Tractor 240hp Front PTO Electric Control

The function of a tractor's transmission system is to transmit the engine's power to the drive wheels, enabling the tractor to obtain the required driving speeds and traction, and to achieve the tractor's starting, stopping, and reversing; and to transmit power to the power take-off shaft to drive various agricultural machinery.

Based on the method of changing the transmission ratio, transmission systems can be divided into stepped and continuously variable transmissions. Based on the way energy is transmitted and transformed, they can be divided into mechanical, hydraulic, and electric transmissions. Mechanical transmissions are commonly used as stepped transmissions, while hydraulic and electric transmissions are continuously variable transmissions.

Wheeled tractor drivetrains typically consist of a clutch, gearbox, central drive, differential, final drive, and power take-off shaft. Tracked tractors usually have a coupling between the clutch and gearbox, and use a steering mechanism instead of a differential. Some wheeled and tracked tractors have an auxiliary reducer (creeper) or reverser (reverse gear) between the clutch and gearbox or between the gearbox and central drive. The auxiliary reducer may also be located on the side or front of the gearbox. Four-wheel drive tractors require a transfer case. Some transfer cases simply add a few gears to the gearbox, with power to the front axle taken from the gearbox output shaft via the transfer case. Some transfer cases are located on the left side of the gearbox, requiring universal joints at both ends of the driveshaft; others are located below the gearbox. If the driveshaft is positioned directly in the center, with its axis concentric with the front axle rocker shaft, a rigid coupling can be used. Walking tractors often use a transverse shaft gearbox, with belt transmission for the first stage of reduction and a dog clutch as the steering mechanism. The transmission system of a boat-type tractor is very similar to that of a hand-held tractor. The steering mechanism uses either a jaw clutch or a multi-plate steering clutch.