Preventive Maintenance Schedule for Fleets

Preventive maintenance (PM) is the single highest-ROI operational spend for a trucking fleet. Fleets running structured PM see 40–60% lower unplanned downtime and 20%+ longer tractor lifespans.

A/B/C/D Service Intervals

A-service (every 15k mi): lube, filter, DVIR review. B-service (30k): + brake inspection, tire rotation. C-service (60k): + differential, DPF, cooling. D-service (100k+): major inspection including injectors and turbo.

Data-Driven Scheduling

ELD mileage + engine-hour data should trigger PM alerts automatically. Manual reminder tracking misses 15–20% of intervals.

Tire Program

Rotate at 40k, retread strategic drives at 200k. Track cost-per-mile per tire brand for real ROI comparison.

Emissions Systems

Post-2010 tractors need DPF regen and DEF discipline. Neglect turns into $8k–$15k emissions repairs quickly.