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Old 11-15-2018, 04:37 PM   #1
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HWH air leveling and slides

After winterization, I leveled the coach (air dumped). I now want to deploy the slides in order to do some inside winter prep. According to the operator's manual, "IMPORTANT: Do not operate the room extension unless the vehicle is at the proper ride height and the leveling jacks are retracted. If the vehicle is equipped with HWH air leveling, the vehicle should be level before operating the room." Our coach has air leveling and I find these instructions confusing.



Does this mean I have start the engine to air up first to ride height (whether or not I have air leveling) before operating the slides? Can you level without dumping the air and doesn't the air eventually purge after a few days?



I put a call into HWH this morning but have not received a call back.
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Old 11-15-2018, 05:41 PM   #2
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HWH air leveling and slides

Seems like regardless of what everyoneís instructions state, Iíve always looked at it from a logical standpoint. If the box is level, the slides have a better chance of going straight in and straight out. If the box isnít level, the slides may have a chance to slightly slide towards the front or the back of the hole theyíre sitting in. Whether this is actually true or not, dunno, but seems logical it could happen. That said, I always plant the jacks before sending the slides out and always bring the slides in before raising the jacks. We have HWH jacks. Have done this since weíve owned this coach...our first one. Hope this helps.
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Old 11-15-2018, 07:15 PM   #3
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Dumping air is not the same as ride height or air leveling. We operate slides in/out at ride height and then air level or hydraulic level.
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Old 11-15-2018, 08:29 PM   #4
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What does your manual say? Ours says to level coach, then run slides out. I air level from ride height. I would just start the coach raise to ride height and then level and run the slides out. When your done just bring the slides in and then air dump.
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Old 11-15-2018, 08:34 PM   #5
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My CC manual says to level first (HWH air level only) then deploy slides.
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Old 11-15-2018, 08:45 PM   #6
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Air leveling....oops.....guess thatís not jacks.
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Old 11-16-2018, 04:10 AM   #7
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Slides are installed when the frame is level in the factory.

Jacks are installed when the frame is upside down (at some manufacturers).

It seems Jacks are the most forgiving based on this.

So - the logical thing has to be to level first - then operate the slides.
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Old 11-16-2018, 05:26 AM   #8
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Folks, thanks for your replies.

I think that one thing we can all agree on is to level the MH prior to operating the slides. I always did this with the Dutch Star which had jacks. Les.warden probably stated it best.

Boiling it all down, I guess my question becomes, "Is there something special or necessary about being at ride height before you operate the slides?" Recall that the coach is already level.
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Old 11-16-2018, 08:53 AM   #9
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I would think as long as your level it would be ok to operate your slides.
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Old 11-16-2018, 10:24 AM   #10
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Like BigD stated and thinking logically again, it would seem if youíre level 5 inches, 5 feet, or 5 miles off the ground, level is level. I think thatís the key.
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Old 11-16-2018, 03:19 PM   #11
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I was able to get in touch with Paul (AZPETE here on iRV2) who works for HWH. He pointed out that, although I had consulted the HWH operator's manual, the manufacturer's manual trumps. This makes sense because HWH makes slide-out mechanisms for many different RV manufacturers with many models and thus there are several configurations of slide-out mechanisms in use. HWH can put out a general operator's manual, but not a "one size fits all" manual.


I just checked the thick Beaver owner manual's section on slide-outs. It states in bold type, "Note: Perform the slide-out room operation with the air suspension system full." End of confusion. I will air up the suspension before operating the slides, although running the engine with a shut down after 10 minutes or so is not optimal. Just curious as to what the engineering rationale is to air up the suspension prior to operating slides.
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