BDJ Trucking Co. · Safety Department
Preventive Maintenance Checklist Every Truck Driver Should Know
Every mile matters in trucking. Whether you're running OTR routes across the country or staying regional, a well-maintained truck keeps you moving, keeps your record clean, and keeps your paycheck coming. At BDJ Trucking Co., safety isn't just a policy — it's a culture we've built over 25 years on the road.
Breakdowns don't just cost money. They cost time, loads, and sometimes your safety record. The good news? Most of them are preventable. This guide walks you through a complete preventive maintenance checklist — the same standards our drivers and mechanics at BDJ Truck Repair follow every day.
Why Preventive Maintenance Matters for CDL Drivers
Preventive maintenance (PM) is the practice of regularly inspecting and servicing your truck before problems occur. For CDL drivers, this isn't just good practice — it's a federal requirement.
The FMCSA mandates that carriers maintain systematic inspection, repair, and maintenance programs for every vehicle in their fleet. Skipping maintenance doesn't just risk a breakdown — it risks out-of-service orders, CSA violations, and failed DOT inspections that can follow your record for years.
At BDJ, we believe the best repair is the one you never need. Here's how to make sure you never need it.
Pre-Trip Inspection Checklist
Daily — required before every run.
Engine & Fluid Levels
- Engine oil level — check dipstick, look for leaks underneath.
- Coolant level — never open a hot radiator cap.
- Power steering fluid.
- Windshield washer fluid.
- Brake fluid (if applicable).
- Transmission fluid.
Tires & Wheels
- Tire pressure on all 18 wheels, including spare.
- Tread depth — minimum 4/32" on steer tires, 2/32" on others.
- Visible cuts, bulges, or embedded objects.
- Lug nuts — check for looseness or missing hardware.
- Valve stems and caps in place.
Brakes
- Air pressure builds to proper PSI.
- No air leaks audible during static test.
- Brake stroke on all axles within adjustment limits.
- Brake chambers and slack adjusters secure.
- Parking brake holds on grade.
Lights & Electrical
- Headlights, low and high beam.
- Tail lights and brake lights.
- Turn signals at all four corners.
- Marker lights and clearance lights.
- Hazard flashers and reflectors.
Coupling & Trailer
- Fifth wheel properly latched — tug test required.
- Kingpin secure, no excessive play.
- Glad hands connected and sealed.
- Safety chains or cables in place.
- Landing gear fully raised and pinned.
- Trailer doors sealed and locked.
- Mud flaps present and undamaged.
Cab Interior
- Seat belt operational and not frayed.
- Horn works.
- Windshield wipers clear the glass properly.
- Mirrors adjusted and clean.
- Dashboard warning lights — none illuminated.
- Fire extinguisher present and charged.
- Emergency triangles or flares in cab.
- Logbook or ELD functioning.
Weekly Maintenance Checklist
- Grease the fifth wheel, especially in winter.
- Check battery terminals for corrosion and secure connections.
- Inspect belts and hoses for cracks, fraying, or looseness.
- Clean air filter or check restriction indicator.
- Test trailer brake system with full application test.
- Check all fluid levels again and top off as needed.
- Inspect suspension components, leaf springs, bushings, and U-bolts.
- Check exhaust system for leaks around joints and flex pipes.
- Wipe down and inspect all mirrors; replace cracked mirrors immediately.
- Test all lights from outside the cab with engine running.
Monthly Maintenance Checklist
Monthly checks go deeper into systems that degrade over time.
Engine & Filters
Engine oil and filter change, fuel filter inspection, coolant system flush, DPF status, and DEF system function.
Brakes & Bearings
Inspect brake linings for wear, wheel bearings for heat or grinding, and tire pressure with a calibrated gauge.
Chassis & Cab
Inspect cab mounts, body bolts, door hinges, latches, cab locks, and lubricate all moving hardware.
Fluids & Systems
Check all fluid levels, calibrate tire pressure, and inspect the coolant system for swelling or soft spots.
Seasonal Maintenance Tips
Winter Preparation
- Switch to winter-grade oil if operating in extreme cold.
- Check antifreeze concentration to at least -34°F.
- Inspect and test trailer heating lines if running reefer.
- Check chain requirements for your routes.
- Replace worn wiper blades before the first freeze.
- Keep extra DEF, washer fluid, and a warm kit in the cab.
Summer Preparation
- Check AC system before the heat hits.
- Inspect cooling system more frequently.
- Check tire pressure daily in hot weather.
- Inspect trailer refrigeration unit seals if running reefer loads.
Common Mistakes Drivers Make
Rushing the pre-trip
A pre-trip done in 5 minutes isn't a pre-trip. Take 30–45 minutes and do it right.
Ignoring small warning signs
A small air leak today can become a failed brake check tomorrow. Write it up immediately.
Skipping the post-trip inspection
The post-trip is your chance to document problems before the next run begins.
Not documenting defects
Even if you fix it on the road, document it. Undocumented defects create liability.
Letting tire pressure slide
Underinflated tires are a leading cause of blowouts. Always use a gauge.
When to Bring Your Truck to a Professional
Some things you can catch. Others require a certified mechanic. Bring your truck to a professional shop — like BDJ Truck Repair — when you notice unusual engine noises, brake fade, transmission slipping, excessive smoke, ELD fault codes, steering vibration, or air systems that won't hold pressure.
Our certified mechanics at BDJ Truck Repair in Schaumburg, IL handle diagnostics and emergency roadside situations. We know what keeps trucks moving — because we drive them too.
Final Thoughts
A preventive maintenance routine protects your CDL, safety record, income, and your life. At BDJ Trucking Co., we've been doing this for over 25 years, and we know a disciplined inspection routine makes the difference.
Need a reliable truck repair team? Contact BDJ Truck Repair in Schaumburg, IL. Looking to drive for a company that puts safety first? Apply at BDJ Trucking today.