A DT Spare Parts 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 Platform/Chassis (280_)
8. DUCATO Van (290_)
9. DUCATO Bus (230_)
10. DUCATO Van (230_)
11. 131 Familiare/Panorama (131_)
12. DUCATO Van (280_)
13. DUCATO Panorama (290_)
14. DUCATO Platform/Chassis (290_)
15. TRAFIC Platform/Chassis (P6)
16. TRAFIC Rodeo (P6)
17. TRAFIC Van (TXX)
18. ARENA Combi (A97)
19. ARENA Van (TB, TF)
20. CROMA (154_)
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.