A HUTCHINSON 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. JUMPY Van (BS_, BT_, BY_, BZ_)
2. DISPATCH Van (BS_, BT_, BY_, BZ_)
3. 607 (9D, 9U)
4. 607 Saloon (9D, 9U)
5. 406 Coupe (8C)
6. C5 I (DC_)
7. C5 I Break (DE_)
8. C5 I Estate (DE_)
9. BOXER Bus (244, Z_)
10. JUMPER Bus (244, Z_)
11. RELAY Bus (244, Z_)
12. 807 (EB_)
13. C8 (EA_, EB_)
14. BOXER Platform/Chassis (244)
15. BOXER Van (244)
16. JUMPER Van (244)
17. RELAY Van (244)
18. JUMPER Platform/Chassis (244)
19. RELAY Platform/Chassis (244)
20. EXPERT Van (222)
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.