TRACTOR POWER-TAKEOFF ENGAGEMENT LIMIT

摘要

An interlock mechanism (50) for use on a tractor (10) to limit the engagement of the tractor power-takeoff (20) only when the tractor engine (15) is running at or below a predetermined speed of operation is disclosed wherein an interlock clip (50) interconnects the control levers (31 resp. 40) for the engine throttle (16) and the power-takeoff engagement control (20) such that the power-takeoff control lever (40) is locked against moving into an ON position whenever the throttle control lever (31) has been moved to a predetermined position. The clip (50) includes a first member (52) having a cam surface (53) thereon engageable with the throttle control lever (31) and a second member (54) movable into the path of movement of the PTO control lever (40) whenever the first member (52) is moved into a lockout position by the throttle control lever (31). The clip (50) also includes a spring (55) to permit yielding movement of the first and second members (52, 54) under conditions where the PTO control lever (40) is moved into the ON position and the throttle (16) is subsequently moved into the predetermined position.