Examine the Motor: Refer to the photo above to see the motor with its gear removed. Notably, in this instance, the gear slipped off effortlessly because it was cracked as shown in the photo.

Assess Gear Condition: If the gear isn't cracked but just loose, follow the next steps to secure it properly.

Clean the Components: Thoroughly clean both the gear and the shaft to ensure there is no dirt, grease, or debris that could affect the adhesion.

Apply Adhesive: Place a drop of superglue on the shaft where the gear sits. Ensure you use a small amount to avoid excess glue seeping out.

Reattach the Gear: Carefully place the gear back onto the shaft, aligning it properly. Press gently to ensure it sits securely in place.

Allow to Set: Give the superglue some time to dry and set fully before proceeding with any further reassembly or use of the motor.