Input/output modules that are combined with any of the electronic controllers via CANbus communication extend the total input/output capacity of systems by eight to 16 I/O, depending on the module added. The modules can also be located remotely from the controller, providing additional application flexibility.
The Eaton 72400 is a servo-controlled, variable-displacement, piston-type pump displacing 2.48 in3/rev (40.6 cm3/rev) and operating at 3,500 psi (241 bar). At an average input speed of 1,900 rpm it produces 20 gpm (76 lpm) of flow to the front wheel motors.
The single hydrostatic pump is able to control both front wheels by using an FDC3 positraction flow divider cartridge. This valve allows for distribution of the pump flow with enough differential to make the tight turns required when spraying around obstacles or turning at the end of the field.
The auxiliary pump's primary output operates the fluid delivery pump for the sprayer. Excess fluid from the EFV2 is directed to a seven-section directional valve that operates the boom functions on the sprayer. The front-wheel-assist system is activated by a three-position switch in the cab that also selects the high- or low-speed operating range. Once engaged, system operation is completely automatic and transparent to the operator. "The hydraulic front-wheel-assist system works so well, I've been using it in dry field conditions, too," Bossuyt said. "I've noticed that with power to the front wheels, the engine is running cooler and doesn't seem to be working as hard."
The whole project took eight months to 10 months from start to finish. HyPower delivered the controller, pumps, valves, hose assemblies, and some other components as needed. All of the fabrication was completed in the farm workshop.