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Transmission system

A transmission or gearbox is the gear and/or hydraulic system that transmits mechanical power from a prime mover (which can be an engine or electric motor), to some form of useful output device. Transmission is a speed reducing mechanism, equipped with several gears. The simplest transmissions, often called gearboxes,  provide gear reduction sometimes in conjunction with a right-angle change in direction of the shaft. It may be called a sequence of gears and shafts, through, which the engine power is transmitted to the tractor wheels. These are often used on PTO-powered agricultural equipments The complete path of power from the engine to the wheels is called power train.

Function of  transmission system:

  • To transmit power from the engine to the rear wheels of the tractor.

  • To make reduced speed available, to rear wheels of the tractor.

  • To alter the ratio of wheel speed and engine speed in order to suit be field conditions.

  • To transmit power through right angle drive, because the crankshaft and rear axle are normally at right angles to each other.

The power transmission system consists of:

(a) Clutch

(b) Transmission gears

(c) Differential

(d) Final drive 

(e) Rear axle       

(f) Rear wheels