Internal Armature Rubbing Due to Bearing Misalignment

If the hub bearings are improperly adjusted or have developed significant play, the internal armature (the rotating component containing the magnets) may shift off-center. This physical displacement can cause the armature to rub against the stator coils, wearing down the protective insulation on the coil windings. Once the insulation is compromised, the metal-to-metal contact creates an internal short-circuit, preventing the generator from producing the necessary voltage for the lighting system.