Replacing Left-Hand End Disk Driver

1. Raise front doors on platform to access cutterbar U-joint coupler.

2. Put a wood block between right-hand end disk and outer sidesheet to prevent the disk from turning.

3. CAUTION: 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.

   
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   To avoid serious injury, rotate both knives on all disks, so they are positioned UNDER the disks.

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4. 
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   A - Shield

   Remove shield (A).

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5. 
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   A - Cutterbar U-Joint Coupler

   B - Converging Drum

   C - Cap Screw (4 used)

   D - Disk

   Remove four cap screws (C).

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6. Remove U-joint coupler (A) and converging drum (B).

7. Remove disk (D).

8. IMPORTANT:

   
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   A - Special Cap Screw and Washer

   B - Disk Driver

   The special hardened cap screw contains an encapsulated thread lock compound on it's threads. The special hardened cap screw must be replaced when removed and installed five times or anytime the disk driver is replaced.

   Replace the special hardened cap screw with genuine John Deere part specified for this application.

   Remove special hardened cap screw and special washer (A).

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9. Remove disk driver (B).

10. IMPORTANT:

    
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    A - U-Joint Coupler

    B - Bottom of U-Joint Bosses

    C - Driver

    D - Bottom of Driver

    E - Top of Bearing

    It is critical that mating surfaces of the bearing, driver, yoke, and driver retainer washer be free of dirt and crop before installing special hardened cap screw. If these areas are not thoroughly cleaned, the special hardened cap screw can come loose and cause cutterbar failure.

    Clean the following areas before installing U-joint coupler:

    • Bottom (B) of four U-joint bosses
    • Top of disk where U-joint coupler bosses seat
    • Bottom (D) of driver (C)
    • Top (E) of bearing
    
    

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11. 
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    A - Special Cap Screw and Washer

    B - Driver

    C - Timing Marks

    Align timing marks (C) and install new driver (B) on pinion shaft.

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12. Align timing marks on special washer (A) with mark on driver. Install washer.

    IMPORTANT: To avoid machine damage, use new center cap screw treated with thread locking compound.

    Replace the special hardened cap screw with genuine John Deere part specified for this application.

    Lubricate cap screw with light oil before installation. Failure to lubricate could allow cap screw to come loose and cause machine damage.

13. Lubricate special cap screw (A) with a light oil.

14. Install cap screw and tighten according to specifications.

    Item	Measurement	Specification
    Disk Driver Cap Screw	Torque	340 N˙m (250 lb-ft)

15. IMPORTANT: Each disk must be installed 90° to the adjacent disk (this is called synchronization). If the disks are not 90° to each other, damage to machine will result.

    NOTE: Disk life can be extended by moving disk to a location of opposite rotation. If this is done, the knives must be interchanged for proper cutting direction. (See INSTALLING AND SYNCHRONIZING DISKS and INSTALLING KNIVES in this section.)

    
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    A - Cutterbar U-Joint Coupler

    B - Converging Drum

    C - Cap Screw (4 used)

    D - Disk

    E - Lower Crop Shield

    Install disk (D) in original position (90° to adjacent disk).

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16. Apply NEVER-SEEZ® lubricant to gear case output spline shaft.

17. Insert U-joint coupler through middle of converging drum (B). Slide splined yoke of U-joint coupler (A) onto splined shaft of gear case.

18. Move bottom of U-joint coupler and converging drum assembly into position on disk.

19. IMPORTANT: Disk-to-driver cap screws are treated with thread-locking compound and can be used up to five times. Replace with the John Deere cap screw specified for this application.

    Fasten disk, converging drum, and U-joint coupler with four cap screws (C). Tighten cap screws to specifications.

    Item	Measurement	Specification
    Drum/U-joint/Disk-to Driver Cap Screws	Torque	150 N˙m (110 lb-ft)

20. NOTE: Replace cap screws after removing and installing five times.

    Adjust clearance between lower crop shield and disk. (See ADJUSTING LOWER CROP SHIELDS in this section.)

21. IMPORTANT: When installing left-hand converging drum shield (A) there should be a 1—6 mm (0.4—0.24 in.) clearance between shield and converging drum.

    
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    A - Shield

    Install shield (A). Make sure clearance between shield and top of converging drum is according to specifications.

    Item	Measurement	Specification
    Shield-to-Converging Drum	Distance	1—6 mm (0.4—0.24 in.)

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22. Remove wood block

23. Rotate disks by hand to make sure disks and knives do not interfere with each other or other cutterbar components.

24. Close front doors on platform.