I always have the Interaxle Differential Lock engaged in slick conditions. A good practice drill for anyone new to the concept is find a wide open icy parking lot and practice bobtail with and without the IAD (power divider) engaged. Try getting going in 4th in low rpm's and then romp on the throttle. Without the power divider engaged you will likely yaw to the left. Engage it and try that again.
Some trucks are different than others. Some become very stable with the power divider engaged. Others are "less stable".
Try that exercise again with and without the IAD engaged winding it up to 1800 rpm's in 4th and then get off the throttle in high Jake. Learn the limitations and reactions of your tractor using the IAD and the Jakes. Then try it again with an empty trailer. Practice until you have the feel of it. The wrong time to START practice is descending westbound from the Eisenhower Tunnel in a local blizzard with no chains on.
Driving down steep grades in icy conditions
Discussion in 'Questions From New Drivers' started by Lepton1, Sep 21, 2017.
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Crude Truckin' and Lepton1 Thank this.
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Crude Truckin' Thanks this.
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Just watch Ice Road Truckers.....and disregard the suspense music. They never fall through the ice
RIP Darrell Ward.Crude Truckin', Blackshack46 and Lepton1 Thank this. -
WesternPlains Thanks this.
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The same thing you do with the jakes you can do with the brakes, it just requires a little more effort and conscious control to use the peddle.
Like I said, and how the driver in your video said, how you get by in slick conditions my be your business, but you do a dis-service to disregard the fact that most new drivers that find themselves on icy roads overestimate their ability and use of the jake. -
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Looks just like normal road conditions to me. Part of life in the Great White North.
Freezing rain polished by the wind, now that's slippery.not4hire, Crude Truckin', Lepton1 and 2 others Thank this. -
I actually LIKE using the jake in slick conditions. Once the jake shuts off (engine RPM goes to naught when the wheels lose traction), you still have 8 MORE brakes to apply and slow you down. Apply minimum power, straighten out, flip Jakes off, apply brakes, reduce speed several gears, try again.
When going down on service brakes, if you were to lose traction, you have NO more brakes to apply. No margin. EEK!
I like having lots of margin. A tractor losing traction is something that happens dozens of times a year in our operation, and is no big deal. We get to practice getting in and out of some of the places we load and unload just to get in there. Modulate power, straighten out, apply brakes, reduce speed, try again.
Not using Jakes would scare the bejeebers out of me.not4hire, augiedoggie41, uncleal13 and 4 others Thank this.
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