Flange Lock Nut Oversize
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Flange Lock Nut Oversize. The closing wheel lifts soil off the furrow sidewall and folds it back over the seed, finishing the seed-to-soil contact that gives even germination and emergence.
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How to check for wear
Get the unit clean, then grab the arm and try to move it side to side — a new bush kit should show no lateral play at all, so note any that's there. Move the arm up and down; it should travel smoothly with no stiffness. If the arm can be swung in a circular motion, the bushes are past their life and you risk major damage to the housings. Check the washer and nut on the pivot and replace if worn, and inspect the bush housings for any damage that stops them holding the bushes, pin and seals.