Replacing Cutterbar Knife

1. Turn knob (A) counter-clockwise and remove left-hand end shield (B).

2. Place left-hand end shield (B) on light arm storage bracket (C).

NOTE: If divider will not pivot upwards refer to Predelivery Instructions for shipping bolt removal.

3. Raise left-hand row divider.

A-Knob
B-Left-Hand End Shield
C-Storage Bracket

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4. Lift lever (A) to release tension on knife drive belt (B) and remove belt from rear sheave.

A-Lever
B-Knife Drive Belt

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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 to disconnect knife from drive.

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

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 Screw (2 used)
B-Cutterbar Hold-Downs
C-Cap Screw
D-Knife Head Bearing

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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, or any time the system has been previously operated with improper knife head alignment.

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

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

15. Remove self-locking pliers.

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

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

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

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

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

Specification

A-Cap Screw
B-Cap Screws (2 used)

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IMPORTANT: Setting of cutterbar head is critical. If cutterbar head is not set correctly, binding and gear box failure may 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 a gap exists. If there is no gap see Aligning Knife Head and Knife Drive Alignment in this section.

A-Knife Head
B-Bearing Shield
C-Gap
D-Gap (Two Locations)
E-Knife Back

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NOTE: While tightening bolt to specification use a pry bar as shown to avoid twisting of the cutterbar head (A) and loss of knife head settings.

20. Tighten cap screw to specification.

Specification

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

A-Cutterbar Head

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22. Lift up on handle (A) and install belt (B).

23. Close left-hand row divider.

24. Install left-hand end shield.

A-Handle
B-Knife Drive Belt

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