Service Manual

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.

are any clean cuts that look like they were made with a

sharp knife, these are normal).

Figure 78

Crack

Cracks at

base of teeth

Side surface

crack

Figure 79

Corners are rounded

Abnormal wear (core is

frayed and is protruding)

6. Abnormal wear on side surface of belt (NOTE: If there

Liquid Cooled

Gas Engine

Figure 80

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

Canvas is worn away

and rubber exposed

Missing teeth

Figure 81

Make sure pulley turns freely and does not make abnor-

mal noises.

Workman 3000/4000 Series

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Liquid Cooled Gas Engine