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Old 08-03-2020, 03:38 PM   #1
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Grey tank sagging?

I did a walk around and I noticed that the grey tank was visible from the outside.

I'm wondering how hard it would be to fix this.


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Old 08-03-2020, 03:55 PM   #2
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Originally Posted by ethan1 View Post
I did a walk around and I noticed that the grey tank was visible from the outside.

I'm wondering how hard it would be to fix this.


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My son's reasonably new, but out of warranty, toy box is doing the same thing. (fresh water tank, not grey) We just noticed it last week.

With the tank empty, we will jack up the tank into it's original position, then we're going to fabricate some flat straps (1/4") and slide it under the tank but on top of the I beam frame. Either tack weld it or screw it in place and hoping that will be it.

Probably a good weekend job but we're waiting for the weather to get a little cooler. We don't want to wait too long as cooler weather will probably make the tank more rigid and harder to raise up.
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Old 08-03-2020, 04:49 PM   #3
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Hopefully you have access to a welder, or your paying someone else. take coroplast off to expose. Jack up, measure up, weld up. Cut the corners off some angle iron so it sits as tight as possible and the coroplast sits tight when back on and be done.. check other tanks while your in there. As stated above a weekend job..
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Old 08-03-2020, 11:33 PM   #4
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I wonder if there's a way to temp fix this with self tapping screws & sheets of metal?

Then later hire someone to weld it on.

Kinda tricky dealing with this while being on the road.
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Old 08-04-2020, 06:03 AM   #5
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I wonder if there's a way to temp fix this with self tapping screws & sheets of metal?

Then later hire someone to weld it on.

Kinda tricky dealing with this while being on the road.
Depending on the frame layout you may be able to bolt/screw on some flat bar stock which you can get at Lowes,HD or ACE.

Your going to have empty the tank and lift it up.I would use a floor jack and a piece of plywood.At that point check the original mounts .Maybe you can fix them some how.
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Old 08-04-2020, 06:11 AM   #6
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What is the root cause? Do you travel with any waste water in the tank? The extra weight might be the issue (just speculating).
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Old 08-04-2020, 07:59 AM   #7
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Root cause is a design or build flaw. It should be designed to carry the weight of a full tank in a moving road vehicle.

Sheet metal is not going to do it. Something thicker is needed. Above posts are good.

You could put a support outside the belly cover from left frame to right frame and screw up into frame. Use a "U" channel or angle iron. You could even use a stout length of treated wood. It would not be the best long term solution, but may be easier to do while on the road.

Even easier, make sure the tank is empty while traveling. Tow short distance to dump site at slow speed make sure it is empty before next leg of trip. Fix it correctly when you get home.

If it is so loose it is in danger of falling out while stopped, you can support it from the ground using a jack or other support. Your call if you can tow it short distance to dump.

I wish you good luck and happy trails ahead!
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