A self-setting valve assembly for a power steering gear assembly includes a plug, a first plunger, a second plunger, and a biasing member. The plug extends between a first end and a second end. The plug defines a cavity that is disposed between the first end and the second end, a first bore that extends from the first end to the cavity, and a second bore that extends from the second end to the cavity. The first plunger has a first head that is disposed within the cavity and a first stem that extends from the first head through the first bore. The second plunger has a second head that is disposed within the cavity and a second stem that extends from the first head through the second bore. The biasing member is disposed within the bore and extending between the first head and the second head.

A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (P) connected to a main flow path (2) and a tank port (T) connected to a tank flow path (3), a working port arrangement having a left working port (L) connected to a left working flow path (4) and a right working port (R) connected to a right working flow path (5), a bridge arrangement (7) of variable orifices having a first left orifice (A2L) connected to the main flow path (2) and to the left working flow path (4), a first right orifice (A2R) connected to the main flow path (2) and to the right working flow path (5), a second left orifice (A3L) connected to the left working flow path (4) and to the tank flow path (3), and a second right orifice (A3R) connected to the right working flow path (5) and to the tank flow path (3). Such a hydraulic steering unit should not have a self-alignment but a comfortable feeling for the driver. To this end a variable diagonal orifice A11_12 1 a variable diagonal orifice (A11_12) is connected to the main flow path (2) and to the tank flow path (3), wherein the orifices of the bridge arrangement (7) are closed in neutral position and the diagonal orifice (A11_12) is open in neutral position.

A plunger assembly for a power steering system comprises a plunger and a tappet. The plunger is disposed within and longitudinally movable along a plunger passageway in a housing of the power steering system. The tappet is disposed within and longitudinally movable along a port defined by the housing. The port is disposed at an angle with respect to the plunger passageway within the housing. The port communicates with the plunger passageway and an area exterior of the power steering system. A power steering system and method of setting the same are also disclosed.

A self-setting valve assembly for a power steering gear assembly includes a plug, a first plunger, a second plunger, and a biasing member. The plug extends between a first end and a second end. The plug defines a cavity that is disposed between the first end and the second end, a first bore that extends from the first end to the cavity, and a second bore that extends from the second end to the cavity. The first plunger has a first head that is disposed within the cavity and a first stem that extends from the first head through the first bore. The second plunger has a second head that is disposed within the cavity and a second stem that extends from the first head through the second bore. The biasing member is disposed within the bore and extending between the first head and the second head.

A machine is disclosed. The machine may comprise a steering device configured to move along a steering position range in response to a force applied on the steering device by a machine operator. The steering device may have at least one soft stop position along the steering position range. The machine may further comprise a biasing member mechanically coupled to the steering device and configured to apply an opposing force that opposes movement of the steering device when the steering device is at or beyond the soft stop position. A magnitude of the opposing force may be sufficiently low such that the machine operator can move the steering device past the soft stop position. The machine may further comprise an electronic control device configured to determine the soft stop position based on one or more operation conditions of the machine.

A steering gear includes a housing defining a chamber. A piston divides the chamber into first and second chamber portions. The piston is moveable along a linear axis relative to the housing upon pressurization of fluid in one of the first and second chamber portions. A pressure relief vents pressurized fluid from one of the first and second chamber portions to one other of the first and second chamber portions upon movement of the piston to a predetermined position. The pressure relief assembly includes a first valve at a first end of the pressure relief assembly and a second valve at a second end of the pressure relief assembly. The pressure relief assembly is axially movable relative to the piston to adjust the position of the first valve and the second valve relative to the piston.

A mobile crane drive assembly axle includes mutually independent suspensions of wheel carriers arranged on both sides of the drive assembly frame of the mobile crane. The suspensions each include at least one transverse control arm which couples the wheel carrier onto the drive assembly frame and is connected to the drive assembly frame such that it can be rotated about an axis which extends substantially parallel to the longitudinal axis of the drive assembly frame.

The disclosure relates to a steering system useful for providing stable control during rear axle steering of harvesters, such as self-propelled windrowers. The steering system utilizes a single steering cylinder and retracted caster cylinders to regulate rotation of the casters during rear axle road operation mode. The steering system locks the steering cylinder and uses the caster cylinders for damping during in-field operation mode.

A steering gear includes a housing defining a chamber. A piston divides the chamber into first and second chamber portions. The piston is moveable along a linear axis relative to the housing upon pressurization of fluid in one of the first and second chamber portions. A pressure relief vents pressurized fluid from one of the first and second chamber portions to one other of the first and second chamber portions upon movement of the piston to a predetermined position. The pressure relief assembly includes a first valve at a first end of the pressure relief assembly and a second valve at a second end of the pressure relief assembly. The pressure relief assembly is axially movable relative to the piston to adjust the position of the first valve and the second valve relative to the piston.

The disclosure relates to a steering system useful for providing stable control during rear axle steering of harvesters, such as self-propelled windrowers. The steering system utilizes a single steering cylinder and retracted caster cylinders to regulate rotation of the casters during rear axle road operation mode. The steering system locks the steering cylinder and uses the caster cylinders for damping during in-field operation mode.