Ocampo:
Ever since HSD developed (late 1930s) the Hydromatic design, counterweights has not been used on these props. Whereas earlier props balanced oil pressure against centrifugal counterweights in the hub, the Hydromatic used a double-acting hydraulic cylinder (see the illustration above) to position the blade angle. This permits both feathering and reversing functions to be employed.
I cannot say for sure about the Dash 8 prop, but I believe it's similar to the HSD prop on some Saab 340 models; it definitely has a flyweight governor in the PCU mounted coaxially with the prop shaft, on the aft side of the gearbox. A control shaft extends between the PCU and a servo valve inside the prop hub.
14RF-9 prop description