A heavy-duty truck mechanic, also known as a diesel technician or heavy equipment technician, specializes in maintaining, diagnosing, and repairing large trucks, commercial vehicles, and heavy machinery. These mechanics possess in-depth knowledge of diesel engines, hydraulic systems, electrical systems, and other components specific to heavy-duty trucks. They work in various settings, such as trucking companies, construction companies, equipment rental companies, and fleet maintenance departments.

Responsibilities:

1. Inspection and Diagnostics: Conduct thorough inspections of heavy-duty trucks and equipment to identify mechanical, electrical, and hydraulic issues. Utilize diagnostic tools and equipment to diagnose problems accurately and efficiently. This includes assessing engine performance, transmission systems, braking systems, steering components, and other critical parts.
2. Repair and Maintenance: Perform repairs and maintenance tasks on heavy-duty trucks and equipment. This involves disassembling, repairing, and replacing faulty components, such as engines, fuel systems, exhaust systems, hydraulic systems, and electrical systems. Conduct routine maintenance procedures, including oil changes, filter replacements, and lubrication.
3. Troubleshooting: Identify and troubleshoot issues with hydraulic systems, including pumps, cylinders, valves, and hoses. Diagnose and rectify electrical problems, such as wiring, circuits, batteries, and lighting. Utilize computerized diagnostic systems to diagnose engine management systems and other electronic control systems.
4. Welding and Fabrication: Perform basic welding and fabrication tasks, including metal cutting, welding repairs, and modification of truck bodies and equipment. Ensure adherence to safety standards and proper welding techniques.