Toro Groundsmaster 455-D Service Manual page 55

7. Loosen the nut (Fig. 45, Item 8) and the bolt (Item 9),
securing the roller tensioner bracket (Item 10).
8. Rotate the roller tensioner bracket square (Item A) to
compress the spring (Item 11).
A
9. Re-tighten the bolt (Item 9).
10. Remove the timing belt.
Figure 45
Page 3 - 37 Rev. B
Groundsmaster 455-D Engine