Hills

Discussion in 'Questions From New Drivers' started by crazw, Nov 4, 2013.

  1. crazw

    crazw Light Load Member

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    Sep 10, 2012
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    Ok first time in the West. Utah, Montana, Idaho etc.

    Didn't get any hands on training on hill descending. I know what the books say, go down a or 2 gear than you went up. I need to know real life examples.

    Lets say I climbed a hill. Then I see the 6% downgrade sign. Speed limit still posted at 65 or 75. How should I attempt this safely and not burn engine up or brakes? Have a freightliner 10 speed.

    If I stay in 10th gear, my weight pushes fast. I put engine brake on high but I still can get to 75mph if I let it. Then I stab break to 5mph less but in less than 20 sec I'm back too fast. Isn't that gonna burn brakes out if I'm braking every 10 sec or less??

    I then tried on an other hill going down in 9th gear. Thought this was supposed to keep me from going 60mph...well I think it got up to 65mph, Rpms were screaming at 2000, engine brake was on high. Is this right to do? Didn't seem like it, but truck didn't blow up. Also I was worried if it had of kept me about 50-55mph, and speed limit is 65, would I be too slow for traffic?

    There were no truck safe speeds posted in these instances...at least that would have game me something to aim for.

    How the heck you do this when its snowing and training says not to use engine break in rain or snow?

    My real concern is winter weather.

    please any help much appreciated, please give examples. Thanks
     
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  3. jldilley

    jldilley Medium Load Member

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    Oct 13, 2013
    Indianapolis, In
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    A lot of it has to do with how much weight is on your truck. You want to make sure you are in control of the truck at all times. Don't worry about impeding traffic going down hill or uphill for that matter. Just stay in the granny lane and turn your four ways on. You should be in a gear slow enough where you have to brake down maybe every ten or 15 seconds. If you struggle to keep it under 1500 rpm or so then your in too high of a gear. A lot of this is feel you're going to have to develop. Unfortunately, like with most trucking skills, the textbook goes out the window when you enter the real world. Hope this helps.
     
    crazw Thanks this.
  4. jldilley

    jldilley Medium Load Member

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    Also, definitely don't use the engine brake in snow or rain. It has to do with the truck and trailer braking at different rates. It is much easier to cause a jackknife. In this kind of weather you should reduce your speed anyway.
     
  5. crazw

    crazw Light Load Member

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    Sep 10, 2012
    Buffalo, NY
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    [/QUOTE]Unfortunately, like with most trucking skills, the textbook goes out the window when you enter the real world.[/QUOTE]

    So are you say we can use engine break when raining and snowing? If so can it be on high or has to be low?

    Yes you did help with rpms and 15sec timing. I really appreciate it!
     
  6. jldilley

    jldilley Medium Load Member

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    :biggrin_25520:
    Lol...
     
  7. crazw

    crazw Light Load Member

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    Sep 10, 2012
    Buffalo, NY
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    If no jake, then how can I possibly come down a hill 30, 40, 50mph without it? Even with 73k that is gonna push me so fast that ill be braking every 3-5 seconds!
     
  8. jldilley

    jldilley Medium Load Member

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    Indianapolis, In
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    No it won't. Not if you use low enough of a gear. Like I said, in that situation you're gonna wanna go extremely slow anyway. Who did you train with?
     
  9. crazw

    crazw Light Load Member

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    Sep 10, 2012
    Buffalo, NY
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    Ok so I can understand, why in 9th gear was I still able to get as high as 65 and rpms @ 2000?

    With 70k, and in lets say 7th gear, what's the max speed the truck will get up to...descending 6% ?
     
  10. Richter

    Richter Road Train Member

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    Philadelphia Pa
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    Most jacks are trailer induced, not truck..and most of them are do to locking the trailer brakes. Yes its possible to create a tractor induced jackknofe with jake, but its a simple switch to fix it. As i said on your other post, if in low enough gear, you dont need jake, but I would use it. In rain I use it on high all the time. In snow and ice, be careful an maybe only use on low, but I wouldn't say dont use it. I use it ALL THE TIME though in rain. Many of use do
     
  11. jldilley

    jldilley Medium Load Member

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    Oct 13, 2013
    Indianapolis, In
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    Fair enough. To me it's not worth th added risk. It's true thst it jackknifes the trailer but its because the tractor is braking while the trailer is not causing the trailer to push on the tractor. Dangerous in wet conditions.
     
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