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Depth control does not function correctly
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Transport lock-up valve closed
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Open valve
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Cylinders not "rephased" (synchronized)
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"Rephase" (synchronize) cylinders
IMPORTANT:
Be sure all air is bled from depth control system
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Machine operating at different depths
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Hard ground or adverse operating conditions
See implement operator's manual
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Cylinder leakage
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Check for leakage
Repair or replace cylinders; see your John Deere Dealer
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Insufficient tractor hydraulic pressure
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Check tractor hydraulic pressure; use correct size cylinders for tractor pressure
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Hydraulic hoses not connected correctly
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Reconnect correctly
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