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Knife Installation
Clean and inspect all cutter drum components as per the preceding instructions.
Step 1:
Step 2:
Lock cutter drum.
Step 3:
Install knife (1) with the bevel oriented as shown, and with thread bar (2) in place
inside drum.
IMPORTANT: On resharpened knives, measure the distance from the mounting holes to the
sharpened edges. Mount knives so edges with the same measurement are oriented the same way
at both locations.
Step 4:
Lubricate bolts (3) with light oil and install. Lightly tighten all four bolts to hold the
knife in place.
WARNING: Mounting bolts (3) must be replaced each time knives are sharpened or replaced. Bolts
may be reused ONLY ONCE when rotating knife to its second cutting edge. Failure to replace bolts
can cause knife/drum separation resulting in death or serious injury, and machine damage.
Also, to prevent bolt damage, do not use a power or impact tool to install knife/drum bolts.
Step 5:
Torque bolts with a torque wrench to 210 ft-lb (285 Nm) beginning with the center bolts. Torque in the
same sequence again after the last bolt is tightened.
WARNING: Overtightened bolts can cause knife distortion, allowing wood to pack under the knife.
Distorted knives can crack and fail resulting in death or serious injury, and machine damage. Use a
straightedge and check all knives for distortion; discard any that are distorted.
Step 6:
Unlock cutter drum and rotate 1/2 turn to the next cutter knife.
Step 7:
Lock cutter drum.
BC1200XL Brush Chipper
1
2
Knife/Drum Maintenance 61-9
3
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