Owner manual

Page 28 of 48
2. Remove the downstroke cover screws at the rear of the
machine (this includes the safety switch actuator arm screw),
and carefully slide the cover(s) out of the machine.
NOTE: Under normal operating use, the cutting edge of the rotor
knives will eventually become dulled, thereby resulting in reduced
cutting efficiency. The blunt knives may either be re-ground to
restore the cutting edge, or replaced with new knives, when
regrinding is not possible. Maximum regrind is 1/4”
3. Remove the screws holding the knives to the rotor and
carefully remove the knives. If new rotor knives are being
fitted, set back the bed knives to clear the rotor knives so that
the rotor can revolve freely. (Refer to Sections 6.2.1.a and
6.2.1.b. on pages 24-27.)
4. Clean the knife seats and replace the knives. Make certain that
they are seated correctly before proceeding further.
5. Lightly tighten the screws and check that a 0.0015” (0.04 mm)
feeler gauge will not pass between the back of the knives and
the knife seat. Tap the knife gently with a rawhide hammer if
necessary to close the clearance gap.
NOTE: The knives must be replaced in complete matched sets,
otherwise it will not be possible to obtain an even clearance
between the rotor knives and bed knives.
6. Tighten the rotor knife screws evenly and torque the high-
tensile 16 mm screws to 200 Lbs./Ft (271 Nm).
7. Check that a 0.0015” (0.04 mm) feeler gauge will not pass
between the back of the knives and the knife seats. If
necessary, readjust the knives.
NOTE: All screw tightening torque figures are for unlubricated
thread conditions. Screw threads should be wiped with an oil-
dampened cloth before installation to prevent galling.
NOTE: The rotor screws should be replaced with new screws
every sixth knife change to reduce the risk of screw failure due to
overstretching. Screws must be replaced with the type specified in
the Spare Parts List.
8. Adjust the clearance between the upstroke bed knives and the
rotor knives, as detailed in Section 6.2.1.a on page 24.
9. Adjust the clearance between the downstroke bed knives and
the rotor knives as detailed in Section 6.2.1.b on page 26.
10. Upon completion of all adjustments and settings, check that the
cutting chamber is clear of any parts or materials.