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05-15-2019, 05:23 AM
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#1
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Senior Member
Join Date: May 2018
Location: Oregon
Posts: 1,138
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Black tank Cable valve
Soooooo I have had the 5th wheel out 2 times since I got it back from the dealer for warranty work.
First time the black tank was open. Yeah! Poo bath! I chalked it up to someone forgot to close it.
Well this trip it’s not closing.
Do the cables break? They were under it a lot for repairs maybe it’s been disconnected?
Anyway to tell without pulling the belly off (doubt it)?
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05-15-2019, 06:13 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,235
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Does the handle move easily? It’s not a cable, it’s a single wire, but everyone calls them cables.
It could be kinked, but you will need to access it to see. Some givers have access through the back wall of the basement.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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05-15-2019, 06:43 AM
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#3
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Senior Member
Join Date: May 2018
Location: Oregon
Posts: 1,138
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Quote:
Originally Posted by chuckster57
Does the handle move easily? It’s not a cable, it’s a single wire, but everyone calls them cables.
It could be kinked, but you will need to access it to see. Some givers have access through the back wall of the basement.
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Yes, it moves freely like alway
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05-15-2019, 06:47 AM
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#4
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,841
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The holding tank valve "cable system" is a Bowden Cable. What that means is that it's a single wire run through either a "spring type" or "hollow cable type" structure. Look at the handlebar brake cable on your bicycle, the speed control cable on your lawn mower or the thumb actuated accelerator cable on your ATV. They all are "Bowden Cable" systems.
Usually they are a very reliable system, but pulling them too hard can break the plastic valve seat, installing them with a "kink in the cable" can make them difficult to operate and rust/corrosion will make them impossible to function. If the outer cable structure is not secured to the frame, the entire assembly moves, which makes opening the valve "impossible".
Take a look at your system, many don't have "cable slide valves" and yet they get blamed for "cable problems". Often, debris in the valve seat/seals, kinks in the cables or rust/dirt in the sliding part of the cable are the problem.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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05-15-2019, 07:56 AM
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#5
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Senior Member
Join Date: May 2018
Location: Oregon
Posts: 1,138
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Quote:
Originally Posted by JRTJH
The holding tank valve "cable system" is a Bowden Cable. What that means is that it's a single wire run through either a "spring type" or "hollow cable type" structure. Look at the handlebar brake cable on your bicycle, the speed control cable on your lawn mower or the thumb actuated accelerator cable on your ATV. They all are "Bowden Cable" systems.
Usually they are a very reliable system, but pulling them too hard can break the plastic valve seat, installing them with a "kink in the cable" can make them difficult to operate and rust/corrosion will make them impossible to function. If the outer cable structure is not secured to the frame, the entire assembly moves, which makes opening the valve "impossible".
Take a look at your system, many don't have "cable slide valves" and yet they get blamed for "cable problems". Often, debris in the valve seat/seals, kinks in the cables or rust/dirt in the sliding part of the cable are the problem.
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Thanks! I’ll crawl in the basement tonight and see what I can. It worked fine up till getting out of the shop
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