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Thread: IS installation on LM Augusta

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    Visitor cjbearden's Avatar
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    IS installation on LM Augusta

    We will be at MorRyde May 6-7 for the IS, DB and NL Hubs. Question we have is whether to go with 7,000 lb or upgrade to 8,000 lb axle equivalent? It is our understanding that the higher weight will make for rougher ride of the RV.

    Would appreciate input from others who have already had the IS upgrade, which weight did you go with and how do you like your choice?

    We let our cat ride in the RV when weather is not too hot for her. If we go with 8,000 lb, do you think it will be too rough for her? Are things going to bounce around more so that we have to be even more cautious about how things are stowed for travel?
    Last edited by cjbearden; 05-05-2009 at 05:36 PM. Reason: correction
    C. J. Bearden

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    Fulltime TXBobcat's Avatar
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    Well I don't know if CJ or JD is writing this... So Hi CJ.. JD is always to busy...... yea..
    With your landmark I would ask the service manager at Mor/Ryde but If I had to guess I would take the 8k.

    My Bighorn had 6k axles. I have 7k now and it rides higer and I think better but it has only a 14,800 GVWR. I don't have to worry if my rear end or spare tire is going to drag. I did with the 6k.

    When I get my IS, DB & NL I am having the 7k installed. I am also going to get them to move the front set of tires about 1" forward to get the weight on the trailer balanced a little better. That would take some of the weight of TV. Also I can go to G rated tires and have room between the tires.

    I would go with 8k..
    FWIW
    BC
    Travel safe & may God bless
    Bob Curry & Trevor
    2016 F350 CC SRW LB 4WD
    Ruby Red 08 Bighorn 3400RE #9948
    Mor/Ryde 7k IS, 8k DB * 17.5 Rims w/G114 GY Tires
    Bigfoot Auto Leveling
    Escapee 96030 * Fulltime since 10-08-2007
    Club Member # 1081

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    Visitor cjbearden's Avatar
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    I always value your opinion, BC. We will discuss more with our tech as you say. Good point on the 1" tire movement. Of course, I am writing this and you are very right about J.D. ;-)

    C.J.
    C. J. Bearden

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    Senior Member ct0218's Avatar
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    I have the 8K axles on mine, but have never been in the coach while underway. The first 1500 miles we towed were with the 7K axles and we find that nothing seemed to move around any more with the 8K axles for the last couple thousand miles. I keep 110 psi in the tires also. With the suspension system, and the fact that all four tires will not be hitting potholes, etc., at the same time, I really don't think it will be a problem.

    Clark and Gail Thompson
    2003 GMC 3500 Duramax/Allison, 4x4, CC LB
    2006 Mt Rushmore #2896

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    Visitor cjbearden's Avatar
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    Thank you ct0218 for your input. After the RV was weighed today, we have opted for the 8K IS. About 250 heavy on off-door side of the RV. Of course, that side has the three slides. Slight adjustment will be made to hitch pin and our hitch when finished.

    That 6:00AM knock on the door was not fun (especially since we only got up at 5:32!) But, surprisingly we were dressed and only had to pull in the slides, unhook the electric, hitch up and drive to the street for the measurements.

    Sad part of the story is that we have to now wait until Monday to go back for installation. A couple of parts are needed to complete an 8K set for us. Those parts are built at another site and should be ready for us Monday. Hopefully, we get out of MR Tuesday afternoon.

    Final sad part of our day - got back to Elkhart Campground and were setting up when J.D. realized there was water in the command center, which he traced back to the hot water heater. There was a blown one-way valve and water everywhere, including the underbelly. All water is about drained and/or soaked up now. J.D. was able to catch Jim Fenner at HL to get another valve. Our valve was plastic improperly installed with slip jaw plier and should be brass installed with crescent or regular wrench so that will be an issue for another day. We pray this fixes us until the real deal can be installed. Big thanks to Jim for coming through in our time of need. Returning to RV Capital next Wednesday to address this issue as well as a few others that have cropped up.
    C.J.
    Last edited by cjbearden; 05-07-2009 at 08:11 AM.
    C. J. Bearden

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    Re: IS installation on LM Augusta

    Quote Originally Posted by TXBobcat View Post
    Well I don't know if CJ or JD is writing this... So Hi CJ.. JD is always to busy...... yea..
    With your landmark I would ask the service manager at Mor/Ryde but If I had to guess I would take the 8k.

    My Bighorn had 6k axles. I have 7k now and it rides higer and I think better but it has only a 14,800 GVWR. I don't have to worry if my rear end or spare tire is going to drag. I did with the 6k.

    When I get my IS, DB & NL I am having the 7k installed. I am also going to get them to move the front set of tires about 1" forward to get the weight on the trailer balanced a little better. That would take some of the weight of TV. Also I can go to G rated tires and have room between the tires.

    I would go with 8k..


    FWIW
    BC
    I have a question regarding the IS. If all the weight is supported independently on each side of the frame, what keeps the frame from bending when you hit a pot hole and throwing your tire out of alignment? That is why I thought yours were like mine with an axle connecting them and the axle support welded to the frame. Really curious as to how this holds up. Our Landmark frame is way to light to not have it bend when you hit the first big pot hole unless you have adequate support to the other side of the frame. Just curious and would like to see a photo looking from one wheel to the other under the coach.

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    Fulltime TXBobcat's Avatar
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    Re: IS installation on LM Augusta

    lwmcguir
    I am sending you a PM about your question. However I am also posting the same informtion incase someone is interested in the pictures.

    If you go to my photobucket pictures you can see near the bottom some of the pictures of the frame. They added a steel tubing along the frame to help raise the trailer up for clearance as the tire moves up and down. They told me it would have about a 5" movement. They welded in a large square tubing between the frame side to side, infront and behind the wheels. It added weight to my overall trailer but strengthened the frame all around the suspension. We do have a large tubing from side to side inline with each wheel but it only attaches to the frame. You can see the tubing in the service manual. That is not an axle but is in the place where an axle would go. Each IS is heavy. They are big enough to support 8K and the DB are for 8K. They adjust how much load it holds by adjusting the rubber spring assembly.

    This is how I understand how they work and are supported.

    BC
    Travel safe & may God bless
    Bob Curry & Trevor
    2016 F350 CC SRW LB 4WD
    Ruby Red 08 Bighorn 3400RE #9948
    Mor/Ryde 7k IS, 8k DB * 17.5 Rims w/G114 GY Tires
    Bigfoot Auto Leveling
    Escapee 96030 * Fulltime since 10-08-2007
    Club Member # 1081

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    Re: IS installation on LM Augusta

    Great post as to the installation of the IS system. Explains how the frame can handle the torque on each side with the added metal beams.

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    Re: IS installation on LM Augusta

    How much weight is added with the IS system?
    Lonnie & Trudi
    2009 BH 3670RL

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    Senior Member - Past Moderator Ray LeTourneau's Avatar
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    Re: IS installation on LM Augusta

    Quote Originally Posted by Tankie View Post
    How much weight is added with the IS system?
    Lonnie, it can vary because of the variety of steel needed to install the IS at the right travel height. After calculating our before and after weights, ours was 600#. We did not get the disc brakes. Ours had a 3" rectangular tube riser added to each side of the frame to raise the ride height. Those 2 risers alone were probably 100# combined. Mor-ryde also added a cross member brace to the galley gray water tank.
    I have no regrets. The ride is great, less worries of mechanical failures and alignments are pretty straight forward. (no pun intended)
    Ray & Lin
    R.I.P. Suzi
    R.I.P Bart


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