Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 10-09-2016, 11:08 AM   #1
Senior Member
tiredvet's Avatar
Join Date: Dec 2011
Posts: 406
Front and Rear Axle ride height Adjustment

I down loaded a copy of the illustration from the Alpine coach library. For me I would like to hear from those of you that have done this.I would like to know the correct steps to raise or lower the airbag.Reading the illustration it says to use a 7/16" wrench to loosen the nuts on Both control valves and adjust the airbags to the correct ride height.On the illustration there is a line from this statement to a third nut? I could use a little more clarity on the correct steps to take for lowering or inflating the airbag.By loosening 3 nuts to adjust an airbag, well for me I could use a few more steps explaining the exact way to inflate or release the air from the airbag.I understand that the rig needs to be on level ground aired up and what location to measure from on both axles. I'm just not clear on the wrenching aspect on the illustration.

Jim & Elissa Edmonds
2003 34FDDS Alpine Banks 430hp #74869
Viola, Idaho 3rd Armored Cav & 3rd Infantry Division
tiredvet is online now   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-09-2016, 01:22 PM   #2
Senior Member
Join Date: Oct 2014
Posts: 595
Here is what I used-- come in two different lengths. Very easy and infinitely adjustable vs the OE fixed length rods with minimal adjustment on the valve itself:


Brett Wolfe
2003 Alpine 38FDDS
wolfe10 is online now   Reply With Quote
Old 10-09-2016, 05:04 PM   #3
Senior Member
Old Scout's Avatar
Join Date: Nov 2005
Posts: 4,296
Jim, sorry but there is just not that much more to it. There are two height valves on each axle. There is one "adjustment" nut on each valve for a total of 4--don't know anything about/never seen a "third nut". Each nut is located on a bolt, that slides inside a slot in the valve's adjustment arm. You adjust one nut at a time--always forget whether moving the arm up or down in relation to the nut raised or lowers bag--but will be obvious once you attempt the adjustment--air rushes into bag is raising it; air rushes out, bag is lowered.

Rear axle is easy to gauge height based on measuring 7.5" from frame bottom to middle of weld seam across the axle. Front axle is more difficult as you need to secure a straight-edge to the top of axle to get a horizontal reference to measure the 10.31" [10 5/16]. May have to recheck first valve once the second valve on other side of axle has been adjusted.

For years, this is where I stopped the process--"assuming" that once heights were in spec, the weight distro was proper/balanced--wrong! Reference this and other recent posts, you need to continue with fine-tuning the heights if you what to balance the actual 4-corner weights. Repeated fine adjustments on a segmented scale with wide margins will eventually allow you to get the axles within 100-200lbs without substantially changing the height specs......Again, reconciling the cross-corner, front to back, weight differences is the most challenging part of the "fine-tuning" process....
PS--could see where buying the adjustable, threaded connecting rods suggested by Brett, could make the adjustment effort more precise.
Old Scout
2003 40' MDTS
Garden Ridge, Texas
Old Scout is online now   Reply With Quote
Old 10-09-2016, 07:25 PM   #4
Senior Member
tiredvet's Avatar
Join Date: Dec 2011
Posts: 406
I crawled under the coach for a good look at the front control valve and could make out the function of the valve. The diagram just left me wondering.Thanks guys.
Jim & Elissa Edmonds
2003 34FDDS Alpine Banks 430hp #74869
Viola, Idaho 3rd Armored Cav & 3rd Infantry Division
tiredvet is online now   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
02 Monaco Dynasty Front axle ride height problems bfam2008 Roadmaster Motorhome Chassis Forum 18 02-27-2017 12:39 PM
Why 1 ride height valve on front but 2 in rear? sc3283 Monaco Owner's Forum 18 09-04-2012 02:13 PM
Measuring ride height at front axle tmitchell Spartan Motorhome Chassis Forum 9 08-30-2007 06:32 AM
Ride Height Adjustment on Spartan Chassis timz61 Newmar Owner's Forum 9 07-29-2006 07:08 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:00 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.