Knife Inspection - Vermeer BC1200XL Operator's Manual

Knife Inspection

• Cracks — Thoroughly clean the knives and inspect both sides of each knife for
cracks. If any are found, discard the knife and install a new one.
Cracks (1) that start at the mounting hole and progress outward result from the
mounting bolts being improperly torqued.
NOTE: Knife sizes and number of mounting holes may vary between machine models.
If cracked knives are reused, the cracks will extend across the knife and the knife can
separate from the cutter drum.
• Distortion — Check the mounting side of the knife for distortion. Bolting a
distorted knife to the cutter drum will add stresses in the knife and possibly
cause knife cracking and failure.
Place a straightedge (2) on the mounting side of the knife (3) and parallel to
Step 1:
the mounting holes as shown.
Move straightedge slowly across the knife surface, and monitor for any light
Step 2:
that shows between the knife and straightedge. If any light appears between the knife surface and the
straightedge, this indicates that the knife is distorted, and the knife must be replaced.
Step 3: Turn straightedge perpendicular to mounting holes and repeat Step 2.
61-4 Knife/Drum Maintenance
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BC1200XL Brush Chipper