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. RAPID Box Body/MPV (F40_, G40_)
2. EXPRESS Box Body/MPV (F40_, G40_)
3. EXTRA Van (F40_, G40_)
4. EXTRA Box Body/MPV (F40_, G40_)
5. CLIO I (B/C57_, 5/357_)
6. LUTECIA I (B/C57_, 5/357_)
7. 19 II (B/C53_)
8. 19 Mk II (B/C53_)
9. 19 II Chamade (L53_)
10. 19 Mk II Chamade (L53_)
11. MEGANE I (BA0/1_)
12. MEGANE I Coach (DA0/1_)
13. MEGANE I Coupe (DA0/1_)
14. MEGANE I Classic (LA0/1_)
15. TWINGO I (C06_)
16. MEGANE I Cabriolet (EA0/1_)
17. 19 I (B/C53_)
18. 19 � (B/C53_)
19. KANGOO (KC0/1_)
20. CLIO II (BB_, CB_)
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.