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02-17-2014, 05:49 PM
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#21
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Full Time Camper
Join Date: Oct 2011
Location: Mn
Posts: 548
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I have to agree that the cause of hard opening and closing dump valve could be related to blade. I have a 2011 5th wheel 31RK that had a problem from day one. I took it apart and the seal had saw dust jammed in the groove where the blade goes. Works a lot better now.
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Lee & Jane and Black Lab Zoey
2008 Ford F250 CC Lariat 6.8L
2011 Crossroads Cruiser 31RK
Faribault MN
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02-17-2014, 06:09 PM
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#22
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Family Vacation Member
Join Date: Jan 2009
Posts: 144
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I put half cup olive oil with gallon of water in after last dump and when dumped a full tank today, it was amazing how easily it pulled! It sat maybe 2 hours with the gallon in it before we started using it again.
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02-17-2014, 06:25 PM
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#23
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Full Time Camper
Join Date: Jun 2011
Posts: 1,012
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I had heard of olive oil and was going to suggest it, beat me to it.
Does Extra Virgin work any better????
Ducking and running.
__________________
Clif and Millie
Ozzie (half a dog tall & 2 dogs long)
Mabank, TX
2009 Ford Lariat F350 SRW CC Diesel
2013 Cruiser CF305SK Patriot Edition
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02-17-2014, 06:29 PM
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#24
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,724
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Last resort: Liquid-Plumr Urgent Clear. It is safe on all plumbing, Ingredients include sodium hypochlorite, sodium hydroxide, biodegradable surfactant, and sodium silicate (corrosion inhibitor). Contains no phosphorus.
Flows thru all the water to the tank valve. Wait 10 minutes and it should dissolve all the "stuff" around the valve.
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Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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02-17-2014, 06:38 PM
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#25
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Full Time Camper
Join Date: Jan 2013
Location: Richland. Wa.
Posts: 624
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Sawdust.... no way...lol...we been full timers for a year now. Still have sawdust in the heat duct after a year.
Thanks to everyone for their help.
Gary
__________________
1998.5 Dodge 3500 4X4 Black Bart. 150k
2013 Rushmore Jefferson
2008 Raptor 299 toy hauler
Ruby & Jade. English Springer Spaniels
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02-19-2014, 06:33 AM
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#26
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Full Time Camper
Join Date: Oct 2004
Location: Texas
Posts: 1,508
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I decided to try mineral oil to see if that helps, doing the grey valve 1st and then recycling it for the black valve. Will see if that helps before more drastic action. Also dropped the underbelly for a better inspection and didn't see a big issue with the cable routing, I could move it a few inches, then open and close the valve and it would still be in the same location, so problem may be the valve and not the cable.
There is just enough clearance above the existing valve location to mount a Drain Master electric valve. A vertical opening valve should suffer less buildup than the present horizontal valve. Just not sure I want to spend that much $$. So, I'm leaning towards replacing the cable valve with a manual valve. It would need a short extension and a hole thru the I-beam and would come out curb side and a few inches in front of the steps, so not too difficult to see or operate. I'm going to buy one to have available, then remove the cable valve and try fixing it, otherwise I'll stick the manual valve in.
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Larry Day
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK
https://www.picturetrail.com/dayle1
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02-19-2014, 06:50 AM
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#27
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Full Time Camper
Join Date: Oct 2009
Location: Texas
Posts: 750
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I've had good results with TST Drain Valve Lube from CW.
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Russ
Forney,TX
2010 Cruiser CTX CT29RLX
2009 F-150XLT
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02-20-2014, 03:45 PM
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#28
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Full Time Camper
Join Date: Jan 2013
Location: Richland. Wa.
Posts: 624
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We'll the mineral seems to be working. Only needed one hand to pull the black tank valve open today. Yee Haw...
__________________
1998.5 Dodge 3500 4X4 Black Bart. 150k
2013 Rushmore Jefferson
2008 Raptor 299 toy hauler
Ruby & Jade. English Springer Spaniels
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02-20-2014, 04:21 PM
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#29
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,724
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Glad your getting somewhere with your problem. That TST drain valve lube sounds like something we all should look into.
__________________
Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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02-20-2014, 04:38 PM
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#30
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Full Time Camper
Join Date: Oct 2004
Location: Texas
Posts: 1,508
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Quote:
Originally Posted by Ramn4ver
We'll the mineral seems to be working. Only needed one hand to pull the black tank valve open today. Yee Haw...
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Yeah, the mineral oil has improved my valves. Did the gray valve 1st, then the black. The black handle is still very difficult, but once it moves a little the effort drops to almost zero.
__________________
Larry Day
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK
https://www.picturetrail.com/dayle1
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02-22-2014, 06:07 AM
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#31
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Full Time Camper
Join Date: Oct 2004
Location: Texas
Posts: 1,508
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Quote:
Originally Posted by Dayle1
Yeah, the mineral oil has improved my valves. Did the gray valve 1st, then the black. The black handle is still very difficult, but once it moves a little the effort drops to almost zero.
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Well I'm now prepared if the mineral oil doesn't work over time, I will replace the black valve with a manual valve. Went to the local RV store and picked up a valve, then to Lowes for threaded rod and threaded coupler, total less than $25. Will carry this in the camper just in case.
__________________
Larry Day
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK
https://www.picturetrail.com/dayle1
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06-15-2014, 01:44 PM
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#32
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Seasonal Camper
Join Date: Sep 2012
Location: Rockport, TX
Posts: 419
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The problem with our valve was apparently the long cable and it's routing. Pulled it out yesterday, and it works just fine. Replaced with an electric Valterra valve. Word of caution. The flange had to be trimmed for the Valterra brand valve. It is also difficult to get the valve in between the flanges. Love that easy to operate switch tho!
