Replacing Seed Opener Blades and Seed Tube Guard

If opener blade diameter is below 356 mm (14 inches) or if the beveled edge is worn off, the blades should be replaced. Also replace blades if damage caused by rocks or stumps results in an irregular seed furrow.

If opener blades must be replaced for any reason, be certain they are replaced with the correct amount of blade contact. To replace blades, proceed as follows:

1. Remove cap screw (A) and gauge wheel (B) from pivot shaft making certain to leave inside washers in place.

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2. (Planting unit equipped with rotary scraper) Pull front engagement pin outward, disengage it from the shank panels, rotate and insert scraper (A) between opener blades.

3. Remove hub cap (B).

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4. Remove nut, washer (A) from outside of bearing, disk blade and hardener washers from shaft.

NOTE: Nut on left-hand side of opener has left-hand thread.

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5. To properly replace blade assembly (A), add or remove hardener washers (C) behind blade bearing to obtain up to 55 mm (2 in.) of blade contact at front edge.

NOTE: Inserting a piece of paper at front edge will help verify this dimension.

Replace blade, bearing washer, nut and cap.

NOTE: Nut on left-hand side of opener has left-hand thread.

If seed tube guard is excessively worn, replace by removing pins (B) and guard. Install new guard and pins.

When assembled, the blades should turn with minimal resistance.

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