Product Manual

Electric Drum Brake Trouble Shooting
Symptoms Possible Cause
Noise or brake chatter Improper brake adjustment.
Oil or grease on lining.
Improperly adjusted or worn wheel bearing.
Drum out of round.
Dirt on drum or magnet surface.
Dust in rivet holes.
Lining glazed or worn.
Scored drum.
Loose backing plate.
Weak or broken return springs.
Only one brake is activating Improper brake adjustment. (see brake adjustment)
Improperly adjusted or worn wheel bearing.
Drum out of round.
Loose backing plate.
Weak or broken shoe return spring.
Glazed or worn lining.
Loose lining.
Bad connection at tow vehicle.
Broken or disconnected wire.
Bad magnet.
Dirt or grease inside hub surface.
All brakes drag Faulty or improperly adjusted brake controller.
Improperly wired brake connection.
Mechanical resistance at actuator or shoes.
Brakes do not apply Faulty brake controller.
Improperly adjusted brake controller.
Brake wires not connected to tow vehicle.
Bad Magnets.
Improper brake adjustment.
Lining glazed or worn.
Dirt or grease inside hub surface.
Damaged wiring.