Amen. To what you said along with John T above and observing Bob M's cautions. (Days like this might make me actually believe I'm hangin' out with good company!!) ;8^)
An extension on the handle of a torque wrench (it'd have to be a big one on a tight nut for there to be any need of that) won't have any effect on the reading (or the "pop" point) of a torque wrench.
And for anything that can be tightened by hand, an extension running perpindicularly (ain't that some kinda word!) off the drive of the torque wrench won't appreciably distort the reading, as long as one makes the effort to keep the sweep of the wrench handle perpindicular to the axis of the thread being torqued. Your arm will give before the steel in the extension twists.
The caution is to do with things like crowfoots, which are sometimes necessary to get to the bolt/nut to be torqued. For that you need to do add the length from the center of the drive on the torque wrench to the center of the fastener to the working length of the torque wrench, divide by the newer length and adjust to a lower torque accordingly. Torque is foot-pounds. Add feet, reduce pounds to get the same result.
And a little fudging is allowed. These are tractors that (with the possible exception of the ETD) will never be exposed to the the conditions to be met in outer space, where torque tolerances can be a matter of life and death.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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