I find it a little hard to believe that they used a cable for the bucket tilt. I have never worked on a 2050, so I could be wrong. Usually the cable is used for the auxillary hydraulic or a parking brake. The tilt pedal usually has direct linkage to the valve. You certainly would not hurt anything by trying to lubricate the cable if that is what it is. If it does use a cable then it should not be hard to change and that would be the best option if it does use a cable for the bucket control, but I would take a look again and see if there is a linkage from the pedal back to the valve, probably under the seat.