A: The causes and troubleshooting methods for generating heavy faults are as follows:
① If the lubricating oil is poor or insufficient, the lubricating oil should be added as required;
②Suspension or steering system connection parts are damaged, the suspension or steering system connection parts should be repaired as required, and replaced if necessary;
③ The front wheel is not positioned correctly, and the front wheel positioning angle should be adjusted;
④If the spring sinks and the spring should be replaced;
⑤If tire pressure is insufficient, It should provide sufficient tire pressure.