Abstract: A clutch assembly has a clearance between the piston and the clutch pack when the clutch is disengaged. This clearance is set and maintained by a one-way mechanism which establishes the limit of linear movement of the clutch piston during piston retraction or disengagement of the clutch.

Abstract: A power transmission has coaxially aligned input and output shafts. The shafts are interconnected by a multi-speed transmission and the output shaft is connected to a final drive mechanism through a pair of meshing gear members. A planetary reversing gear arrangement is connected between the input and output shafts for reversing the rotational direction from the input shaft prior to delivery to the final drive mechanism.

Abstract: A rotating machine has a splined primary shaft rotatably mounted in an opening of an oil-filled housing and a primary seal carried by the housing for sealing with a mating secondary splined shaft upon insertion of the secondary shaft into the housing opening for mating with the primary shaft. A retractable member is carried by the primary shaft for sealing with the primary seal to maintain the oil within the housing prior to the insertion of the secondary shaft and prevent the flow of oil to the spline. Upon insertion of the secondary shaft through the housing opening, the secondary shaft seals with the primary seal to prevent leakage from the housing. Furthermore, the secondary shaft forcibly retracts the retractable member away from the primary seal and establishes a flow path around the retractable member to the secondary shaft so that oil flows to the mating splines of the shafts.