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. 508 I (8D_)
2. 508 SW I (8E_)
3. SCUDO Van (270_, 272_)
4. SCUDO Bus (270_, 272_)
5. SCUDO MPV (270_, 272_)
6. MONDEO IV Turnier (BA7)
7. MONDEO IV (BA7)
8. GALAXY (WA6)
9. S-MAX (WA6)
10. EXPERT TEPEE (VF3X_)
11. FOCUS II Turnier (DA_, FFS, DS)
12. FOCUS II Station Wagon (DA_, FFS, DS)
13. FOCUS II (DA_, HCP, DP)
14. FOCUS C-MAX (DM2)
15. C-MAX (DM2)
16. SCUDO Platform/Chassis (270_, 272_)
17. PHEDRA (179_)
18. ULYSSE (179_)
19. 307 (3A/C)
20. 407 (6D_)
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.