Abstract: A cooler box for an agricultural harvester includes: a frame including an opening; a screen held in the opening and including a plurality of screen apertures defining a screen aperture size; a cooling fan configured to produce an airstream that flows through a front of the screen; a wand assembly including a wand associated with the screen and a blower coupled to the wand, the wand assembly being configured to vacuum accumulated debris from the screen; and a debris guard covering the front of the screen and including a plurality of guard openings defining a guard opening size that is greater than the screen aperture size.

Abstract: A cooler box for an agricultural harvester includes: a frame including an opening; a screen held in the opening and including a plurality of screen apertures defining a screen aperture size; a cooling fan configured to produce an airstream that flows through a front of the screen; a wand assembly including a wand associated with the screen and a blower coupled to the wand, the wand assembly being configured to vacuum accumulated debris from the screen; and a debris guard covering the front of the screen and including a plurality of guard openings defining a guard opening size that is greater than the screen aperture size.

Abstract: An Agricultural vehicle has a frame supported by a front pair of wheels and a back pair of wheels, wherein the back pair of wheels are steerable and wherein each wheel of the back pair of wheels is connected to the frame via a respective intermediate support element that is pivotable with respect to the frame in such a manner that the back pair of wheels are movable between a first position wherein the back pair of wheels defines a first track width and are positioned at a first distance from the front pair of wheels, and a second position wherein the back pair of wheels defines a second track width and are positioned at a second distance from the front pair of wheels, wherein the first track width is larger than the second track width and wherein the first distance is smaller than the second distance.

Abstract: A steering system for a work vehicle includes a steering hand pump, a hydraulic main supply line fluidly coupled with the steering hand pump and including a check valve, and a normally open, two position valve. The valve includes an inlet fluidly couplable with a pressurized access point of a hydraulic sub-system, an outlet fluidly coupled with the main supply line on a downstream side of the check valve, and a pilot port fluidly coupled with the main supply line on an upstream side of the check valve. The valve is operable in the closed position based on pressure in the main supply line when the main supply line is pressurized from a pressure source, and operable in the open position and interconnecting the pressurized access point with the main supply line through the outlet when the main supply line is not pressurized from the pressure source.

Abstract: An Agricultural vehicle has a frame supported by a front pair of wheels and a back pair of wheels, wherein the back pair of wheels are steerable and wherein each wheel of the back pair of wheels is connected to the frame via a respective intermediate support element that is pivotable with respect to the frame in such a manner that the back pair of wheels are movable between a first position wherein the back pair of wheels defines a first track width and are positioned at a first distance from the front pair of wheels, and a second position wherein the back pair of wheels defines a second track width and are positioned at a second distance from the front pair of wheels, wherein the first track width is larger than the second track width and wherein the first distance is smaller than the second distance.

Abstract: A steering system for a work vehicle includes a steering hand pump, a hydraulic main supply line fluidly coupled with the steering hand pump and including a check valve, and a normally open, two position valve. The valve includes an inlet fluidly couplable with a pressurized access point of a hydraulic sub-system, an outlet fluidly coupled with the main supply line on a downstream side of the check valve, and a pilot port fluidly coupled with the main supply line on an upstream side of the check valve. The valve is operable in the closed position based on pressure in the main supply line when the main supply line is pressurized from a pressure source, and operable in the open position and interconnecting the pressurized access point with the main supply line through the outlet when the main supply line is not pressurized from the pressure source.

Abstract: Disclosed is a modulating hydraulic circuit for controlling a clutch such as the clutch on a power takeoff (PTO) shaft. The circuit includes a throttling valve having (a) an inlet port for receiving hydraulic fluid from a source, and (b) a discharge port connected to the clutch. The discharge port is also connected to an accumulator which is at an accumulator pressure. The discharge port and the clutch are at a pressure generally proportional to the accumulator pressure. As accumlator pressure rises at a controlled rate, the clutch is progressively engaged. Optionally, the circuit includes a brake control valve for "softly" disengaging a PTO shaft brake as the accumulator pressure rises. A method for controlling the clutch includes flowing hydraulic fluid through hydraulic lines to a throttling valve connected to an accumulator and to the clutch, increasing pressure in the lines and progressively engaging the clutch.

Abstract: A bypass valve includes a valve body containing a spring loaded valve member. The valve body includes first and second interconnected bores respectively connected to the outlet and inlet of a fluid pump feeding a fluid function. A valve member slidably disposed in the valve bores includes a cylindrical portion and a frusto-conical portion cooperating with the first and second bores to provide a predetermined pressure drop across both portions at a first flow rate with cold fluid and at a second flow rate with hot fluid. The spring is set so as to allow fluid to bypass from the pump outlet to the inlet until the predetermined pressure drop is exceeded.