TIMING BELT INSPECTION


TIMING BELT
The timing belts must be checked closely. Should the following defects be evident, replace the belt with a new one.

1.Hardened back surface rubber.
Glossy, non-elastic, and so hard that no mark is produced even when scratched by fingernails.

2.Cracked back surface rubber.
3.Cracked or separated canvas.
4.Cracked tooth bottom.
5.Cracked side.

6.Abnormal wear on side.
note Normal belt should have clear-cut sides as if cut by a sharp knife.

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.

TENSIONER PULLEY / IDLER PULLEY

Turn the pulley. If it does not rotate smoothly, or develops noise or excessive play, replace the pulley.

AUTO-TENSIONER

1.Check the auto-tensioner for leaks from the sealed sections.
Replace it if leaky.
2.Check the rod end for wear and other damage.
Replace the auto-tensioner if the rod is badly worn or damaged.
3.Measure the extension length of the rod.
If it is not within the standard value range, replace the auto-tensioner.
Standard value: 11.7 - 12.3 mm

4.Press the rod with a force of 98 to 196 N and measure the amount of retraction. If the measurement exceeds the standard value, replace the auto-tensioner.
Standard value: 1.0 mm or less