Replace Seed Opener Blades and Seed Tube Guard

1. IMPORTANT: Avoid premature wear. Do not use a new blade with a used blade. Install new blades in pairs.

   NOTE: If replacing seed tube guard only, the right-hand blade does not need to be removed.

   
   A53246-UN-29OCT03

   A - Cap Screw

   B - Pivot Shaft

   Remove cap screw (A), pivot shaft (B,) and gauge wheel from row unit.

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2. 
   A51073-UN-11NOV02

   A - Engagement Pin

   B - Scraper

   C - Hub Cap

   Planting unit equipped with rotary or rigid scraper, pull front engagement pin (A) outward, disengage scraper assembly (B) from shank panels.

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3. Remove hub cap (C).

4. CAUTION: Disk blades are sharp. Wear protective gloves and handle disks carefully to avoid being injured.

   NOTE: Do not discard spacer shims.

   
   A51112-UN-20NOV02

   A - Nut and Washer

   B - Disk

   Remove nut and flat washer (A).

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5. Remove blade (B).

6. Remove hardened shims.

7. If replacing blades, remove blade on opposite side of row unit. If replacing seed tube guard only, right-hand blade does not need to be removed.

8. NOTE: Replace seed tube guard, if excessively worn.

   
   A56479-UN-29JUN05

   A - Seed Tube Guard

   B - Seed Tube

   Remove seed-tube guard (A) by rotating clockwise and sliding forward.

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9. Adjust blade contact point during reassembly. See INSPECT AND ADJUST SEED OPENER BLADES in this section.

10. During reassembly, tighten opener blade nut and gauge wheel arm cap screw to specification.

    Item	Measurement	Specification
    Opener Blade Nut	Torque	122 N·m (90 lb.-ft.)
    Gauge Wheel Arm Cap Screw	Torque	271 N·m (200 lb.-ft.)

11. Adjust gauge wheels. See ADJUST GAUGE WHEELS in this section.