Patent ID: 7389641

Claim:
A system configured to drive a fan of an agricultural vehicular applicator, the fan mounted on a wheeled chassis assembly propelled via a drive train by an engine in a forward direction of travel, comprising: a hydraulic pump mechanically driven by the engine, the hydraulic pump connected to drive the fan in creating a pressurized air stream; and a stroke limiter mechanically connected to the hydraulic pump, wherein: when the engine slows to a threshold speed, the stroke limiter diverts a portion of a power demand by the hydraulic pump via the drive train to drive the wheeled chassis assembly; the stroke limiter mechanically limits a stroke of the hydraulic pump so as to limit a fluid output to drive the fan; the stroke limiter restricts the fluid output of the pump above a predetermined engine speed driving the hydraulic pump; and the predetermined engine speed to restrict the fluid output of the pump is greater than a minimum engine speed to drive the pump at a full pump speed.