A tractor's drive system, also known as a drive train, is a key component of agricultural machinery that transmits power from the engine to the drive wheels, enabling the tractor to move. It consists of several basic components that work together to ensure efficient and reliable operation. These are the main components of the tractor drive system:

• Engine: This is the power source that generates the mechanical energy necessary to drive the tractor. Tractor engines are usually diesel, which provides high power and torque.
• Gearbox: The gearbox that changes the rotational speed and torque transmitted from the engine to the wheels. Transmissions may be manual, automatic or semi-automatic, and may have different numbers of gears to adapt speed and power to different operating conditions.
• Clutch: An element connecting and disconnecting the engine from the gearbox, enabling smooth starting, changing gears and stopping the tractor without turning off the engine.
• Driveshaft: Transfers torque from the engine (or gearbox) to the drive axle.
• Drive axle: The component that distributes torque to the individual drive wheels. It contains differentials that allow the wheels to rotate at different speeds, which is necessary when turning.
• Propshafts and bevel gears: In all-wheel drive (4x4) drive systems, they transmit power to the front axle.
• Differentials: They allow you to vary the rotational speeds of the drive axle wheels, which is especially important when turning to avoid skidding and tire wear.
• Half-axles: Components that transmit torque from the differential to the wheels.
• Drive wheels: The final component of the drive system that contacts the ground and transmits the driving force to the ground.

The tractor's drive system must be robust and reliable to meet the demands of various terrain conditions and agricultural tasks. Ensuring proper lubrication, regular inspections and maintenance of these components is crucial to ensuring the long life and efficiency of the tractor.