An agricultural vehicle comprising a chassis carrying a bale chamber, the bale chamber comprising: a plurality of movable density doors (210A, 210B, 210C); at least one fluid cylinder (220A, 220B) comprising a fluid chamber (322A, 322B), a piston (323A, 323B) disposed in the fluid chamber (322A, 322B) to separate the fluid chamber (322A, 322B) into a piston side (324A, 324B) and a rod side (325A, 325B), and a cylinder rod (221A, 221B) coupled to the piston (323A, 323B) on the rod side (325A, 325B) and configured to move at least one of the density doors (210A, 210B, 210C); and a fluid supply circuit fluidly coupled to the fluid chamber (322A, 322B) and configured to supply working fluid to the fluid chamber (322A, 322B); the at least one fluid cylinder (220A, 220B) further comprises a piston fluid port (326A, 326B) that fluidly couples the piston side (324A, 324B) of the fluid chamber (322A, 322B) to the fluid supply circuit and a rod fluid port (327A, 327B) that fluidly couples the rod side (325A, 325B) of the fluid chamber (322A, 322B) to the fluid supply circuit; and the fluid supply circuit further comprises a fluid supply controller that is selectively switchable to a first fluid supply mode and a second fluid supply mode, the fluid supply circuit being configured to supply working fluid to only the piston side (324A, 324B) of the fluid chamber (322A, 322B) when the fluid supply controller is in the first fluid supply mode; and characterized in that the fluid supply circuit being configured to supply working fluid to both the piston side (324A, 324B) and the rod side (325A, 325B) of the fluid chamber (322A, 322B) when the fluid supply controller is in the second fluid supply mode. a plurality of movable density doors (210A, 210B, 210C); at least one fluid cylinder (220A, 220B) comprising a fluid chamber (322A, 322B), a piston (323A, 323B) disposed in the fluid chamber (322A, 322B) to separate the fluid chamber (322A, 322B) into a piston side (324A, 324B) and a rod side (325A, 325B), and a cylinder rod (221A, 221B) coupled to the piston (323A, 323B) on the rod side (325A, 325B) and configured to move at least one of the density doors (210A, 210B, 210C); and a fluid supply circuit fluidly coupled to the fluid chamber (322A, 322B) and configured to supply working fluid to the fluid chamber (322A, 322B); the at least one fluid cylinder (220A, 220B) further comprises a piston fluid port (326A, 326B) that fluidly couples the piston side (324A, 324B) of the fluid chamber (322A, 322B) to the fluid supply circuit and a rod fluid port (327A, 327B) that fluidly couples the rod side (325A, 325B) of the fluid chamber (322A, 322B) to the fluid supply circuit; and the fluid supply circuit further comprises a fluid supply controller that is selectively switchable to a first fluid supply mode and a second fluid supply mode, the fluid supply circuit being configured to supply working fluid to only the piston side (324A, 324B) of the fluid chamber (322A, 322B) when the fluid supply controller is in the first fluid supply mode; and characterized in that the fluid supply circuit being configured to supply working fluid to both the piston side (324A, 324B) and the rod side (325A, 325B) of the fluid chamber (322A, 322B) when the fluid supply controller is in the second fluid supply mode.