Reply
 
Thread Tools Display Modes
Old 09-23-2015, 08:46 AM   #11
Member
 
Join Date: Jun 2012
Posts: 45
"The uninflated air springs are capable of supporting the weight of the axle when the vehicle is lifted by the frame."
That makes no sense. The air bags are between the axle and the frame. The suspension supports the axle when the frame is lifted. If the air bags are to short to allow the full extension of the suspension when the frame is lifted that is really poor design.
I never deflate my air bags. Of course I don't lift the rear wheels off the ground either, almost sometimes, but never all the way off.
__________________

__________________
Bob and Joy
2013 Sunseeker 3010DS
rhumbert is offline   Reply With Quote
Old 09-23-2015, 09:03 AM   #12
Senior Member
 
Join Date: Jul 2013
Location: Baton Rouge
Posts: 492
Quote:
Originally Posted by rhumbert View Post
That makes no sense. The air bags are between the axle and the frame. The suspension supports the axle when the frame is lifted. If the air bags are to short to allow the full extension of the suspension when the frame is lifted that is really poor design.
I never deflate my air bags. Of course I don't lift the rear wheels off the ground either, almost sometimes, but never all the way off.
The air bags are designed to hold pressure with weight. You take the weight off of the bag and the pressure inside the bag can cause the bag to expand and stress. Without pressure in the bag the bag basically becomes a rubber bushing.
This would be a concern when the axle is lifted off the ground.
I dump my air but I use the Air Lift WirelessAir system which dumps and refills the bags with a push of a button. One of the best upgrades I've done.
__________________

__________________
bgilly is offline   Reply With Quote
Old 09-23-2015, 09:16 AM   #13
Member
 
Join Date: Jun 2012
Posts: 45
Exactly, If they can't take the stress it's a bad design. Make them bigger, thicker etc.
When you lift the frame from the suspension the pressure in the bag decreases (not being squashed anymore) so it should be able to handle it. I'd like to get an air lift system to adjust the ride on the fly, but can't justify the ridiculous cost for a $30 pump, some tubing and a controller.
__________________
Bob and Joy
2013 Sunseeker 3010DS
rhumbert is offline   Reply With Quote
Old 09-23-2015, 09:43 AM   #14
Senior Member
 
Join Date: Jul 2013
Location: Baton Rouge
Posts: 492
Quote:
Originally Posted by rhumbert View Post
Exactly, If they can't take the stress it's a bad design. Make them bigger, thicker etc.

That's an argument you will have to bring to Firestone. The air bags are designed to assist with loads. Most vehicles with air bags rarely get the chassis lifted off the ground with the axle hanging. RV's with hydraulic levelers are the ones that could have this as a regular occurrence.

The OP asked if it was required to bleed the air and I submitted the information from the owners manual to support that you do.
To maintain my Firestone lifetime warranty I abide by the manual.
__________________
bgilly is offline   Reply With Quote
Old 09-23-2015, 10:24 AM   #15
Member
 
Join Date: Jun 2012
Posts: 45
When they make a statement that says they support the weight of the axle it makes me wonder if the writer is competent at all.
"The uninflated air springs are capable of supporting the weight of the axle when the vehicle is lifted by the frame."
And that's why I believe the manufacturer made them to withstand the lift and we don't hear complaints about failed bags from lifting the frame without dumping the air.
__________________
Bob and Joy
2013 Sunseeker 3010DS
rhumbert is offline   Reply With Quote
Old 09-23-2015, 02:06 PM   #16
Senior Member
 
Boso's Avatar
 
Join Date: Dec 2014
Posts: 1,198
If I was to lift the Rv off of the ground in rear I would also deflate. I could only see this happening for a repair of some type,but not a routine thing just to satisfy warranty
__________________
i2015 sunseeker 3050s. 2007 saturn aura
Boso is offline   Reply With Quote
Old 09-23-2015, 08:50 PM   #17
Senior Member
 
Join Date: Feb 2014
Location: Ontario
Posts: 1,141
Quote:
Originally Posted by Boso View Post
No you don't do that do not bleed air off airbags diesel coaches has air suspension so you bleed the air so you don't have to extend levelers so high would almost be to high for some people to get to that lower step when you start diesel you let it build air and you can see your gauge if not your tires can scrape fenders on incline or bumps or turning complete different system. Most have there own compressor system with air hose and all. Mine pumped to 150psi i didn't move coach until it had built up to 100psi and would be increasing as I was moving
Boso, What PSI are you inflating your air bags too, If I am not mistaken it is 100 PSI max, or am I wrong.
__________________
2014 Forester 3051s
2016 Nissan Pathfinder SL
2012 Sonic toad
wana65stang is offline   Reply With Quote
Old 09-23-2015, 09:05 PM   #18
Senior Member
 
Boso's Avatar
 
Join Date: Dec 2014
Posts: 1,198
No you are right I was at 80 for my high 75 is what I try for now but I'm not sure how long that pressure last it is never too close to what I started at when I leave whether it's a few days or a week. But mine feels good starting at 75psi. Will be replacing the entire system in October or so I think at this time, did get a approval any way.i was talking earlier about diesel pusher on a freightliner raised rail chassis sorry for any confusion
__________________
i2015 sunseeker 3050s. 2007 saturn aura
Boso is offline   Reply With Quote
Old 09-23-2015, 09:36 PM   #19
Senior Member
 
Join Date: Feb 2015
Location: Kaysville, Utah
Posts: 153
I have an aftermarket manifold and compressor system I added to my 3171. I dump the air before I level the coach. If I don't then as soon as the jacks hit the ground the compressor kicks on and starts filling the bags with more pressure (I don't get the physics of this btw). I am worried if I let them fill back up to normal operating pressure then they would get damaged or certainly damaged once the jacks came back up.

Before I got the auto air system I never dumped them before leveling.
__________________
steverkemp is offline   Reply With Quote
Old 10-03-2015, 07:43 AM   #20
Junior Member
 
Join Date: Jul 2015
Location: Louisiana
Posts: 21
Thanks for all the input. It is now a moot point, as we discovered the Big Foot doesn't work at all. Lights flash, nothing happens. I had our local mobile RV repair look at it, and he couldn't find the problem without taking it to his shop and putting on the the lift, so we'll see if we want to spend the money. So, what are the best leveling blocks for a class C?
__________________

__________________
blue daze is offline   Reply With Quote
Reply

Tags
airbags

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:31 PM.