Abstract: A drive system for an agricultural work vehicle. The drive system includes a front power takeoff device configured to extend from a front portion of the agricultural work vehicle and to be driven by an engine. The drive system also includes a first gearbox and a second gearbox positioned between the engine and the front power takeoff device. The first gearbox is configured to be driven by the engine and to provide power to drive the second gearbox. The second gearbox is configured to be driven by the first gearbox and to provide power to drive the front power takeoff device. The first gearbox and the second gearbox each provide a vertical shift between a respective driven input and a respective driving output.

Abstract: A drive system for an agricultural work vehicle. The drive system includes a front power takeoff device configured to extend from a front portion of the agricultural work vehicle and to be driven by an engine. The drive system also includes a first gearbox and a second gearbox positioned between the engine and the front power takeoff device. The first gearbox is configured to be driven by the engine and to provide power to drive the second gearbox. The second gearbox is configured to be driven by the first gearbox and to provide power to drive the front power takeoff device. The first gearbox and the second gearbox each provide a vertical shift between a respective driven input and a respective driving output.

Abstract: A clutch assembly for an agricultural work vehicle having a piston slidably disposed within a chamber having a first portion and a second portion. The piston is positionable between a first position and a second position in response to a fluid pressure within the first portion of the chamber to actuate a clutch mechanism. A sealing ring is associated with the piston to substantially prevent flow of fluid between the first portion and the second portion when the piston is in the first position. A bleed assembly is configured to permit flow of fluid between the first portion and the second portion when the piston is in the first position. The bleed assembly allows sufficient flow to substantially prevent unintentional engagement of the clutch mechanism.

Abstract: A clutch assembly for an agricultural work vehicle having a piston slidably disposed within a chamber having a first portion and a second portion. The piston is positionable between a first position and a second position in response to a fluid pressure within the first portion of the chamber to actuate a clutch mechanism. A sealing ring is associated with the piston to substantially prevent flow of fluid between the first portion and the second portion when the piston is in the first position. A bleed assembly is configured to permit flow of fluid between the first portion and the second portion when the piston is in the first position. The bleed assembly allows sufficient flow to substantially prevent unintentional engagement of the clutch mechanism.

Abstract: A multiple clutch control system for controlling the operation of clutches in a multiple speed transmission of the type wherein the gear ratio of the transmission is operated by engaging one hydraulically operated clutch while simultaneously disengaging another hydraulically operated clutch includes circuitry responsive to the hydraulic pressure applied to the just engaged or on going clutch for preventing the disengagement of the other clutch until the hydraulic pressure applied to the just engaged clutch exceeds a predetermined level indicating that the just engaged clutch has engaged.