Inspect and Adjust Opener Blades

1. 
   A60211-UN-12JUN07

   A - Business Cards

   B - Contact Area

   Support machine safely. (See procedure at the beginning of this section.

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2. CAUTION: Disk blades are sharp. Wear protective gloves and handle disks carefully.

   Inspect blade edge contact point as follows:

   1. Insert two small business cards (A) between blade opening and gently slide cards together until blade contact point is reached.

   2. Measure blade contact area (B) and compare to specification.

      Item	Measurement	Specification
      Blade Edge Contact Area	Distance	31—51 mm (1.25—2.0 in.)

   3. If distance is not as specified, proceed as follows:

3. 
   A60212-UN-12JUN07

   A - Dust Cap

   B - Nut

   C - Blade

   D - Shim Washers

   Remove dust cap (A), nut (B), and blade (C) from spindle.

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4. Measure blade diameter and compare to specification. Replace blades, if diameter is below specification, beveled edge is worn off, or damage is apparent.

   Item	Measurement	Specification
   Fertilizer Blade—Minimum	Diameter	317 mm (12.5 in.)

5. If blade replacement is required, see REPLACE DISK FERTILIZER OPENER BEARING in this section.

6. Remove shim washers (D) to increase disk contact area, or add shim washers to decrease disk contact area.

7. CAUTION: Disk blades are sharp. Wear protective gloves and handle disks carefully.

   Install blade in reverse order and tighten nut (B) to specification.

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

8. Check blade contact area.

9. Repeat procedure until blade contact area is as specified.

10. Remove support components.