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02-12-2008, 07:05 PM
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#1
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Junior Member
Join Date: Feb 2008
Posts: 4
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I need help with a problem maybe one of you have an answer for me. Is it possible to dump the air in order to lower the coach so that the satellite dish will clear the RV Barn door opening. I have been told that when you dump the airbag it activates the automatic leveling system and that the bus can not be driven. Thanks for any help.
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02-12-2008, 07:05 PM
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#2
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Junior Member
Join Date: Feb 2008
Posts: 4
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I need help with a problem maybe one of you have an answer for me. Is it possible to dump the air in order to lower the coach so that the satellite dish will clear the RV Barn door opening. I have been told that when you dump the airbag it activates the automatic leveling system and that the bus can not be driven. Thanks for any help.
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02-12-2008, 07:06 PM
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#3
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Junior Member
Join Date: Feb 2008
Posts: 4
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I forgot to mention it is an allegro bus.
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02-12-2008, 07:22 PM
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#4
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Senior Member
Freightliner Owners Club
Join Date: Mar 2002
Location: Western WA
Posts: 1,294
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It depends on how your air system is configured. Most are capable of being dumped. Cautions: Driveline angle may be critical and do not turn the steering wheel while moving because there will probably be no wheel well clearance for the tires to turn without damaging the coach body.
__________________
Sold the Motorhome, joined the fully retired gang. '07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X, Blue Ox, Aventa
US Gear UBS
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02-12-2008, 07:42 PM
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#5
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Junior Member
Join Date: Feb 2008
Posts: 4
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Thank you, I did know about not turning the wheel. I just need to clear the barn door and planned on being straight. Any Allegro bus owners that may have an answer for me? Thanks agin Fleetman.
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02-13-2008, 05:37 AM
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#6
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Moderator Emeritus
Join Date: Oct 2002
Location: Sheboygan, WI
Posts: 5,642
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Your 42QRP is equipped with the HWH 625 series auto-leveling system. Normally if you press the Auto button, the air bags will drain and after a short wait, the jacks will come down and auto level the coach. When you press the Store button, the jacks retract and the air bags fill.
However, there is also a Dump button on your HWH controller. If you press this button your air bags will dump without bringing the jacks down. When this happens the coach will squat down on the frame and you will have a lower overall height. This will change your driveline angle but not appreciably. If you are just backing into a stall you'll be fine. The main thing to remember is to line the coach up perfectly with your garage stall before dumping the air. Tiffin doesn't have a whole lot of clearance between the fenderwell openings and the tires. If you try to turn the wheels when the bags are dumped you'll be rubbing those tires on the fiberglass and you'll be missing some paint at the least or fixing some fiberglass at the worst.
In order to refill your air bags simply press the Store button again. Even though your jacks are up, this will send the Dump/Fill solenoid valve to the Fill position so that your bags can reinflate.
__________________
Mark & Leann Quasius
2016 Cornerstone 45A
2020 Jeep Gladiator Rubicon
2021 Jeep Wrangler Rubicon
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02-15-2008, 09:33 AM
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#7
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Senior Member
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,775
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O
I'm just curious how you got the MH into the barn? Did you install the dome in the barn?
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
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02-15-2008, 09:36 AM
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#8
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Senior Member
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,775
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O
You could also let about half the air out of the tires to lower the overall height of the vehicle as truckers sometimes do to go under bridges/obstructions.
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
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02-20-2008, 05:02 AM
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#9
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Senior Member
Join Date: Jan 2006
Location: Signal Mtn TN
Posts: 126
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I seem to recall a FL rep saying that the air bags would begin inflating it the transmission was shifted from neutral to drive, even if the Store button had not been pressed. I suppose the same would apply to reverse. How long it takes them to raise the coach is the question -- if you dumped air just before the SAT dish entered the barn, would you have enough time to complete entry? Maybe you could experiment with an observer at hand...
__________________
Steve B.
05 Journey 36G CAT C7
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02-20-2008, 06:22 AM
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#10
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Senior Member
Join Date: Oct 2006
Location: Manteca, Ca
Posts: 1,373
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Why take a chance...modify the barn a one time safe fix.
__________________
"Piddln"
2008 Jeep Sahara '4Dr"
Ronnie Bledsoe
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02-20-2008, 06:33 AM
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#11
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Senior Member
Workhorse Chassis Owner Triple E Owners Club
Join Date: Nov 2004
Location: Williams Lake,BC Canada
Posts: 1,230
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I had a simular problem and simple dug out two trenches for the tires- dropped the coach 6 inches.
Make sure you have the clearance under the coach with the air out. Or simply dig out the floor.
__________________
2020 Triple E Wonder RTB
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07-30-2008, 04:21 PM
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#12
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Junior Member
Join Date: Jul 2008
Location: port allen la.
Posts: 12
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I had the same problem with a 42 QRP. I raised my door header height by 6" instead of lowering the air...I thought this might be a problem down the road... Buy the way, the length is longer than the spec. also. I have to fold my mirrors back to close my roll-up door.
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