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04-16-2020, 11:25 AM
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#1
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Senior Member
Alpine Owners Club
Join Date: Jun 2017
Location: Dataw Island SC
Posts: 114
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Can you inflate a low air bag by hand
Inflating air bahs
__________________
Hello In April we purchased 2005 Alpine coach 5258 It a 40ft fd4slide unit pushed by a Cummins 400hp 6c8.9 engine Bought in April 20017 in Charleston Sc
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04-16-2020, 11:31 AM
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#2
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Senior Member
Alpine Owners Club
Join Date: Oct 2019
Location: Hoodsport Wa
Posts: 1,337
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Quote:
Originally Posted by jeflen
Inflating air bahs
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Never done so, but you can air up the wet tank by installing a valve and air coupler and use an air compressor. Is your onboard air compressor down?
__________________
2000 Alpine 36 FDS #74058
04 Jeep Wrangler TJ
"On the road to find out..."
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04-16-2020, 11:46 AM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,246
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I can on my '09 Country Coach, but only because I had HWH install their Active Air system. As part of the system they put in air lines and schrader valves to individual air bags. Before that there was no way to add air to an air bag. If yours are low then perhaps your ride height valves need adjusting or replacing?
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
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04-16-2020, 12:13 PM
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#4
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Senior Member
Join Date: Nov 2005
Posts: 6,455
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….same question...."inflate a low air bag".....meaning the other 3 bags are ok--more information please?
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Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
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04-16-2020, 12:28 PM
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#5
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Senior Member
Alpine Owners Club
Join Date: Jun 2017
Location: Dataw Island SC
Posts: 114
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Quote:
Originally Posted by Old Scout
….same question...."inflate a low air bag".....meaning the other 3 bags are ok--more information please?
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Appears aft left is low when parked and not on jacks. 2005 fdqa
__________________
Hello In April we purchased 2005 Alpine coach 5258 It a 40ft fd4slide unit pushed by a Cummins 400hp 6c8.9 engine Bought in April 20017 in Charleston Sc
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04-16-2020, 12:29 PM
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#6
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Senior Member
Alpine Owners Club
Join Date: Jun 2017
Location: Dataw Island SC
Posts: 114
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Quote:
Originally Posted by Mr_D
I can on my '09 Country Coach, but only because I had HWH install their Active Air system. As part of the system they put in air lines and schrader valves to individual air bags. Before that there was no way to add air to an air bag. If yours are low then perhaps your ride height valves need adjusting or replacing?
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Please tell my about ride height valves
__________________
Hello In April we purchased 2005 Alpine coach 5258 It a 40ft fd4slide unit pushed by a Cummins 400hp 6c8.9 engine Bought in April 20017 in Charleston Sc
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04-16-2020, 01:19 PM
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#7
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Senior Member
Join Date: Nov 2005
Posts: 6,455
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….as mentioned, individual air bag height is managed by individual ride height valves on each corner. Proper height is determined by a combination of factory specs and distribution of weight on each corner....Most, but not all, Alpines "suffer" from some amount of air leak-down over time, so if air bags are inflated, jacks are up, and engine is not running, some degree of tilt or sag will eventually occur.....there is extensive information on this forum about air leaks and ride height adjustment….
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Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
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04-16-2020, 05:25 PM
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#8
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Senior Member
Alpine Owners Club
Join Date: Jun 2017
Location: Dataw Island SC
Posts: 114
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Thank you sir where might find the data to do this
__________________
Hello In April we purchased 2005 Alpine coach 5258 It a 40ft fd4slide unit pushed by a Cummins 400hp 6c8.9 engine Bought in April 20017 in Charleston Sc
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04-16-2020, 05:51 PM
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#9
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Senior Member
Join Date: Nov 2005
Posts: 6,455
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...start by using the IRV2 search feature above to see what has already been written on this forum....try the search string "f104/ride heights"... I will post the ride height specs shortly but the search will provide you with specific instructions for how to measure between the axles and the frame to apply the specs.....
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Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
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04-16-2020, 05:57 PM
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#10
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Senior Member
Join Date: Nov 2005
Posts: 6,455
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...front axle height is 10 5/16 + or- 1/8 inch.....7 1/2 for rear axle [example: measured from bottom of frame to weld seam on the middle of the axle] …..front axle measurement process is similar but more complicated to execute.....
PS--these specs get you in the ball-park but I am a firm believer in getting a 4-corner weight done so you can use this info to fine-tune the ride heights...
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Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
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04-16-2020, 06:28 PM
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#11
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Senior Member
Alpine Owners Club
Join Date: Oct 2019
Location: Hoodsport Wa
Posts: 1,337
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Our air bags will bleed down in about two weeks, and yes the LR is the first one noticeable. I just dump the air and keep it on the jacks long term now. If the coach is low on one corner when roading then yes, a leveling valve adjustment may be in order provided your four corner weights are reasonable. Good information provided by OldScout is correct.
Active air would be a nice upgrade I suppose, but air loss over time is not an indacation of a problem. Even with active air unless you start the coach every week it's going to sag eventually. That's what the stabilizer jacks are for, correct?
__________________
2000 Alpine 36 FDS #74058
04 Jeep Wrangler TJ
"On the road to find out..."
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