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sticking holding tank cables


randpb

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I have attempted to squirt some WD4 and silicon up the cable when it was fully out to give it some lubrication. I have had mixed results but mostly 2 of the 3 cable controlled tank dump valves feel very spongy and sometimes do not close tight resulting in an unpleasant but sporadic surprise. Any fix will have to wait until I have the underside open.

Meanwhile I got one of these and love it. http://www.amazon.com/Valterra-T58-Twist-On-Waste-Valve/dp/B000BGHYJS/ref=sr_1_fkmr3_1?ie=UTF8&qid=1445124493&sr=8-1-fkmr3&keywords=knife+valve+with+rv+sewer+connection

No more surprises.

Later,

J

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I might be wrong : I'm sure a bit of lube on the cable core wire would help , but ...I've found the valve gate sticking to the seals that made the unit feel stiff . I tore a valve apart and cleaned the gate and the seals and lubed them with WD40 ( probably not the best choice ) .

 

Stiff valves lead to the cable sheath separating from the valve . Something has to give , sooner or later .

 

I have one cable sheath that came out of the valve . The cable core is still secured to the valve slide gate . That valve is close enough that I can hold the sheath in place while closing the valve . If it were much farther away , it would have to be replaced or a second valve installed , like KodiakJack has done . I installed a Dual Flush for a different initial reason , which has a valve and serves the same as Jack's . But , my valves still close tight enough ..

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I can access the back side easily so I remove the back nut and tape it so I don't lose them. I remove the handles and pull the cables out and tie them up as vertical as possible. I use a product called tri-flow and squirt a little and wait till it goes down I'll repeat several times. Tri-Flow doesn't dry out and works well.

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I have attempted to squirt some WD4 and silicon up the cable when it was fully out to give it some lubrication. I have had mixed results but mostly 2 of the 3 cable controlled tank dump valves feel very spongy and sometimes do not close tight resulting in an unpleasant but sporadic surprise. Any fix will have to wait until I have the underside open.

Meanwhile I got one of these and love it. http://www.amazon.com/Valterra-T58-Twist-On-Waste-Valve/dp/B000BGHYJS/ref=sr_1_fkmr3_1?ie=UTF8&qid=1445124493&sr=8-1-fkmr3&keywords=knife+valve+with+rv+sewer+connection

No more surprises.

Later,

J

I did a similar hookup cept mine glued on and mine were electric. Those cable valves need the same lubricant as the electric valves its called 101 something. If the cable hasn't started to unbraid, Then you may want to check with a motorcycle shop. They sell cable lubricators that hinge open and then close over the cable one end over the housing of cable the other end over the inside cable and then it has a little hole in it that a tube from spray lubricant fits in and shoves full pressure from can into cable. But most of the time I have found its cable replacement time. You can try unbolting valve and if it works freely then it can all be lubed as needed

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