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Old 09-24-2012, 09:01 PM   #29
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Originally Posted by Ora View Post
The pans are 42 3/4" long x 7" tall. Gray is 22" wide and the Black was 29 1/2". These were for my '74 Ambassador / 29ft rear bath, don't know if yours are the same
The tanks for the original 27 to 31-footers (rear bath) from '74 and '75 are identical, so of course, the frames will be the same too.
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Old 09-24-2012, 09:40 PM   #30
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Thx superman
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Old 09-25-2012, 06:23 AM   #31
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bad question

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The way the tanks are held in is with first the bubble pan mold, then the styrofoam, then the "pan". Its like a molded metal bucket with a 1 inch flat out flange. After that their is a small frame thats square and hinged at the back that connects to the crossmember. that allows the tanks to drop and come out of place for easier access. Some people have used the pan and bolted it on the c channel on the sides and rear most crossmember.

sorry I didn't ask my question very well. I have made new support frames and they are hinged at the front what I am unsure of is what holds them up in place at the back end? opposite the hinges It looks like from the image they bolt to a piece of C Steel that points down from the rear most cross member? Also do the bucket pans rest on there bottoms in the steel frames or hang from the flange at the top?
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Old 09-25-2012, 02:27 PM   #32
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Shadeemry,
Your right in that the tank frames bolt into a C channel that hangs down off the rear cross member. Mine had rusted out tabs on the main frame on each side, I assume the side of the tank frames bolt into that tab, thats the way I am going to do it,
I have had sheet metal pans ordered for over a month and the shop has not got them made yet, So I'm thinking about framing up pans out of stryofoam and cover inside and out with epoxy/fiberglass, making composite pans.
Also the frames hinge off the forward cross member? Mine had a 1x2 c channel welded below the cross member and they were hinged off this. Is this correct or a poor repair at some time?
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Old 09-26-2012, 01:46 AM   #33
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Shadeemry,
Your right in that the tank frames bolt into a C channel that hangs down off the rear cross member. Mine had rusted out tabs on the main frame on each side, I assume the side of the tank frames bolt into that tab, thats the way I am going to do it,
I have had sheet metal pans ordered for over a month and the shop has not got them made yet, So I'm thinking about framing up pans out of stryofoam and cover inside and out with epoxy/fiberglass, making composite pans.
Also the frames hinge off the forward cross member? Mine had a 1x2 c channel welded below the cross member and they were hinged off this. Is this correct or a poor repair at some time?

im in the process as we speak of creating a replica frame out c channel with smaller c channel skids welded in place, my frame roke at the cross member and when i went to drop the tanks, i had found what appeared to be a crude frame repair, the other airstreams i have seen of my make and model did not have their pan or tubs bolted into the frame, im not sure if this was an AS repair or what, but according to my shop manuel and the other airstreams i have found, they were exactly as illustraded in the diagram i had shown, the entire support was on the tank frame supports, (the frames with the hinges) that held the pans and tanks in place.

Fiberglass in my opinion would be a bad idea, the wrong rock , stress or vibration from the trailer could cause a whole mess of things from some of the people i have asked, i bet they would never rust out again being fiberglass, but one crack and i would presume it was over. thats my opinion however, i have no evidence or info to back it up.. i have heard of some fiberglass stuff that could take direct hammer hits and be fine, but im not sure what it was called.. you could always try that stuff..

if you need pages out of the manuel illustrating the rear frame and the tank information, let me know, and ill email it to you or post it here.
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Old 09-26-2012, 05:47 AM   #34
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Shadeemry,
Sounds like you and I have the same trailer. Everything was rusted out to the point that there's just enough evidence to get you into trouble.
I live in very rural South Dakota, the nearest town is 40 miles away and only one sheet metal shop in town. So airstream pans are not high on the pecking order.
My thought of fiberglass over foam would incorporate the foam for insulation and the strength of the pan. This is the same technique Burt Rutan used in all his aircraft design. For a rock guard I could lay a sheet of galvanized material under the fiberglass box.
I have my frame welded up, everything is held up waiting on these pans, just trying to come up with something to hurry the process up before the first snow fall.
I made my skid plate out of 2x3 rect tube and I carried it forward stopping short of the rear axle, welding into the axle plates.
Good Luck,
Jack
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Old 09-26-2012, 06:20 PM   #35
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It was a local heating supply company ... they cost me about $160, kind of pricey for this retired person, but I try to do things right (sometimes). I didn't want the tanks spread a mess on the highway. My first use of the Airstream was a 4500 mile trip to Texas, no mechanical problems.
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Old 09-26-2012, 06:27 PM   #36
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Rear Pic of tanks

Attached is a pic of the rear showing rear frame of holding tanks. the diagram in the earilier post is nice ... hope this clears it up some. I painted the new frames for the tanks with rustoleum blue (kind of matches the beltline stripe) not that anyone but me will ever see them.
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Old 09-27-2012, 02:27 AM   #37
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Quote:
Originally Posted by Ora
Attached is a pic of the rear showing rear frame of holding tanks. the diagram in the earilier post is nice ... hope this clears it up some. I painted the new frames for the tanks with rustoleum blue (kind of matches the beltline stripe) not that anyone but me will ever see them.
Awesome, that's exactly what I needed to see! Now I can get this done right.
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Old 09-29-2012, 06:19 AM   #38
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Quote:
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Attached is a pic of the rear showing rear frame of holding tanks. the diagram in the earilier post is nice ... hope this clears it up some. I painted the new frames for the tanks with rustoleum blue (kind of matches the beltline stripe) not that anyone but me will ever see them.
Yes perfect thanks so much!
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Old 10-02-2012, 07:33 AM   #39
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ok got my new tank frames welded up and installed this past weekend. thanks to the pictures posted. Thanks again. Now its on to making pans...
http://4.bp.blogspot.com/-QhPpoA3NDh...-34-52_294.jpg
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Old 10-16-2012, 03:29 PM   #40
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On that note how thick is the galvanized steel that the pans are made of? also can galvanized steel be welded?
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Old 10-16-2012, 10:18 PM   #41
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On that note how thick is the galvanized steel that the pans are made of? also can galvanized steel be welded?
Just go with 440 stainless. Yeah u pay the extra bucks, but it's better then paying twice as much in the LNG run not counting your time in it.
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Old 10-16-2012, 11:00 PM   #42
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IIRC they were made out to 22 ga.
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