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Old 07-05-2013, 09:42 AM   #1
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Join Date: Oct 2004
Location: Texas
Posts: 1,508
Found an ez way to lubricate the cable for remote operated holding tank valves, especially the 3" black tank valve. I unscrewed the T handle and then threaded a short length of 1/2 " ID plastic tubing over the threads of the mounting base. Poured in a small amount of 3-in-1 oil and let it sit for about 5 min. Gravity did the rest and all the oil flowed down the cable. Repeated a couple more times and no more oil would flow down the cable. I used maybe 1 to 2 fluid ounces of oil.

Then decided to force more oil down the cable using an air compressor and air nozzle with minimal PSI. This was a mistake as it forced oil out the valve end of the cable and left a small puddle on the garage floor (I had the fabric underbelly open under the valve).

If this doesn't improve a stiff cable, then the problem is not in the cable, but the internal gate valve instead.

Larry Day

Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
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Old 07-05-2013, 11:32 AM   #2
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Join Date: Sep 2012
Location: Rockport, TX
Posts: 413
We have the same issue. I'm 230 and 5' 11" and it's all I can do to open the black valve. Interested to see if oiling the cable cures the problem.


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Old 07-05-2013, 12:13 PM   #3
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Location: WI.
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I have made it a habit, every time I pull one of those handles open, I spray a good shot of WD-40 down them.

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