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Wednesday, January 24, 2007

Axle Equalizer Safety Alert

Did you know you are supposed to grease your leaf spring equalizer assembly every six months? I know my 5th wheel well and while I’m traveling I visually inspect my rig every time I stop. I look at the tires, the 5th wheel hitch, the exterior of the rig and I even glance under the rig. At a rest stop just north of Bakersfield, California I made such an inspection and didn’t notice anything unusual. I always look at the gap between the tires and they were fine. After I arrived at Edwards Air Force Base Family Camp I noticed that my street-side tires were only about ½ inch apart. This top photo is normal, the next photo shows the tires too close together.














I immediately crawled under my 5th wheel and saw this:
This is a typical double eye leaf spring equalizer. The retaining bolt had literally cut down the center of this piece and eventually broke the equalizer. The springs are up against the frame holding up the 5th wheel.It had been like this for some time since there was rust on part of the material that was cut.
It is very difficult to see this from a glance because the metal housing that holds the equalizer blocks the view of a casual visual inspection. Notice that this set-up has a “wet bolt kit” meaning it has grease fittings that lubricate the leaf spring equalizer assembly - when you service them that is.It is recommended that these be serviced (read more grease added) every six months. Unfortunately for me, I had no idea that the grease fittings were even there let alone that I was supposed to grease them every six months. The eyes where the bolts insert into the equalizer are lined with brass sleeves. These sleeves had long been warn away. Here is a comparison between the old and new equalizers. I replaced both equalizers today and am glad I did even though on visual inspection the curb-side (the one that didn’t break) looked fine. After removal and closer inspection this equalizer was beginning to crack and would have eventually broken as well. This could have caused a catastrophic accident. So you can bet I will be servicing these leaf spring equalizer assemblies every six months from now on. There are also grease fittings on the ends of the leaf spring assembly that also require 6 month servicing. I know most of you knew this already, but for those of you who, like me, didn't have a clue about this - now is your chance to get an inspection and a correction. Keep an eye on your rig and by all means be safe out there! Jim

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6 Comments:

  • Jim,

    Just read a referral to your safety tip on axle equalizers. Wow, great site (now in my fav's file).

    Question: Obviously the new equalizer has a grease fitting in the housing. The new bolt also has a zerk in the head. Why the dual lube points? Am I missing something?

    Steve

    By Anonymous stevecmo, at January 27, 2007 6:33:00 AM PST  

  • Steve,
    Yes the equalizer has a grease fitting in the housing, however, the pivot bolt does not have a grease fitting. I'm guessing the engineers decided they wanted the full thickness of the bolt for this critical pivot point. Jim

    By Blogger Jim Twamley, at January 27, 2007 10:14:00 AM PST  

  • Jim,
    Thank you for publishing this info. I'm sure very few 5th wheel owners know about this lube point.I will be forwarding your EXCELLENT photos and documentation to all my fellow RVer's who own trailers and 5th wheels that are tandem axles.Many serious accidents will probably be avoided thanks to you taking the time to post this. Sincerely, Roy Zant BC Canada

    By Anonymous Anonymous, at February 10, 2007 7:53:00 AM PST  

  • Great News on the wheels, I need to get under my Jayco, 5th wheel and have look.

    Thanks,

    Willy

    By Anonymous Anonymous, at February 10, 2007 10:04:00 AM PST  

  • Hi Jim,
    My wife and I made a trip from Colorado to Florida last year with our 30' fifth wheel. Like you I am always checking the rig on the road and before every trip no mater how short. When We returned to Colorado I rotated the tires and greased the hubs but did not see the zerks that you pointed out. The dealer did not make us aware of this when we bought the trailer nor can I find any information in the paper work we wer given. The information and time you spent making trailer owners aware of this is greately appreciated. This information not only protects the RVer but also driving public. Thanks again and happy RVing. Don

    By Anonymous Anonymous, at February 11, 2007 6:08:00 AM PST  

  • Thanks for this info Jim..you can be sure I will be getting underneath my rig first thing tomorow! "Alpenliter"

    By Anonymous Anonymous, at February 12, 2007 1:49:00 AM PST  

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