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Ragged cut or excessive cob length
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Dull cutterhead knives
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Sharpen knives
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Dull stationary knife
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Replace stationary knife
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Excessive cutterhead knife-to-stationary knife clearance
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Adjust cutterhead knives and/or stationary knife
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Machine is set for too long a cut
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Reduce length of cut
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Not enough material in feed rolls
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Pickup: Increase ground speed or windrow size
Row-crop: Increase ground speed
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Rear feed roll held up
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Clean crop material from feed roll guides, around feed roll shafts and down stops.
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Excessive power required when using recirculating screen
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Dull knives
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Sharpen knives
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Excessive knife-to-screen clearance
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Set screen closer to knives
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Excessive surface moisture
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Use larger screen or remove screen
Wait for reduced moisture level
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Screen too small
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Use larger screen
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Screen worn
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Replace screen
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Knives hitting recirculating screen
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Screen not installed correctly
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Reinstall screen
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Deformed screen
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Replace screen
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Screen improperly adjusted
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Readjust screen
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