Looking at the difference in sizes of the two clutches would make one wonder how come the TA can get by with a smaller disk.
The reason is that the TA clutch does not have to hold as much torque as the main clutch because of the gear reduction in the TA. The power is transmitted through the TA gears to the input shaft of the transmission. As the TA reduces the output shaft speed the torque entering the transmission is greater than the torque coming through the main clutch. Since torque is increased as speed is decreased, the opposite is also true. The gearing in the TA has the effect of trying to increase the speed of the TA clutch assembly and thus reducing the torque available. The result is that the TA clutch, even though it is smaller, is able to handle as much HP as the main clutch.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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