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West Central Iowa | We have had good luck with the Jamison drive. The bearings they use are common to the planter already and we have replaced a few of them. The only issue we had was keeping a couple of the set screws tight that hold the sprockets from sliding. A dimple in the shaft under to help seat the set screw and some locktite will cure those issues. Or in our case, a tack weld for insurance. We also replaced the idler sprocket they provide for the transmission drive chain tightener with the plastic roller and metal bushing like the rest of the transmission uses. This gives a lot more margin for error in keeping the chain the right tightness. Overall, I would never go back to the original clutch and drive wheel chains!
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7000 planter updates
