#$%^&*AU2019204107A120200102.pdf#####ABSTRACT OF THE DISCLOSURE A header for an agricultural harvester comprising first and second drive arm assemblies for connecting to respective cutting assemblies, and a drive unit consisting essentially of a hydraulic motor operatively connected to the first and second drive arm assemblies. Operation of the drive unit results in substantially linear and opposed oscillating motion of the cutting assemblies.1/7 'In C UCD