Rusty and Jim, you are both thinking "old school" with the MECHANICAL TA found on Super MTA, 300, 400, 350, 450, 340, 460, 560, 660, 504, 606, 544, 656, 666, and 686 tractors, for example.
Any other tractor with a TA has a HYDRAULIC TA, which is completely different from a mechanical TA. There are too many to list, but all other 06, 56, 66, 86, 3X88 and 6X88 series tractors have this type of TA.
Believe what you will, but the fact of the matter is, the hydraulic TA is most certainly meant to be used as an extra gear. mazemeister's explanation of the way the mechanism works is an excellent one, and indicates that it is actually LESS wear in TA speed with a hydraulic TA.
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Today's Featured Article - Talk of the Town: Winterizing Engines - To Drain or Not to Drain? - by Russ Berry. What is this strange attraction I have to equipment and machinery? How did I get this way? I came from the suburbs and own a small horse farm in rural Loudoun County, Virginia. You can call me a "weekend farmer." The local farmers do. Does it bother me? No. I am just happy to have their friendship. At least the word "farmer" is in my title. But what is the attraction? How can I explain the sensation and exhilaration I feel when I turn the key and hear the engine come to life (most
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