System for supplying hydraulic fluid to aggregates on spindles or the like

In a transmission, a combination comprising a housing;

• three parallel hollow shafts rotatably mounted in said housing and including an input shaft, an output shaft and a third shaft, said shafts being equally spaced from each other and from a central axis;
• means for rotating said input shaft;
• a plurality of gears on each of said shafts, said gears forming a plurality of gear trains for rotating said output shaft at a selected one of several speeds and each of said gear trains including a first gear on one of said shafts and a second gear rotatable on another of said shafts, there being at least two second gears on each of said shafts;
• a plurality of hydraulic clutches, one for each of said second gears;
• and control means for selectively actuating said clutches to thereby couple the respective second gears to the associated shafts and to rotate said output shaft in response to rotation of said input shaft on actuation of several clutches to thus achieve an acceleration of said output shaft to a selected speed, said control means including valves mounted in said shafts and having valve members movable axially of the respective shafts, each of said valve members having a portion extending from the respective shaft, displacing means cooperating with said portions of said valve members and means for operating said displacing means to move said valve members axially of the respective shafts.