Semi truck preventive maintenance checklist

While all items matter, pay special attention to brake components, tire condition, fluid levels, and air systems. These systems directly impact safety and are frequently cited in DOT violations. Brake failures and tire issues are leading causes of preventable accidents, while fluid leaks often signal developing problems that could lead to costly repairs.

Document the issue with specific details, photos if possible, and assign a severity level. Address safety-critical items immediately before operating the vehicle. For less urgent concerns, schedule repairs at your earliest convenience and monitor the issue to ensure it doesn’t worsen. Never ignore problems, as they typically become more expensive and dangerous over time.

Review your truck’s manufacturer maintenance recommendations and add any model-specific items to the checklist. Consider your operating environment and typical cargo to include additional relevant inspection points. You might also adjust inspection frequencies for components that experience more wear based on your specific operations.

Basic tools include a tire pressure gauge, flashlight, inspection mirror, and basic hand tools for minor adjustments. More thorough inspections benefit from a multimeter for electrical checks, brake measurement tools, and fluid analysis equipment. The most important tool is knowledge—understand what you’re looking at and what constitutes normal versus abnormal conditions.