Remove and Install Cutterbar Knife

causym CAUTION: To reduce risk of personal injury, always wear gloves when handling knives. Stand to the rear of knife when removing or installing.

1. Raise platform completely and engage feeder house safety stop.

2. Raise reel completely and engage safety stops on reel lift cylinders.

3. Set parking brake, turn OFF engine and remove key.

4. Remove side shields (See REMOVE AND INSTALL SIDE SHIELDS procedure in this section).

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5. Manually rotate knife drive until knife head cap screws (A) are accessible.

6. Loosen cap screw (C).

7. Remove cap screws (A) to disconnect knife from drive.

NOTE: It may be necessary to loosen hold-downs (B) slightly to allow knife to slide freely.

8. Pull knife through guards until bearing assembly (D) is separated from knife drive gearbox.

9. Remove cap screw (C).


A-Cap Screws
B-Cutterbar Hold-Downs
C-Cap Screw
D-Knife Head Bearing

H90674
H90680
H92138

Knife Shown Removed for Clarity

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10. Using a pair of self-locking pliers (A), apply light pressure to relief area of knife head to expand it.

11. Remove bearing assembly (B).

12. Remove spanner ring (C).

IMPORTANT: Spanner ring maintains a smooth drive operation and proper knife head alignment. Replace spanner ring any time a major component failure has occurred in knife head or knife drive gearbox area.

Replace spanner ring any time the system has been previously operated with improper knife head alignment.

13. Install new spanner ring (C) in knife head of newly installed knife.

14. Install bearing assembly (B) in knife head.

15. Remove self-locking pliers.


A-Self-Locking Pliers
B-Bearing Assembly
C-Spanner Ring

H92139
H92140

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16. Install cap screw (A) but do not tighten at this time.

17. Push knife back into guards until bearing contacts drive. Ensure that drive is positioned correctly to accept bearing and tighten cap screw (B) to specification.

Specification

Knife Head Drive Cap Screws (B) -Torque 130 N·m (96 lb-ft)

IMPORTANT: Failure to tighten cap screws (B) can result in knife and drive damage.

H90805


A-Cap Screws
B-Cap Screw

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IMPORTANT: Setting of cutterbar head is critical. If cutterbar head is not set correctly, binding and gearbox failure can occur.

18. Set vertical position and angle of knife head (A) so cutting surface is centered in guard slot and is parallel to bottom of guard slot at (C).

NOTE: Make sure knife head (A) does not contact bearing shield (B).

19. Check fore/aft gap distance (D) at both locations between knife back (E) and first guard to ensure that a gap exists. If there is no gap see ALIGN KNIFE HEAD AND KNIFE DRIVE procedure in this section.


A-Knife Head
B-Bearing Shield
C-Gap
D-Gaps
E-Knife Back

H90675
H64729

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NOTE: While tightening cap screws to specification use a pry bar to avoid twisting of the cutterbar head and loss of knife head settings.

20. Tighten cap screws (A) to specification.

Specification

Knife Head Cap Screw -Torque 130 N·m (96 lb-ft)

21. Verify that the knife section is still properly positioned in the first guard slot after the knife head cap screw is fully tightened.

22. See ALIGN KNIFE HEAD AND KNIFE DRIVE procedure in this section to ensure that cutterbar is properly installed.

23. Reinstall side shields (see REMOVE AND INSTALL SIDE SHIELDS procedure in this section).

H90678


A-Knife Head Cap Screws

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