1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

Extendable hitches on dog trailers

Discussion in 'Trailers' started by Scrub Puller, Jan 14, 2013.

  1. Scrub Puller

    Scrub Puller Senior Member

    Joined:
    Mar 29, 2009
    Messages:
    3,480
    Location:
    Gladstone Queensland Australia
    Yair . . . can anyone point me to where I can find pictures and description of the extendable hitch system as used (I think) in California?

    I'm sure I saw something here on HEF but it does not come up on search.


    Cheers
     
  2. mitch504

    mitch504 Senior Member

    Joined:
    Feb 27, 2010
    Messages:
    4,297
    Location:
    Andrews SC
    Try "pup trailer".

    Maybe you being an "old dog" yourself, you didn't think of pups. :D
     
  3. The Learner

    The Learner Well-Known Member

    Joined:
    Jul 22, 2012
    Messages:
    197
    Occupation:
    Hydraulic specialist
    Location:
    SE Victoria Australia
    nothing about pups here in Australia mitch
    they're too big to be pups ;)
     
  4. Hendrik

    Hendrik Senior Member

    Joined:
    Mar 6, 2009
    Messages:
    1,232
    Location:
    Adelaide South Australia
  5. Swamp rat

    Swamp rat Well-Known Member

    Joined:
    Apr 17, 2009
    Messages:
    114
    Location:
    La / Ga
    Scrubpuller - are talking about a hitch such as a receiver tube that will allow the tongue to extend longer for backing and such, or possibally a pinned fold-away for storage?
     
  6. leachrod

    leachrod Well-Known Member

    Joined:
    Dec 20, 2012
    Messages:
    67
    Occupation:
    grader operations
    Location:
    wichita ks
    We have a truck set up for pup trailer with the eye hitch. .Doesn't fold away but is not in the way. bolts on and has several different hole position to set at the height you want. Also use this type on my low boy
     
  7. Knocker of rock

    Knocker of rock Well-Known Member

    Joined:
    Jun 10, 2012
    Messages:
    248
    Location:
    US Western Cordilleran seismic zone
  8. Scrub Puller

    Scrub Puller Senior Member

    Joined:
    Mar 29, 2009
    Messages:
    3,480
    Location:
    Gladstone Queensland Australia
    Yair . . . I think the trailers are set up with an air system on the hitch that allows the hitch to extend and drop the trailer back further behind the truck. . . something to do with bridge regulations, possibly only in certain areas or certain routes.

    I've seen a thread or article somewhere . . . one bloke even complained the trailer was so far back cars tried to pass and merge between truck and trailer!

    Cheers.
     
  9. leachrod

    leachrod Well-Known Member

    Joined:
    Dec 20, 2012
    Messages:
    67
    Occupation:
    grader operations
    Location:
    wichita ks
    We run long pony trailers that are long enough to jacknife and, dump truck load over trailer extension
     
  10. truckdoctor

    truckdoctor Well-Known Member

    Joined:
    Nov 15, 2010
    Messages:
    145
    Occupation:
    mechanic
    Location:
    reno nevada
    Are you looking at log trailers? If you are it is called a reach. The last one I worked on was a square tube tongue inside of a larger square tube on the top of the suspension. The lock if you want to call it that was just a piece of angle iron with two guides to hold it in place in the tube. There was a large threaded bolt that pushed the angle iron against the tongue to hold it in place while it was being loaded and unloaded off the truck. The cables and the logs kept the reach from sliding out while loaded.
     
  11. tireman

    tireman Senior Member

    Joined:
    Apr 19, 2011
    Messages:
    264
    Location:
    St.Louis,Mo.
    Scrub Puller it sounds to me like you are describing the set up that is used on our West Coast for dumps and pups. I lived in Tacoma, Wa. in the 90's and saw these every day. They are just as you described them. Lemme search around and see if I can find a pic or something.
     
  12. tireman

    tireman Senior Member

    Joined:
    Apr 19, 2011
    Messages:
    264
    Location:
    St.Louis,Mo.
  13. hvy 1ton

    hvy 1ton Senior Member

    Joined:
    Jul 24, 2006
    Messages:
    1,652
    Location:
    Lawrence, KS
  14. The Learner

    The Learner Well-Known Member

    Joined:
    Jul 22, 2012
    Messages:
    197
    Occupation:
    Hydraulic specialist
    Location:
    SE Victoria Australia
    scrub puller curious to know what type of trailer and what size?

    for example i know of a few high volume tipping quad dogs with extendable draw bars so that they run under length on the road but do not need to be unhitched to unload the high volume truck body

    and as for your long drawbar it could of been one of these
    PM-0212-feature-cartage-australia-630.png
     
    Last edited: Jan 16, 2013
  15. Scrub Puller

    Scrub Puller Senior Member

    Joined:
    Mar 29, 2009
    Messages:
    3,480
    Location:
    Gladstone Queensland Australia
    Yair . . . Thanks tireman and hvy 1ton. It looks like we're on the right track.

    Now can anyone tell me the exact purpose of this system and how it is used . . . and when?

    The Learner I was talking to a US ex-trucker some years back and he was telling me about a system where on the highway you could let the trailer hang way back . . . like forty feet or so.

    They had to be shortened up to go through towns. Just normal trailers size wise as far as I know. some of our US Friends on here might chip in . . . it could even be an antiquated law that no longer applies, I reckon I'm thinking eight or ten years back.

    Yeah mate I understand the function of the extendable hitch on the Hi-vol bodies. . . interesting the Americans call draw-bars or hitches "tongues".

    Cheers

    Cheers.
     
  16. Dualie

    Dualie Senior Member

    Joined:
    Feb 24, 2007
    Messages:
    1,371
    Location:
    Nor Cal
    I think the trucker was talking about sliding axles not drawbars. you can slide the tandem axles back to the rear of the trailer or forward as much as 10'+. Useful to equal out the axle weights between the truck with the 5th wheel plate and the trailer. Also to abide by kingpin to rear axle length laws.
     
  17. hvy 1ton

    hvy 1ton Senior Member

    Joined:
    Jul 24, 2006
    Messages:
    1,652
    Location:
    Lawrence, KS
    I remember typing this out, maybe i never actually posted it. The only reason for sliding hitches is bridge law. When loaded the drawbar is extended to meet axle spacing requirements. When empty the drawbar is retracted to make the setup a little more manageable. I imagine they only bother playing with the drawbar on longer hauls.
     
  18. Andrew_D

    Andrew_D Senior Member

    Joined:
    Oct 20, 2012
    Messages:
    297
    Location:
    Newdale, Manitoba, Canada
    You can also see extendable tongues on the US trucks up here in Manitoba. We don't have bridge laws, but we do have max length laws. So they have to shorten the tongue when they cross into Canada and lengthen it when they enter back into the US. Mostly A-train grain haulers that I have seen.

    Andrew