A OPTIMAL 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. LOGAN Pickup (US_)
2. LOGAN (LS_)
3. SANDERO
4. LOGAN MCV (KS_)
5. LOGAN EXPRESS (FS_)
6. SANDERO/STEPWAY I (BS_)
7. SOLENZA (B41_)
8. KANGOO / GRAND KANGOO (KW0/1_)
9. KANGOO (KW0/1_)
10. KANGOO Express (FW0/1_)
11. KANGOO Rapid (FW0/1_)
12. LOGAN I (LS_)
13. TONDAR 90 I (LS_)
14. LOGAN I Estate (KS_)
15. TONDAR 90 I Estate (KS_)
16. LODGY (JS_)
17. LARGUS Estate Van (KS0_, RS0_, KSA_)
18. DOKKER MPV (KE_)
19. DOKKER Express Box Body/MPV
20. LARGUS Van (FS0_, FSA_)
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.