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A new humming, growling, or grinding sound near a wheel can be easy to dismiss at first. A driver may also notice vibration, unusual wheel-end heat, looseness, changing tire wear, or a difference in how the truck handles. Common bad wheel bearing symptoms can include...

The California BIT (Biennial Inspection of Terminals) inspection checklist outlines the mandatory safety and maintenance requirements for commercial motor vehicle fleets operating within the state. This comprehensive guide helps diesel truck operators ensure...

The forklift starts and may still drive normally, but the forks will not rise, lift much more slowly than usual, stop partway, or struggle when carrying a load. A forklift not lifting can be frustrating because the engine or drive system may appear to work normally...

Two trucks can show similar mileage and still have very different operating histories. One may spend most of its time at highway speed, while another idles for long periods, makes frequent stops, works at jobsites, or runs PTO equipment while stationary. That is why...

Your truck still starts and runs, but acceleration feels weaker, pulling power drops, RPM may be limited, or road speed becomes restricted. Dashboard warnings may appear at the same time. These are common signs that the truck may have entered an engine derate...

The engine starts and seems to run normally, but the equipment will not move forward, reverse, or in either direction. If heavy equipment starts and the engine runs but the machine will not move, the problem may involve the transmission, parking brake, hydraulic...

A low-air warning appears, the pressure gauge drops unexpectedly, or your truck suddenly takes longer than usual to build air. You may also hear a recurring hissing sound or notice that pressure does not remain stable. These symptoms can point to an air brake leak,...

When the temperature gauge climbs above normal, a warning appears, or your truck is running hot, something deserves attention. Truck overheating can happen during normal driving, while towing or hauling, on long grades, at highway speeds, during heavy jobsite work, or...

A diesel engine that is hard to start is different from a truck that will not start at all. In this situation, the engine eventually starts, but it takes longer than normal, needs several attempts, cranks slowly, or starts inconsistently. A hard-starting diesel engine...

Knowing how to tell if a hydraulic cylinder is bad can help you catch equipment problems before they turn into downtime, lost power, or bigger hydraulic system issues. In many cases, the warning signs show up early, such as hydraulic fluid leaking from the cylinder,...

A BIT inspection helps confirm that commercial trucks in California are being maintained safely and supported by the right records. When a truck runs into trouble during this review, the cause is usually a mechanical problem, incomplete documentation, unresolved...

Can bad alignment cause vibration in a truck? Yes, it can. Poor alignment can contribute to highway-speed vibration, especially when it causes uneven tire wear or puts extra stress on steering and suspension parts. Still, alignment is only one possible cause. If a...

When a truck won't start, the cause is not always obvious right away. It could be something simple, like a weak battery or loose connection, or it could point to a larger diesel, electrical, starter, or fuel-related problem. For truck owners, drivers, dispatchers, and...

Preventive maintenance for trucks can help reduce DOT inspection problems by catching worn, damaged, or unsafe components before they are found during an inspection. It does not guarantee a truck will never have a violation, but it can lower risk, improve safety, and...

A hydraulic hose leak happens when hydraulic fluid escapes from a hose, fitting, connection point, or another damaged part of the system. On heavy equipment, even a small leak can reduce pressure, slow performance, and create bigger problems if it is ignored....

Does oil brand matter in a diesel truck? Yes, but usually not as much as using the correct oil type, viscosity, and manufacturer specification. A well-known name can be a sign of consistent quality, but the label on the bottle should never matter more than what your...

A BIT inspection is a commercial vehicle inspection process connected to California’s Basic Inspection of Terminals program. For fleet managers, dispatchers, maintenance coordinators, and owner-operators, the goal is simple: keep trucks safe, documented, and ready for...

Hydraulic hose repair is often possible when the issue is minor, localized, and does not weaken the hose itself. But if the hose is cracked, bulging, leaking through the body, or damaged near a fitting, hydraulic hose replacement is usually the safer choice. For heavy...