Horsepower Needed

Discussion in 'Ask An Owner Operator' started by voltairegomez, Aug 18, 2019.

  1. voltairegomez

    voltairegomez Bobtail Member

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    Aug 18, 2019
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    Hey guys, need some help. I am looking at purchasing some tandem axle tractor to haul end dumps These trucks will not be on the road and will remain inside a quarry, so we're not concerned with highway weight limits. The end dumps are filled with 30 cubic yards of material or approximately 46 tons of material. I would like to know if there is a certain amount of horsepower we need to make sure tractor have enough horsepower in order to move material. There are a few hills we need to climb but nothing too steep. Any help is GREATLY appreciated!!!
     
  2. FinkPloyd

    FinkPloyd Light Load Member

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    What you need to ask is how fast do you want to climb these hills?
     
  3. Cattleman84

    Cattleman84 Road Train Member

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    If speed is not a concern then its not about horsepower... Its about gearing!... They used to haul some incredibly heavy loads in the 40s, 50s, and 60s with 300 or 400 hp trucks... It's all about the gearing.
     
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  4. FinkPloyd

    FinkPloyd Light Load Member

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    More like 180 or 220 hp The biggest motor cummins had back then was the Supercharged NHRS 320
     
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  5. voltairegomez

    voltairegomez Bobtail Member

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    We're considering a few 425 HP, 10 speed man transmission. Just need to make sure we don't buy the wrong HP when looking to make this acquisition. Is there a certain type of gearing I should be leaning towards?
     
  6. FinkPloyd

    FinkPloyd Light Load Member

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    A 300hp mack with a 5 speed would do what you want just not very fast, for what it sounds like you are doing just about any class 8 tuck will do.
     
  7. Cattleman84

    Cattleman84 Road Train Member

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    You want very low geared rear ends... And a transmission with short gears.... It wont be fast, but if its setup right it will tear the roots of the Tree of Life and Death from Heaven and Hell.
     
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  8. voltairegomez

    voltairegomez Bobtail Member

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    You guys are absolutely awesome, thank you!!!
     
  9. starmac

    starmac Road Train Member

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    I like hem 40, 50, and 60, 300 and 400 horse motors, hell I still have an old truck with a 471 jimmy in it, a 56 model. I am not sure what it is, maybe 120, maybe. lol

    An l 10 cummins will do anything you need, motor is not important, Most important to keep something together with no trouble will be the rears, no higher than 410's, 529's would be better 40's will get you by, but 46's would be much better, I would not be looking at 10 spd's, you really want something more in line with an 8LL or even a 15, something with the deep reduction gears, for taking off with big loads in the dirt.
     
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  10. LondRanger

    LondRanger Heavy Load Member

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    Here to learn, so my question would be stupid as hell im guessing, but wouldn’t a 18 speed just do everything and then some with the right gearing?

    Mind as well have it and not need it than need it not have it.
     
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