A FAST brand Tensioner Pulley, timing belt is a part of the timing belt drive, which serves to bypass the belt in a certain place or several places and is a freely rotating pulley of small diameter.

The composition of the roller is small: it is the roller mount, the internal rolling bearing with a protective oil seal, and the working body of the roller itself, which is in contact with the belt.

1. TRAFIC Bus (TXW)
2. 131 (131_)
3. SUPERBRAVO (131_)
4. ARGENTA (132_)
5. ARGENTA Saloon (132_)
6. DUCATO Panorama (280_)
7. DUCATO Bus (230_)
8. 131 Familiare/Panorama (131_)
9. DUCATO Van (230_)
10. DUCATO Van (280_)
11. DUCATO Panorama (290_)
12. DUCATO Platform/Chassis (290_)
13. TRAFIC Platform/Chassis (P6)
14. TRAFIC Rodeo (P6)
15. TRAFIC Van (TXX)
16. ARENA Combi (A97)
17. ARENA Van (TB, TF)
18. MASTER II Van (FD)
19. MASTER II Platform/Chassis (ED/HD/UD)
20. MOVANO Van (X70)
21. See more in applications

The principles of the timing belt tensioner work

Excessive tension leads to intensive wear of the timing parts - pulley bearings (water pump, generator, tensioner, etc.), the belt itself, and others. In addition, a tight belt stretches faster and shortens its service life. Too little preload is fraught with more serious problems - slipping of the belt along the toothed pulleys of the camshafts, which leads to a violation of the valve timing and deterioration of the entire engine.

Therefore, a tensioning device is introduced into the timing drive in the form of rollers of one design or another, which, during engine operation, maintain an optimal belt tension.