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Old 09-09-2020, 08:08 PM   #1
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Join Date: Sep 2020
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Black Tank Issues

I recently purchased a 2011 Forest River Cedar Creek Silverback 35QB 5th Wheel. The previous owner said he didnt back flush the black water before delivering the unit to me. After hooking up the water and plumbing waste lines i found that the black water pull leaver was stuck in the closed position. The previous owner told me to just use some WD40 kn it. It took all i had to pull the leaver out. I connected the fresh water hose to the black water flush inlet and it is obviously plugged. Pushing the leaver back in is just as difficult to push in as it was to pull out?? Can anyone tell me my options to flush and or fre up the sticky leaver?? I know, buyer beware! But Any suggestions are welcome!
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Old 09-09-2020, 09:05 PM   #2
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Location: Central New York
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There are RV valve lube products that may help. I use Thetford Drain Valve Lubricant after dumping the tanks. Both grey and black.

Try to get a penetrating oil like WD40 into the cable. A motorcycle cable lube tool might work...I've never tried. Some folks have drilled a hole into the valve housing to get lube into it. Fortunately I've never bad a valve stick bad enough to try this approach.

Worse case, disassemble, clean, lube, reassemble.
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Old 09-10-2020, 08:20 AM   #3
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As Legacy mentioned, it's most likely the cable that's stuck. The WD-40 suggestion is pretty good, but any penetrating lube should help. The good news is that you did get it to move so there is hope for it.

Put plenty of lube on it and operate it many times to distribute the lube.
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