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Old 03-02-2019, 12:16 PM   #15
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Alan, not yet I haven't tried lubricating it yet. Just brought it home on Tuesday. I to have silicone spray lubricant that I could spray down in it in the next few days. Didn't think about using anything like that last year when I discovered the problem.
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Old 03-02-2019, 06:13 PM   #16
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Some of the silicone sprays have a petroleum base. Petroleum products could be harmful to the seal on the toilet flapper and also harmful to the seal on the waste tank dump valve.

Another thing you might check; toilet paper and other debris can build up in the groove and prevent the toilet valve from completely closing.

Thetford makes a tool to clean the groove the flapper slides in It is Thetford part number 33011. It is a bent long shank flat screwdriver that has been ground flatter than a normal screwdriver so it will fit into the groove. I made myself one out of an old worn out screwdriver I already had.
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Old 03-02-2019, 06:55 PM   #17
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Alan, I will look at the can I have and see if it is petroleum based. As for the special tool, I like the idea of the old screwdriver bet 90 degrees. I don't have a long shank one like that but I do have one that was about 6" long before someone bent it 90 degrees and it has a fairly thin blade. It's thin enough I was able to use it to rebuild the tranny on TW back at Thanksgiving. I also have a bunch of old wire hangers that I could probably use to make a groove hook out of, courtesy of the dry cleaners after our house fire a year ago.
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Old 03-02-2019, 06:59 PM   #18
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Alan, Also I like that TW of yours. Mine is an '89 GMC 1500 with a 5.7 out of a '93 Caddy Fleetwood.
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Old 03-02-2019, 08:13 PM   #19
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Quote:
Originally Posted by SlvrTwinkie View Post
Alan, I will look at the can I have and see if it is petroleum based. As for the special tool, I like the idea of the old screwdriver bet 90 degrees. I don't have a long shank one like that but I do have one that was about 6" long before someone bent it 90 degrees and it has a fairly thin blade. It's thin enough I was able to use it to rebuild the tranny on TW back at Thanksgiving. I also have a bunch of old wire hangers that I could probably use to make a groove hook out of, courtesy of the dry cleaners after our house fire a year ago.
The bent end of the screwdriver needs to be at least 2 or 3 inches long in order to reach the flapper pivot point where the debris will collect. There is an instruction sheet with the tool that shows the point the tool should be inserted and the direction the tool needs to rotate to remove the debris.

https://www.thetford.com/wp-content/...crewdriver.pdf

If you cut a clothes hanger, smooth the edges so that it does not cut/damage the seal.

Don't drop the tool! It is not easy to get back out of the tank. (experience )

ps:
When I said to not use "petroleum" based silicone, I should have said "solvent" based. I think most silicone sprays and/or greases will have some petroleum products included. Silicone that includes a solvent that will harm neoprene, polyethylene, PVC, or ABS is the thing to avoid.
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