1. Tractor:
- The tractor is the front part of the vehicle that houses the engine, transmission, and driver's cab.
2. Trailer:
- The trailer is the part that carries the load. It can be a dry van, refrigerated unit, flatbed, tanker, or other specialized types.
3. Fifth Wheel:
- The fifth wheel is a coupling mechanism that connects the tractor to the trailer. It allows the trailer to pivot while the tractor steers.
4. Landing Gear:
- The landing gear are supports that are used to stabilize the trailer when it is disconnected from the tractor.
5. Air Brakes:
- Tractor-trailers are equipped with air brakes, which use compressed air to apply pressure on brake pads or discs.
6. Suspension System:
- The suspension system absorbs shocks and vibrations caused by the road surface and helps to maintain stability.
7. Drive Train:
- The drive train consists of the transmission, driveshaft, and axles. It transfers power from the engine to the wheels.
8. Exhaust System:
- The exhaust system removes harmful gases and noise produced by the engine.
9. Electrical System:
- The electrical system includes batteries, alternators, starters, and various electrical components that provide power to the vehicle's lights, instruments, and other electrical devices.
10. Safety Equipment:
- Tractor-trailers are equipped with safety features such as mirrors, turn signals, brake lights, reflectors, and emergency equipment to ensure safety while driving.
