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  • Another trailer coulper question

    Trailer couplers are thin and strong which leads me to think they may be a bit harder material.

    I read the thread where some use bolts and most weld.

    I have a coupler lock where a ball is inserted in the ball space and a U bold is pushed down through the extended sides of it. Its yellow so you guys have probably seen them.

    I haven't settled on what I'll use, this came with the trailer. I watched a video where this lock was easily defeated with a pry bar by prying the U bolt over the hump.

    So would welding a short bent piece of 1/2" round on the hump above the ball weaken anything critical? If not it would prevent prying that U bolt over it.

    Below is the type of lock but the weld will be over the ball area on the coupler.
    Attached Files

  • #2
    Originally posted by Hardrock40 View Post
    Trailer couplers are thin and strong which leads me to think they may be a bit harder material.

    I read the thread where some use bolts and most weld.

    I have a coupler lock where a ball is inserted in the ball space and a U bold is pushed down through the extended sides of it. Its yellow so you guys have probably seen them.

    I haven't settled on what I'll use, this came with the trailer. I watched a video where this lock was easily defeated with a pry bar by prying the U bolt over the hump.

    So would welding a short bent piece of 1/2" round on the hump above the ball weaken anything critical? If not it would prevent prying that U bolt over it.

    Below is the type of lock but the weld will be over the ball area on the coupler.
    I would not hesitate to weld something to a coupler like you are describing.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

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    • #3
      I use a piece of schedule 40 pipe with two chains attached [top and bottom] to slide over coupler end and lock around tongue. Cheap but it's something. Battery grinder and cutting wheel will cut through almost anything.

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      • #4
        Would it be hard to build either a 2", 2 1/2" or 3" square tube slip out tongue held in place by a slip bolt with a covered lock like on a gang box.

        Remove the hitch and weld a plate across the top and bottom of the rails and weld a SQ tube receiver to it.
        Last edited by tackit; 04-08-2013, 08:55 AM.

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        • #5
          I have thought about a removable coupler and know some who cut the tongue off and reinstall it when in use. Don't want to do that just yet.

          My idea was crap. I have this one lock pick I keep around just in case. When I went out this morning to weld a piece in the way so that thing would pry over the hump, my key wouldn't open the lock.

          Turns out it wasn't on right and the latch was in a bind. However, I got out the pick and with no effort it fell off. I'm not good at lock picking. Just a simple master lock can beat me sometimes so this thing is a joke.

          I like the pipe idea, I know you guys have secrets, lets hear some more.
          The video should be here in a few minutes.

          Well trying to change format so it will work try this link.

          http://youtu.be/JJMh3kiqo6o
          Last edited by Hardrock40; 04-08-2013, 09:15 AM.

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          • #6
            something to get things started

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            • #7
              Originally posted by tackit View Post
              something to get things started

              Nice would work on my boat trailer but my enclosed is like V shape.
              Attached Files

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              • #8
                Originally posted by Hardrock40 View Post
                Nice would work on my boat trailer but my enclosed is like V shape.
                Just take off the V ball hitch and cut off the rails far enough back to accommodate a bottom and top plate with the receiver tube. The rail loss can be made up on the length of the slip tongue.

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                • #9
                  That one I'll give some thought, Thanks

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