Check the camshaft sporcket, crankshaft sprocket, tensioner pulley, and idler pulley for abnormal wear, cracks, or damage.

Replace as necessary.

Inspect the tensioner pulley and the idler pulley for easy and smooth rotation and check for play or noise.

Replace as necessary.

Replace the pulley if there is a grease leak from its bearing.

Check the belt for oil or dust deposits. Replace, if necessary.

Small deposits should be wiped away with a dry cloth or paper. Do not clean with solvent.

When the engine is overhauled or belt tension adjusted, check the belt carefully. If any of the following flaws are evident, replace the belt with a new one.

Description	Flaw conditions
1. Hardened back surface ● Back surface is glossy, non-elastic and so hard that when your fingernail is pressed into it. no mark is produced.
2. Cracked back surface rubber
3. Cracked or separating canvas
4. Badly worn teeth (initial stages) ● Canvas on load side of tooth flank worn (Fluffy canvas fibers, rubber gone and color changed to white, and unclear canvas texture)
5. Badly worn teeth (last stage) ● Canvas on load side of tooth flank worn down and rubber exposed (tooth width reduced)
6. Cracked tooth bottom
7. Missing tooth
8. Side of belt badly worn note Normal belt shluld have precisely cut sides as if cut by a sharp knife.
9. Side of belt crackeda