Merrill Motor with Oil Damping System
These pictures are from a Merill QC Signature Series III tunrtable. Some later models of this table came with the motor submerged in an oil bath.
I am not sure whether the motor is a modified Hurst or not. A special Merrill tube of oil came with it for submerging the bottom of the motor.
As you can see, the bottom “cap” of the motor is removed.
On the underside, you can see how the power is run. On the top, the wiring is threaded through the green tube.
Not sure of the physics behind this, but this particular unit has one of the most quiet motors of the Merrill models I have heard.