A HERTH+BUSS JAKOPARTS 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. MEGANE III Grandtour (KZ0/1)
2. GRAN TOUR III Grandtour (KZ0/1)
3. MEGANE III Hatchback (BZ0/1_, B3_)
4. KANGOO Express (FC0/1_)
5. KANGOO Rapid (FC0/1_)
6. KUBISTAR Van (X76)
7. MODUS / GRAND MODUS (F/JP0_)
8. TWINGO II (CN0_)
9. DUSTER (HS_)
10. CUBE (Z12)
11. SCENIC III (JZ0/1_)
12. GRAND SCENIC III (JZ0/1_)
13. SANDERO
14. LOGAN (LS_)
15. LOGAN MCV (KS_)
16. CLIO III Hatchback Van (SB_, SR_)
17. LOGAN EXPRESS (FS_)
18. LOGAN Pickup (US_)
19. KANGOO BE BOP (KW0/1_)
20. LOGAN I (LS_)
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.