Is preventive maintenance required by law?
Yes. Under 49 CFR 396.3, every motor carrier must systematically inspect, repair and maintain the vehicles it controls and keep their parts in safe and proper operating condition at all times. For each vehicle it controls for 30 consecutive days or more, it must keep a record of its identification, the nature and due date of upcoming inspection and maintenance work, and the date and nature of the inspections, repairs and maintenance done.
How often should a semi truck get a PM?
There is no federal mileage interval. Follow the engine and truck maker's service schedule, which usually changes with the duty cycle: idle time, short hauls, heavy loads and dusty roads shorten it. Many fleets schedule each PM by miles, engine hours or months, whichever comes first, and use oil analysis to adjust drain intervals.
What is the difference between PM A, PM B and PM C?
They are shop names for service levels, not federal terms. A common split: PM A is an inspection with chassis lube and fluid top-off, PM B adds the oil and filter change, and PM C adds longer-interval work such as coolant, transmission and differential fluids and valve adjustment. Use your shop's list and the maker's schedule.
Is the annual DOT inspection the same as a PM?
No. Under 49 CFR 396.17, the tractor and each trailer must pass a periodic inspection of the parts in Appendix A to Part 396 at least once every 12 months, done by a qualified inspector, with proof on the vehicle. The report is kept for 14 months under 49 CFR 396.21. A PM can include it when it falls due.
How long do I keep maintenance records?
Under 49 CFR 396.3(c), for 1 year where the vehicle is housed or maintained and for 6 months after it leaves your control. Annual inspection reports are kept 14 months (396.21) and driver vehicle inspection reports 3 months (396.11).
Can I print it blank?
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