I was approached through the website www.popupportal.com to explain how I had repaired the springs on the lift arms of the camper.  Like the person who asked the question, I was hesitant to rip into it.  I purchased four new springs and cables. I felt that if messed up, I could buy four new complete arms.  What I found was that there isn't any real magic going on inside the arm.   The repair is fairly straight forward.  I wish I had taken pictures when I was repairing the arms. When I purchased the cable and the springs, the supplier also provided me special sized rivets and brass wheel that the cable is lopped through  and passes over.  I didn't ask for these, but the supplier knew how important they would be and included them in the kit. Rivet #1 is the large rivet below the safety spring pin in the picture below.  It holds the brass groved wheel that the cable runs in. The cable enters the slot in the arm and runs in the grove of the brass wheel. This free rolling