Black tank pull valves are leaking on my fuzion

[emtsrus]

I have a 2019 keystone fuzion 373. I need to replace both black water cable valves. My question is, where do I cut the bottom to gain access?
Didn’t know if someone had a service drawing of the bottom that shows the area to cut?

[emtsrus]

Will do, thanks a lot!

[ReneeG]

Keep us posted on the results.

[emtsrus]

Thanks for all the replies, i am going to try using a dissolving type cleaner, then a bottle of valve lubrication, if that don’t work I’ll just have to cut me an inspection hole to see where I need to start. If I have to cut it, I will cut it on 3 sides folding it towards the front so the wind won’t pull it back open and go for it. May even try the electric valves. I researched one that turns the light off thru limit switch when fully closed.
My problem started with the back tank leaking, now it’s both black tanks. Thanks again for the tips.

[midnightsadie]

so figure out where to cut ,and how you,ll fasten them back up. then do it. OR some day you,ll have a tank full of poo and can,t get rid of it. rubber gloves and go to it.

[ReneeG]

I hope it helps too. We also had put on an external valve gate because it wasn't closing all the way.

[midnightsadie]

could be just your cables are rusted a bit.

[wildtoad]

I really have a hard time when manufactures design a system knowing the parts have to be replaced from time to time, so it requires a dealer/technician to replace simple parts.

[emtsrus]

Thanks for your response and info. They are cable pushed and pulled. They are very hard to work, so I figured they wasn’t closing all the way because I had to put a valve on the outlet for the sewer hose to attach. There possibly could be something in them. I have tried the tank blaster wand for the back tank with no results. The front tank is impossible because of the way the sewer is routed to the tank. I will try the drain valve lubricant and see what it does. Hope that will do it, it will be a pain in the butt to find and fix them I’d think. I called Keystone for a diagram but they want a dealer to fix it. I don’t wanna pay their price, since I am capable of the repair. Lol

[ReneeG]

Are you sure you need to replace them? Ours wouldn't close completely and we thought the same, but a serviceman at a local RV shop said they are probably gunked up. He recommended Thetford RV drain valve lubricant. We followed the directions and they now open and close completely!