EMPLOYEE WAS WORKING ON ADJUSTMENT IN THE HEIGHT OF THE SEAT IN THE KOMATSU LOADER. AS HE WAS MAKING THE ADJUSTMENT HIS RIGHT HAND SLIPPED OFF THE ADJUSTMENT KNOB. HE WAS BOUNCING IN THE SEAT ATTEMPTING TO GET THE RIGHT ADJUSTMENT. THE END OF HIS RIGHT MIDDLE FINGER ENTERED THE AREA OF THE SCISSOR MECHANISM AND WAS MASHED AS HE PLACED WEIGHT ON THE SEAT.