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Old 10-19-2016, 11:40 AM   #29
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Hints here:
http://www.airforums.com/forums/f439...kes-89680.html
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Old 10-19-2016, 11:43 AM   #30
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and here:
https://www.airstream.com/wp-content...e6e67f5109.pdf
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Old 10-19-2016, 11:46 AM   #31
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Thanks for that [edit-first] link, but the thread I remember had a photo of the area behind the couch at the front of an older trailer. Coincidentally, in the early 1990's I looked at a used AS with vacuum brakes, and the old-timer owner took the time to show me the set-up at the tow vehicle's engine, because he wanted any new owner to sign on for the different kind of braking system.
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Old 10-19-2016, 11:58 AM   #32
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Yeah, all the pics I can find online show the tank behind the propane bottles...but I seem to recall a different mounting system, out in front of the bottles...but can't find what model years and lines.
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Old 10-19-2016, 12:40 PM   #33
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There are a couple of manuals located here that describe the braking system

https://www.airstream.com/service/ma...ear_select=878

Here are the manuals:

https://www.airstream.com/wp-content...xcella-500.pdf

https://www.airstream.com/wp-content...-0003.085c.pdf


It indicates that the brake booster was on the tongue (pg15).
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Old 10-19-2016, 01:27 PM   #34
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I bet Rich is right.
Our brakes are NOW electric, but someone must have changed them out at some point.
On the side of the camper is a fancy metal decal saying, "Excella Vac-Disc Brakes".

There was also a tall empty container behind the two propane tanks. That would have held the Vac Actuator. So, this must be an associated tank?

Pooh, I was really hoping it was something cool and exotic--or monetary!

I HAVE to buy the service manual! That would answer so many questions! So far, I haven't needed it, because you all are so smart!

Thanks so much, all.
We will let you know if it's anything different, but I bet that's it.

Now the pics and info are on the forums, in case another vintage (camper AND me) newbie asks, "What is this?'...
Ha ha!

Now for one more trip before we put Sir Winston inside to weather the Minnesota winter in comfort!
Terry
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Old 10-19-2016, 02:00 PM   #35
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Thanks for the details. So the tank behind the propane tanks could have been a vacuum reservoir, and the one under the floor a reservoir for hydraulic fluid? My impression of the vacuum systems, however, was that they did not involve any hydraulic fluid at all. That the vacuum went directly to each wheel's vacuum-driven cylinder. I guess adding hydraulics in the middle may have let Airstream take advantage of existing wheel/brake parts from trucks etc.?

Just guessing! Nice to have some threads coming together in this tapestry.

Now I will look for that older thread with a photo of the vaccum/hydraulic reservoir.
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Old 10-19-2016, 02:14 PM   #36
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OK ready for this older thread entitled "What is this???"






Check out the photo in Post #1:

http://www.airforums.com/forums/f287...is-149279.html

And the OP's finding a "brake release tag" in the last post.

Rich, what do you figure, vacuum only, with no hydraulics?

Phew, small world . . .

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Old 10-19-2016, 03:09 PM   #37
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Nope, vacuum over hydraulic
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Old 10-19-2016, 03:27 PM   #38
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Thanks Rich.

Terry, if you ever get that cover off more photos would be great to see. When you open the photo attachment in that old thread, the same male threaded plug does seem to be there, as I was guessing is in yours too.

Have a great trip!

Peter
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Old 10-20-2016, 07:21 AM   #39
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Quote:
Originally Posted by OTRA15 View Post
OK ready for this older thread entitled "What is this???"






Check out the photo in Post #1:

http://www.airforums.com/forums/f287...is-149279.html

And the OP's finding a "brake release tag" in the last post.

Rich, what do you figure, vacuum only, with no hydraulics?

Phew, small world . . .


Wow, that's GOT to be it!!
Thanks, Peter!
I looked all over the forums before posting this, but didn't spot that one--AND with the same title! Ha ha!

-Do you think someone might have converted it to a safe? Just maybe?
Ha ha!
Thanks again!
Terry
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Old 10-22-2016, 08:27 PM   #40
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I exnay the DB Cooper stash.

They were moonshiners.




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