A DT Spare Parts 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. SCUDO Bus (220_)
2. 206 Hatchback (2A/C)
3. XSARA (N1)
4. XSARA Break (N2)
5. XSARA Estate (N2)
6. BERLINGO / BERLINGO FIRST MPV (MF_, GJK_, GFK_)
7. BERLINGO MPV (MF_, GJK_, GFK_)
8. SCUDO Van (220_)
9. 306 Hatchback (7A, 7C, N3, N5)
10. 306 Break (7E, N3, N5)
11. 306 (7B, N3, N5)
12. 306 Saloon (7B, N3, N5)
13. JUMPY (U6U_)
14. DISPATCH (U6U_)
15. PARTNER MPV (5_, G_)
16. PARTNER ESCAPADE MPV (5_, G_)
17. PARTNER (5_, G_)
18. RANCH MPV (5_, G_)
19. GRAND RAID MPV (5_, G_)
20. PARTNER PATAGONICA / URBANA MPV (5_, G_)
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.