A TOPRAN 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. BRAVO II (198_)
2. RITMO III (198_)
3. DOBLO MPV (263_)
4. DOBLO Kombi (263_)
5. DOBLO Combi (263_)
6. DOBLO Cargo (263_)
7. MITO (955_)
8. GIULIETTA (940_)
9. PUNTO (176_)
10. DOBLO Platform/Chassis (263_)
11. PRATICO Platform/Chassis (263_)
12. MUSA (350_)
13. BRAVA (182_)
14. BRAVO I (182_)
15. COMBO Mk III (D) Box Body/MPV (X12)
16. PUNTO (188_)
17. COMBO Box Body/MPV (X12)
18. COMBO Tour (X12)
19. DELTA III (844_)
20. MAREA (185_)
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.