I would not try using all thread in the end of the crank. The amount of pressure it took to install the pulley would pull the all thread right out of the crank! I oversized the holes to make it (more or less)centered to push on the pulley.
I used a plate from a seal driving tool (large truck) against the pulley to push with, that's probably what your seeing as a second groove. My pulley only drives a single belt.
I heated mine up, as did Hugh, warm to the touch. I highly recommed using 2" square (at least 3/16 wall) to make the tool with. I tried making one with 1" square and it crushed about half way on. By the time I made a second one with 2" square, everything cooled down.
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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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