All as above, plus, with the c130-J engine as pictured above, in Hotel mode, for engine running offloads/onloads. it minimises the jetwash in such circumstances... we usually dont bother as it induces a bit of a wobble on the back end which is a bit of a norse with getting the forklift lined up... so we just "disk" (Ie engine not producing no fore/aft thrust using throttles in gorund/reverse mode) the engines, which does the same job. The Movers are not happy if they are getting buffeted around by propwash.
The J, designed by clever americans to be flown by very thick ones, does all the autofeathering automatically, your drills just put the handles in the positions that the automatics have done already... Fantastic stuff.
We have an unfeather/feather pump if things get so serious that we have to start pumping oil around to change configuration of the props or put prop in the Hotel mode above.