Maximum airbag pressure and coach height

[lw8000]

Hello all,

I have been looking but have not been able to find this answer yet....
What is the maximum height above the "normal" or "auto" level, that the OEM levelling system should raise the coach? I always thought the system will
normally handle 4 inches down or up from the normal position, but no more. We have a lot of times where being parked at a campground the back of the
coach is lower than the front due to the slope, and I've raised it manually a couple of inches, but wondering just how far I can go up before it's
"too much" or too much pressure on the airbags. We have the standard OEM system with Cinnabar's OEM single airbags. I could ask Cinnabar but figured
it would be more helpful for myself and others here in the forum.

Thanks in advance!
--
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan

 

[dennis sexton]

Chris
Your understanding is correct.
This spreadsheet is noted as not up to date but still has good info.

https://docs.google.com/spreadsheets/d/1GiUiGAgnW4WPnjbnkfe5vDPELhU4A0lHt7qGRXAbC1Q/htmlview?hl=en_US

Dennis

> Hello all,
>
> I have been looking but have not been able to find this answer yet....
> What is the maximum height above the "normal" or "auto" level, that the OEM levelling system should raise the coach? I always thought the system
> will normally handle 4 inches down or up from the normal position, but no more. We have a lot of times where being parked at a campground the back
> of the coach is lower than the front due to the slope, and I've raised it manually a couple of inches, but wondering just how far I can go up before
> it's "too much" or too much pressure on the airbags. We have the standard OEM system with Cinnabar's OEM single airbags. I could ask Cinnabar but
> figured it would be more helpful for myself and others here in the forum.
>
> Thanks in advance!

--
Dennis S
73 Painted Desert 230
Memphis TN Metro

 

[Carl Stouffer]

The upper limit of your rear suspension travel it determined by the shock absorber. You can run your bag pressure up to whatever it takes to get
there, within reasonable limits, of course.

My system has a 140 psi cut off and I routinely raise my rear bags to "full raise", and have been doing so for nine years with the stock bags and with
the Jim K Quadrabags. No problem.
--
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles,
Solar battery charging. GMCSJ and GMCMI member

 

[sandra price]

Good to check.

At Dothan a few years ago, someone parked behind us raised his coach all
the way to the stop. A few minutes later the driver's side air bag
exploded, blowing the "t" several feet away from the coach. Shortly after
that, the rider's side blew, with no damage.

For that reason, my wife won't sit outside anywhere near the rear wheels.
No one was hurt, but they could have been.

Bob Price

> Hello all,
>
> I have been looking but have not been able to find this answer yet....
> What is the maximum height above the "normal" or "auto" level, that the
> OEM levelling system should raise the coach? I always thought the system
> will
> normally handle 4 inches down or up from the normal position, but no
> more. We have a lot of times where being parked at a campground the back
> of the
> coach is lower than the front due to the slope, and I've raised it
> manually a couple of inches, but wondering just how far I can go up before
> it's
> "too much" or too much pressure on the airbags. We have the standard OEM
> system with Cinnabar's OEM single airbags. I could ask Cinnabar but figured
> it would be more helpful for myself and others here in the forum.
>
> Thanks in advance!
> --
> Chris S. -
> 77 Kingsley, 3.70 FD, mostly OEM -
> S.E. Michigan
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[lw8000]

Perfect, thanks everybody, exactly what I was looking for. I guess I'll need to see how far our shocks will travel before bottoming out, maybe by
carefully jacking it up at the bogies and go from there.
--
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan