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Appendix #4 – Knife Replacement
1.
Measure the length of the inside of the rotor. (See Figure 1.)
2.
Add 5/8" to this measurement. The knife should cover half the thickness of the rotor end. (See
Figure 2.)
3.
Cut knife to length, (+/- 1/8"); a hot saw works best.
4.
Install knife with knife clamps.
5.
Use a feeler gauge set the knife clearance. For ambient temperature applications, the clearance
should be set at .008 to .010" between the knife and rotor. For elevated temperature applications,
the knife-to-rotor clearance should be set at half of the factory setting for rotor-to-housing
clearance. See page 5 of this Manual for information on rotor-to-housing clearance.
6. Tighten knife clamp bolts to 75-100 ft-lbs.
Rotor blade
Rotor end
Knife extends
under eyebrow
Updated June 2018
Figure 1
Figure 2
F igure 2
Eyebrow
Knife Clamp
Knife
Page 23
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