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Old 09-17-2010, 11:39 PM   #1
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Post Trailer hitch

Received my used "new" old Rockwood with a stinger and no ball installed in the hitch. It took a small sledge hammer and some time to remove the stinger. I cleaned it up with wire brush and several other attachments on my die grinder and still can't install any of my own attachments (stinger, bike rack, luggage rack). The opening measures 2", the same as my pickup, where all of these attachments fit. Was there an odd size hitch tube used on RVs or is this just a bad install? I noticed a weld down one side of the tube like it was manufactured that way or repaired. If repaired it probably had shrinkage - would explain the size.
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Old 09-17-2010, 11:52 PM   #2
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hate to say it, but going by what little you explained, I would say to keep at it with the wire brush.... there is only 1 1/4" and 2" receivers... if you took a hitch receiver out of your pickup and slid it into the back of the RV it should fit, if it starts but doesn't go in all the way, then its just that dirty in there.

my .02

if you have axle grease, smear a bunch onto your ball hitch from your pickup and smear a bit to the walls of the receiver on the rv, that might help you out.

if you don't have axle grease, try Turtle Wax, it is thin and very lubricated, I used wax on mine last year when I was trying to get my receiver on my blazer cleaned out .

the weld seam you are seeing is factory, they take a flat piece of steel and bend it to a square so it has to be seemed together somewhere.


good luck!
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Old 09-18-2010, 12:12 PM   #3
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Good info,thanks. I've got the inside clean. I even used a stone on the weld so it is flush. Guess I need something more aggressive to grind the walls down a bit, Don't think I'm to the grease stage yet. It slides in about 2 in. then stops abruptly. Very tight. Atleast now I know it Should fit and can continue.
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Old 09-20-2010, 11:37 PM   #4
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been a few days... just wondering if you came out with any luck or not?
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Old 09-22-2010, 11:54 AM   #5
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Strange you should ask. I just all but gave up. After all the grinding and cleaning I could do (it shines now) I got the old stinger to slide in easily. Problem is I had to drive it out the first time so the ball attach hole is dinged up. This one also has chain attach loops attached to it with screws. They are falling off. So I wanted to use the stinger I use on my pickup - same manufacturer, same part number. It will now insert about half way and stops dead. I could probably drive it in but that's not how they are supposed to work. Thought I'd go to a hitch place to get an idea. Maybe one stinger is just a little large. Funny tho, it fits the truck just right.
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Old 09-22-2010, 08:01 PM   #6
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maybe the truck is a bit more worn out.... lol
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Old 09-28-2010, 08:32 PM   #7
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Tried to post an image of the setup but don't have a url. Took the MH to a hitch place and they determined that it is home made. They used a piece of 2" standard square tubing instead of receiver tube. It has a different wall thickness - thus the problem. I'll have the tube replaced with receiver tube.
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