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Thread: Axle Springs

  1. Print this Post   #1
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    Axle Springs

    Can someone please tell me if I have a potential problem or not?

    I was under my 5'er last week repairing the underbelly that started sagging in the middle. After I was done with that job, I started to look at the rest of the under carriage.

    My attention was drawn to the the springs on both axles. It looks to be very little arch in the springs almost level/straight.

    Does someone know how much of an arch the springs should have? Or a way of measuring them?

    Just wondering if I should be nervous or not. I have never seen leaf springs with such little arch in them.

    Thanks for the thoughts.

    By the way I called Heartland and asked about this. I was told there was no historical problem noted with these springs and that I may want to have a dealer check it out. I could also call Lippert which I plan to do, but they are closed till the am.


    Before I do all of that I want to be sure there is a problem first.
    2011 Sundance 3300CK - Picked-up 8/7/10
    2013 GMC Sierra Denalli Crewcab Dually Duramax

    Ryan, Marsha and Alyssa and Emily

    "Opportunity is missed by most people because it is dressed in overalls and looks like work" ~ Thomas Edison ~

  2. Print this Post   #2
    Perfict Senior Member westxsrt10's Avatar
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    Re: Axle Springs

    I have a differiant model Sundance but I have approx. 1 1/2'- 2" of arch in my springs while disconnect from my TV. (landing gear planted takes about 500lbs off the springs).
    09 Sundance XLT 287RL, (SOLD and missed)
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    Past South Carolina Chapter Leader SouthernNights's Avatar
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    Re: Axle Springs

    Larry and Samantha
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  4. Print this Post   #4
    Moderator jimtoo's Avatar
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    Re: Axle Springs

    Before you get to far along you need to get your trailer weighed as it is now, not after you unload your toys and drain your tanks. Get you axle weights (for each axle) from an approved scale before you jump to conclusions. Then you can start the process of contacting your dealer and or Lippert. You can do nothing with out axle weights, and if low,, then pictures will be needed.
    Jim and Bette
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  5. Print this Post   #5
    Senior Member caissiel's Avatar
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    Re: Axle Springs

    I replaced the 4 springs on my trailer for noting. The new 7000 pair springs were exactly the same ack as the old ones. They are build with strait No5 and No6 Plies.

    When the springs are loaded there is a small backward arc on my springs

    In the Pic the new spring is on top with a flat center section

    HPIM7752.jpg
    Barbara and Laurent, Retired teacher and maintenance/engineering,Full Timing
    Mods: Hydraulic selector valves, Queen bed, heavier front closet rod, W/D door swing changed, 2" rear hitch. 2" pin box hitch.Added build in water filter, Replaced HW Tank Fittings. Modified 2 ceiling vents. Relocated shocks to 60deg. 9/16" U-bolts and spring plates.Center 7500 lbs Scissor Stabilizer Jacks. Hawkshead TPMS. Reinforced kitchen sink supports.More supports and longer rails to couch drawer. Modified bedroom steps for storage. Modified landing gear jacks, etc.
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  6. Print this Post   #6
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    Re: Axle Springs

    here is a pic of my spring. they all look the same. Just wondering if the arch is what it should be.

    Spring3.jpg
    2011 Sundance 3300CK - Picked-up 8/7/10
    2013 GMC Sierra Denalli Crewcab Dually Duramax

    Ryan, Marsha and Alyssa and Emily

    "Opportunity is missed by most people because it is dressed in overalls and looks like work" ~ Thomas Edison ~

  7. Print this Post   #7
    Prolifically Gabby Member JohnDar's Avatar
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    Re: Axle Springs

    Compared with mine, it looks OK. Mine are 2+ years old. Some of the rigs with problems had spring sets that looked more like "W's". It is important that you periodically check the torque on the U-bolt nuts (65 ft-lbs). If they loosen up, you're in deep doo-doo.

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  8. Print this Post   #8
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    Re: Axle Springs

    Quote Originally Posted by Ryanjb01 View Post
    here is a pic of my spring. they all look the same. Just wondering if the arch is what it should be.

    Spring3.jpg
    Use a straight edge laid eye to eye, measure to the spring plate. Should be around 1.75 inches. Yours look good to me.

  9. Print this Post   #9
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    Re: Axle Springs

    OK. Stand down red alert. I thought my last trailer had much more arch. I will check the bolts and keep an eye on the suspension.

    Thanks,
    2011 Sundance 3300CK - Picked-up 8/7/10
    2013 GMC Sierra Denalli Crewcab Dually Duramax

    Ryan, Marsha and Alyssa and Emily

    "Opportunity is missed by most people because it is dressed in overalls and looks like work" ~ Thomas Edison ~

  10. Print this Post   #10
    Have Camera Will Travel JASMAR's Avatar
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    Re: Axle Springs

    We do not take Delivery of our Sundance 2800RL until Monday, December 20th, but here is a picture of our springs with the trailer unloaded. So this is how it look with no load.

    Tom
    springs 2.jpg
    Tom and Lorraine Chinn
    Sacramento, California
    Hometown: North Platte, Nebraska
    2011 Heartland Sundance 2800
    2010 GMC Sierra 2500HD Diesel





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