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TakingThe5th's avatar
TakingThe5th
Explorer
Jan 17, 2017

Dexter Axle moved?

When we got back from our trip and parked the Cougar 333MKS we discovered that our X-Chocks would not fit between the curb-side wheels. The street-side X-Chock fit just fine. Odd because the X-chocks were previously interchangeable. These are the smaller style x-chock with the adjuster nut on top and a handle at the bottom.

My inspection did not reveal a problem. Everything was tight and nothing appeared to have moved. Tires were good but the street-side rear tire was worn more then the others.

I took the 5er to a well-regarded frame shop that knows RVs. They checked parallel axle alignment and found the left side short. (5200 lb Dexter axles, MorRyde CRE 3000) They also found worn out plastic spring bushings at the bracket end of both rear springs. They replaced the worn bushings and moved the spare up to the left rear. I also had them pack the bearings and adjust the brakes. The rig has 12,000 miles on it.

When I went to pick up the rig I checked wheel clearance with the X-chock and it appears that the clearance between the street-side wheels has not changed. I talked to the manager and left the rig there for more investigation. I asked about possible structural problems and there are none, that was all checked out.

Any thoughts on this appreciated. I can't understand how the axles can be parallel yet the clearance between the wheels is different, especially when rims and tires are all the same.

27 Replies

  • You had a couple of plastic bushings worn out? The ones on the spring hangar end? If that is correct, it is not normal for those to wear out first. I have ALWAYS had the equalizer bushings wear out first. This makes sense as the equalizer carries a lot more load. Did the shop check them all? In any case, I don't get to concerned about the measurement between the tires as it is constantly changing. Now other things such as one tire wearing bad etc. will get my attention.
  • Have any of the spring shackles 'Flipped'

    Right one in picture has flipped
  • Old-Biscuit wrote:
    Just for clarification........


    When you park do you have to sharpy maneuver your 5th wheel?

    OR

    Is parking straight back ?in or pull in?


    Tight , sharp maneuvering with 'jack' axles/tires cockeyed until you pull straight


    Yes, we know cockeyed wheels. We have a tight 90 degree turn completely on blacktop backing onto a 200 foot driveway. At the end of the driveway is another sharp 90 degree turn onto a newer mostly level gravel 80 foot pad but wheel stress is much less. I have tried using the X-chock on both the blacktop and the gravel after "unloading" the stress on the wheels. Whatever has happened seems to be "permanent".

    When I tried the X-chock at the shop the rig was sitting on a gravel parking lot that was very icy and therefore very low on friction and pretty level. Had the same result there too.
  • ScottG wrote:
    As the wheels travel up and down, even a little, the distance between them changes. The ground is probably just a little off level or not perfectly smooth.
    So what you found is entirely normal.
    I've found I have to make minor adjustments to my X chocks some times.


    Good point, but we have moved the rig around and still have the same issue. I was expecting the measurements to change, no?
  • Just for clarification........


    When you park do you have to sharpy maneuver your 5th wheel?

    OR

    Is parking straight back ?in or pull in?


    Tight , sharp maneuvering with 'jack' axles/tires cockeyed until you pull straight
  • When you finished "parking" the Cougar, did you stop as you were backing up? If so, try pulling forward just a few inches, before you unhook. I have seen this do the trick.
  • As the wheels travel up and down, even a little, the distance between them changes. The ground is probably just a little off level or not perfectly smooth.
    So what you found is entirely normal.
    I've found I have to make minor adjustments to my X chocks some times.