Just a suggestion also to go to the steering system manufacturer's website for overall lubrication and maintenance instructions of all the components in the steering chain. For instance, if the "cable" you are referring to is wire rope, then the wire as well is likely to be on the list of lubrication items. The individual strands in the wire rope rub against each other with friction as they bend around the sheaves and quadrant. With time, the friction causes the strands to break and fray. Lubrication along the entire length of the wire will greatly extend the life. Also the instructions should specify the recommended lubrication type for each item. Just a thought.