A DAYCO 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. PAJERO I Canvas Top (L04_G)
2. MONTERO � Canvas Top (L04_G)
3. PAJERO/SHOGUN Mk II Canvas Top (L04_G)
4. PAJERO/SHOGUN I Canvas Top (L04_G)
5. PAJERO I (L04_G, L14_G)
6. PAJERO I (L04_G, L14_G, NA, NB, NC, ND, NE, NF, NG)
7. MONTERO � (L04_G, L14_G)
8. PAJERO/SHOGUN � (L04_G, L14_G)
9. PAJERO/SHOGUN I (L04_G, L14_G)
10. L 300 III Bus (P0_W, P1_W, P2_W, P3_W)
11. STARWAGON III Bus (P0_W, P1_W, P2_W, SD, SE, SF, SG, SH, SJ,
12. DELICA III Bus (P0_W, P1_W, P2_W, P3_W)
13. PAJERO II Canvas Top (V2_W, V4_W)
14. MONTERO � Canvas Top (V2_W, V4_W)
15. PAJERO/SHOGUN � Canvas Top (V2_W, V4_W)
16. PAJERO/SHOGUN II Canvas Top (V2_W, V4_W)
17. SHOGUN II Canvas Top (V2_W, V4_W)
18. MONTERO II Canvas Top (V2_W, V4_W)
19. PAJERO II (V3_W, V2_W, V4_W)
20. PAJERO II (V3_W, V2_W, V4_W, NH, NJ, NK, NL)
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.