Pin on third axle

Discussion in 'Heavy Haul Trucking Forum' started by m16ty, Oct 26, 2016.

  1. m16ty

    m16ty Road Train Member

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    I have no allusion that the a pin on would be superior to one in front of the drives. I've driven single axles dumps with tag in the rear and it wasn't ideal. I'm thinking in my situation it may be worth the compromise though. As I said, I'm not going to need it but every once in awhile for short hauls.

    In TN they will let you do a lot of things that are not necessarily by the book under special circumstances. What they absolutely will not compromise on is individual axle weights. Sometimes I need that extra axle to get legal.

    The truck in my avatar is the truck I'm talking about. 1991 Mack RD822SX, 20K front, 65K rears, E9 500hp v8 Mack engine, Mack 12 speed trans, and there is a Spicer 1241p auxiliary sitting in the floor of the shop that's ready to go in.
     
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  3. Razororange

    Razororange Road Train Member

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    I have discussed this several times with my boss for my truck as well.

    My truck is a KW T880 with 46k 60" Tandem and a 20K Steer. I have the length in the frame that we could add a tag axle in front of the drives if necessary. The downside is that instead of a rack we used the extra length to mount tool boxes on either side for all my gear.

    IMG_20160717_151947464.jpg

    If we went with the tag axle I would have to lose those boxes and go back to a normal rack. I'm not to fond of that since the truck we have with a tag on it is a pain to work with because getting up the the rack is not easy or convenient.

    Another reason I've tried to look more into the pin on axle vs a lift is that my empty weight is already more than 25k for the tractor. I don't haul heavy often enough to justify carrying the extra weight of that axle all the time.

    When I do haul anything that heavy it is pretty much always going to be leaving from our local customer going out to a job site or we deadhead out to bring it back.

    Right now our 4 axle is a Pete 379 with 14.5k steer, 20k tag and 40k drives. They only have 53" spacings on the rear though so they do run into permitting issues sometimes from that.

    The goal with me having the additional rear axle would be to haul heavy with our 3 axle flats mostly.

    Haven't done a whole lot of research into this so far though so I'd be interested in any info that you vets have to offer.
     
  4. haulhand

    haulhand Road Train Member

    I did get some pics of one of the units in the yard but I've been stoopid busy pulling a sand can I'll get them posted when I get a down day time to sleep now.
     
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  5. haulhand

    haulhand Road Train Member

    Here is the photos as promised. As you can see it's just bolted to the back of the frame and is most definitely a lift axle.
     

    Attached Files:

  6. johndeere4020

    johndeere4020 Road Train Member

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    That's not really a pin on per say, the ones I was thinking of pin on like a trailer axle.
     
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  7. haulhand

    haulhand Road Train Member

    It actually works better than a trailer pin on. It's quick and easy and quite a bit lighter. I wouldn't recommend it with a light frame tho.
     
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  8. johndeere4020

    johndeere4020 Road Train Member

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    You mean it comes off easy?
     
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  9. haulhand

    haulhand Road Train Member

    Yea it takes about 5 minutes to unbolt and drive away from it. It is super easy.
     
  10. Chrisqueen19

    Chrisqueen19 Bobtail Member

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  11. Caterpillar Cowboy

    Caterpillar Cowboy Heavy Load Member

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    Thanks for those pictures Haulhand, I've been seriously thinking about one of these to turn my 4 axle lowboy truck into a 5 axle when I want it to be. Especially if I every wind up pulling a belly or side dump, moreso especially if the haul pays by the tonnage. I've seen some pictures of guys out on the west coast mostly pulling logging equipment, with pin on's similar to this. Including the pin-on axle some trucks are 5's and I've even seen a 6 axle truck.

    Seeing you're from Wyoming, I penciled it out a few years ago that if I pinned on a 5th axle to my truck, and found a 4 axle belly dump to pull I should be packing around very, very close to the same weight as your standard Wyoming belly train at 117k, but with my setup in the neighborhood of 105k
     
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