Originally Posted by DKRITTER
We are going to put the trailer (36 CKTS) in the shop shortly for some little things that need attention, one of those is all 3 tank valves are really hard to open or close.
Both of the grey tanks are hard to either open or close and the black tank is an arm wrestling match.
I'm surprised it is this difficult to open or closed and even after I close it, it still drains about 20oz of black water in the pipe. I've had to change the cover to one with a hose fitting so I can drain it before use to avoid the mess.
Does anyone have a solution to cable operated tank valves to make them easier to operate?
Before retiring from Caterpillar, I was involved in a project on push-pull cables trying to make them easier to work on construction equipment. Never could get the cables to work effortlessly. They would hang up and bind mainly because of routing issues such as to many bends or too tight of a bend or too long. Another issue was lubrication we even tried Teflon line cables and these would fail due to dirt and debris building up on the cable and would enter the housing causing the binding.
So a lot depends on routing and length of cable, plus nice easy bends to make the cables operate with minimal effort. Also remember that you are pushing a gate valve closed with the cable and if this will flex this maybe an issue when closing. Another thing to remember is; if there is any debris in the path of the gate valve this too will make closing the valve harder and may not even allow the valve to close completely.
So to make your life less stressful install an additional gate valve on the end of the drain pipe and just open and close this after the sewer hose is connected. This is what I have down and I do not stress over the tank valves closing completely.