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. L200 / TRITON (KA_T, KB_T)
2. TRITON Pickup (KA_T, ML, MN, KB_T)
3. L200 TRITON (KA_T, KB_T)
4. L200 (KA_T, KB_T)
5. HUNTER (KA_T, KB_T)
6. TRITON (KA_T, KB_T)
7. L200 / STORM (KA_T, KB_T)
8. STRADA (KA_T, KB_T)
9. PAJERO SPORT II (KH_, KG_)
10. CHALLENGER II (KH_, KG_, PB, PC)
11. MONTERO SPORT II (KH_, KG_)
12. NATIVA II (KH_, KG_)
13. MONTERO SPORT II SUV (KH_, KG_)
14. L200 / TRITON Platform/Chassis (KA_T, KB_T)
15. TRITON Platform/Chassis (MN, ML, KA_T, KB_T)
16. L200 TRITON Platform/Chassis (KA_T, KB_T)
17. TRITON Platform/Chassis (KA_T, KB_T)
18. 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.