Toro Workman 3000 Series Service Manual page 89

Timing Belt Inspection
Inspect all sections of timing belt closely. Replace the
belt if any of the following conditions are found:
1. Hardening of rubber on rear surface (rear surface is
glossy, no mark is left when scratched and has no elas­
ticity).
2. Cracks in rubber on rear surface.
3. Cracked and peeling canvas.
4. Cracks at base of teeth.
5. Cracks in rear surface of belt.
6. Abnormal wear on side surface of belt (NOTE: If there
are any clean cuts that look like they were made with a
sharp knife, these are normal).
7. Abnormal tooth wear.
Initial period: Worn canvas (fraying, rubber missing,
whitish discoloration, indistinct canvas texture).
Later period: Canvas worn away and rubber ex­
posed (teeth become thin).
8. Missing teeth.
Belt Tensioner Inspection
Make sure pulley turns freely and does not make abnor­
mal noises.
Workman 3000/4000 Series
Cracks at
base of teeth
Abnormal wear (core is
frayed and is protruding)
Canvas is worn away
and rubber exposed
Page 3 – 51
Figure 78
Crack
Crack
Side surface
crack
Figure 79
Corners are rounded
Figure 80
Missing teeth
Figure 81
Liquid Cooled Gas Engine