MAINTENANCE & AJUSTEMENTS
89
KNIFE ADJUSTMENT
FIGURE 105
WARNING: Always disconnect the harvester from the tractor for the knife adjustment operation.
WARNING: Always proceed with the knife adjustment with great precautions.
WARNING: Be careful when working inside the cutting chamber. A piece of wood should block the cutting head
in order to prevent any sudden rotating motions from the latter.
The Forage Harvester knives should be readjusted after successive grindings have shortened them by approximately 1/4”
(6mm) since the shear bar cannot be moved forward by more than this distance.
Figure 105 Knife replacement
To adjust the knives:
1. The day prior to adjusting the knives (item 2), clean and apply oil on all cutter head bolts (item 1).
2. Remove the shear bar, lift the sharpening assembly and cutter head cover (or the whole cutter head shield
assembly and rack-and pinion assembly (items 3 and 4) for easier access.
3. Loosen the knife bolts (item 1) and adjusting screws (item 1) supporting the knives.
4. Locate the round guide bar which is stored above the feed rolls. Insert the bar in the holes meant for this
operation on the side of the frame above the cutterhead (see arrow). The bar is used as a guide for the knife
adjustment.
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