Step-by-Step Method for Adjusting the Chain Tension of Electric Hand Trucks:

Remove the flat fork guard plate

2. Loosen the nuts on the rear axle of both sides

3. Loosen the lock box fixing screws

4. Adjust the regulating nuts on both sides of the rear axle; ensure balance on both sides.

Section II: Chain Maintenance

Regularly inspect and adjust the tension of the chain, and check for any signs of the lock pins on the chain joints coming loose.

Regularly wipe and periodically add a small amount of oil for lubrication.

If the chain is too tight, adjust the tension by turning the tension nut counterclockwise as described above, and then slightly move the rear wheel forward.

4. Chain adjustment should be appropriate in tension, allowing for smooth operation. The chain spring should be mounted on the outer side, with the open end facing opposite the direction of motion. It must not come into contact with the chain cover or crank.

Three: Failing Maintenance

One possible cause is that the chain is too loose; please adjust the tension. Another reason is that the chain wheel, chain, and flywheel are not on the same plane; the repair method is as follows:

Remove the chain wheel cover to inspect for any deformation or wear on the chain wheel.

Please repair or replace the sprocket if the issue is caused by chain wheel problems.

3. Check if the flywheel and rear wheel are misaligned, and adjust if necessary.

4. Flywheel Wear: Replacement of Flywheel

5. Replace the chain if it is deformed or worn. Note that the opening direction of the chain links should be opposite to the direction of the chain's movement.