Abstract: A two-speed power-take-off drive for a tractor is disclosed which includes an assembly for sensing and indicating the PTO shaft speed to an operator in the tractor cab. The speed of the PTO shaft is a function of which end thereof is inserted into the drive sleeve, which determines the extent of its penetration into the drive sleeve. A speed indicator arrangement is provided which includes a sensing rod whose movement is controlled by the extent of penetration of the PTO shaft into the drive sleeve. The sensing rod is operative to activate or inactivate an electrical switch. The electrical input condition of the switch serves as an input to the tractor instrument cluster in the tractor cab to indicate the selected PTO shaft speed.

Abstract: A shift control system for a material handling implement including a transmission having a plurality of selectively electrically-operated hydraulic clutches is disclosed. The system includes a manually positionable gear selector which provides electrical signals respectively corresponding to actuation of the transmission's hydraulic clutches. Notably, the system includes acceleration sensing means arranged to sense acceleration of the implement along its longitudinal axis, with the acceleration sensing means operatively connected with the electrical controls which interface the gear selector and the electro-hydraulic valves which operate the hydraulic clutches. By this system, acceleration on the implement, either negative or positive, created during upshifting of the transmission is monitored, and the sequential operation of the hydraulic clutches for the next-requested shift automatically adjusted responsively to the sensed acceleration for facilitating smooth shifting of the transmission.