George There was fix as fail warranty issue with the electric clutch bolts on the JD 275, JD 325 and the GT 262 when they were new. The bolts would shear like yours did. Go get the CORRECT bolt from JD. This was an issue until they changed the bolts supplied. Then make yourself a cylinder stop or use rope in the spark plug hole and then torque it to specifications. Many of the failures I have seen on these mowers, now that they are older, is when someone uses an impact wrench to tighten them. Use a Good torque wrench and tighten it to 60 Ft. Lbs. Also the factory bolts come with thread lock on the threads. IF you use an none OEM bolt you the medium strength Loctite on the bolt.
PS if you where able to get the broken piece out with out drilling it then the bolt worked lose and that cause the fatigue crack/failure you had. It was common on these when they where new.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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