UTILITY OPERATOR WAS ASSISTING TWO GARAGE MECHANICS MAKE ADJUSTMENTS ON THE DRAGLINE LIFT CABLE.HE WAS IN THE CAB AT THE CONTROLS, OPERATING LEVERS PER THE MECHANIC'S DIRECTIONS TO HELP ADJUST THE DRIVE CLUTCHES. THE SIDE WINDOW WAS OPEN TO BE ABLE TO SEE THE MECHANICS AND AS HE CAUSEDTHE CABLE TO JERK, DEBRIS FLEW INTO HIS LEFT EYE.