Abstract: A hydraulic lift device for an attaching device of a tractor which has a hydraulic pressure supply device and a hydraulic tank, comprising for each of two lower steering arms, a double acting hydraulic cylinder having a cylinder housing, a piston rod, a piston with a piston-end piston area and a piston rod-end piston area, as well as a piston-end cylinder chamber and a piston rod-end cylinder chamber. The device further comprises a first switching valve, which has at least three switching positions and four ports. The first port represents a connection to the pressure supply device. The second port represents the connection to the hydraulic tank. The third port represents the connection to the piston-end cylinder chamber of the first hydraulic cylinder and the fourth port represents the connection to the piston rod-end cylinder chamber of the second hydraulic chamber.

Abstract: The invention relates to a hydraulic lift device for an attaching device of a tractor which has a hydraulic pressure supply device and a hydraulic tank, comprising for each of two lower steering arms, a double acting hydraulic cylinder having a cylinder housing, a piston rod, a piston with a piston-end piston area and a piston rod-end piston area, as well as a piston-end cylinder chamber and a piston rod-end cylinder chamber. The device further comprises a first switching valve, which has at least three switching positions and four ports. The first port represents a connection to the pressure supply device. The second port represents the connection to the hydraulic tank. The third port represents the connection to the piston-end cylinder chamber of the first hydraulic cylinder and the fourth port represents the connection to the piston rod-end cylinder chamber of the second hydraulic chamber.

Abstract: An assembly with a lower steering arm has a strut 1 and an attaching end 16. To achieve a cost-effective design while at the same time reducing the play between the attaching end 16 and the end of the strut 1 received therein, the attaching end 16 includes a base member 18 and a cover 19. A blocking pawl 34 is supported in the base member 18. The cover 19 is welded to the base member 18 and comprises a stop face 30 for the end face 10 of the strut 1. Thus, any tolerances in the region of the base member 18 provided in the form of a forging do not affect the position of the stop face 30. The latter can be aligned when connecting the base member 18 and the cover 19. Because of its setting contour, the actuating lever 43 can be used for both the right hand and the left hand lower steering arm.

Abstract: An assembly with a lower steering arm has a strut 1 and an attaching end 16. The attaching end 16 includes a base member 18 and a cover 19. A blocking pawl 34 is supported in the base member 18. The cover 19 is welded to the base member 18. The cover 19 includes a stop face 30 for the end face 10 of the strut 1. Thus, any tolerances in the region of the base member 18 provided in the form of a forging do not affect the position of the stop face 30. The latter can be aligned when connecting the base member 18 and the cover 19. Because of its setting contour, an actuating lever 43 can be used for both the right hand and the left hand lower steering arm.

Abstract: A method of producing a welded assembly comprising two members and wherein the assembly is adapted subsequently to have an element connected thereto in a manner that imparts a connection force to the welded connection between the two members and the method comprising the steps of, prior to welding the two members together, temporarily applying a force to at least one of the two members to simulate the force which is to be imparted to the welded connection between the two members as a result of the connection of the further element to the assembly, welding the two members together to form the assembly while maintaining the predetermined force on the at least one member and subsequently removing the predetermined force from the at least one member.

Abstract: A manually adjustable wheel for a vehicle e.g.

Abstract: The spacer (2) is for use in spacing a disc from attachment portions of the rim of the wheel. The spacer comprises two spacing portions (4,6) and a rigid joining portion (22) retaining the spacing portions at a constant distance and orientation with respect to each other. The spacing portions (4,6) each have a bolt-receiving passage (24) and bearing surfaces (8,10) extending around the mouths of the passage. The bearing surfaces (8,10) of each spacing portion are in parallel planes which are the same planes for both spacing portions.