1. Turn off the power, remove the protective cover, and loosen the motor assembly bolts. Move the motor so that the belt is loose enough to remove it without prying it open. Never pry the belt off.

2. Remove the old belt and check for abnormal wear, which may mean a problem in the design or maintenance of the transmission.

3. Choose a suitable belt replacement.

4. To clean the belt and pulley, wipe them with a rag dipped in a small amount of non-volatile liquid. The belt must be kept dry before installation and use.

5. Check the pulley for abnormal wear or cracks. If the wear is excessive, the pulley must be replaced.

6. Check whether the pulley is straight and symmetrical. The straight symmetry of the pulleys is crucial to the operation of the drive belt, especially the timing belt drive.

7. Check the remaining transmission components, such as the symmetry, durability and lubrication of the bearings and bushings.

8. Install the new belt on the pulley, never pry or use excessive force.

9. Tighten the center distance of the transmission device until the tension measuring instrument detects that the belt tension is appropriate. Turn the driving wheel several times by hand and retest the tension.

10. Tighten the motor assembly bolts, correct the torque, and ensure that all transmission components are tightened.

11. Start the device and observe the belt performance, check for abnormal vibration, and listen carefully for abnormal noise.

Category	Timing Belt pulley - D-type Hole	With/Without Flange	With
Material	Aluminum Alloy	Surface Finished	Natural Anodizing

Timing Belt Pulley - D-Hole S3M 3.0/S5M 5.0