Pulling a pup (28’) with a tandem tractor

Discussion in 'LTL and Local Delivery Trucking Forum' started by Air Cooled, Sep 3, 2020.

  1. LTL Bull

    LTL Bull Road Train Member

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    I've never understood the fascination of a tandem over a single in the snow. A single is putting more weight down in a given area. In terms of traction that's what you want . I've run all over the NE to include the lake effect snow belts and I've gotten hung up more with a tandem in the snow than I did any of the single axle tractors I've driven. The single axles were day cabs and sleeper tractors. Unless you have full lockers, a tandem doesn't have better traction than a single axle. I could put 20,000 on a single drive whereas it's 34,000 on a tandem. Less weight spread over twice the surface contact means less tractive effort
     
    Last edited: Sep 6, 2020
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  3. Air Cooled

    Air Cooled Road Train Member

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    I’m assuming your far enough under the trailer with st back landing gear?
     
  4. LTL Bull

    LTL Bull Road Train Member

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    R&L only uses tandems in linehaul service with pups
     
  5. MACK E-6

    MACK E-6 Moderator Staff Member

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    They still run a lot of longboxes on linehaul, but I'll still pull pups with my single screw since it's tagged for 80K and when I'm sure I'll be dragging pups both ways.
     
  6. Brettj3876

    Brettj3876 Road Train Member

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    Same here i agree with you. My dad used to have a U model mack with a tag axle. Going to job sites off road he'd lift that tag up and it would make it places twin screws had to get pulled into
     
    LTL Bull Thanks this.
  7. 201

    201 Road Train Member

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    IDK, better to have a tandem just in case you need it to haul a real trailer,,;) Me? I'd probably never run a twin screw again. Tag axle or pull the guts out of a drive axle, but if it's so rough you need a 2nd drive axle, it's probably too rough to go anyway.
     
  8. LTL Bull

    LTL Bull Road Train Member

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    IMG_0118.JPG IMG_0119.JPG
    I stand corrected on that part. If I knew I'd bring an empty back I'd use my city single once in a while for a weekend linehul too. I was generalizing a bit.
     
    MACK E-6 and Speed_Drums Thank this.
  9. road_runner

    road_runner Road Train Member

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    I second or third to take your mudflaps off. As long as you are pulling a trailer, you don't legally have to have them. Reddaway doesn't even have rear license plates since we almost always pull a trailer. The other issue to consider is if you back up and over a curb and your mudflap hangs low, it can get snagged between the curb and your drive tire. I've torn off several flaps that way.
     
    truckguy391 and Cardfan89 Thank this.
  10. mnmover

    mnmover Road Train Member

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    The average tandem tractor with a sliding 5th wheel does not allow the 5th wheel to go back far enough to pull a 28 foot trailer. It may if the pup has a 30 inch pin setting. We have to get Ryder rentals when our single axle sleepers break down and they have to remove the mudflaps and the outside rear axle tires .
     
  11. road_runner

    road_runner Road Train Member

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    Maybe that's true for a sleeper cab. But on daycabs, we could get the fifth wheel to slide all the way forward. It was actually preferred that you had your fifth wheel upfront, you could get up to 1k lbs of additional gain on your steer tires during the winter time.
     
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