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10-04-2014, 01:40 PM
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#1
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Senior Member
Join Date: Nov 2011
Location: Brookfield, WI
Posts: 211
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Black Tank Lubricant
The dump valve on my black water tank is difficult to open and close. What would be the proper lubricant to free up the valve without affecting the seals?
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10-04-2014, 01:55 PM
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#2
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Some type of cable lube will do as long as you can work out a way to apply it the full length.
Did it just become hard or has it been over time?
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2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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10-04-2014, 02:13 PM
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#3
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Senior Member
Join Date: Jun 2013
Posts: 10,833
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I used some inexpensive vegetable oil. Make sure tank is empty, use a litre and work the valve to lube the seals.
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B and B
2022 Venture RV SportTrek STT 302 VRB Travel Trailer
2018 Heartland Landmark 365 Louisville 5th Wheel
2015 Heartland Bighorn 5th Wheel
2013 FR Rockwood 8289WS 5th Wheel
2012 FR Rockwood 2703 SS Travel Trailer
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10-04-2014, 02:53 PM
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#4
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Senior Member
Join Date: Mar 2013
Location: Cut Off, La.
Posts: 1,830
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Has it always been difficult? If not it may be damaged, might not be a bad idea to buy a spare to keep on hand just in case.
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2013 Berkshire 390BH
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10-04-2014, 03:02 PM
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#5
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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There was a thread here awhile back where someone found the cable and housing kinked from a bad install causing it to bind up.
While a spare is a good idea the cause needs to be looked into and corrected.
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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10-05-2014, 08:37 AM
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#6
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Senior Member
Join Date: Dec 2012
Location: Michigan
Posts: 1,440
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Mine had to be replaced after the first time I used it you would think the factory would try it before it left
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2012 Wildcat 344QB
06 LBZ ,CC 4x
lots of mods
Superglide
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10-05-2014, 08:48 AM
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#7
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by jevanb
Mine had to be replaced after the first time I used it you would think the factory would try it before it left
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And the dealer should have tried it while getting it ready for the PDI.
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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10-05-2014, 09:50 AM
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#8
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Senior Member
Join Date: Jan 2011
Posts: 2,106
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My grey tank valve is very hard to pull and it's been like it since day one. When I did my rerouting sewer modification, I took the thing apart, greased it up with some silicone grease and it worked easy peezy, on my work bench. When I put it back in place, tightened the 4 nuts, back to the original , hard to pull operation again. I just use both hands to pull that valve. In time, the handle will break. perhaps I should have a replacement on hand. Defer to next spring. Out of site, out of mind.
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Terry/Bernadette Lily the Yorkie 2019 Dodge Ram Sport 1500 2019 FR Vibe 28RL
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10-05-2014, 10:22 AM
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#9
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Senior Member
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,422
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CW sells a product that you dump in your empty tank and let it set for 4 hrs or so if I remember. I had a hard time pulling mine open after I used it no problem like before. It is also a protection for your seals. I used it in all 3 tanks. I think I used a quart.
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Coachmen M/H
Concord
2018 / 300 DSC
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10-05-2014, 11:10 AM
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#10
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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I've been told you can use peanut oil also. Never tried it, but the TST stuff is just coconut oil.
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