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Down-pressure does not function.
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Lock-up valve closed.
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Open lock-up valve.
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Pressure gauge near zero when openers are lowered and SCV lever is held forward for a few seconds.
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Hose routing between pressure control valve and cylinders incorrect.
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Correct hose routings.
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Pressure gauge shows pressure as openers are raised.
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Hose routing between pressure control valve and cylinders incorrect.
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Correct hose routings.
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Openers rise when SCV lever is held forward, and lower when held rearward.
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Hydraulic hoses are connected to tractor incorrectly.
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Reverse hoses in SCV coupler.
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Pressure gauge shows zero when openers are down.
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Valve in float or neutral position.
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Install R62667 SCV clip in proper position on 55-70 Series tractors to hold lever forward, valve open.
Push SCV control forward until detent click is heard. Set time detent to "continuous" on tractors with electro/hydraulic SCV controls.
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Openers do not "float" over undulating ground.
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SCV lever not in forward position.
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Install R52667 SCV clip in proper position on 55-70 Series tractors.
Push SCV control forward until detent click is heard. Set time detent to "continuous" on tractors with electro/hydraulic SCV controls.
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No reading on gauge.
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Using open center tractor.
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Install Open Center Hydraulics Kit from your John Deere dealer.
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