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Will
2013 Chevy 3500HD
2012 Rushmore 38CK
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06-17-2014, 08:39 PM
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#33
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Weekend Camper
Join Date: Nov 2011
Location: CT
Posts: 81
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I have replaced many black water valves. The cable opperated ones are the worse and seem to pull hard. Two reasons, one is the valve the other is the cable, so between the two its double the resistance. Bleach is a issue for the valves DO NOT USE. I have found the gaskets look good but the new valves work great for a while. Grease isn't good for rubber products, the do make a valve lub that can be dumped in the black take. Hope this helps
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Hug your family
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06-18-2014, 07:59 AM
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#34
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Seasonal Camper
Join Date: Sep 2012
Location: Rockport, TX
Posts: 419
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Quote:
Originally Posted by moparguy62
I have replaced many black water valves. The cable opperated ones are the worse and seem to pull hard. Two reasons, one is the valve the other is the cable, so between the two its double the resistance. Bleach is a issue for the valves DO NOT USE. I have found the gaskets look good but the new valves work great for a while. Grease isn't good for rubber products, the do make a valve lub that can be dumped in the black take. Hope this helps
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I wish I would have straightened the cable out and tried with it still in place. It was very easy to operate once out of the flanges. Due to tank configuration, there is little room to spread the flanges. I would agree with not using the petroleum products due to the seals swelling. Funny thing....I just replaced the ball valve seal in our Thetford toilet.....RV parts store says lots of Vaseline on it. I use a tube of silicone lubricant. Seems it is made by SuperLube.
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Will
2013 Chevy 3500HD
2012 Rushmore 38CK
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06-18-2014, 09:57 AM
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#35
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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We too have same black tank valve issue. Part of the problem, besides opening, is also closing the valve completely. Now I have to use a bucket under the dump opening when pulling off the cover due to a small black water valve leak.
I like the idea of Olive oil and will try that next.
Maybe the add on valve at cap next?
__________________
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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06-18-2014, 04:28 PM
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#36
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Weekend Camper
Join Date: Nov 2011
Location: CT
Posts: 81
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Quote:
Originally Posted by r2millers
We too have same black tank valve issue. Part of the problem, besides opening, is also closing the valve completely. Now I have to use a bucket under the dump opening when pulling off the cover due to a small black water valve leak.
I like the idea of Olive oil and will try that next.
Maybe the add on valve at cap next?
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Before add home remadies they sell a vale lube you dump into your tanks, made to help these valves. I also have found if there is not enough water used the toilet paper get caught in the valve. I use a bucket of water on top of the flush kit, it gives a greater rush of water when dumped into the toilet.
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Hug your family
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06-18-2014, 05:18 PM
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#37
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Weekend Camper
Join Date: Dec 2012
Location: Florida
Posts: 93
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We had this problem with our 2012 cruiser too. Upon disassembly of the valve to change it, found flashing build up on both sides of the pipe that was crushed into the blade when the valve was assembled. Cut the excess flashing off the pipes and have been easy to operate since. A friend of mine has a 2011 slingshot, we just took his black water valve apart and same problem. Now his is effortless.
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06-18-2014, 07:02 PM
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#38
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Seasonal Camper
Join Date: Sep 2012
Location: Rockport, TX
Posts: 419
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Quote:
Originally Posted by bdwillie
We had this problem with our 2012 cruiser too. Upon disassembly of the valve to change it, found flashing build up on both sides of the pipe that was crushed into the blade when the valve was assembled. Cut the excess flashing off the pipes and have been easy to operate since. A friend of mine has a 2011 slingshot, we just took his black water valve apart and same problem. Now his is effortless.
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I'm curious about the "flashing". The flanges actually have a raised area that pushes the seal against the valve blade. I think that is a design feature.
__________________
Will
2013 Chevy 3500HD
2012 Rushmore 38CK
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06-18-2014, 07:17 PM
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#39
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Weekend Camper
Join Date: Dec 2012
Location: Florida
Posts: 93
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The flashing was what looked like a little thin extra bit on the exact bottom of both pipes on the flange that butts up to the seal. It was like excess glue from when the pipe was glued together, same color of the pipe. Quick swipe with a razor knife and it came right off both pipes. It looked as though these little protrusions were binding the seal/blade on both sides. unfortunately didn't think to take a picture. It was like an old model car kit, that had extra plastic that had to be trimmed off at the joints. Same thing. Hope I am describing this well!
Also my friends slingshot was exactly the same. swipe with razor knife and all is well
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06-19-2014, 06:23 AM
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#40
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Seasonal Camper
Join Date: Sep 2012
Location: Rockport, TX
Posts: 419
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Quote:
Originally Posted by bdwillie
The flashing was what looked like a little thin extra bit on the exact bottom of both pipes on the flange that butts up to the seal. It was like excess glue from when the pipe was glued together, same color of the pipe. Quick swipe with a razor knife and it came right off both pipes. It looked as though these little protrusions were binding the seal/blade on both sides. unfortunately didn't think to take a picture. It was like an old model car kit, that had extra plastic that had to be trimmed off at the joints. Same thing. Hope I am describing this well!
Also my friends slingshot was exactly the same. swipe with razor knife and all is well
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I've got to open mine up again.....I'll have to look at that. I damaged one seal installing the new valve. Our black tank and galley tank drains directly oppose each other, so flange clearance to install valve was hard to obtain. I have a small drip on the valve.....not a good thing!
__________________
Will
2013 Chevy 3500HD
2012 Rushmore 38CK
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