Keep Your Freightliner Cool: Summer Maintenance Tips for the Road Ahead

As temperatures rise, your Freightliner works just as hard—if not harder—under the intense summer heat. Whether you're hauling cross-country or navigating regional routes, warm weather can take a toll on your truck’s critical systems. Proper summer maintenance helps ensure you stay safe, avoid breakdowns, and keep your cab comfortable all season long. Here’s a look at what every Freightliner owner or fleet manager should keep in mind when prepping for summer driving.

1. Air Conditioning System Check

There’s nothing worse than hitting the road and realizing your A/C isn’t cutting it. Before the summer heat kicks into high gear, have your air conditioning system inspected by a certified technician. This includes checking:

• Refrigerant levels
• Compressor operation
• Cabin air filters
• Blower motor performance

A quick A/C tune-up can prevent costly repairs and keep drivers comfortable, focused, and safe behind the wheel.

2. Cooling System Maintenance

Your engine generates a lot of heat, and in the summer, it needs even more help to stay cool. Inspect your Freightliner’s radiator, hoses, and coolant levels to ensure everything is in good working order.

• Look for any leaks or cracks in hoses.
• Test the coolant mix and replace if needed (it should be a 50/50 mix of coolant and water).
• Ensure the radiator cap maintains proper pressure.

An overheated engine can quickly derail your schedule—and your wallet.

3. Battery & Electrical System

High temps can be just as tough on your battery as freezing ones. Make sure your battery is tested for voltage and that the terminals are clean and corrosion-free. Also, ensure all wiring is secure and that alternator performance is strong.

4. Tire Inspection & Inflation

Tires are especially vulnerable in summer due to the expansion of heated air. Under- or overinflated tires can lead to blowouts—especially when combined with heavy loads and hot pavement.

• Check tire pressure weekly and adjust to manufacturer specs.
• Look for tread wear, cuts, or bulges.
• Rotate and balance tires as needed.

And don’t forget to check the condition and pressure of your spare tire.

5. Brake System Review

Heat can cause brake components to wear more quickly. Warped rotors, glazed pads, or low brake fluid can reduce stopping power—especially on long downhill grades.

Have your brakes professionally inspected to ensure they're summer-ready. This includes checking pad thickness, rotor condition, and hydraulic lines.

6. Inspect Belts & Hoses

Rubber components like belts and hoses can dry out and crack in the summer heat. A snapped belt can cause engine failure, while a ruptured hose can lead to overheating.

Make it a point to check for:

• Visible cracks or fraying
• Loose connections
• Signs of leaks or excessive wear

Replace any questionable components before hitting the road.

7. Stay Stocked with Essentials

Finally, summer prep includes your own safety and comfort. Stock your cab with:

• Plenty of water
• Sun protection (hat, sunglasses, sunscreen)
• Emergency repair kit
• Extra coolant and windshield washer fluid

Trust Peach State Truck Centers for Your Summer Service

When in doubt, let the professionals handle it. Our expert service team specializes in freightliner maintenance and will ensure your truck is ready for the heat. Whether you need an A/C recharge, cooling system flush, or a full summer inspection, we’ve got you covered.

Schedule your summer service today and keep your Freightliner running cool, clean, and confident.