A HERTH+BUSS JAKOPARTS 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. L 300 III Bus (P0_W, P1_W, P2_W, P3_W)
2. STARWAGON III Bus (P0_W, P1_W, P2_W, SD, SE, SF, SG, SH, SJ,
3. DELICA III Bus (P0_W, P1_W, P2_W, P3_W)
4. SPACE WAGON (N3_W, N4_W)
5. NIMBUS (N3_W, N4_W, UF)
6. EXPO (N3_W, N4_W)
7. CHARIOT (N3_W, N4_W)
8. GALANT V Saloon (E5_A, E7_A, E8_A)
9. GALANT Mk V Saloon (E5_A, E7_A, E8_A)
10. ETERNA V Saloon (E5_A, E7_A, E8_A)
11. GALANT V (E5_A, E7_A, E8_A)
12. GALANT V (E5_A, E7_A, E8_A, HJ)
13. GALANT Mk V (E5_A, E7_A, E8_A)
14. L400 Bus (PD_W, PC_W, PA_V, PB_V, PA_W)
15. ECLIPSE II (D3_A)
16. ECLIPSE Mk II (D3_A)
17. GALANT VI (EA_)
18. GALANT VI Saloon (EA_)
19. GALANT / ASPIRE Mk VI (EA_)
20. ASPIRE VI (EA_)
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.