A device for actuating a reciprocating recovery apparatus for recovery of underground fluid. The actuating device has a centrally aligned input component, that transversely receives an output component through a central aperture, and is engaged with a driving mechanism. Torque is increased about the central output component as a series of axially aligned, but centrally offset, lobes push a corresponding driver disc around the central output at reduced velocity and increased torque. Each driver disc moves in eccentric fashion, yet remains engaged with a corresponding, centrally aligned take off member, each of which is further in combination with the central output component.