Introduction
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Torch the guard sheet metal as in the image. It doesn't need to be exact.
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Note: the shape shown is centered.
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Weld the top and side 2x2 angle pieces to it as shown.
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Not all holes will be accessible with a punch. Torch the rest.
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Torch the hole for mounting the motor in the 8" piece of 4x4 angle. Grind off the slag.
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Double check that the hole is large enough by putting on the motor and making sure the raised portion in the center goes all the way thru.
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You can torch separate holes for the bolts, or do one large, odd shaped one like is pictured.
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Torch whichever holes you couldn't access with the punch
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Weld the bottom 2x2 to the 21" 4x4.
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Weld the two 4x4 angle pieces together as pictured, ensuring they are perfectly flush and square.
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Skip around while welding so it doesn't warp one way or another.
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Grind off the top weld linking the 4x4's so the bearing will be able to sit flush on it
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Also grind off near the bolt holes on the bottom.
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