Hansa C7eu O&M Manual - OM-019 revision B 03/09/2018
© Hansa Chippers 2018
15
Remove the knives for sharpening
Open the rotor housing cover by removing the two outlet chute locking bolts with a 13 mm spanner, then lift the
rotor housing cover to access the cutting rotor. Rotate the cutting rotor to gain access to the knives, then engage
the belt drive to stop the cutting rotor from rotating.
Use a 13 mm spanner to remove the knives from the rotor. There are three
nuts you must remove to do so.
If the bolt head turns, hold it with a 6 mm hexagonal Allen key
Note
:
Do NOT
try to loosen the bolt with the hexagonal Allen key
Be careful not to drop the nuts, bolts, washers or knives into the
chipper
A stick magnet can be used to retrieve them if this does occur
Measure the width of the knife and check that it will be at least 35 mm
after sharpening. If the knives will be shorter than 35 mm, then the knives
should be replaced. Please contact your nearest Hansa dealer.
Sharpen the knives
Sharpen the knives on a surface grinder. A cutting angle of 40 ° is critical
for the performance of the chipper. Make sure plenty of coolant is used
when grinding to avoid softening of the steel knives.
Reinstall the knives
Clean all mounting surfaces and remount the knives in the reverse procedure. Tighten the nuts using a torque
wrench to 22 Nm.
1
2
3
MIN 35 mm
4
5
40 °