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Seed population low.
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Excessive drive tire slippage.
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Reduce row unit down force or check drives for binding or misalignment
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One half row units will not plant.
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Half-width drive disconnect is "On".
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Turn half width drive disconnect "Off".
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Half-width drive disconnect clutch not driving.
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Repair or replace.
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Chain driving one-half of row unit, drill shaft missing.
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Replace chain.
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Excessive buildup of soil on drive tire.
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Planting in wet conditions.
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Use tire scraper attachment. See your John Deere dealer.
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Contact tire does not turn.
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Soil packed between shield and contact drive tire due to planting in wet conditions.
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Clean and use tire scraper attachment. See your John Deere dealer.
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Seeds on top of ground at row end or drive does not engage at beginning of row.
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Contact drive engagement point misadjusted.
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Adjust contact drive engagement point.
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Excessive shearing of seed drive cotter pin.
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Drives binding or misaligned.
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Repair cause of pin shearing and replace cotter pin.
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Chains binding.
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Lubricate chains.
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Check for freedom of movement.
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Consistent shearing of drill-shaft cotter pin.
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Drill shaft not aligned properly.
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Loosen bearing and align shaft.
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Row units on right-hand wing frame not planting.
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Right-hand drill-shaft drive coupler cotter pin sheared.
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Repair cause of pin shearing and replace cotter pin.
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Row units or left-hand wing frame not planting.
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Left-hand drill-shaft drive coupler cotter pin sheared.
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Repair cause of pin shearing and replace cotter pin.
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All row units not planting on planter.
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Cotter pin in contact drive tire sprocket to seed transmission sheared.
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Repair cause of pin shearing and replace cotter pin.
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