Waste valve cable sheath loose
While trying to lubricate a hard to operate gray water waste valve cable and moving the handle back and forth, the cable sheath broke loose from the bracket holding it. Now the whole assembly, sheath and its inside cable, moves together. Hence, the valve is now open and I cannot close it.
With some difficulty I can reach the attachment point, but it does not seem to be replaceable. So, does anyone have any suggestions on how to proceed? Also, how does one lubricate such a valve and cable?
Thanks for any suggestions!