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Old 12-06-2017, 10:08 AM   #1
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Squatting coach

The "new" Allure squats after a few hours. The right side tag axle airbag had a leak and I replaced it yesterday. Over night it went fully down on the right side and both front bags. Should the coach have stayed up over night with every thing turned off (coach and chassis batteries).
The back left didn't squat at all I knew the right side tag was leaking because you could hear it. Last night, couldn't hear a leak anywhere but it squatted.
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Old 12-06-2017, 10:29 AM   #2
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No, it shouldn't do that. You still have a leak somewhere apparently.
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Old 12-06-2017, 10:49 AM   #3
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If you have an air dryer it will have a purge valve on the bottom. This has a spring in it and can weaken over time and leak air. Take soap and water and spray the purge valve to see if you have a slow leak. It may only leak ever so often it has to build pressure before it will leak. If you have a leak replace the hole airier don't buy the rebuild kit. Sometimes the dir dryer will have an internal crack inside that will bleed air. If you have this can put your ear on the filter and and listen for a air leak. It could be something else too.
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Old 12-06-2017, 11:05 AM   #4
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I have the drier and I know where it is. I will check it. Thanks
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Old 12-06-2017, 12:34 PM   #5
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I checked and it was not the air drier. The back left stayed up! That should be a clue. Why is it separate and what is it separate from? I need one of those listening devices they use to locate a water leak under a slab floor. That will mean getting my son to do the listening. I hear constant noise in my ears!
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Old 12-06-2017, 03:12 PM   #6
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I have the HWH 2000 Levelling/Slide system in my 2007 Allure 470. Here is the service manual for the 2000. There are pneumatic diagrams in the document. Troubleshooting section as well.

It sounds like there is a leak/activity in certain manifolds/ride height valves. I have two ride height (left/right) in the back and one in the front. The pressure switches on the manifolds have failed in some installations (leaks).

Good luck,
Brian
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Old 12-06-2017, 03:54 PM   #7
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Also give your front & rear "6-pack" control solenoids(plus 2 solenoids for the tag) a dose of soapy solution to see if they may be leaking and need to have the "O" rings replaced..
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Old 12-06-2017, 10:04 PM   #8
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you might have two separate leaks at r-r height valve and front height valve.
you can do a diagnosis - find a quiet place; while coach reaches travel height, turn off engine. crawl underneath the rear wheel (plenty of space there), listen to hissing sound. if no such a sound, place a stethoscope to the height valve body. do the same at front valve.

don't forget to check the air port near the rear hitch. although you may not use it, the place that air line meets the quick disconnect is known for leaking.
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Old 12-06-2017, 10:14 PM   #9
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Quote:
Originally Posted by wsmcycle View Post
I hear constant noise in my ears!
I had the same problem, then the DW died. Sure wish I still had the "noise" problem!!!
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Old 12-06-2017, 10:24 PM   #10
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Something doesnít sound right here. Was the HWH leveling system turned on? The front could have been dumping air to compensate as the rear was dropping.
Leaks described thus far would drop the pressure in your tanks, but not your airbags.
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Old 12-06-2017, 10:45 PM   #11
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Quote:
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I had the same problem, then the DW died. Sure wish I still had the "noise" problem!!!
I am sorry for Your loss and it makes me appreciate my hearing problem. I've grown very hard of listening.
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Old 12-07-2017, 06:22 AM   #12
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Had same issue with my 07 Allure. It was an intermittent issue but after the coach sat for a bit, the right rear would leak down. Shop found a leaking pressure switch on the manifold at the rear.

It was HWH part #RAP1720 in my case.
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Old 12-07-2017, 11:18 AM   #13
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I should have been more clear on my earlier post.
The leak has to be somewhere between the manifold and air bag.
One air line comes out of the manifold that feeds the ride height valve. Then a line that comes from the valve to the airbag.
Why your front started to drop after you replaced a rear airbag is the question. I guess itís possible you had two leaks start at the same time, but not very likely.
Keep us posted on what you find out.
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