Posted by Janicholson on April 08, 2014 at 18:07:24 from (74.60.94.18):
In Reply to: TA Use-do don't? posted by kelly in tx on April 08, 2014 at 15:27:54:
As an operator with 10s of thousands of hours on TA tractors, here goes: Use it all the time. It was made to be used all the time. It is switched between Direct (handle forward) to TA by jerking the lever rearward as fast as you can to the latch point. (never ever pull it tenderly) Put into direct drive the same way. Pull back relesing the pawl with the flipper, and stroke that lever to its forward stop like you were late for a 1000 dollar gift card to your favorite hardware store. It cannot be moved too fast. The Big tractors with hydraulic TA are self shifting on lever movement, but swift movement is still recomended. The mechanical TA on the early and smaller tractors (H and M frame size) is a planetary gear set with a sprague (one way) clutch that holds the TA frame from turning backwards in TA reduction. The front of the TA frame and gears is equipped with a small disk type clutch that locks the reduction gears into a solid block so the entire assembly rotates. This is direct drive. The one way clutch rotates in its allowed direction when the lever is forward. The large frame tractors TA system is also equipped with a direct clutch, and a sprague clutch. Its gears are not planetary, but accomplish the same thing (about a 30% gear reduction). The big frame tractors also have a locking clutch in tandem with the sprague. This locking clutch is not designed to do anything but prevent "free wheeling" or coasting down hills out of control. They are not bullet proof, nothing is. Our 350U has the original TA, TA clutch, and TA one way clutch. It has been used more than the shifter lever. The tractor is on its third engine overhaul. and has been operated as the big tractor on 250 acres plowing with 3-14 mounted FH plow. Jim
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