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Old 01-02-2016, 10:57 PM   #1
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Rust from king pin, 5.0TA

Has anyone else experienced rust stains coming from the king pin box on their 5th wheel? It has really become a bit of a mess, as you can see by the picture that I have hopefully attached. Looking forward into the King Pin box, I can see exactly where the rust is coming from. I wish I could attach more pics, but my iPod is only letting me attach one. I even have rust stains running out from under the tail gate and onto the exhaust tail pipe.
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Old 01-02-2016, 11:10 PM   #2
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Wow, that's crazy. Two years on ours with a lots of rain, dirt roads and zero stains/marks. Scott

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Old 01-02-2016, 11:31 PM   #3
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Rust

I don't know much about 5th wheel king pins on campers but we always stripped the grease off of our truck and 5th wheel equipment trailer in the winter, put a fresh coat of paint on everything and then applied grease liberally. Never had much rust. Maybe the Escape folks could give you some insight? It looks dry to me, wouldn't that cause galling and expose raw steel that will rust?
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Old 01-02-2016, 11:40 PM   #4
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A bit inconvenient, but I can only upload one photo at a time.
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Old 01-02-2016, 11:41 PM   #5
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Looking inside the pin box.
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Old 01-02-2016, 11:42 PM   #6
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Final picture
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Old 01-02-2016, 11:50 PM   #7
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Yup, it's rusty in there. Looks like the heat from welding destroyed the paint here and there. I would coat it with a rust reforming primer and then " Paint it Black." Paint and grease are cheap.
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Old 01-02-2016, 11:53 PM   #8
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We picked up our 5.0 on the first week of May 2015, so it is still very new. I wonder if maybe this pin box sat outside at the vendors lot or possibly E.T.I. for a length of time before making it to the production line. I will send an inquiry to E.T.I. and get their opinion.
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Old 01-03-2016, 01:00 AM   #9
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The plastic lube plate is intended to be used dry, and should prevent any problems with scraping the pinbox... but the rust is coming from above that, anyway.

In a previous discussion (ETI Kingpin Box) Bob mentioned that he was seeing rust. In that and various discussions, we concluded that the pin box is likely a Lippert 1716. I would probably check with Lippert on this.

If the rusting is all in the lower section of the pinbox... that can be removed (by removing a dozen bolts) and replaced, either for repair or replacement.

I would hope that paint damage from welding would not be a problem for the lower section, since all welding is done in the factory, which would paint (or possibly power-coat) the assembly after welding. In contrast, the upper section is welded to the trailer's frame, long after Lippert is done with it, and presumably at the frame fabrication shop. Perhaps some painting was missed at that point.
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Old 01-03-2016, 01:06 AM   #10
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Yup it's just a little surface rust coming from the steel inside the pinbox, mine does it too. Nothing to worry about it won't rust through. Just a little messy, I was going to get in there with a black spray can this summer but never got around to it, maybe next summer if I have time.

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