Installing Knives

1. CAUTION:

   
   TS268-UN-23AUG88

   Knives have two cutting edges. Be careful when working around the knives. Knives are sharp and can cause serious injury. Wear gloves when handling knives.

   Clean mounting area.

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2. CAUTION: If knife bolt (E) is installed incorrectly, lock nut (C) may not tighten sufficiently causing it to loosen during machine operation. Loss of bolt and knife during machine operation may cause personal injury or machine damage.

   IMPORTANT: Always use genuine John Deere knives. Replace each special knife bolt and special lock nut when it has been removed and reinstalled five times.

   NOTE: The knife bolt hex must align with hex in the disk hole.

   Make sure “leading” edge (F) (twist of knife is closet to the ground) faces in same direction of disk rotation.

   
   E47685-UN-16FEB00

   
   E47697-UN-31JAN00

   Direction of Knife Rotation

   
   E47730-UN-16FEB00

   Twist-Leading Cutting Edge

   A - Knife

   B - Wear Shield

   C - Lock Nut

   D - Disk

   E - Knife Bolt

   F - Leading Edge

   G - Twist of Knife

   Install knife (A) as follows:
   • Install knife (A), with arrow in correct direction of rotation (lowest side of twist in knife should be leading edge of knife). Knives can be installed with bevel up or down. With bevel down knives do not dig up as many rocks and are less damaged by small rocks. With bevel up knives pickup down crop better and cut slightly lower.
   • NEW KNIFE: Install knife with bevel side of cutting edge facing toward ground.

     REVERSING WORN KNIFE: ¹ Install knife with bevel side of cutting edge facing upwards.

   • Install wear shield (B), knife bolt (E), and lock nut (C). Make sure knife bolt is correctly seated in groove.
   
   

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3. Tighten knife lock nut to specification.

   Item	Measurement	Specification
   Knife Mounting Lock Nut	Torque	150 N˙m (110 lb-ft)

4. Make sure knife rotates freely on the bolt.