Abstract: An exemplary embodiment includes a method of operating a drivetrain. The drivetrain includes a PTO and a transmission having multiple speed ratios. The PTO includes a PTO output member and a PTO input member. The method includes monitoring a speed value representative of a rotational speed of a PTO component, comparing the speed value to a preselected PTO overspeed value, reducing the rotational speed of the PTO component, and overriding a manual command to increase the rotational speed of the PTO component above the preselected PTO overspeed value.

Abstract: An exemplary embodiment includes a method of operating a drivetrain. The drivetrain includes a PTO and a transmission having multiple speed ratios. The PTO includes a PTO output member and a PTO input member. The method includes monitoring a speed value representative of a rotational speed of a PTO component, comparing the speed value to a preselected PTO overspeed value, reducing the rotational speed of the PTO component, and overriding a manual command to increase the rotational speed of the PTO component above the preselected PTO overspeed value.

Abstract: A drive system is provided for coupling a clutch assembly with a pump assembly that provides fluid power to cool, lubricate and control the operation of the clutch. The drive system comprises a drive coupling rotatably supported on an input shaft by a plurality of bearing members. The bearing members permit the drive coupling to rotate independent of the rotation of the input shaft. The drive coupling is provided with at least two splined surfaces for engaging a corresponding splined surface on both the clutch assembly and the pump. The drive system counteracts radial loads generated within the pump and moment loads generated at the splined connections to prevent premature wear or damage to the pumping elements and mating components.