A TOPRAN 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. FOCUS II Turnier (DA_, FFS, DS)
2. FOCUS II Station Wagon (DA_, FFS, DS)
3. FOCUS II (DA_, HCP, DP)
4. C-MAX (DM2)
5. FIESTA V (JH_, JD_)
6. IKON V (JH_, JD_)
7. 206 Hatchback (2A/C)
8. C3 I (FC_, FN_)
9. 307 (3A/C)
10. FUSION (JU_)
11. 206 SW (2E/K)
12. 2 (DY)
13. DEMIO (DY)
14. C2 (JM_)
15. FOCUS C-MAX (DM2)
16. 3 Saloon (BK)
17. AXELA Saloon (BK)
18. 3 (BK)
19. AXELA (BK)
20. XSARA PICASSO (N68)
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.