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. GALANT III (E1_A)
2. GALANT III Saloon (E1_A)
3. SIGMA III (E1_A)
4. GALANT Mk III (E1_A)
5. ETERNA III (E1_A)
6. SAPPORO III (E16A)
7. SAPPORO Mk III (E16A)
8. STARION (A18_A)
9. STARION (A18_A, JA, JB, JD)
10. SPACE WAGON (D0_V/W)
11. NIMBUS (D0_V/W, UA, UB, UC)
12. CHARIOT (D0_V/W)
13. L 300 III Van (P0_V, P1_V, P_2V)
14. EXPRESS III Van (SF, SG, SH, SJ, WA, P0_V, P1_V, P_2V)
15. DELICA III Van (P0_V, P1_V, P_2V)
16. L 300 III Bus (P0_W, P1_W, P2_W, P3_W)
17. STARWAGON III Bus (P0_W, P1_W, P2_W, SD, SE, SF, SG, SH, SJ,
18. DELICA III Bus (P0_W, P1_W, P2_W, P3_W)
19. SONATA II (Y-2)
20. SONATA � (Y-2)
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.