Adjusting Opener Down-Pressure and Seed Depth (Tractors With Open Center Hydraulic Systems)

IMPORTANT: Valve (D) must be in closed position.

IMPORTANT: Drill MUST BE equipped with open-center check valve kit if it is to be used with a tractor with an open-center hydraulic system. A open-center check valve kit and installation instructions are available from your dealer.

1. Place tractor transmission in "park" and keep tractor running.

2. Unfold the frame.

3. Lower the openers, holding the SCV lever forward for a few seconds, then releasing. This pressurizes the opener down pressure system.

4. Close valve (D).

5. Adjust opener hydraulic down-pressure valve so that needle on pressure gauge (C) is at lower end of green area. To decrease down-pressure, turn valve adjusting knob (A) counterclockwise. To increase down-pressure, turn knob clockwise. One turn equals approximately 250 psi. Once set, lock knob in position with wheel (B).

NOTE: The gauge needle will not move while the knob is being turned.

Then recharge the down-pressure system by raising and lowering the openers, holding the SCV lever forward for a few seconds to pressurize the opener cylinders. Recheck pressure gauge needle position.

N59938
N2150RY


A-Valve Adjusting Knob
B-Valve Knob Lock
C-Pressure Gauge
D-Valve

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IMPORTANT: NEVER operate the machine with the pressure gauge needle in the RED ZONE on the gauge. This could either raise the drive wheels off the ground and/or force too much down-pressure through the openers, bending the drawbars.

If gauge needle does not move, see Troubleshooting-Opener Down-Pressure System in the Troubleshooting section.

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6. Preset planting depth (always raise the openers to adjust the planting depth). Position depth adjusting handle (A) with left pin in lowest hole and right pin in next to lowest hole. This setting generally provides a 25 mm (1 in.) seed depth. Each handle position changes the depth approximately 8 mm (5/16 in.).

7. Lower the openers while moving forward, holding SCV lever forward for a few seconds to pressurize the opener down-pressure system.

8. Stop without raising openers.

9. Check whether or not gauge wheel arm is up against opener depth adjusting handle. If not, increase hydraulic down-pressure turning adjusting knob one full turn.

NOTE: Do NOT use more down-pressure than required to maintain desired depth.

10. Once the wheel arm is against the depth adjusting handle, check seed depth.

N42150RZ


A-Depth Adjusting Handle

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11. To change seed depth, raise openers and reposition depth handle.

12. Two ways to increase opener down-pressure to compensate for track left by machine or tractor tires are as follows:

  • Remove pin (C) and turn clevis (D) to increase length of spring assembly. When lengthening spring assembly by 1/4 to 1/2 in., install jam nut above clevis to lock clevis to cap screw. Lengthening spring assembly 1/4 in. will lower opener 3/4 in. DO NOT lengthen assembly more than 1/2 in.. Lengthening assembly will decrease opener ground clearance when openers are raised.
  • Tighten nut (B) in 6 mm (1/4 in.) increments until desired penetration is achieved.

Initial Dimensions Are:

Dimension Short Long
E 24.1 cm (9.6 in.) 27.9 cm (11 in.)
F 35.1 cm (13.8 in.) 44.5 cm (17.5 in.)

 


B-Depth Adjustment Nut
C-Pin
D-Clevis
E-Dimension
F-Dimension

N42150FQ
A40205

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