Rangemaster Decoupled Drive / Sheared Coupling

Garbage disposal motor runs but the grinding plate does not move; no grinding action is observed.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Sheared internal drive coupling between motor shaft and impeller plate, stripped drive spline, manufacturing defect in coupling assembly

Safety first: Isolate power before inspection.

Confirm symptom: Look into the chamber while briefly switching the unit on (use extreme caution and keep hands clear). If the motor sound is present but the plate does not move, the drive is decoupled.
No user-serviceable coupling: On most Rangemaster disposals, the coupling between the motor and grinding plate is internal and not designed for field repair.
Replace unit: The safe and practical remedy is replacement of the disposal, as opening the sealed housing is not recommended.

Professional Required 5/5

Internal drive coupling (integral to motor/grinding assembly)

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