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Old 06-09-2009, 06:06 PM   #1
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Good evening, probably years since I posted here, glad to see all of you still active! I am conflicted about what to do and am studying several options. One of them is building a 16 foot long box on my 770 for a living quarters. My Gold 770 is singled long, and the 16 foot box represents a box with a 4 foot over hang.

My question, the first of several, is I have a air ride cab, and am going to bolt the box to the frame, hence perhaps needing a flexible interface between cab and box. From a search of this forum some are using accordian type flexible seals which will allow the cab to move, others seem to be bolting the two directly together.

How are the accordian seals working, and how does bolting them together work? Do you disable the air ride on the cab?

Thanks in advance.

Chuck D
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Old 06-09-2009, 07:22 PM   #2
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Chuck, cool to see more truck conversion work in Minnesota! My rig was built with the air ride cab delete (truck was ordered from Freightliner to be built as a motorhome so it never had air ride cab). The box (living quarters) is bolted to the frame solid. There is a rubber accordian between the cab and the l/q. Even with both units attached to the frame there is some flex and movement which I believe requires that accordian. I think if you still had an air ride cab the movement would be way too much for an accordian to handle. I think everybody disables the air ride cab and locks it down when building a coach.

I'd love to visit with you while you're making your coach if that's okay. You're welcome to check mine out too if you want. I live in St. Paul but store mine in Hastings. Keep in touch.
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Old 06-10-2009, 05:07 AM   #3
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Has anyone on here left the air ride on the cab (ours has that) and put air ride on the toter box part? It looks easy to do if you buy the same air ride as the cab X 2.
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Old 06-10-2009, 06:04 AM   #4
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Quote:
Originally posted by A.Reed:
Has anyone on here left the air ride on the cab (ours has that) and put air ride on the toter box part? It looks easy to do if you buy the same air ride as the cab X 2.
I have wondered about that as well. If both had air ride, wouldn't the seam between the cab and box need to be structural, in other words, extremely rigid? It would seem to me that there would be a lot of stress in the joint unless completely unified.

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Old 06-10-2009, 03:56 PM   #5
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Quote:
Originally posted by chuck:

How are the accordian seals working, and how does bolting them together work? Do you disable the air ride on the cab?
We have a Freightliner M2 with an air-ride cab. The accordion seal has worked fine for us with the air-ride fully enabled. For more details on one manufacturers seals, see: UniGrip Accordion Seals
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Old 06-11-2009, 03:17 AM   #6
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So Alan (Dr Fun),
Your box at the back is air-ride also?
I take it if it is, the two are bolted together extremely well and no accordian seal?
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Old 06-11-2009, 11:42 AM   #7
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Quote:
Originally posted by A.Reed:
So Alan (Dr Fun),
Your box at the back is air-ride also?
I take it if it is, the two are bolted together extremely well and no accordian seal?
Sorry for the confusion... No, only the cab is air ride. The coach box is rigidly mounted to the frame. There is an accordion seal between the cab and the coach box.
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Old 06-11-2009, 12:05 PM   #8
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Thanks all for the responses, think I am going to go with Alan's technique, maybe I will constrain the cab air ride a bit, with a couple of chains to minimize how much it can move.

Thanks again

Chuck
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Old 06-11-2009, 09:50 PM   #9
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So Alan,
With it done that way, as our cab is air-ride too, three things I'd like to know.

-What is the distance between the cab and the box? (2', 5". ?)

-What is the ride like in the box for people with it bolted down? (air ride suspension all round or leaf?)

-Lastly, is there many if any issues with the accordian cab seal to the box with the movement, as in noise, dust, water getting in, squeaking, etc?

Thanks very much.
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Old 06-12-2009, 04:25 PM   #10
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I can comment on how the ride is in the living quarters when that is bolted solid to the frame. I have air ride on the rear axle. Leaf springs up front. The living quarters ride smoother than on my '92 Allegro class A gasser built on a Chev. P32 motorhome chassis. And that has almost new shocks and springs too. The rear bedroom is much smoother. The cab is rougher on my truck conversion than it is on my Allegro. The cab is not air ride on mine. The two captains chairs are air ride and that does help a bunch. I don't mind the ride knowing that I'm in a truck conversion and not some cushy smooth motorhome.
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