Winter is Coming: Essential Semi-Trailer Maintenance Tips to Keep You Road-Ready

Photo by Harrison Haines

Winter is around the corner, and for fleet managers and owner-operators; that means it’s time to get your trailers ready for the cold. Freezing temperatures, icy roads, and road salt can all take a serious toll on your equipment. The last thing you want is unexpected downtime when you’re hauling through snow or freezing rain. 

The good news? With a few preventive steps now, you can keep your trailers in top shape and your operations running smoothly all winter long. Here’s a checklist of key maintenance tasks to prepare your semi-trailer for the season ahead. 

1. Inspect Your Brakes and Air Systems

   Cold weather can cause moisture in your air lines to freeze — and frozen air lines can quickly lead to brake failure. To avoid that risk:

   • Drain your air tanks regularly to remove trapped moisture. 
   • Inspect hoses for cracks or leaks. 
   • Check brake linings, drums, and slack adjusters for wear or corrosion. 
   • Make sure your air dryers are functioning properly — they play a big role in preventing moisture buildup.
2. Check Tires and Tread Depth

   Cold air reduces tire pressure, which affects traction and increases wear. Before the temperature drops: 

   • Check and adjust tire pressure according to manufacturer specs. 
   • Inspect tread depth — a minimum of 4/32” is recommended for steer tires and 2/32” for others, but deeper treads perform better on ice and snow. 
   • Look for uneven wear, sidewall damage, or embedded debris. 
   • If you’re operating in areas with heavy snowfall, consider tire chains or winter-specific treads.
      
3. Protect Electrical Systems and Lighting

   Electrical problems are common in winter because moisture, corrosion, and road salt can damage connectors and lighting systems. Here’s what to check: 

   • Test all lights and replace any burnt-out bulbs. 
   • Inspect connectors for corrosion or loose fittings. 
   • Apply dielectric grease to prevent moisture intrusion. 
   • Secure wiring harnesses to prevent chafing or exposure to ice buildup.

     Tip: Keep a few spare lights and connectors on hand. Our parts departments across all Great Western Trailer locations stock quality replacements for most trailer makes and models.

4. Inspect the Trailer Body, Roof, and Doors

   Freezing rain and snow can cause minor cracks to expand — and those cracks can lead to leaks or structural damage. Before winter sets in:

   • Inspect the roof, side panels, and floor for signs of damage. 
   • Replace worn door seals to keep out moisture. 
   • Lubricate hinges, latches, and locks to prevent freezing.

     If you spot damage, our body and roof repair teams in OKC and Fontana can quickly patch, seal, or reinforce your trailer before winter weather makes it worse.

5. Guard Against Corrosion

   Salted roads are one of winter’s biggest enemies. Salt eats away at steel components, frame rails, and electrical systems. To prevent that: 

   • Wash your trailer regularly, especially the undercarriage. 
   • Apply a protective anti-corrosion coating on landing gear, suspensions, and frame. 
   • Inspect fasteners, brackets, and exposed metal for early signs of rust.

     Our service centers can help with undercarriage cleaning and anti-rust treatments to extend your trailer’s lifespan through harsh conditions.

6. Stock Up on Winter-Ready Parts

   When the temperature drops, certain components tend to fail faster — like air dryers, seals, and electrical connectors. Keeping spares on hand can save you hours (and headaches) on the road.

   At Great Western Trailer, we stock a wide range of OEM and aftermarket trailer parts, including:

   • Brake chambers and air valves 
   • Electrical connectors and light assemblies 
   • Landing gear and suspension components 
   • Winter-grade lubricants and fittings 

You can find parts and expert support at any of our 10 convenient locations: Tulsa, Oklahoma City, Dallas, Houston, Arizona, Dearborn, Albuquerque, Salt Lake City, Fontana, and Grants Pass.

Preparing your semi-trailer for winter isn’t just about preventing breakdowns — it’s about keeping your drivers safe and your loads on schedule. Regular maintenance before the cold sets in can help you avoid costly repairs later and keep your fleet on the road when it matters most.

Schedule your winter maintenance or inspection today at your nearest Great Western Trailer location. Our expert technicians can help ensure your equipment is ready for whatever winter throws your way.