Adjusting Opener Down-Pressure-Tractors With Open Center Hydraulic SystemsIMPORTANT: Drill MUST BE equipped with Open Center Hydraulic Kit with Change Valve if used with a tractor with an open-center hydraulic system. See your John Deere dealer for installation. 1. Refer to UNDERSTANDING ACTIVE HYDRAULIC OPENER DOWN-PRESSURE SYSTEM and determine initial pressure setting. 2. Place tractor transmission in "park" and keep engine running. 3. Lower openers by holding the SCV lever forward for a few seconds, then release. This pressurizes the opener down-pressure system. |
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NOTE: Gauge needle will not move when knob is turned. 4. Rotate knob (A) to adjust down-pressure. To decrease down-pressure, turn knob counterclockwise; to increase down-pressure, turn knob clockwise. One full turn equals approximately 1724 kPa (17 bar) (250 psi). Once set, lock knob in position with wheel (C). 5. Recharge the down-pressure system by raising and lowering the openers, holding the SCV lever forward for a few seconds to pressurize the cylinders. 6. Recheck pressure gauge (B) after cycling control lever. Gauge needle should be at desired setting. If gauge needle has not moved, see OPENER DOWN-PRESSURE SYSTEM (TRACTOR WITH OPEN CENTER HYDRAULICS) in the Troubleshooting section. 7. Make a trial pass in the field. 8. If opener penetration is not satisfactory, adjust hydraulic pressure for more down-force. If gauge wheel contact is adequate but depth of penetration is not, see OPENER COMPONENTS AND ADJUSTMENTS and ADJUSTING GAUGE WHEEL AND SEEDING DEPTH in Preparing The Machine section. |
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