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Old 09-23-2020, 04:05 AM   #1
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Best way to keep valves working smoothly

One thing I have had on my trailers is the gray and black tank valves start out working smoothly when new but continually get more difficult to operate (push in and out).

Is it corrosion on the shaft? It it internal friction?

How do you keep the valves working?

Is there something I should lube during winterization ?
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Old 09-23-2020, 06:34 AM   #2
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I've never had one not work. I also don't wash chunks of food down the sink and I don't winterize them. Drain the tanks and there's nothing to winterize. You can get rebuild kits for them
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Old 09-23-2020, 06:43 AM   #3
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I spray mine with Silicone spray, if their cable operated, the outer lining over the cable can get corrosion. Spray both ends and the slide on the valve that's exposed.
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Old 09-23-2020, 02:08 PM   #4
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Some people have drilled and tapped the area where the shaft slides and then install a zerk fitting. Grease it annually. I carry a set of both sizes in case I need to replace. They are in an area that can build up solids on the round plates. Just replaced my daughters after 5 years. Replace when they first act up. It won’t get better
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Old 09-23-2020, 02:45 PM   #5
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I spray mine with WD40 every now and then which seems to work it's way down the length of the cable.
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Old 09-23-2020, 03:49 PM   #6
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If you don't have cables then its the seals along both side of the blade get dry. This makes the opening and closing difficult. I have more trouble with my gray valves than my black. I assume this because of the dish soap that goes into the gray tank eventually removes the lubricate. I take my valves out and apply silicon lubricate Dow 111 its a grease like and very difficult to clean off or wash off to the seals. I have thought about putting a grease zert and using a grease gun, but I am not sure if that would deteriorate the seals? Safe Travels.
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Old 09-23-2020, 03:50 PM   #7
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Years ago an RV engineer suggested that once a month I add about a quart of cheap mineral oil to each tank immediately after I dump and then allow it to sit for an hour to get that mineral oil on the valve blade before any water is introduced. I have done that through 12 years of fulltime and now another 8 years of part-time and have not had any valve problems.
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Old 09-24-2020, 04:36 AM   #8
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Quote:
Originally Posted by 09 harley View Post
Some people have drilled and tapped the area where the shaft slides and then install a zerk fitting. Grease it annually. I carry a set of both sizes in case I need to replace. They are in an area that can build up solids on the round plates. Just replaced my daughters after 5 years. Replace when they first act up. It won’t get better
I disagree. My daughters acted up much less after getting to be 5 years old.
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Old 09-24-2020, 03:44 PM   #9
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Don’t use WD-40. Ever. Use silicone spray or a plastic safe lubricant. WD-40 is not a lubricant. It will screw things up. For the cable. Try cable graphite. They sell it for motorcycles and atvs
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Old 09-24-2020, 06:15 PM   #10
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This may be a solution.

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Old 09-24-2020, 07:34 PM   #11
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Lots of good solutions posted above. Try anything in a pinch. Use what ever is available.

The gate valves with a short solid shaft are working through an open chamber. The shafts are supported at the outside end. Lubricate the shaft when the valve is open with plumbers white faucet grease.

The gates work against seals and can have significant friction. Again use plumber grease. Rub it on both sides or on the outside face and the inside seals when gate is open. Rubber gloves are appropriate.

I wish you good luck and happy trails ahead!
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Old 09-24-2020, 07:44 PM   #12
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I disagree. My daughters acted up much less after getting to be 5 years old.
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