Fleet Maintenance Checklist: Keeping Your Vehicles Running Efficiently in Summer

June 16, 2025

Summer heat isn’t just tough on people, it’s tough on fleet vehicles, too. At Action Supply, we understand how critical fleet reliability is to your operations. Whether you're hauling heavy loads, navigating tight job sites, or servicing offshore projects, extreme temperatures and humidity can take a serious toll on your equipment.



Now’s the time to make sure your vehicles are prepared to handle the demands of summer. Use this practical maintenance checklist to help avoid costly breakdowns and keep your fleet running smoothly all season long.


1. Check and Top Off All Fluids

Hot weather causes fluids to evaporate more quickly, which can lead to overheating or system failure.


Make sure to check:


  • Engine oil
  • Transmission fluid
  • Brake fluid
  • Power steering fluid
  • Coolant/antifreeze


Keep extra fluid on hand and make topping off a regular part of your fleet inspections.


2. Test the Battery

High heat can shorten a battery’s lifespan by evaporating internal fluids and increasing corrosion. Inspect terminals for buildup and ensure batteries are fully charged and securely mounted. If a battery is more than three years old, consider replacing it before summer puts it to the test.


3. Inspect Belts and Hoses

Belts and hoses are especially vulnerable to cracking and failure in high temperatures. Look for:


  • Soft spots
  • Bulges
  • Fraying or cracking
  • Loose connections


At Action Supply, we stock a wide selection of industrial hoses and hydraulic fittings so your crew can get what they need without delay.


4. Ensure the Cooling System Is Working Properly

Your engine cooling system is the frontline defense against heat-related breakdowns. Inspect the radiator, water pump, thermostat, and hoses for signs of wear. Make sure the coolant is clean, filled to the correct level, and mixed according to manufacturer specs.


5. Inspect Tire Condition and Pressure

Hot pavement can cause under inflated tires to flex more than usual, increasing the risk of blowouts. Check:


  • Tread depth
  • Tire pressure (often affected by heat)
  • Sidewall condition


Don't forget spare tires and trailer tires, too.


6. Stock Up on Emergency Supplies

Every fleet vehicle should carry a summer-ready emergency kit including:


  • Extra water
  • First-aid kit
  • Reflective triangles or flares
  • Jumper cables
  • Fire extinguisher
  • Portable fan or cooling towels


Need supplies? Action Supply offers PPE and safety gear designed for Texas heat and demanding environments.


7. Schedule Preventive Maintenance in Advance

Don’t wait until a problem arises. Schedule preventive inspections and servicing now to beat the summer rush. Routine checkups can catch small issues before they become major disruptions.


Keep Your Fleet Ready with Action Supply

Your team counts on dependable equipment, and you can count on us. From fleet maintenance products to hydraulic hoses, fittings, and job site essentials, Action Supply is here to support your operation every mile of the way.

Need a custom solution or in-stock parts fast? Call us today or visit ActionSupplyInc.com to connect with our knowledgeable team.


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Contact Action Supply today to learn how we can help support your growing business with reliable supply solutions built for efficiency and scalability.