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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 Shows Zero When Openers Are Down.
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SCV lever in float position.
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Put SCV lever in neutral position.
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SCV lever not held forward long enough to charge down-pressure system.
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When lowering openers, hold SCV lever forward long enough for down-pressure system to reach pre-set pressure as shown on pressure gauge.
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Openers Do Not Maintain Proper Ground Contact.
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SCV lever not held forward long enough to charge down-pressure system.
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When lowering openers, hold SCV lever forward long enough for down-pressure system to reach pre-set pressure as shown on pressure gauge.
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Slow internal hydraulic leakage. (Normal with all hydraulic systems.)
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Hold SCV lever forward long enough for down-pressure system to reach pre-set pressure as shown on pressure gauge.
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More hydraulic pressure required.
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Increase pre-set hydraulic pressure.
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Pre-set Pressure Does Not Lower When Turning Valve Knob Counterclockwise.
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Open center attachment traps oil in system until openers are raised.
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Raise and lower openers to reset to lower pressure.
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Pressure valve sticks.
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Disassemble valve and clean.
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Pre-set Pressure Does Not Rise When Turning Valve Knob Clockwise.
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No pressure to adjusting valve.
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Hold SCV #1 in forward position for a few seconds.
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Hose couplers not connected properly to tractor.
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Ensure that hose couplers are connected to proper SCV and locked.
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Openers Drift Down After Being Raised.
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There may be contamination in the V1 ball check assembly or the piston seal in the hydraulic cylinder may be leaking.
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Close transport valve and disconnect hydraulic hoses to the tractor SCV. If openers still continue to drop, see your John Deere dealer.
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