To prevent interference with auxiliaries for an engine, to reduce effects of vibration of the engine and of heat radiated from the engine to a possible extent, and to facilitate air gap management.

This rotation take-out device is characterized in that a front swash plate pump and a rear swash plate pump, these being connected in series and driven by the engine, are mounted fore and aft of a common case, shafts of the two pumps projecting into the common case are coupled by means of a first gear, a PTO gear interlocked/coupled with the first gear is provided in a PTO case mounted on the common case, and a rotation sensor is provided on the PTO case in order to read changes in magnetic flux on the periphery of the PTO gear. Or, this rotation take-out device is characterized in that the front swash plate pump and the rear swash plate pump, these being connected in series and driven by the engine, are mounted fore and aft of the common case, shafts of the two pumps projecting into the common case are coupled by means of the first gear, and a rotation sensor is provided on the common case in order to read changes in magnetic flux on the periphery of the first gear.