Originally Posted by Stan
The tank has two "ribs" that stick out from the sides (molded as part of the tank). These ribs run the entire length of both sides. The ribs sit on two pieces of angle iron that run between the frame rails and are bolted/ welded(?) to the frame rails. It's possible the angle iron has shifted or the ribs have broken allowing a shift in the tank. There are no straps or bottom supports for the tank. It's also possible the spacing between the angle iron bars were placed just a bit too far apart. Only dropping the membrane will tell for sure what is really going on. I certainly would not drive it or fill the tank until you investigate further. Keep us informed.
I had my tank drop down last year as well . The angle iron brackets as noted above can flex out as weight is applied from waste. These L or angle brackets when flexed will allow the tank to slip down until pinched.
I had to put a gusset between my black and gray tanks, not allowing either to flex out to solve the problem.
I question the gauge of the steel used as it easily flexes over the 8' length, across the trailer.
Don't Drive until fixed!
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider