Toro Groundsmaster 455-D Service Manual page 56

Timing Belt Installation
IMPORTANT: Never install a used belt. When the
timing belt is removed a NEW timing belt must be
installed.
1. Install the new timing belt, with the runs taut, in the
following order (Fig. 46):
Crankshaft gear (Item 13)
Fixed roller (Item 11)
Injection pump gear (Item B)
Camshaft gear (Item C)
Tensioner roller (Item 17)
Coolant pump gear (Item 10).
2. Loosen the bolt (Fig. 47, Item 18) and nut (Item 19)
to release the tensioner roller. DO NOT use Item A to
set tension. Tension on belt is only to be set by the spring
(Fig. 46, Item 15) when tensioner plate is free to rotate.
3. Re-tighten the bolt (Item 18), then the nut (Item 19),
when the belt is tensioned.
Engine
Page 3 - 38 Rev. B
C
Figure 46
A
Figure 47
Groundsmaster 455-D
A
B