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Old 10-14-2020, 01:58 PM   #761
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Originally Posted by Magnet18 View Post
Brad,

I'll need to look at it again and think it through, not a mechanical engineer, but I thought it looked like you still get some spring action, since the axle is constrained against rotating when it goes up and down, if I'm picturing it right in my head, which I may not be
The more I think about it you're probably right.

It might be that if they are even side to side they are OK. I would imagine driving with flat bags and hitting a pothole might mess one of them up pretty bad though
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Old 10-14-2020, 02:40 PM   #762
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Mine had a 5/8 shim on the curb side spring. Also you are only cutting off 6 to 7 " of the spring. I was using the weight on the rear axle, almost 9,000 Lbs. for selecting the springs, wrong move! Having removed the 2 springs the ride is about right now. The HD springs also are thicker! I'm also in the top hole of the down straps the spring beam bolts to!

Some where I had seen, that if you do not have air in the bags, Max speed should only be 45 mph! Also have herd of broken air bag spring beams, would bet due to driving without air in the bags!

Do not get the spring number in the photo!

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Old 10-14-2020, 04:50 PM   #763
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Chris, ok, so what you are saying is that the springs need to be within specs in case of an airbag/air system failure. The 45mph speed limit after failed bags would really only apply if the springs were in good condition. Besides damage to the frame and/or Airbag frame (transverse rod) the tag axle (if present) would also take a major beating and probably get destroyed
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Old 10-14-2020, 05:54 PM   #764
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Originally Posted by PeterH-Airstreamer View Post
The company to get the parts is no longer ACE or ACS, its Superide now
559-441-1460
Bushings 7572-102 ~$14 ea
Straddle Pins 5506-001 ~23 ea



https://www.airforums.com/forums/f15...ml#post2369270
Nancy there was very nice, and $125 later my 4 pieces of plastic and 2 pins are in the mail...

That's 50% more than I paid for 4 timken bearings... But for what sounds like a 2 person company that can't decide on a name, I guess I'm just glad they're still in business 30 years later

They do have a website by the way
https://superide1.com/index.html
And they put superide in the invoice
But they answer the phone american carrier system
\_(ツ)_/

Good diagrams on website at least
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Old 10-14-2020, 06:05 PM   #765
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Quote:
Originally Posted by Magnet18 View Post
Nancy there was very nice, and $125 later my 4 pieces of plastic and 2 pins are in the mail...

That's 50% more than I paid for 4 timken bearings... But for what sounds like a 2 person company that can't decide on a name, I guess I'm just glad they're still in business 30 years later

They do have a website by the way
https://superide1.com/index.html
And they put superide in the invoice
But they answer the phone american carrier system
\_(ツ)_/

Good diagrams on website at least



We just lucked out that they are using the same bushings and pins on their new systems...
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Old 10-14-2020, 07:19 PM   #766
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Originally Posted by PeterH-Airstreamer View Post
We just lucked out that they are using the same bushings and pins on their new systems...
I only saw a couple systems on their website, the manuals and diagrams definitely looked 80s era

I think I could order a whole new system for my airstream and it would be on stock, identical to what I've got now

If it ain't broke I guess
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Old 10-14-2020, 07:29 PM   #767
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Im also looking at springs since the PO seems to have driven with flat airbags for undetermined period of time. The generator side spring is bent down and the whole thing leans about 1.5 degrees. Springs must be more than just a pivot point, right is bent and left still slightly upright curve

If you figure out the correct part number for spring, I will be purchasing at soon for the 270 MH
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Old 10-14-2020, 08:42 PM   #768
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Originally Posted by Kvsterling View Post
I’m also looking at springs since the PO seems to have driven with flat airbags for undetermined period of time. The generator side spring is bent down and the whole thing leans about 1.5 degrees. Springs must be more than just a pivot point, right is bent and left still slightly upright curve

If you figure out the correct part number for spring, I will be purchasing at soon for the 270 MH
I did measure the spring pack, between 4 and 4.25 inches

I looked more, and I think the forces are balanced between the front half of the spring, and the rear half of the airbags. If the bag was mounted right to the axle, the spring would do nothing, but the spring isn't really cut in half, the airbags mount towards the end of the spring, essentially replacing the rear shackle. What percentage of the force goes each way will depend on the mechanical impedance (link) of the bags vs springs, so the springs do take some load. Then when the bags fail they get the **** kicked out of them, because the empty bag allows the whole body to come up and the drop down on its bump stop, putting a huge shock on the system.

When working properly, the bags should absorb the high frequency components, and the springs the lower frequency, I think.

That's my theory anyway. 2 engineering degrees, but neither mechanical, so take it for what you paid for it. No warranty express or implied.
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Old 10-14-2020, 09:24 PM   #769
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I would say your right on the money Rob!
Just an Old Tool and Die maker agreeing with you!

Does yours have the 5/8" shim under the springs on the curb side?
From your photo, it don't look like it.
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Old 10-14-2020, 09:52 PM   #770
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Now for the right replacement part number...

These springs are 9/1 leaves, and I can't find a part for that listed for a P-30, it jumps from 8/1 to 10/1

Since the rear half is getting cut, only the front length measurement matters. I found these, and they seem to match all measurements perfectly. So I think airstream used a pickup truck spring. Looking really close at Chris' pictures above, the profile of leaf lengths on the back of the spring looks like it might have been longer too, it's different than the 26" of the new one next to it. Plus the weight rating is a bit higher than the 10 leaf anyway. Guess I'll take the plunge and report on how they fit.

https://www.sdtrucksprings.com/index...oducts_id=1453
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Old 10-14-2020, 09:57 PM   #771
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Originally Posted by cmadmaxman View Post
I would say your right on the money Rob!
Just an Old Tool and Die maker agreeing with you!

