagnose malfunctions and to ensure they are working properly after maintenance or repair; Repairs and modifies equipment using welding and cutting torches; Installs sirens, lighting systems, two-way radios, and other emergency equipment; Orders replacement parts as needed; Repairs hydraulic systems on small, light, and heavy equipment; Conducts state-required safety and emissions inspections; Prepares various records; and. This position repairs and maintains gasoline, diesel, alternative fuels, and hybrid engines; and performs various repairs, maintenance, and welding tasks on small and light trailers and heavy vehicular equipment.