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This photo shows the drain pipe bayonet with the lever just to the left and a long rod dangling with little support. Repeating this 6 or 8 times for the black dump valve and the grey dump valve solves the problem. vinessa vidotto parents. To treat the typical tank, 3 to 4 ounces of the mild, perfumed treatment is sufficient. He said that usually the issue isn't the cable, but the gate valve & rubber seals. lubricating dump valve cables | Heartland Owners Forum Heres How to Fix Your Stuck RV Black Tank Valve, How to Unstick Your Stuck RV Black Tank Valve, Preventing Your Black Tank Valve From Getting Stuck Again. This will then lube the valve seals. oz. One way to unstick your RV black tank valve is to put Dawn dish soap and water in your black tank and then drive around. It has a door where you gain access to the city water inlet, fresh water tank fill, cable hookup, dump handles, and tank flush. Only lubricated 2 times but started sticking after all these years. Remote valve cable - CrossRoads RV Family Forum I would do this as I was waiting for the tanks to dump not sure but I think they are starting to work easier. Now turn the handle counter-clockwise by hand to remove it, and screw a new one on firmly. To our readers: We NEVER have or will sell reader's data. Keystone RV Forums > Keystone Tech Forums > Repairs & Maintenance: Lubricating dump valves? We scratch our heads on that theory. Everything You Need to Know About Operating Your RV Waste Tanks CALL 361-729-0031 FOR MORE INFO. As mentioned above, you can simply spray or rub the lubricant on the valve after youve dumped the black tank contents. Theres no guarantee any of these things will work, but they are worth trying if you need to get those drain valves open to dump your RV.