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Old 09-15-2023, 10:50 AM   #1
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Join Date: Feb 2023
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Spartan K2 chassis air bag dump distance

It appears that my question is perhaps not important to most as I cannot locate any discussion on it. So here goes:

How many inches of downward vertical travel is available when dumping the airbags on a Spartan K2 chassis [43XX DutchStar.] In other words, when the airbags are inflated to design position and then the air is dumped, how many inches of downward travel will the coach experience?

For reference, I have searched Spartan websites as well and am coming up empty. Could have missed the details...who knows.

update: I did locate a reference in a HWH document indicating 5-1/2" to 6-1/2".

"Most air bags will have some device such as a cone that keeps the air bag from being crushed or damaged when fully deflated. Inflating air bags is limited to the available air pressure to the suspension system. This is why the relief setting of the engine air compressor should not be changed. How much lift the air bags will have varies with vehicles and air bags, but the average lift the air bags will supply, when maximum available system air pressure is used, is between 5 and 6 inches from a totally deflated state."

Given this new information can anyone confirm this?

Appreciate feedback in advance.
Dave G.
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Old 09-15-2023, 10:59 AM   #2
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Location: Powell River, B.C.
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I don't know what the " ride height " amount of rise is on a Spartan chassis but my Freightliner is 3 1/2 ".

Perhaps it's a terminology issue , your looking for the drop amount and any posts would list the measurement as a rise from air suspension deflated .

I'll see what I can search out .

EDIT: This thread ; post 13 ; gives measurements of 4 " front and 2.3/2.8. rear for a Mountain master chassis.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 09-17-2023, 08:50 PM   #3
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Yes, air springs have a 1.5" bump block inside to stop the coach weight from damaging them when deflated.
Skips link is right for my 1999 Spartan MM GT chassis with Reyco-Granning IFS and rear AR 240 suspension.
Normal ride-height is controlled by air valves with adjustable linkage to the chassis.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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air, chassis, spartan

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