Abstract: A mobile machine such as a tractor has an engine and hydraulic supply system including a pump supply with a pump (MP) driven by the engine to provide a pressurized fluid at a pump supply pressure PSP. The hydraulic supply system has an electronic load sensing system (E-LS) to regulate the pump supply pressure. The E-LS is arranged to increase a stand-by pressure differential of the pump supply once the engine is determined to be running following start-up. This enables the hydraulic supply system to be configured with a reduced hydro-mechanically defined stand-by pressure differential so that it places a reduced load on the engine when it is started. The E-LS may be arranged to inhibit LS control of the pump supply when the engine is started, with LS functionality only commenced once the engine is running. Reduced load on the engine during start-up can improve cold starting.

Abstract: An assembly system for components of a pressurized fluid supply system for an agricultural vehicle includes a body having at least one fluid duct connectable at one end to a pressurized fluid supply and having a socket at the other end. A detachable component such as an accumulator or oil filter is connectable in releasable mechanical engagement with the body to receive pressurized fluid from the at least one fluid duct. The engagement results from insertion of at least a portion of the component into the socket and rotation of the component to a locked position. The body has at least one discharge duct extending therethrough. In a partially rotated position of the component portion within the socket, the component remains mechanically attached to the body and the fluid duct and discharge duct are in fluidic connection, discharging accumulated pressure in the fluid duct.

Abstract: An assembly system for components of a pressurized fluid supply system for an agricultural vehicle includes a body having at least one fluid duct connectable at one end to a pressurized fluid supply and having a socket at the other end. A detachable component such as an accumulator or oil filter is connectable in releasable mechanical engagement with the body to receive pressurized fluid from the at least one fluid duct. The engagement results from insertion of at least a portion of the component into the socket and rotation of the component to a locked position. The body has at least one discharge duct extending therethrough. In a partially rotated position of the component portion within the socket, the component remains mechanically attached to the body and the fluid duct and discharge duct are in fluidic connection, discharging accumulated pressure in the fluid duct.

Abstract: A method of manufacturing cracker roller discs comprises forming a disc blanks and machining to produce the final form. The disc blank has an axial bore through the centre, a first portion radially outward of the centre of substantially constant thickness, a second portion radially outward of the first portion which second portion tapers towards the periphery of the disc blank, and a plurality of upstanding ridges extending radially outward across the second portion on opposed faces of the disc. Machining, suitably by turning on a lathe, removes the top part of each ridge and leaves at least one sharp edge extending along it, with all ridges on a face being machined in a single operation.

Abstract: A pressurised fluid supply system for an agricultural vehicle (100) includes a main supply circuit (MC) including a variable displacement pump (RP) providing a first source of pressurised fluid to a steering system (SS) of the vehicle and to consumers (WH) connected with the vehicle. A steering supply circuit (SC) includes a fixed displacement pump (LHP) supplying pressurised fluid to the steering system (SS). A pilot pressure circuit (PPC), connectable to supply a second source of pressurised fluid to consumers connected with the vehicle, receives pressurised fluid from the main supply circuit (MC).