Summer’s tough on your truck and trailer. Long hauls in hot weather can stress out every part of your vehicle, from your tires to your cooling system. Heat affects everything: your battery, your brakes, even your axles. Without regular maintenance, small problems can grow fast and eventually lead to downtime you can’t afford. That’s why giving your truck and trailer a little extra attention in the summer months can make a big difference. Whether you’re an owner-operator or managing a fleet, here’s a smart checklist to help you keep everything running safe and strong.
1. Monitor Tire Pressure:
Hot pavement and rising temps can cause tire pressure to increase. That extra pressure increases the risk of a blowout which can leave you stranded and can even damage nearby components like your suspension system or axle spindles. Keep a good tire gauge and refill kit with you on every trip, and check truck and trailer tire pressure often—adjusting for temperature changes.
2. Don’t Let Your Cooling System Overheat:
Your engine works harder in the summer—and so does your cooling system. If your radiator is clogged or your coolant’s low, you’re at an increased risk of overheating. Check your radiator, hoses, water pump and coolant level before the next trip. Top off with the right type of coolant and consider a flush if it’s been a while, your truck will thank you.
3. Make Sure Your A/C Doesn’t Quit on You:
When you’re driving through hellish conditions, working A/C is a necessity. If your cabin starts to bake, your focus and endurance suffer. Check refrigerant levels, clean or replace cabin air filters and test the A/C for consistent cooling. If it’s blowing warm, it’s time to get it serviced.
4. Heat Drains Batteries:
High temps can shorten your battery’s life. Before it quits when you need it most, check terminals for corrosion, test voltage output and secure all connections. Consider carrying a portable jump starter, especially for remote routes where help could be hours away.
5. Brakes Are Working Overtime:
Brake components wear faster in the heat, especially during heavy braking or stop-and-go traffic. Look over your pads, brake fluid levels and lines. Squealing, spongy pedals or longer stops are signs it’s time to service. Better safe than sorry on a downhill load.
6. Protect Your Truck from the Sun:
Summer sun can crack dashboards, fade paint and weaken interior materials. It’s more than just cosmetic, it’s long term damage that can accumulate. Use UV-protectant sprays on the inside. Apply a fresh coat of wax on the outside, throw in a windshield shade and consider seat covers to fight the heat.
7. Driver Comfort + Emergency Kit:
When the A/C goes out or you’re stuck roadside, a well-stocked kit can be a lifesaver.
Items to include:
- Lightweight clothing
- Water bottles
- First aid kit
- Flashlight
- Phone charger
- Spare belts
- Coolant
- Portable fan
- Sunglasses
- Sunscreen
8. Mid-Summer Checkup:
Even if everything looks good, summer wears out parts fast. A professional once-over can catch problems before they really hit your wallet. Set a calendar reminder for a mid-season service. Bring your truck in for a quick inspection.
9. Don’t Forget the Trailer:
Your trailer takes as much heat as the truck. Worn tires, lights and suspension can all cause problems under a heavy load. Check your spindle area for signs of stress and don’t skip trailer tire, brake, and spindle checks.
10. Fluids—Don’t Let Anything Run Dry:
Summer heat accelerates fluid loss. From engine oil to windshield washer fluid, every system in your truck relies on proper fluid levels. Check your oil for both level and viscosity, monitor brake and transmission fluids, and don’t overlook power steering or differential fluids. Regularly changing and topping off hub oil goes a long way toward preserving spindle integrity. And remember—you need fluid too! Drink plenty of water to stay sharp and safe behind the wheel.
Summer means long days, high heat, and excessive wear and tear. But with smart, consistent maintenance, your truck and trailer can handle the pressure. Keep a close eye on the usual suspects—tires, brakes, coolant, and A/C, and don’t forget the hidden heroes beneath the frame, like your axles and spindles. Many drivers don’t realize truck and trailer wheel hubs contain critical lubricant that needs regular checking, draining, and replacement to protect vital parts like the bearings and spindles. If you’re unsure or spot signs of wear, our network of 80+ certified shops across North America is ready to help. Visit our Find Facility page to connect with a spindle specialist near you.
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