Crawford MU CDM9

The mechanical drive unit of the CDM9 operator — without the control electronics.

It is the motor + gearbox assembly that physically turns the torsion shaft of a sectional overhead door. This is the “muscle” of the CDM9 system, while the ECS‑series control box is the “brain.”

It’s supplied as a replacement part when the mechanical drive has failed but the control PCB is still good.