Seasonal Semi Truck Trailer Maintenance

This guide breaks down the essential seasonal maintenance routines.

Spring Maintenance

Inspect Tires for Cold-Weather Damage

After a winter of cold starts and icy roads, tires often emerge worse for wear. Temperature fluctuations may lead to cracked sidewalls or irregular tread wear.

• Check for dry rot and embedded debris
• Ensure tread depth exceeds the legal minimum
• Verify proper PSI as warmer weather inflates internal pressure

Brake System Evaluation

Salt-treated roads in winter accelerate corrosion in your air brake components. Ensure your system is free of rust and moisture, especially around:

• Air tanks
• Slack adjusters
• Service chambers

Drain air tanks to remove built-up moisture and inspect air dryers for proper operation.

Suspension and Undercarriage Check

Spring is the time to address damage from potholes, ice, and debris:

• Inspect leaf springs and air suspension bags for cracking or wear
• Verify shock absorbers are not leaking or loose
• Check hangers and bushings for any signs of shifting or misalignment

Summer Maintenance

Cooling Systems Are Priority #1

Overheating is one of the most common causes of summer breakdowns. Your coolant system must be in top shape.

• Pressure-test the radiator cap and inspect coolant hoses for bulging or soft spots
• Flush and replace engine coolant if it’s discolored or hasn’t been changed per OEM spec
• Inspect the fan clutch for proper engagement during idle or stop-and-go traffic

Transmission and Differential Fluids

Heat causes lubricants to thin out, reducing protection.

• Check and replace gear oil in the differential
• Inspect transmission fluid for burnt odor or discoloration
• Clean transmission coolers and verify air flow over their fins

Air Conditioning and HVAC

A malfunctioning A/C not only reduces driver comfort but also affects alertness and productivity.

• Inspect refrigerant levels and cabin filters
• Check condenser fins for bugs or debris
• Test blower fan speeds and air output

Fall Maintenance

Battery Load Testing

Cold weather puts additional strain on electrical systems. Test and inspect the battery:

• Clean corrosion from terminals
• Load test for voltage drop under stress
• Confirm alternator output is within specification

Brake Adjustment and Lubrication

As temperatures drop, brake slack adjusters and S-cams are more likely to stick or freeze:

• Apply high-temp grease to all moving components
• Inspect for excessive brake lining wear
• Check brake chamber integrity and push rod travel

Lighting and Reflective Tape

Foggy mornings and early sunsets demand maximum visibility.

• Replace any dim or non-functioning bulbs
• Clean and inspect lenses
• Replace peeling or faded DOT reflective tape

Winter Maintenance

Anti-Gel Treatments and Fuel Filters

Diesel fuel can gel in freezing temps, starving the engine.

• Add anti-gel additives to every fill-up during sub-freezing periods
• Replace fuel filters more frequently to prevent clogging
• Drain water separators routinely

Air Dryer and Air Line Care

Water in air brake systems can freeze, leading to dangerous lockups.

• Service or replace the air dryer cartridge
• Ensure heater elements are functioning
• Inspect air lines for brittleness or cracking

Heating System and Cab Comfort

Defrosters, heaters, and bunk warmers aren’t just about comfort—they’re about safety.

• Check heater cores and hoses for blockage
• Inspect bunk heater units for carbon buildup
• Test defrost functionality across all vent positions

Year-Round Tips for All Seasons

Preventive Maintenance Scheduling

Proactive scheduling reduces roadside emergencies and DOT citations. DOT inspections should cover:

• Brake stroke measurements
• Tire and wheel-end inspections
• Suspension and frame checks
• Lighting systems verification

Keep a Digital Maintenance Log

Utilizing fleet management software or even a simple spreadsheet helps:

• Track component replacements
• Log oil/fluid change intervals
• Monitor recurring repair issues

Mobile Maintenance for Fleets

For larger operations, on-site trailer service allows for efficient maintenance without downtime. Services like preventive maintenance, ECM diagnostics, and DPF regeneration can often be performed in your yard, reducing transport and idle costs.

Protect Your Investment Year-Round

From tire pressure fluctuations in spring to air line freezing in winter, each season presents unique hazards to your semi truck trailer’s performance. Seasonal semi truck trailer maintenance isn't just good practice—it’s essential for safety, uptime, and cost control. When every mile matters, preparation is your strongest ally.

To keep your fleet running strong through all four seasons in Richmond, VA, reach out to Dog House Trailer Repair.