Farm Power & Machinery

Functions of power transmission system

The main functions of the power transmission system are:
• 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 the 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 clutch, transmission gears, differential, final drive, rear axle and rear wheels as shown in Fig. 7.1. Combination of all these components are responsible for transmission of power from crankshaft to the rear wheels. These components are explained in the following sections.
  
  Fig. 7.1 Power transmission system