Does yours have the 5/8" shim under the springs on the curb side?
From your photo, it don't look like it.
Thanks Chris!
Sure wish I had your tool and die skills, I saw you casually turning your own seal insert tools, jealous


I didn't see any shims on mine. Though maybe I should put one on my driver's side directly under my 180lbs of woodstove and washing machine
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Old 10-15-2020, 09:26 AM   #772
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That's my theory anyway. 2 engineering degrees, but neither mechanical, so take it for what you paid for it. No warranty express or implied.
That's a good analysis and makes sense. I haven't seen the 310 in years so I couldn't remember what the physical relationship was between the springs, the axle and the airbags.

Sounds like you're on the right track

Brad
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Old 10-15-2020, 11:42 AM   #773
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That's a good analysis and makes sense. I haven't seen the 310 in years so I couldn't remember what the physical relationship was between the springs, the axle and the airbags.

Sounds like you're on the right track

Brad
Thanks Brad


Just ordered the springs, part 22-617
https://www.truckspring.com/products...ng-22-617.aspx

and U bolts

https://www.truckspring.com/products...e-361-413.aspx

Still need to find the shackle bolt
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Old 10-15-2020, 12:13 PM   #774
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For working on the road, just ordered a dual-modem mobile router. I think it is outside the consumer tier and is entry level enterprise grade hardware, designed for applications like busses and passenger trains, complete with a service contract.

https://www.mobilemusthave.com/Ultim...dle_p_168.html

It has two cellular receivers, each of which takes two sim cards for 4 sim cards total.
It then picks the two strongest sim cards at any given location and you can set up what's called a speedfusion bonding server between them. For example, if you have decent verizon at 50mbps and decent AT&T at 50mbps, you can bond them and then broadcast a wifi network that will have 100mbps speeds. Then if one cuts out you have redundancy, and speeds might slow back to 50mbps, but won't cut out entirely, and your video call presentation with your bosses bosses boss continues uninterrupted.

more super-user features, such as rejecting close but congested towers in favor of further but less congested ones, access to LTE bands most phones can't access, and so on.

It can also receive a campground wifi signal if there happens to be a good one, and join that with the cell speeds as well.

It also has a GPS receiver, making it a DIY lojack

Been researching this for awhile, excited to try it out.

Totally overkill for probably almost anybody, but it's not just for watching netflix, a rock solid internet connection is required for both of our jobs, so for us $1.5K for a hotspot on steroids plus multiple cell data plans is a necessary expense to get on the road.
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Old 10-15-2020, 02:45 PM   #775
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Looks like that should work Rob. I think AS specked out a lighter spring for a better ride. That is why we have to deal with a negative spring arch!?

Think you balanced out the load!
With the old (heavy) genset, refrigerator, and 125 lbs propane tank on the right side, thinking that is why I had one!? Looked to me it was there from AS.

How is your monthly charges on that system your installing? Inquiring minds want to know
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Old 10-15-2020, 04:21 PM   #776
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Originally Posted by cmadmaxman View Post
Looks like that should work Rob. I think AS specked out a lighter spring for a better ride. That is why we have to deal with a negative spring arch!?

Think you balanced out the load!
With the old (heavy) genset, refrigerator, and 125 lbs propane tank on the right side, thinking that is why I had one!? Looked to me it was there from AS.

How is your monthly charges on that system your installing? Inquiring minds want to know
The service contract and speed bonding server license is $16.50/month

My grandfathered unlimited verizon plan is $65/mo
Just signed up for a 1TB/mo AT&T plan for $140/mo
(You won't find that plan on the AT&T site...)

Those are the primary
As a backup, also have a google Fi sim card that piggybacks off the wife's cell plan, that's $10/gb used, and it will do either t-mobile or sprint

We'll see down the line if we need more data plans added on, hopefully two unlimited plans can do it, usually we use about 300-500gb/mo

None of the unlimited plans are actually unlimited anymore, all have one or another string attached
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Old 10-18-2020, 07:46 PM   #777
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Think I found the right size replacement bolts for the leaf spring shackles

and, I don't think leaf springs are supposed to look like this...


Zinc Yellow-Chromate Plated Hex Head Screw
Grade 8 Steel, 9/16"-12 Thread Size, 4-1/2" Long
91257A774 4

Zinc Yellow-Chromate Plated Grade 8 Steel Washer
for 9/16" Screw Size, 0.594" ID, 1.156" OD
98023A034 1 pack of 25

Top-Lock Distorted-Thread Locknut
Cadmium-Plated High-Strength Steel, Grade C, 9/16"-12 Thread
92501A442 1 pack of 25
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Old 10-18-2020, 07:51 PM   #778
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Brings back memories of last year!

Hang in there, YOU got this!
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Old 10-19-2020, 09:50 AM   #779
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http://www.hwhcorp.com/mr26.html

Putting this here so I don't lose it, I think this is where to get parts for my leaking leveling system
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Old 10-19-2020, 11:52 AM   #780
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At 130lbs each the UPS guy was very glad to be rid of those

Just realized the rear shackle gets welded to the top leaf, but I don't see it on the superide parts list.

Chris, do you remember what you did there? Looks like a generic part I can probably measure and order.
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