A SWAG 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. 3 Saloon (BL)
2. AXELA Saloon (BL)
3. 3 (BL)
4. AXELA (BL)
5. 3 SPORT (BL)
6. FIESTA VI Van
7. FOCUS II Turnier (DA_, FFS, DS)
8. FOCUS II Station Wagon (DA_, FFS, DS)
9. FOCUS II (DA_, HCP, DP)
10. C-MAX (DM2)
11. PARTNER Platform/Chassis
12. 206 Van
13. FIESTA V (JH_, JD_)
14. IKON V (JH_, JD_)
15. 206 Hatchback (2A/C)
16. C3 I (FC_, FN_)
17. 307 (3A/C)
18. FUSION (JU_)
19. 206 SW (2E/K)
20. 2 (DY)
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.