RVerDiane, I have the same issue. since you are on the road, just line the oval hole with duck tape, overlapping the edges of the bracket.
Others, the oval hole is through the bracket that is used to hook the tow bar up when in the storage mode. The cable goes through it from the car to the bell crank arm.
If your cable is chafing there, then something is likely misaligned. My cable makes no contact there, either at rest or with the brakes applied. Is your connection point at the toad centered and in line with the pivot points? Does the cable chafe at the top, bottom, or one side of the hole.
My brake cable recently wore off it's plastic shielding there as well (after about a year of towing). Since I'm not seeing any evidence of rust on the cable, I'm just considering it a minor cosmetic issue at this point.
I do think I'll try the tip about lining the oval hole with duct tape-- for those wanting to see a picture, here's a blog post I did last year on the full setup. Look at the "fully-extended arms" pic near the end of the post. The black J-shaped piece that the cable is going thru is what we're talking about).
Overall, after a year with my ReadyBrute Elite, I'm satisfied with it's performance and price value, but wish it'd been a bit more durable cosmetically. Besides the issue above, a few small surface rust spots have appeared on the towbar edges (where the silver paint has flaked off), and the red emergency brake cable lost it's "red" color within a matter of months due to inadequate UV protection. Minor quibbles, but hope NSA can fine-tune their finishing quality to eliminate them in the future.
If it is the verticle alignment, make sure you have the hitch attachment to the rv and the attachment to the car within 2 inches (if I recall correctly from the instructions). You can use a drop receiver hitch to get things aligned better.
Thanks for your input. Since I am on the road and will be through July at least, I need some temporary fixes for now. My hitch actually raises instead of drops and I believe that was due to the blue ox baseplate position on my Honda CRV.
How would I get this addressed on the road? I don't have the knowledge to do much but monitor the situation and put duct tape on the 'oval'.
lb311: I wish I had seen your step by step guide when I first got my equipment. So informative.