Inspect and Adjust the Furrow Opener Blades

1. CAUTION:

   
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   A - Cap Screw

   B - Pivot Arm

   C - Scraper

   D - Contact Area

   Avoid injury from sharp edges on the blades. Wear protective gloves and handle the blades carefully.

   Inspect the contact area (D) where the blades touch.

   1. Insert two business cards (or similar items) between the blade opening and gently slide the cards together until the blade contact area is reached.

   2. Measure the distance between the business cards and compare the measurement to the specification.

      Item	Measurement	Specification
      Blade Edge	Contact Area	38—64 mm (1.5—2.5 in)

   3. If the contact area does not fall within the specifications, proceed as follows:

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2. Remove cap screw (A), pivot arm (B), and the gauge wheel.

3. Inspect the scrapers (C) for excessive wear and replace as necessary.

4. Inspect the blades for wear or damage.

   Measure the blade diameter and compare that to the specification. If the diameter is below the specification, if the beveled edge is worn away, or if significant damage is apparent, replace the blades during this procedure.

   Item	Measurement	Specification
   Opener Blades	Minimum Diameter	35.5 cm (14 in)

5. 
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   Centered Blades

   
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   Blades Not Centered

   
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   A - Blade, Furthest

   B - Row Unit

   Determine the adjustment required. View the blades from the front of the row unit.
   • If the blades are centered, remove one blade to adjust the contact area.
   • If the blades are not centered, adjust the blade that is furthest (A) from the row unit (B).
   
   

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6. CAUTION:

   
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   A - Nut

   B - Blade

   C - Shims

   Avoid injury from sharp edges on the blades (B). Wear protective gloves and handle the blades carefully.

   IMPORTANT: Avoid spindle damage. The nut on the left side of the row unit has left-hand threads.

   NOTE: While the blade is removed, inspect all of the components between the blades for wear and damage.

   Do not discard the shims.

   Remove the nut (A), and the blade (B).

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7. Reposition one or more of the shims (C) from one side of the blade to the other to increase or decrease the contact area. Install the blade, inspect the adjustment, and repeat the shim placement as needed.

8. Tighten the blade nut to specification.

   Item	Measurement	Specification
   Blade Nut	Torque	122 N·m (90 lb·ft)

9. Adjust the gauge wheels. (See Adjust The Gauge Wheels in this section.) Tighten the pivot arm cap screws to specification.

   Item	Measurement	Specification
   Pivot Arm Cap Screws	Torque	271 N·m (200 lb·ft)