Repeated shear bolt problems are from A) Outer reversing box totally devoid of lubricant and jamming, or B) Shear bolt holes worn and allowed to work on shear bolt, especially if the tube has a bow in it from shipping damage or some other reason. With the bow just starting past the highest point, the downward force of the augers will rotate the tube quickly until the lost motion is taken up against the shear pin. If the holes are bad enough, the bolt can actually be sheared in the same direction the gearmotor rotates. If the holes are sound and the bolt is tight, this cannot happen. Mechanical devices in hostile environments need to be serviced once in a while.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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