Variable Precharge Accumulator for Agricultural Header

A harvesting header and feederhouse for use with a crop harvesting machine, the header and feederhouse comprising:

• a feederhouse interface at a distal end of the feederhouse;
• a header frame providing structural support for the harvesting header;
• a pivotable connection between the feederhouse interface and the header frame enabling the header frame to pivot with respect to the feederhouse interface.
• at least one hydraulic ram connected between the feederhouse interface and the header frame to pivot the harvesting header on the feederhouse;
• a hydraulic supply providing pressurized hydraulic fluid to the at least one hydraulic ram;
• and
• an accumulator assembly fluidically connected between the hydraulic supply and the at least one hydraulic ram, the accumulator assembly having a precharge fluid/gas interface between a gas chamber and the hydraulic supply, and a working fluid/gas interface between the gas chamber and the at least one hydraulic ram.