Drive for auxiliaries

Fig 1: Illustration For Steps 1-4

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Belt circuit with and without A/C compressor 

1. Generator
2. Belt tensioner
3. A/C compressor
4. Crankshaft pulley

The engine has a belt circuit that drives the A/C compressor and generator.

The belt circuit has an automatic and self-adjusting belt tensioner for simpler service and long life. The belt tensioner comprises a powerful spring that affects the belt tension via a pulley. The belt is multigroove type.