Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-08-2008, 11:30 AM   #1
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
Question Power side to side leveling idea

I've read that using mechanical leveling aids is a bad-frame flex inducing idea. However, given that I'm in the planning stages of a complete rebuild on my '61 which would allow me to modify the frame for mounting points and strengthening I'm keen to scope out a few crazy ideas.

I was wondering whether anyone had tried power lifting units actually mounted close to the axles on the chassis. I was looking at the product below and thought that if it were mounted between my axles (twin) that I'd get really easy leveling and greater stability. It appears to be good for towards 6000 lbs at full extension which sounds OK for my planned trailer weight of say 4000 lbs. (not that I'm not envisioning a 26' trailer suspended in mid air!). The cost is about $600, so nothing too out there.

The lifter has a sort of trailing arm that makes it look really sturdy and I would imagine that it would create a more stable unit than the tires/suspension/shock on their own. (I know a truck full of 2 x 6's is cheap but on a long multi stop trip something slick may be worthwhile).

I don't want to start adding weight to the trailer so early on in my design process but maybe I could nix the four scissor style traditional stabilizing jacks in lieu, any thoughts?

http://www.ultra-fab.com/new_detail....gnum=39-941705
Attached Images
 
__________________

__________________
1960 Sovereign 33' Pacific Railroad Custom
truckasaurus is offline   Reply With Quote
Old 10-08-2008, 01:08 PM   #2
Rivet Master
 
guy99's Avatar
 
1984 31' Airstream310
Dunsmuir , California
Join Date: May 2004
Posts: 1,336
Images: 16
I don't own a trailer, but it seems like this device might help with lateral leveling, you would still need stabilizers. On our MH with levelers, if I just extend the leveler(s) on the low corner(s) the MH will bounce around as we move about. Extending the other levelers so that they just 'kiss' the ground reduces this quite a bit.
__________________

__________________
If you want others to be happy, practice compassion.
If you want to be happy, practice compassion - The Dalai Lama

1984 310 Limited Motorhome
Courtesy Parking (W/S/E/Wi-Fi) on I-5 in Northern California, 70 miles from Oregon border
guy99 is offline   Reply With Quote
Old 10-08-2008, 02:01 PM   #3
Rivet Master
 
87MH's Avatar
 
1978 31' Sovereign
Texas Airstream Harbor , Zavalla, in the Deep East Texas Piney Woods on Lake Sam Rayburn
Join Date: Jan 2003
Posts: 2,435
Images: 292
You mean something like this???

Quote:
Originally Posted by truckasaurus View Post
I was wondering whether anyone had tried power lifting units actually mounted close to the axles on the chassis.
The Connector Beam spanning the two axles consists of two 2" X 2" pieces of square tubing welded together and is actually welded to the bracket extensions of the Dexter Axles. I went with a Dexter #11 axle cut down to a 3600 lb rating per axle. The #11 axle is a much more robust design than the original Henschen, and the way the spreader beam is mounted the torque tube itself sees no appreciable weight. The #11 axles also gave me the opportunity to use the Dexter "Never-Lube" bearings - these bearings are some stout.



Below is a side view with a hydraulic jack in operation. The round socket used as a jack point stabilizer is actually a floor flange for a 2" pipe. These flanges prevent the jacks from slipping off of the spreader beam. I have a pair of 12 volt electric jacks which I could utilize to lift the rig, but the hydraulics are actually quicker to deploy.




The main reason I installed these was to take the pressure off of the rubber in the axles during storage, thus extending the normal life of the axles. Of course, the hydraulics also level from side to side.

More info here:http://www.airforums.com/forums/f219...ign-14737.html

I ran some numbers before installing the lifting beam...a single 2" X 2" piece of tubing was no where near strong enough, but, considering the length I had to span, by doubling the tubes I increased the strength by almost 4 times.




You will still require the stabilizers at the outboard corners of the trailer to prevent "shake" as people and pets move around in the interior.
__________________
Dennis

"Suck it up, spend the bucks, do it right the first time."

WBCCI # 1113
AirForums #1737

Trailer '78 31' Sovereign

Living Large at an Airstream Park on the Largest Lake Totally Contained in Texas
Texas Airstream Harbor, Inc.
87MH is offline   Reply With Quote
Old 10-08-2008, 04:15 PM   #4
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,809
Images: 12
The first question I have is do you have clearance under the trailer between the axles. My water tank is there and extends below the frame so it would require a lift kit to mount this system.

Second I might see this holding 6,000 lbs fully extended but I doubt very much if it could support half of the when the feet first contact the ground. The 2 beams holding the screw jacks would just buckle in the center if not supported by the floor of the trailer, something you could not do with the belly pan.

A couple of blocks of wood to drive up on is a lot cheaper and much more secure.

However I do like the jack and flange idea, with safety jacks, for changing tires and working under the trailer
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 10-08-2008, 05:55 PM   #5
2 Rivet Member
 
2007 19' Safari SE
La Center , Washington
Join Date: Jan 2008
Posts: 74
There is an SOB fiberglass trailer called the Oliver, that comes factory equipped with a 3 point leveling system. It's pretty neat. I think the website is olivertraveltrailers.com - Home of the Oliver Legacy.
__________________
longdog is offline   Reply With Quote
Old 10-08-2008, 06:00 PM   #6
2 Rivet Member
 
2007 19' Safari SE
La Center , Washington
Join Date: Jan 2008
Posts: 74
wait... I didn't type that URL... strange.
__________________
longdog is offline   Reply With Quote
Old 10-08-2008, 06:43 PM   #7
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
I love this site. The same manufacturer as the product I mentioned makes another item that looks like it would work the same way as the Oliver trailer 3 point system; and I can even see how I might mount it, avoiding water tanks etc. Dennis your solution and trailer look great, thanks for the link to your thread.

