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Old 03-12-2014, 11:07 PM   #1
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Working Under Your Coach

Our coach has air suspension and HWH hydraulic levelers. I need to do some inspection and possibly some repair work under the motor home. Looking for ideas on how to do it safely. I don't need general advice (i.e., use jack stands or grease pit), but I would geatly appreciate specific information and ideas.

Thanks in advance.
DonL
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Old 03-13-2014, 02:04 AM   #2
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Don...When I work under mine, like changing oil and lubing the chassis, I make sure the coach is fully aired up. Sometimes I may put the jacks down, but often, they get in the way when moving around under the coach.

I have some old 10" x 10" x 12" tall wooden blocks I keep in my side yard. I slide those under the body in a couple of places at the rear. They are just tall enough that if I hit an air dump valve the coach will not drop low enough to pin me. A good support under the hitch will also keep the coach from falling.

My new coach is really low at the axles compared to my prior coach. I have to run the rear of the new coach up on 4" tall blocks to get under it.
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Old 03-13-2014, 02:21 AM   #3
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I leave the suspention aired up and lower the jacks for redundent prevention from getting squished. Save your cardboard, I find its easyer to slide on cardboard than use a creeper.
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Old 03-13-2014, 08:43 AM   #4
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Quote:
Originally Posted by DonL View Post
Our coach has air suspension and HWH hydraulic levelers. I need to do some inspection and possibly some repair work under the motor home. Looking for ideas on how to do it safely. I don't need general advice (i.e., use jack stands or grease pit), but I would geatly appreciate specific information and ideas.

Thanks in advance.
DonL
Use jack stands or some other failsafe incase the bags deflate for some reason.

Really, if you want advice more specific than that, maybe provide the specifics on your coach and if someone else ahs the same model and year, they can tell you about the poison spikes that deploy in certain areas of the undercarriage.
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Old 03-13-2014, 12:01 PM   #5
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I built (4) ramps so that all rear tires are supported. I also use them for my car & p/u repair needs. Even with the air bags deflated I can easily move around underneath. I'm not able to crawl under without the ramps.
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Old 03-13-2014, 02:24 PM   #6
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Drop the Hydraulic levers and work on the rig. Hyd are very safe. That is why they are used. I
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Old 03-13-2014, 02:41 PM   #7
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Quote:
Originally Posted by Dutch Star Don View Post
Don...When I work under mine, like changing oil and lubing the chassis, I make sure the coach is fully aired up. Sometimes I may put the jacks down, but often, they get in the way when moving around under the coach.

I have some old 10" x 10" x 12" tall wooden blocks I keep in my side yard. I slide those under the body in a couple of places at the rear. They are just tall enough that if I hit an air dump valve the coach will not drop low enough to pin me. A good support under the hitch will also keep the coach from falling.

My new coach is really low at the axles compared to my prior coach. I have to run the rear of the new coach up on 4" tall blocks to get under it.
I've also noticed my coach makes my clothing fit tighter ... weird
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Old 03-13-2014, 02:55 PM   #8
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Quote:
Originally Posted by DonL View Post
Our coach has air suspension and HWH hydraulic levelers. I need to do some inspection and possibly some repair work under the motor home. Looking for ideas on how to do it safely. I don't need general advice (i.e., use jack stands or grease pit), but I would geatly appreciate specific information and ideas.

Thanks in advance.
DonL
Actually, it depends on your coach (and you). I'm not small by any means but I can slide under my coach without "airing up" and work on nearly anything ... including changing oil and filters. Give it a try before jacks/etc. I don't use a creeper ... just a tarp or cardboard. Once I'm past the lower edge of the cargo hatch, it's roomier.
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Old 03-13-2014, 03:25 PM   #9
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I'm a fatty, but I could get under my Monaco without too much trouble when it was aired up. My new Freightliner chassis is a different story. I'm going to have to hire a skinny kid to get to the air dryer on the Freightliner.
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Old 03-13-2014, 03:33 PM   #10
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I was advised by a service tech at Freightliner to never get under your coach without jack stands (12 ton) in place. He said he had witnessed an air bag failure, and the coach fell abruptly, not slowly! I always use jack stands now. I think everyone should. JMHO.
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Old 03-13-2014, 03:47 PM   #11
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I'm a fatty, but I could get under my Monaco without too much trouble when it was aired up. My new Freightliner chassis is a different story. I'm going to have to hire a skinny kid to get to the air dryer on the Freightliner.
Yes ... I was kidding of course ... I have noted the need for people that look like Gumby to work under the current models
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Old 03-13-2014, 04:51 PM   #12
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Quote:
Originally Posted by nctox View Post
I was advised by a service tech at Freightliner to never get under your coach without jack stands (12 ton) in place. He said he had witnessed an air bag failure, and the coach fell abruptly, not slowly! I always use jack stands now. I think everyone should. JMHO.
Talked to Fleetwood and Monaco techs. They all use jack stands. I use a set of 22 ton stands from Summitt Racing. Can't be to safe.
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Old 03-13-2014, 04:58 PM   #13
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Talked to Fleetwood and Monaco techs. They all use jack stands. I use a set of 22 ton stands from Summitt Racing. Can't be to safe.

Something like this?

http://www.summitracing.com/search/p...k-stand/22-ton

Where do you position them, thanks.
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Old 03-13-2014, 05:11 PM   #14
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I take mine to the local repair company that specializes in school buses.
They are a Freightliner & Cummins authorized service center. They
lift the bus with a jack at each tire position till it is 5+feet in the
air. We then can inspect everything underneath, make necessary
repairs, do corrosion control, etc. In this way it is safe, and you have
complete access to every component.
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