Abstract: A baler for making parallelepiped bales is equipped with a bale ejector or thrower structure including a bale throwing pan supported by a four-bar linkage that is swung upwardly by a hydraulic throwing cylinder. A control valve structure including a solenoid-operated trip valve and a solenoid-operated pressure-relief valve is actuated for effecting pressurization of the throwing cylinder and throwing of a bale in response to a trip switch being closed in response to a trip pedal being rotated by a bale moving rearwardly on the throwing pan as it exits the baler bale chamber, the trip valve when actuated blocking a source of fluid pressure from normal communication with a fluid sump, and the pressure-relief valve when actuated being operable for maintaining the working fluid pressure at a value determined by a variable potentiometer connected in circuit with the solenoid of the pressure relief valve.

Abstract: A forage harvester includes a feed roll assembly for feeding a mat of crop across a fixed shear bar located adjacent a rotating cutterhead for cooperating with the cutterhead knives to cut the mat of crop into lengths. The feed roll assembly includes front and rear lower feed rolls mounted in opposition to and for being contra-rotated relative to front and rear upper feed rolls. The upper feed rolls are carried by a downwardly biased link assembly that is pivotally mounted for permitting the upper feed rolls to move up and down relative to the lower feed rolls in response to varying amounts of crop passing between the lower and upper pairs of feed rolls. A metal detector is mounted within the lower front feed roll and normally operates to a generate a balanced field which extends into the crop feed zone above the lower front feed roll.