First off, I have got to say that anyone who says they are a "mountain trucker" that does not use the jakes, would not have a job long if the mechanic saw them, or when they drag into the yard a day or two behind the guy that used his jakes. Granted, I may be young, but I am used to real loads (up to 110,000 legally, seen upwards of 130,000 on off-road jobs) and real hills (%10-%12 on the highway, around %22 on off-road dirt jobs), and in those situations, you use the jake and whatever else you can think of.
Something nobody has mentioned, is shifting with the jakes when accelerating. When you are loaded heavy, going uphill, or on soft ground, using the jake to bring the RPM`s down faster between gears lets you shift faster and conserve momentum.
And on the maintanence side of it, jakes don`t harm the engine, and they save a lot of wear and tear on brakes and tires. There is not much money to be had owning a truck, less so when you tear things up you don`t need to. I guess what it comes down to for me, is that the old trucks went a lot of places with no jakes, but nowadays we don`t have the luxury to take our time, or the extra cash to spend money we don`t absolutely have to.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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