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The Complete Fleet Vehicle Maintenance Checklist for Safety (Trucks)

A fleet of Peterbilt trucks lined up in a row

Fleet managers: you know better than anyone else that managing a fleet of vehicles is about keeping it safe, cost-effective, and operable. Nevertheless, if you or your team lapse on completing your daily, weekly, or even monthly fleet vehicle maintenance checklist, you’re more likely to experience unplanned downtime, faulty components, and bottlenecks or delays. Nevertheless, […]

Transmission Overheating or Too Hot? Here’s What to Do

A person sitting in the driver's seat in a semi truck reviewing what appears to be a stack of papers on the driver's wheel

Engine overheating? It happens from time to time. Transmission overheating? Believe it or not, it can happen. When a diesel truck’s transmission temperature is too hot, you might notice the presence of strong burning odors, difficulty shifting gears, or potential transmission failure. The best way to recognize an overheating transmission is to familiarize yourself with […]

How to Bleed Air Out of Your Diesel Engine & Fuel System (Trucks)

A mechanic working on the inside of a semi-truck hood

Air coming into a diesel engine can cause serious problems. Diesel being prevented from reaching the fuel injectors is one such problem. “Bleeding” a diesel engine of its air is crucial to helping it start and stay powered up. But before you attempt to bleed air from the fuel system, you need to figure out how […]

How Often Should You Replace Transmission Fluid on a Diesel Truck?

A mechanic opening the hood of a large semi-truck and preparing for a truck engine rebuild

Coolant, motor oil, brake fluid, gear fluid, hydraulic fluid, and transmission fluid: these are just a small sample of the many fluids that keep trucks running. While most motor oil requires a change every few thousand miles, transmission fluid change intervals aren’t always as clear. How often should you replace transmission fluid, anyway? The answer […]

5 Reasons Why Your Steering Wheel Shakes at High Speeds

A driver looking at a clipboard in a semi truck front seat while auditing his fleet management strategies he's using for his truck operation

Picture this: you’re driving your rig down the highway at 65 miles per hour when your semi-truck’s steering wheel starts shaking. Oh, no, you might be thinking. I just replaced my engine. Why is my steering wheel shaking at high speeds now? If you’ve ever experienced the pain and fear of a shaking steering wheel, […]

How Often Should You Do a Diesel Oil Change (Diesel Trucks)?

A person standing and smiling in front of an open MAN semi-truck

Every 5,000 to 7,000 miles or 250 to 500 hours, depending on the truck: that’s how often you should change oil on a diesel truck. But the interval for a diesel truck oil change depends on several caveats, such as how long the vehicle is used, how large the vehicle is, and more. But the […]

Planned Preventive Maintenance vs. Regular Maintenance (Trucks)

Certified Fleet Services fleet of vehicles that are ready for planned preventive maintenance work

Fleet managers and operators: your trucks are one of your business’s most valuable assets. You’d best bet that conducting planned preventive maintenance is essential to keeping your business alive and profitable. The question is how planned preventive maintenance differs from regularly scheduled maintenance. And why is being proactive about both essential to the vitality of […]

What is a Diesel Particulate Filter (DPF) System on a Truck?

A frontal view of Certified Fleet Services mobile repair truck and trailer with other trucks in the background

Black smoke: unlikely to happen with your semi-truck, right? That’s all thanks to your DPF filter. You can thank your truck’s DPF filter for clean diesel fuel burns and a cleaner exhaust system. But what is a DPF on a truck, and why is it important? A diesel particulate filter system, also known as a […]

Truck Brake Repair: 6 Indicators You Need New Brakes (Or Repairs)

A driver looking at a clipboard in a semi truck front seat while auditing his fleet management strategies he's using for his truck operation

Your truck brakes are responding a little weird. I’ll get around to truck brake repairs eventually, you might think to yourself. Not so fast. While you might be tempted to hold off on completing a brake repair on your truck for a day when you have more time, lapsing on repairing your truck’s brakes could […]

What Is A Valve Cover Gasket (Replacements, Costs, and More)?

A driver looking at a clipboard in a semi truck front seat while auditing his fleet management strategies he's using for his truck operation

What happens when a valve cover gasket stops working? Not to mention, what is a valve cover gasket? Let’s backtrack. On a good day, an engine’s pistons move up and down at hyperspeed in the cylinder. Exhaust valves and gaskets open and close just as fast. They ensure that a constant supply of hot oil […]