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. C4 GRAND PICASSO II (DA_, DE_)
2. B-MAX (JK)
3. FIESTA VI (CB1, CCN)
4. C4 PICASSO II
5. FIESTA VI Van
6. 308 II (LB_, LP_, LW_, LH_, L3_)
7. DS5
8. DS3
9. 308 SW II (LC_, LJ_, LR_, LX_, L4_)
10. TRANSIT COURIER B460 MPV
11. TRANSIT COURIER B460 Box Body/MPV
12. TOURNEO COURIER B460 MPV
13. 208 I (CA_, CC_)
14. DS3 Convertible
15. FOCUS III
16. FOCUS III Turnier
17. 3008 MPV (0U_)
18. C4 CACTUS
19. 5008 (0U_, 0E_)
20. FOCUS III Saloon
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.