Hi Steve

On a Herc, prop pitch is controlled via the throttles only. As you increase the throttles the torque increase along wiht fuel flow to keep the engines running at 100%.

Condition levers only put the engine and prop in the required condition for the selection. Ie:

Feather will feather the prop and cut fuel flow.

Move the condition lever to "air start". The prop unfeathers and fuel flow is started along with the igniters to start the engine. (Only works in flight)

All power management is through the throttles only.  

Hope this helps

Dax