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Old 12-17-2012, 09:28 AM   #1
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What the heck is this thing under the hood?

I was browsing through the owners manual for my 74 Argosy motorhome and noticed a strange looking device located in the upper half of the engine compartment.

Looking at the pictures you'll see something with two hoses coming out of the bottom of it and what appears to be a squeeze handle (like you would see on a caulk gun or similar) on the left end.

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Any suggestions as to what that thing is? I've never see anything like it on any of the Argosy pictures that I've ran across and mine certainly doesn't have it.

Brad
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Old 12-17-2012, 10:02 AM   #2
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Atwood Water Heater GH6...

Hi Brad,

I don't own a MotorHome, but those look like water hoses...Are they?

If 'yes', then they might go to your water heater - Atwood Type GH6 water heater.

Good Luck,
Chris
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Old 12-17-2012, 10:16 AM   #3
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Chris, I really don't have a clue what those hoses do or where they are routed.

The Atwood water heater is located quite a ways from where that device is.

I guess I just can't fathom what feature of a motorhome that it could have been a part of.

Gotta love a mystery!

Brad
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Old 12-17-2012, 10:25 AM   #4
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Is it in a Diesel section of the manual? Isuzu injection pump/fuel fileter air purger pump maybe? (I don't even know if they put them in Argosys????)
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Old 12-17-2012, 11:12 AM   #5
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As far as Argosy motorhomes go I don't believe there was a diesel option. My 74 manual only mentions 350 & 454 as choices.

I also have the Chevy manuals for my model year and none of them show anything like it either.

Brad
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Old 12-17-2012, 11:57 AM   #6
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Filter assembly perhaps? For the Hydro Boost? Those look like a low/medium pressure type factory hose.
I've never seen anything like that.
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Old 12-17-2012, 12:38 PM   #7
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Quote:
Originally Posted by Robfike View Post
Filter assembly perhaps? For the Hydro Boost? Those look like a low/medium pressure type factory hose.
I've never seen anything like that.
Would you need a hand pump with a filter assembly?

I agree the hoses look like low or medium pressure style hoses. I'm going to have to go back through the 1974 Chevy parts manuals (with pictures fortunately!) again and see if anything looks close.

Who knows this might just be one of life's little mysteries that never gets resolved

Brad
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Old 12-17-2012, 12:56 PM   #8
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I don't think it's a Chevy part. I've never seen anything like it on the old P-chassis at all, as produced OEM.
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Old 12-17-2012, 01:27 PM   #9
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Rich,

That means we've narrowed it down to being something that was likely installed by Airstream. So what gizmo would Airstream add to a motorhome that looks like this? We need to keep in mind 1974 was the first year that Airstream sold the Argosy motorhome.

I just remembered that I have a 1976 Argosy owners manual (thanks Matt!) and interestingly enough this device is not shown in the engine compartment in any of the photos.

So does that mean it was only present in the 74 and maybe 75 models? I guess the other question is did whatever it is make it past the development phase?

Brad
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Old 12-17-2012, 01:32 PM   #10
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Well, I don't know, but I thought AS had bought some rolling chassis and installed (had installed an Isuzu diesel, as an option). I have no clue if that is the case and if Argosy did the same, but It still looks like a low pressure fuel system purge hand pump. That's all I can come up with!
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Old 12-17-2012, 01:47 PM   #11
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I wish I could see it more clearly. Upon further examination, is that a cable housing coming in from the right, running under the aluminum housing, and attached to the lever on the left side. That would indicate some kind of cockpit slide or pull knob?

Wish I could see the upper part. It would really be an elaborate overkill if it were a heater control valve for the rear of the coach?
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Old 12-17-2012, 01:49 PM   #12
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They never used vacuum or hydraulic wiper motors, did they?
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Old 12-17-2012, 01:56 PM   #13
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Quote:
Originally Posted by dznf0g View Post
Well, I don't know, but I thought AS had bought some rolling chassis and installed (had installed an Isuzu diesel, as an option). I have no clue if that is the case and if Argosy did the same, but It still looks like a low pressure fuel system purge hand pump. That's all I can come up with!
Rich, you're probably right in that Airstream probably offered the diesel as an option. From what I understand they would do just about anything if the money was right

I'm inclined to agree that the device probably has something to do with a diesel engine. Unfortunately I know nothing about the Isuzu diesels or how they were implemented in the Airstream motorhomes.

Hopefully Fred will chime in with any information he might have on diesels in the Argosy motorhomes.

Thanks!

Brad
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Old 12-17-2012, 01:59 PM   #14
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Can you tell where the hoses go? Are they water hose, or oil, or fuel, or air? Also where does the cable go. Have someone inside move all the controls one at a time, and see if you can get the cable to move. Try the heater controls first.
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