Hansa C13 O&M Manual - OM-007 Revision L 28/06/2021
© Hansa Chippers 2020
16
After sharpening, the width of the knives
will have been reduced, therefore the gap
between the knives and anvil may require
adjustment. This gap is tapered out slightly
to allow for a small amount of movement in
the cutting rotor as it bites into the wood.
If there is not enough clearance, the knife
edge may touch the anvil through
deflection when cutting heavy branches
and damage the sharp edge. Too much
clearance will allow small twigs and fibrous
materials to be dragged through without
being cut.
Adjust the knife in or out using the two
adjustment bolts to achieve the correct
clearance between the knife and anvil. The
clearance between the knife and anvil
should be approximately 1 mm on the
inside closest to the bearing and 3 mm on
the outside closest to the edge of the
cutting rotor (refer to diagram for more
detail).
After the correct clearance is set, fully
tighten the clamping bolts
using a torque
wrench to 35 Nm and tighten the locking
nuts on the adjustment bolts.
Note:
Before adjusting the knives, ensure
the gap between the holding block and the
anvil is 4 - 5 mm. If not, then the anvil can
be adjusted through the mounting slots.
Once the position has been set, tighten the
three M10 countersunk anvil bolts and
torque to 50 Nm, then make further
adjustments with the knives as described
above.
Turn the cutting rotor slowly by hand to
check that it turns freely.
7
Anvil
Cutting
rotor
Knife
1 mm
clearance
3 mm
clearance
Bearing
Top view: Knife and anvil set-up
Correct knife angle Incorrect knife angle
