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. TARO
2. LAND CRUISER (_J7_)
3. CAREVACA (_J7_)
4. LAND CRUISER PRADO (_J7_)
5. LAND CRUISER Hardtop (_J7_)
6. LAND CRUISER FRP Top (_J7_)
7. HILUX V Pickup (_N_, KZN1_, VZN1_)
8. PICKUP V Pickup (_N_, KZN1_, VZN1_)
9. TACOMA V Pickup (_N_, KZN1_, VZN1_)
10. HILUX MIGHTY X V Pickup (_N_, KZN1_, VZN1_)
11. HIACE IV Bus (_H1_)
12. REGIUS IV Bus (_H1_)
13. HIACE IV MPV (_H1_)
14. DYNA IV Bus (_H1_)
15. HIACE / COMMUTER IV Bus (_H1_)
16. QUANTUM IV Bus (_H1_)
17. HIACE IV Bus (__H1_, __H2_)
18. HIACE IV Van (_H1_)
19. LAND CRUISER PRADO (_J12_)
20. HILUX VI Pickup (_N1_)
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.