Truck Components

Learn what a drive axle is on a semi truck, how it works, why it’s important, and how it affects traction, hauling, and commercial driving.

Learn what a steer axle is on a semi truck, how it works, why it’s important, and what CDL drivers should inspect before every trip.

Learn what a catwalk is on a semi truck, what it’s used for, why drivers use it, and how to stay safe while working behind the cab.

Learn what a PTO is in trucking, how a power take-off works, what trucks use it, and why it’s essential for dump trucks and other commercial equipment.

Learn what a tandem axle is, how it works on semi trucks and trailers, why it matters, and how it affects weight distribution, safety, and DOT compliance.

Learn what a pigtail is on a semi truck, what it does, why it’s important, and how to inspect it before every trip.