How to Prepare Heavy Haul Trucks for Extreme Summer Heat

When summer temperatures rise, so do the risks for heavy haul trucking operations. Heat affects everything from engine performance to tire pressure—and when you're moving oversized loads, there's no room for mechanical failure. 

Preparing your heavy haul trucks for extreme summer heat isn't just about comfort; it's about safety, efficiency, and protecting your investment. Here's how to get your fleet ready for high temperatures.

Inspect and Maintain the Cooling System

The cooling system is your first line of defense against overheating. Start by inspecting the radiator, water pump, coolant hoses, and reservoir. 

Look for leaks, cracks, or corrosion. Summer is a good time to flush old coolant and replace it with the correct coolant-to-water ratio, typically 50/50, but check your truck’s specs. 

Don’t forget the thermostat and fan belts—they need to be in top shape to keep your engine cool under pressure.

Check Tire Pressure and Tread Depth

Heat causes air to expand, which means your tires are at greater risk of overinflation and blowouts. 

Check tire pressure daily during extreme heat, especially when hauling oversized or overweight loads. Ensure tread depth is within safe limits and inspect for uneven wear. Heat-stressed tires are a leading cause of summer breakdowns in heavy haul.

Test the Air Conditioning System

Your drivers spend long hours on the road, and a functioning air conditioning system is more than a luxury—it helps reduce fatigue and maintain alertness. 

Make sure the A/C is blowing cold, inspect for refrigerant leaks, and check that the cabin filter is clean. A comfortable driver is a safer driver, especially in high-heat situations.

Inspect Brakes and Fluids

Hot weather increases the strain on braking systems, especially when transporting heavy or oversized cargo. 

Check for worn brake pads and ensure brake fluid levels are adequate. High temperatures can cause fluid to thin, reducing braking power. 

Also, inspect transmission and engine oil, as they can degrade faster under extreme heat.

Plan for Heat-Related Emergencies

Keep extra water, coolant, and emergency supplies in every truck. Review protocols for heat exhaustion and breakdowns. Pre-plan routes with rest stops and fuel stations where drivers can cool down and inspect equipment.

Staying ahead of summer’s heat isn’t optional in heavy haul—it’s essential. With proper prep, your fleet can keep moving safely and efficiently, no matter how high the mercury climbs.

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