Manual Sharpening of Cutterhead Knives

General

causym CAUTION: Fan and cutterhead may continue to rotate for several minutes after power is shut off. To avoid bodily injury, do not open or remove any doors or shields until all rotating parts have stopped completely.

IMPORTANT: Make sure that cutterhead can rotate freely.

NOTE: Always use the automatic knife sharpening function for sharpening the cutterhead knives. The manual knife sharpening function should only be used in case of malfunction of the automatic knife sharpening.

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Preparations:
  • Move front shield in vertical position or lower harvesting unit to ground.
  • Open upper foldable guard (A) above the cutterhead.
  • Open large foldable guard (B).
  • Pull out locking rod (C) of cutterhead frame.
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  • Fully raise rotor guard (A) by sliding lever (B) rearward until it engages in its locking position (C).
  • Loosen cable clamp fixing screw (D) through opening (E) as shown.


A-Rotor guard
B-Lever
C-Locking position
D-Fixing screw
E-Opening for cable clamp

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IMPORTANT: Do not remove fixing screw (D)

  • Screw locking rod (A) of cutterhead frame into sharpening stone carrier (B) as shown.
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  • The two front shift rods (A) and (C) on length-of-cut transmission must be in neutral.
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  • With kernel processor/power chute installed, the drive belt should be locked out to disengage kernel processor or power chute drive belt.
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  • Close cutterhead guards (A) and (B).
  • Start engine and run at maximum speed.
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Starting sharpening procedure
  • Engage cutterhead by means of switch (A). Cutterhead will rotate in reverse direction.
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NOTE: If switch (A) is already in "On" position when starting engine, the cutterhead cannot be reversed. Move switch to "Off" position for at least one second and then to "On" position again. The cutterhead will start turning (in reverse direction) after two or three seconds.

  • Slide the stone at a uniform rate of travel along the full width of the cutterhead (this should take 4-5 seconds).

    causym CAUTION: Shut off cutterhead drive by means of switch (A) and engine before checking knives. Cutterhead may continue to rotate for several minutes. Wait for cutterhead to stop rotating before opening guards.

  • At the end of each R.H. stroke, the ratchet (B) will advance one tooth more to lower the stone.

    NOTE: For the last six strokes, only slide the stone without engaging the ratchet (stop when ratchet latch (C) is about 20 mm (0.8 in.) from the ratchet teeth).

  • Check knives often to avoid excessive sharpening.
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After finishing sharpening procedure
  • Position stone to L.H. side of housing so that cable clamp fixing screw (A) can be tightened through opening (B) as shown.
  • Remove rod and store it back in cutterhead frame (not illustrated).
  • Engage kernel processor/power chute drive belt.
  • Install cutterhead guards.

IMPORTANT: Adjust stationary knife every time cutterhead knives have been sharpened.

Manual stationary knife adjustment: see this Section. Automatic stationary knife adjustment: see Section "Warning Devices and Monitors".

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