Trailer kingpin refurbished

Discussion in 'Trucks [ Eighteen Wheelers ]' started by xsetra, Nov 6, 2016.

  1. xsetra

    xsetra Road Train Member

    Aug 21, 2011
    They weld to the kingpin to add width and then grind it to shape. I have read a few website descriptions. None say how much it cost.

    Anyone have experience with this procedure. It sounds like it should cost less than having the kingpin replaced. My kingpin in welded in place not bolted.
    Thanks for any input.
  2. Ruthless

    Ruthless Road Train Member

    Aug 28, 2010
    The City.
    Prolly depends on what kinda trailer re: cheaper than replacement.

    I never heard of that type of repair. Sounds reasonable that it is done on some equipment tho.
    xsetra Thanks this.
  3. j_martell

    j_martell Light Load Member

    Jun 12, 2014
    Centre Wellington, Ontario
    When i worked at the feed mill, they had a guy come to "rebuild" the king pins on two of the frameless end dumps. He built up layers of weld, then setup this rotating grinder thing...

    The whole rig spun around the king pin while the grinder did its job. The guy would adjust depth and location (up/down on the pin itself). Took most of a day for each trailer.

    I was in getting tires, so i hung around for an hour or two chatting with him. Never asked what it cost, but the mill was kinda "thrifty", so its must have been cheaper than replacing them
    xsetra, W900AOwner and clausland Thank this.
  4. BoxCarKidd

    BoxCarKidd Road Train Member

    Aug 26, 2014
    Would that not be cool! Scares me a lot! How is their insurance? I have cut s cams in half and welded them back together to shorten them, ####### trailers, but thank I'll pass on that one. I am not a metallurgist or an expert on metallography but have had the opportunity to learn from some very knowledgeable people. In such cases there are concerns that the metal can crystallize and fracture. It was already worn, many miles and if it had a fracture heating and cooling wound make it worse.
    It is a two inch pin that holds a 65,000 pound loaded trailer to a 25, 000 pound truck. Do you really want to patch it? I would rather dump it at the auction.
    xcetra: I just thank it is a bad idea. A day with the axle surgean is about $800 so I would expect about the same. You should be able to get a new pin in a flat for less than that.
  5. MACK E-6

    MACK E-6 Moderator Staff Member

    Sep 19, 2005
    Baltimore, MD
    We have Strick trailers that have had the kingpins replaced. On those it's an easy operation, because the frontmost few feet of the trailer floor is a metal plate. You just cut it out and weld in a new one.

    On the Great Danes though, they have wood the full length of the trailer, so that has to be dealt with first before replacing the kingpin on those.
  6. barroll

    barroll Road Train Member

    Nov 23, 2010
    Southwest Michigan
    If the kingpin is worn away the apron is probably on its way out, too. Pin and plate usually only runs about $2000 fabricated and installed.
  7. xsetra

    xsetra Road Train Member

    Aug 21, 2011
    Correct, after closer observation. I measured the thickness of plate by the drain holes that were covered with 4" of rust, grease and dirt. The plate rusted thin from the top side hidden from view, not from the under side being worn.
    barroll Thanks this.
  8. Studebaker Hawk

    Studebaker Hawk Road Train Member

    Oct 18, 2010
    NW Indiana
    I am with the idea of replacing the pin and plate area completely at the same time. Or getting rid of the trailer....
  9. Toomanybikes

    Toomanybikes Road Train Member

    Apr 8, 2009
    There are a couple of Youtube Videos on the process. Same with web sights. Somewhere there I got the notion it runs int $500-$800 dollar range.

    That is the same price ($800) the local KW/Pete dealer has on the board for replacing the kingpin. I am sure the price goes up from their as some trailers are more complex.

    I would have issues with the welded up kingpin. I might do it if I was stuck in a situation with a problem child trailer like a lined reefer, but I would prefer just replacing the kingpin if at all feasibly in the same price range.

    Interestingly, of the things I have seen of critical structural integrity welded up, most welders that claim they can do it fail short in my opinion. Camshafts are a common one I have seen. It is common to hard face weld one under submerged arc and regrind for repair. Well those that do claim they have few failures. Well I seen a lot more then a few.
  10. 6wheeler

    6wheeler Road Train Member

    Aug 30, 2009
    Charlottesville, VA
    Has anyone every had a trailer come off?
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