Hansa C65RX Operation, Maintenance And Safety Manual page 24

3
Sharpen the knives:
4
Reinstall the knives:
5
Rotor
disc
6
Top view: Knife and anvil set-up
Hansa C65RX O&M Manual – OM-029 First Release 4/05/2021
© Hansa Chippers 2021
MIN 96 mm
36 °
Anvil
Bearing
Locking nuts
Spring washers
Rotor disk
Knife
Clamping bolts
Knife
3 mm
clearance
Measure the width of the knife and check
that it will be at least 96 mm after sharpening.
If the knives will be shorter than 96 mm, then
the knives should be replaced. Please contact
your nearest Hansa dealer.
Sharpen the knives on a surface grinder. A
cutting angle of 36° is critical for the
performance of the chipper. Make sure there is
plenty of coolant used when grinding to avoid
softening of the steel knives. Ensure that the
knives are evenly sharpened on both edges.
Note: You do not need to sharpen your knives
unless both sides of the reversible knives have
been used.
Clean all mounting surfaces and remount the
knives in the reverse procedure. Torque the
knife clamping nuts up to 190 Nm. Note:
Torque the nuts while holding the bolt head
stationary, to ensure correct torque.
After sharpening, the width of the knives will
have been reduced, therefore the gap between
the knives and anvil may require adjustment.
There should be 3 mm of clearance between the
knife and the anvil. If there is not enough
clearance, the knife edge may touch the anvil
through deflection when
branches and damage the sharp edge. Too
much clearance will allow small twigs and
fibrous materials to be dragged through
without being cut.
To adjust the gap between the knives and the
anvil, first loosen the locking nuts from the
adjustment bolts on the anvil mounting plate
using a 16 mm spanner. Now tighten or loosen
the two adjustment bolts. Tightening these
cutting heavy
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