I don't have a firm location for the tanks yet so I can fit them around the jacks, I would also be able to adapt the chassis to take the additional forces involved just so long as the jacks themselves are up to the task. I'm not sure about the clearance issue yet but I think I'll try and get some more info on these products and go from there. I think such a simple means of leveling would be great on a really long trip.
__________________
1960 Sovereign 33' Pacific Railroad Custom
truckasaurus is offline   Reply With Quote
Old 10-08-2008, 07:40 PM   #8
2 Rivet Member
 
2007 19' Safari SE
La Center , Washington
Join Date: Jan 2008
Posts: 74
When you get your 3 point leveler worked out, mind if you let me know how? Thanks.
__________________
longdog is offline   Reply With Quote
Old 10-08-2008, 10:51 PM   #9
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
Quote:
Originally Posted by truckasaurus View Post
I've read that using mechanical leveling aids is a bad-frame flex inducing idea. However, given that I'm in the planning stages of a complete rebuild on my '61 which would allow me to modify the frame for mounting points and strengthening I'm keen to scope out a few crazy ideas.

I was wondering whether anyone had tried power lifting units actually mounted close to the axles on the chassis. I was looking at the product below and thought that if it were mounted between my axles (twin) that I'd get really easy leveling and greater stability. It appears to be good for towards 6000 lbs at full extension which sounds OK for my planned trailer weight of say 4000 lbs. (not that I'm not envisioning a 26' trailer suspended in mid air!). The cost is about $600, so nothing too out there.

The lifter has a sort of trailing arm that makes it look really sturdy and I would imagine that it would create a more stable unit than the tires/suspension/shock on their own. (I know a truck full of 2 x 6's is cheap but on a long multi stop trip something slick may be worthwhile).

I don't want to start adding weight to the trailer so early on in my design process but maybe I could nix the four scissor style traditional stabilizing jacks in lieu, any thoughts?

Ultra-Fab Products, Inc.|Manufacturer and Supplier of RV Accessories & Industrial Lift Assists
Check the weight of the Ultra Fab levelers. I was going to use them on a project, and quickly returned them for the reason that they were extremely heavy. If you check the shipping weight, you should get the idea. A pair of them made my Suburban droop in teh rear suspension....not good if trailer weight is a concern.
Instead, i went with individual BAL powered stabilizers.
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 10-09-2008, 11:38 PM   #10
RLS
Rivet Master
 
RLS's Avatar

 
2004 25' Classic
Prescott , Arizona
Join Date: Jul 2008
Posts: 608
Just came across this electric jack while surfing. It only weighs 23lbs. lifts 3.5 tons and has a range of 12". Might be something to consider ??? No more blocks, just slide it under and raise her up, maybe??
CSA-US 12v InstaJACK Electric Scissor Jack w/ optional InstaWrench - Jack - Trailer - Auto - Trailer - The Garage Store

Bob
__________________
RLS is offline   Reply With Quote
Old 10-10-2008, 08:50 AM   #11
Rivet Master
 
HowieE's Avatar
 
1991 34' Excella
Princeton , New Jersey
Join Date: Aug 2003
Posts: 6,809
Images: 12
Quote:
Originally Posted by RLS View Post
Just came across this electric jack while surfing. It only weighs 23lbs. lifts 3.5 tons and has a range of 12". Might be something to consider ??? No more blocks, just slide it under and raise her up, maybe??
CSA-US 12v InstaJACK Electric Scissor Jack w/ optional InstaWrench - Jack - Trailer - Auto - Trailer - The Garage Store

Bob
A correction. The jack is said to lift cars up to 3 1/2 tons. That is not the same as lifting 3 1/2 tons. The video shows the jack lifting one corner of the car. This jack would have trouble lifting one side of any Airstream.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles

HowieE is offline   Reply With Quote
Old 10-10-2008, 10:14 AM   #12
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
I've had a quick look at the weights of some of these things, they seem to start at 108 lbs for the type in the first post. Quite a bit, but at least it would be in a good location for tow handling I suppose. I'm also assuming that I'd install them to be at near maximum extension, say 4" of extension to go, to make full use of their power curve. Then I'd slip a wider footplate, and a block if needed, underneath when in location for the final leveling.

Anyhow still just an idea, ironically I still like the manual tongue jacks for the simple clean look, weird....
__________________
1960 Sovereign 33' Pacific Railroad Custom
truckasaurus is offline   Reply With Quote
Old 10-10-2008, 11:43 AM   #13
RLS
Rivet Master
 
RLS's Avatar

 
2004 25' Classic
Prescott , Arizona
Join Date: Jul 2008
Posts: 608
Quote:
Originally Posted by HowieE View Post
A correction. The jack is said to lift cars up to 3 1/2 tons. That is not the same as lifting 3 1/2 tons. The video shows the jack lifting one corner of the car. This jack would have trouble lifting one side of any Airstream.
You got me! Good point. OK scratch that idea!

Bob
__________________

__________________
RLS is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Side to Side Leveling gorrissen Jacks, Stabilizers, Lifting and Leveling 26 08-02-2009 08:50 PM
Compare Kipor, Honda, Yamaha quiet generators side by side ShinyTwinkie Generators & Solar Power 17 09-26-2008 10:01 AM
Brake controller side by side comparison Boondocker Brakes & Brake Controllers 4 10-17-2007 01:05 PM
Side to side leveling: can I use the stabilizer jacks? iAirstream Jacks, Stabilizers, Lifting and Leveling 4 08-17-2007 08:33 PM
Side-to-Side Flooring Replacement in Classic MH Eddy Repairing/Replacing Floor &/or Frame 12 11-03-2006 02:08 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.