| 摘要 |
The present invention provides a lubrication system and method for a work vehicle having a lubricant reservoir and a lubricant using attachment that comprises a single bi-directional pump/motor set, a single three-position/four way control valve that directs hydraulic fluid, through one of two flow limiting devices, to the hydraulic motor to power the pump. In one mode the pump, at a slow rate of approximately one gallon per minute, moves lubricant from the reservoir to the attachment. In the other mode the pump, at a fast rate of approximately six gallons per minute, moves lubricant from a lubricant source to fill the lubricant reservoir. The flow limiting devices can be either a fixed flow rate device or a multiple flow rate device as selected by an operator of the work vehicle. The various positions of the control valve can be actuated by a solenoid, a hydraulic cylinder, a pneumatic cylinder or a cable, all of which can be operated from the cab of the work vehicle.
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