Onboard pump assembly for an agricultural system

An agricultural harvester comprising an onboard pump assembly, comprising:

• a bi-directional onboard pump configured to:
• supply a working fluid to an operational output from an onboard reservoir while operating in a first direction;
• and
• fill the onboard reservoir with the working fluid from a bulk reservoir while operating in a second direction, opposite the first direction;
• and
• a valve configured to:
• facilitate flow of the working fluid from the onboard reservoir to the operational output while the bi-directional onboard pump is operating in the first direction;
• and
• block flow of the working fluid from the operational output to the onboard reservoir while the bi-directional onboard pump is operating in the second direction.

An agricultural harvester, comprising:

• a row unit comprising:
• a rotor having a plurality of spindles;
• a central shaft, wherein the rotor is configured to rotate about the central shaft;
• and
• a bearing disposed between the rotor and the central shaft;
• and
• an onboard pump assembly comprising:
• an onboard pump configured to:
• supply a working fluid to an operational output from an onboard reservoir, wherein the operational output is fluidly coupled to the bearing;
• and
• fill the onboard reservoir with the working fluid from a bulk reservoir;
• and
• a valve assembly configured to transition between an operational state and a filling state;
• wherein the valve assembly, while in the operational state:
• establishes a first connection between the onboard reservoir and an input end of the onboard pump;
• establishes a second connection between the operational output and an output end of the onboard pump;
• and
• blocks the bulk reservoir;
• and
• wherein the valve assembly, while in the filling state:
• establishes a third connection between the bulk reservoir and the input end of the onboard pump;
• establishes a fourth connection between the onboard reservoir and the output end of the onboard pump;
• and
• blocks the operational output.