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09-05-2012, 03:44 AM
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#1
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Junior Member
Join Date: Oct 2010
Posts: 4
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Black Tank Valve Failure
The last time I tried to empty my black tank the gate valve broke. The shaft moves but it apparently is no longer attached to the knife valve. I have a new valve but my problem is that the tank is near full. HELP!!!
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09-05-2012, 05:07 AM
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#2
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Senior Member
Entegra Owners Club
Join Date: Dec 2008
Location: Chattanooga, TN
Posts: 907
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Ugh...that's gonna be a mess. The only thing I can think of would be to get a septic service to see if they can get a hose down the toilet to pump it out. Even if that works it's going to be a mess changing that valve.
Good luck.
__________________
2012 Entegra Aspire
2012 Nissan Xterra Pro4x Tow
Ready Brute Elite
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09-05-2012, 05:35 AM
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#3
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,886
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Try screwing the shaft into the blade. Maybe, just maybe it will catch on the edge of the blade and allow you to open it. Can you see the blade on the old valve, or is it way up in the piping? If you can see it, can you drill a hole on the blade and another one in the housing allowing you to attach a wire so you can pull the blade open after the stinky slinky is reattached?
Look at the new one and see if there is any way to partially demolish the old one to allow access to the blade so you can use pliers to grab the blade.
Maybe you can drill a hole opposite the pull shaft side and push the blade open?
No doubt all of these possible solutions will be messy, some more than others. I would also use coachmanrvr idea of the honey wagon. Good luck on this problem for sure.
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Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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09-05-2012, 06:57 AM
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#4
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Senior Member
Newmar Owners Club
Join Date: Dec 2007
Posts: 2,027
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gjenner:
Are you able to pull on the handle and pull out the shaft leading to the blade??? If so, might it make sense to remove the handle and shaft, then, using a long drill bit of a diameter less than the origiinal shaft you pulled out, insert the drill bit into the shaft channel until it comes up against the closed blade and drill carefully (trying to keep drill tip in middle of unseen blade) into that blade just enough to make a starter hole for some kind of threaded rod or long screw that might be able to get a good purchase on that blade. If ya can get such a threaded device into the tapped hole, and of course after hooking up your sewer hose, ya might just be able to pull open that blade. Just an idea.
Steve
__________________
2014 Newmar 3103 BAYSTAR/Triton V10 w. Banks/05 Honda Element toad
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09-05-2012, 02:38 PM
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#5
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,886
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Quote:
Originally Posted by Chickadee
gjenner:
Are you able to pull on the handle and pull out the shaft leading to the blade??? If so, might it make sense to remove the handle and shaft, then, using a long drill bit of a diameter less than the origiinal shaft you pulled out, insert the drill bit into the shaft channel until it comes up against the closed blade and drill carefully (trying to keep drill tip in middle of unseen blade) into that blade just enough to make a starter hole for some kind of threaded rod or long screw that might be able to get a good purchase on that blade. If ya can get such a threaded device into the tapped hole, and of course after hooking up your sewer hose, ya might just be able to pull open that blade. Just an idea.
Steve
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Not a bad idea Steve. Building on Steve's idea, you could use an Use an Easy Out Screw Extractor ( NEW 12 pc Rigid Screw Extractor Set Easy Out Tools Set on eBay! ) . It has the course threads that may bite into the plastic better.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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09-05-2012, 03:27 PM
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#6
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 23,922
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I would try the above with a long wood screw of the same diameter and see if you can screw it into the blade.
If not you can do this. The valve has a square box like structure where the shaft (the one that came off) inserts through the end of that square box. This box is where the blade slides back into when open. Take a dremel or saw and saw off the end of the box (the end with the hole where the shaft goes in) and this will give you access to the blade that you can now pull open with some needle nose pliers. Don't forget, the valve assembly can be rotated to make it easier to saw the end off.
This link is a photo of the valve. Cut off the top of the square area at the top of the valve. You can see how the blade would then be exposed. The seals will still be intact and you won't leak any fluids.
Slide Valve with Gate Seals - Product - Camping World
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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09-05-2012, 04:25 PM
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#7
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,886
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After seeing that picture Don, after trying your idea and if I was less than successful for some reason, I would be real tempted to drill a small hole in the opposite end try and push it open.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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09-05-2012, 08:17 PM
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#8
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Jun 2008
Location: Glendora Ca.
Posts: 1,585
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way back when I used a solder gun with a flat tip to cut a 2" x 1" slot in the outer case and used a flat screw driver to slide valve open. No mess.
Mike
__________________
2004 Monaco Monarch
Blueox, SMI, 1990 Wrangler YJ
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