Replacing Left-Hand End Converging Disk Driver

1. Raise front doors to access disk drivers.

2. Put a block of wood between right-hand end disk and outer sidesheet.

3. Remove shield (A).


A-Shield

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4. Remove four M12 x 35 cap screws (C).

5. Remove driveline (A) and converging drum (B).

6. Remove disk (D).


A-Cutterbar Driveline
B-Converging Drum
C-Cap Screw, M12 x 35 (4 used)
D-Disk

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

8. Remove disk driver (B).

9. If spline has been sheared, remove loose pieces of spline.


A-Cap Screw and Washer
B-Disk Driver

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IMPORTANT: 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 loosen and cause cutterbar failure.

10. Clean the following areas before installing disk driver:

  • Inside yoke (A).
  • Bottom of yoke (B) which seats on disk.
  • Top of driver (C) where yoke and disk seat.
  • Bottom of driver (D).
  • Top of bearing (E).


A-Yoke, Inside
B-Yoke, Bottom
C-Driver, Top
D-Driver, Bottom
E-Bearing, Top

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

12. Align timing mark 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. Install and tighten to specifications.

Specification

Converging Disk Driver Cap Screws -Torque 340 N·m (250 lb-ft)

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A-Cap Screw and Washer
B-Disk Driver
C-Timing Marks

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14. Place disk (D) on driver in original position. (See Installing and Synchronizing Disks in this section.)

15. Lubricate gear case output shaft with multipurpose grease.

16. Insert cutterbar driveline through middle of converging drum (B). Slide splined yoke of driveline (A) onto splined shaft of gear case.

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.

17. Fasten with four locking cap screws. Tighten cap screws to specifications.

Specification

Disk-to-Driver Cap Screws -Torque 150 N·m (110 lb-ft)
Replace locking cap screws after removing and installing five times.

18. Adjust clearance between lower crop shield and disk (See Adjusting Lower Crop Shields in this section.).

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A-Cutterbar Driveline
B-Converging Drum
C-Cap Screw, M12 x 35 (4 used)
D-Disk

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IMPORTANT: When installing left-hand converging drum shield (A), adjust clearance between shield and converging drum according to specifications.

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

Specification

Shield-to-Converging Drum -Distance 5 mm (3/16 in.)

20. Remove wood block.

21. Rotate disks several times by hand to check synchronization. Make sure there is no interference between knives.

22. Lower front doors.

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A-Shield

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