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  #1  
Old 03-12-2017, 06:24 PM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
Air suspension connection 300SEL

I am designing the air bag mounts for my front suspension and want to duplicate the 300SEL air line routing if possible. does any one have detailed pictures of how the air line exits the bellows? I have seen pictures of the bellows and air line but not on the car.
Thanks
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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #2  
Old 03-12-2017, 11:48 PM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
Got it figured out. it exits in the area under the upper suspension stops. I will post some pics. Still would not mind some pics of the routing as it is near moving suspension parts.
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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #3  
Old 03-13-2017, 01:12 PM
Registered User
 
Join Date: Oct 2012
Posts: 6,382
I took one of these apart once. I needed the steel pipes to replace some that had rusted through on a 6.3.

Some of these were very short in length and would be impossible to bend, at least for me, unless I had a pattern.

I remember thinking if I ever had to do this and didn't have a donor car I would have some steel braded hoses made up that were the same length as the rusted out steel ones. Yeah, they would not be original, but they would likely last better than the ones the car came with.

But before I would do this I would need to know the working pressure of the system. I don't.

Can anyone answer that question?
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  #4  
Old 03-13-2017, 06:44 PM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
Good idea with the braided hoses where they might get rubbed by moving parts. Then transition to the air brake tubing. The goal would be to have no interference to start with but the tubing will be very close to the upper control arms.
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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #5  
Old 03-17-2017, 07:15 PM
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Join Date: Apr 2009
Location: Los Angeles (Altadena)
Posts: 1,400
Quote:
Originally Posted by Idle View Post
But before I would do this I would need to know the working pressure of the system. I don't.

Can anyone answer that question?
I think it's 150 psi.
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  #6  
Old 03-18-2017, 05:54 PM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
I got my front mounts built. I will take some pics soon.
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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #7  
Old 03-21-2017, 12:06 AM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
here's a few pics. I used 5" OD tubing so the mount would fit snugly in the spring pocket. I welded some bolts on to keep the mount from shifting/rattling and to give the tubing a solid base. The washers create a 3 point mounting surface so the mount does not rock. I located the bag to the outside as far as possible by offsetting the mount and mounting pad on the control arm. I am going to sleeve the air line with transmission cooler tubing to protect it where it comes out of the mount and under the control arm.
Attached Thumbnails
Air suspension connection 300SEL-img_2975.jpg   Air suspension connection 300SEL-img_2981.jpg   Air suspension connection 300SEL-img_2982.jpg   Air suspension connection 300SEL-img_2972.jpg   Air suspension connection 300SEL-img_2984.jpg  

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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #8  
Old 03-21-2017, 12:16 AM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
A few more pics. The outer washer is notched so the tube is slightly canted to the outside.
Attached Thumbnails
Air suspension connection 300SEL-img_2964.jpg   Air suspension connection 300SEL-img_2969.jpg   Air suspension connection 300SEL-img_2974.jpg   Air suspension connection 300SEL-img_2979.jpg   Air suspension connection 300SEL-img_2987.jpg  

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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
Reply With Quote
  #9  
Old 04-18-2017, 12:07 AM
Tony
 
Join Date: Oct 2005
Location: Nevada City, Ca
Posts: 852
It's been sitting on the bags for a week now without going down after fixing a few leaks in the fittings. Goal is to get it on it's wheels so I can load it on a trailer.
I'm just using air valves for now-no management system yet.
Just pushing it up and down feels much less "springy"and bouncy-even without shocks. Front took 60pis-rear 80psi but no engine or gas in the tank.
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Tony H
1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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