A JP GROUP 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. FIESTA IV (JA_, JB_)
2. FIESTA Mk IV (JA_, JB_)
3. FIESTA Van (J5_, J3_)
4. COURIER Van (J5_, J3_)
5. FOCUS (DAW, DBW)
6. FOCUS Saloon (DFW)
7. FOCUS Turnier (DNW)
8. FOCUS Clipper (DNW)
9. FIESTA Van (JV_)
10. COURIER Van (JV_)
11. TOURNEO CONNECT
12. TRANSIT CONNECT
13. TRANSIT CONNECT (P65_, P70_, P80_)
14. FOCUS II (DA_, HCP, DP)
15. FOCUS II Turnier (DA_, FFS, DS)
16. FOCUS II Station Wagon (DA_, FFS, DS)
17. FOCUS C-MAX (DM2)
18. FOCUS II Saloon (DB_, FCH, DH)
19. GALAXY (WA6)
20. S-MAX (WA6)
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.