Working in a aircraft maintenance shop, we would get this problem on occasion. After wiping the exterior of the cable,our method was to disconnect at the engine end, whatever was being controlled. Sometimes this end would require a fitting to be removed from the cable at the attachment end. Using an oil squirt can, with penetrating fluid (we used Mouse Milk penetrating fluid) in it, squirt the fluid into the cable from the engine end. With a small orificed pressure hose gun pointed at the engine end of the cable (hold this union in a rag), pressure force the penetrating fluid into the cable. Wipe the (clean) cable exterior with what will be a fluid soaked rag. Using small strokes of the knob ( Not letting the disconnected core cable end into the cable exterior housing) should free up the core in the cable. I hope you are able to save the original cable. Jeff S.
Posted on Feb 2, 2012, 1:45 AM from IP address 126.96.36.199