| Stuck waste valve strategy? [message #91818] |
Tue, 13 July 2010 15:53  |
Dave Martin
Messages: 59
Registered: May 2010
Location: Ames Iowa Home Base
Karma: 0
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Well, I tried to dump my tank for the first time - it is completely full. But it is like the waste valve (standard for 26' '73, rear bed) is welded closed. I doubt anybody has tried to open it for a year.
Now what? Do I apply a slide hammer to pull the handle? Jury rig some kind of gear puller thingee for the handle?
Should I have a sanitation service pump the tank *before* breaking the valve?
Enquiring minds need to know!
Dave in Iowa (now)
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| Re: Stuck waste valve strategy? [message #91821 is a reply to message #91818] |
Tue, 13 July 2010 16:16  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Is the waste valve still the original Thetford valve? If so, you could try to unbolt it from the waste tank. However, you will obviously spill all the contents out on the ground, so maybe having the tank pumped may not be such a bad idea.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Stuck waste valve strategy? [message #91831 is a reply to message #91818] |
Tue, 13 July 2010 16:56 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Dave Martin wrote on Tue, 13 July 2010 16:53 |
Well, I tried to dump my tank for the first time - it is completely full. But it is like the waste valve (standard for 26' '73, rear bed) is welded closed. I doubt anybody has tried to open it for a year.
Now what? Do I apply a slide hammer to pull the handle? Jury rig some kind of gear puller thingee for the handle?
Should I have a sanitation service pump the tank *before* breaking the valve?
Enquiring minds need to know!
Dave in Iowa (now)
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Dave,
If it is original, then it is the older version Thetford valve with a stainless plate on the tank side. If it has been changed, you will have to figure out what you have.
If it is a Thetford valve, then I'm not just sure how that could happen. Don't be too grievious with the operating rod because the side can be broken where the rod hooks into it.
Something to try real early.....
Get under there (with it appropriately shored up) and take a soft hammer with you. Tap the valve all over but particularly the edges and keep pulling and maybe it will break what ever is sticking it.
Good Luck
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Stuck waste valve strategy? [message #91843 is a reply to message #91818] |
Tue, 13 July 2010 17:39 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Dave,
Refer to this photo, check to see if the valve stem will rotate. If so, it may not be too corroded. If it is stiff to rotate, then where the stem exits the valve body note the stainless cover. Remove the screws, giving you some access to the stem and spray a penetrating liquid everywhere. Also, remove the dump hose and spraying the penetrating liquid over the face of the slide valve. The slide valve blade to body inferface is plastic to plastic on the outside and really binds after it has been sitting for while. The stem can break-loose from the valve blade if you put too much force on it (like with a slide hammer) and then you have perhaps the worst case.
Good luck and let us hear back.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=31251&title=0112&cat=4620
Dennis Sexton
73 GMC
Germantown, TN
USA
-----Original Message-----
From: Dave Martin <dmartin@newarts.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, Jul 13, 2010 3:53 pm
Subject: [GMCnet] Stuck waste valve strategy?
Well, I tried to dump my tank for the first time - it is completely full. But it
s like the waste valve (standard for 26' '73, rear bed) is welded closed. I
oubt anybody has tried to open it for a year.
Now what? Do I apply a slide hammer to pull the handle? Jury rig some kind of
ear puller thingee for the handle?
Should I have a sanitation service pump the tank *before* breaking the valve?
Enquiring minds need to know!
Dave in Iowa (now)
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Stuck waste valve strategy? [message #91846 is a reply to message #91818] |
Tue, 13 July 2010 17:50 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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mine got harder and harder to operate. finally it stuck open, fortunately. with the tank empty i replaced it. mine was a newer version and has a plastic slide. the groove got filled with grit and toilet paper which jammed it up.
Fred V
'77 Royale RB 455
P'cola, Fl
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