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Old 07-14-2021, 11:06 AM   #1
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Chassis damage

Hey guys

Just got my rv 2001 endeavor 40 ft rr8r, it's my 1st rv and noticed 3 chassis crossmembers broken when I got it home. I own a welding shop here in socal and I'll repair it this weekend. Do you think this could of came from the leveling jacks?
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Old 07-14-2021, 11:14 AM   #2
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Wow - good thing you know a welder!
The leveling jacks themselves didn't cause the issue, even if those are the members on which the jacks are mounted. They may have broken while on the jacks, but even then that would indicate a failure of the structure, not a problem cause by the jacks. So once you get things welded back into place don't by afraid to use the jacks.
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Old 07-14-2021, 11:14 AM   #3
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Anything is possible depending on where the jacks are located. But it kind of looks like it has been attempted to be fix before?

I was always told to make sure you isolate the jack & engine/transmission control modules before doing any welding. Also make double sure you have a sound ground. But owning a welding shop I suspect you already knew all of this.

Post back here and show us before and after pictures
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Old 07-14-2021, 11:36 AM   #4
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Thanks guys, I'm new to this stuff and saw a video that said to never leave the tires lifted off the ground when leveling. Instead use these lego blocks under the tire so it takes some of the weight. I thought maybe the previous owner did that and maybe that's why it broke idk. Yes someone tried to do a repair before Pretty crazy. I'm currently re fiberglassing the hinge block back in for the front end door of the coach. Then I'll do the frame next.
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Old 07-14-2021, 01:18 PM   #5
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Originally Posted by dimestacker View Post
Thanks guys, I'm new to this stuff and saw a video that said to never leave the tires lifted off the ground when leveling. Instead use these lego blocks under the tire so it takes some of the weight. I thought maybe the previous owner did that and maybe that's why it broke idk. Yes someone tried to do a repair before Pretty crazy. I'm currently re fiberglassing the hinge block back in for the front end door of the coach. Then I'll do the frame next.
You will read and hear a LOT of stuff on forums and You Tube, and some of it could actually, possibly be true!

I use a electronic leveling device that indicates how many inches I need to add to each wheel to get the coach level before I apply the stabilizers. But we have been in situations where the front wheels elevated off the ground by 8 inches or more! I carry an entire forest worth of lumber to level with because we often camp in less than level campsites! So much depends on your coach and how comfortable you are with wheels off the ground. It doesn't bother me all that much, but some owners are real particular about it.

Just do what you feel is right. Take in information and make decisions.
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Old 07-14-2021, 02:55 PM   #6
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I agree with the others. Someone before you broke this chassis and did a poor repair job.
Do your jacks attach to the main frame rails?
And these broken rails are on the cross members?
Then someone did something else to break it.
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Old 07-14-2021, 03:02 PM   #7
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Yipes! When you are finished, it will be stronger and better than when it rolled out of the factory.
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Old 07-14-2021, 03:03 PM   #8
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I'm sure you may know this but here is a sticker in my battery compartment.
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Old 07-14-2021, 03:47 PM   #9
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I'm sure you may know this but here is a sticker in my battery compartment.
I'll have to add that to my picture files! Thanks
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Old 07-14-2021, 04:36 PM   #10
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Be sure to disconnect all power from inverter before welding on frame, check your owners manual.
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Old 07-14-2021, 08:21 PM   #11
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Totally appreciate all the input guys. I'll definitely disconnect the electronic devices. Electricity takes the path of least resistance and I keep my ground right next to where im welding. I'll send a update when I do this weekend.
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Old 07-14-2021, 08:38 PM   #12
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Man that's a lot of material cut away for pass through. you may want to fabricate saddle to drop under connect both sides.
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Old 07-14-2021, 10:27 PM   #13
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Good idea. Yeah there's barely any meat left to weld on.
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Old 07-16-2021, 05:57 AM   #14
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Welding (and drilling) should never be done on the flange of a frame.
It looks like someone made an improper repair of a previous crack. Crossmembers should not be welded to the frame either.

The FMCSA (Federal Motor Carrier Safety Administration) 49th article(49 CFR ß 393.201 – Frames) states that “no holes shall be drilled in the top or bottom rail flanges, except as specified by the manufacturer,”
Frame welding includes drillings, cuts, splicing, and welds, and thus is considered as a violation of FMCSA code.
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