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Ultimate Preventative Maintenance Checklist for Semi-Trucks

Wayne Truck & Trailer Team
8 min read

Preventative maintenance is the backbone of successful fleet operations. This comprehensive checklist will help you maximize uptime, reduce repair costs, and ensure your trucks stay safe and compliant on the road.

Daily Pre-Trip Inspection

Engine Compartment

  • Check engine oil level and condition
  • Inspect coolant level and check for leaks
  • Verify power steering fluid level
  • Check windshield washer fluid
  • Inspect belts for wear, cracks, or fraying
  • Look for oil, coolant, or fuel leaks

Lighting & Electrical

  • Test all headlights (high and low beam)
  • Check turn signals and hazard lights
  • Verify brake lights and marker lights
  • Inspect reflective tape and reflectors

Weekly Maintenance Tasks

Tire Inspection

  • Check tire pressure on all wheels (including spare)
  • Inspect tread depth and uneven wear patterns
  • Look for cuts, cracks, or embedded objects
  • Check wheel lug nut tightness

Brake System

  • Test air brake system pressure
  • Check brake adjustment and slack adjusters
  • Inspect brake lines and air hoses
  • Verify parking brake operation

Monthly Service Items

Engine & Drivetrain

  • Change engine oil and filter (or per manufacturer schedule)
  • Check transmission fluid level and condition
  • Inspect differential fluid levels
  • Check DPF (Diesel Particulate Filter) status
  • Replace fuel filters as needed

Suspension & Steering

  • Lubricate all grease fittings
  • Inspect shock absorbers and air bags
  • Check leaf springs and bushings
  • Verify steering alignment and play

Quarterly Inspections

  • Complete cooling system flush and refill
  • Replace air filter and cabin filter
  • Inspect exhaust system and DEF components
  • Check battery terminals and charging system
  • Perform comprehensive brake inspection
  • Test HVAC system operation

💡 Pro Tip

Keep detailed maintenance records for each vehicle. This helps identify patterns, ensures warranty compliance, and increases resale value. Digital fleet management systems can automate tracking and send service reminders.

Cost Benefits of Preventative Maintenance

Without Preventative Maintenance

  • • Higher repair costs
  • • Unexpected breakdowns
  • • Reduced fuel efficiency
  • • Shorter vehicle lifespan
  • • More safety violations

With Regular Maintenance

  • • 3x longer engine life
  • • 40% fewer breakdowns
  • • 10-15% better fuel economy
  • • Higher resale value
  • • DOT compliance assurance

Need Professional Maintenance?

Wayne Truck & Trailer offers comprehensive preventative maintenance programs designed to keep your fleet running efficiently. Our ASE certified technicians follow manufacturer specifications and industry best practices.