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The timing belts must be checked closely. Should the following defects be evident, replace
the belt with a new one.
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1.Hardened back surface rubber. Glossy, non-elastic, and so hard that no mark is produced even when scratched by fingernails.
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2.Cracked back surface rubber. 3.Cracked or separated canvas. 4.Cracked tooth bottom. 5.Cracked side.
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6.Abnormal wear on side.
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Normal belt should have clear-cut sides as if cut by a sharp knife.
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7.Abnormal wear in teeth.
Initial stage: Canvas on load side tooth flank worn (Fluffy canvas fibers, rubber gone and color changed
to white, and unclear canvas texture) Last stage: Canvas on load side tooth flank worn down and rubber exposed (tooth width reduced)
8.Missing tooth.
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1.Check the auto-tensioner for leaks from the sealed sections. Replace it if leaky.
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2.Check the rod end for wear and other damage. Replace the auto-tensioner if the rod is badly worn or damaged.
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3.Measure the extension length of the rod. If it is not within the standard value range, replace the auto-tensioner. Standard value: 14.5 mm
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