EN - 19
Sharpen Blades
1. Remove blades. Discard blades if:
• More than 1.3 cm (1/2") of metal is
removed.
• Air lifts are eroded.
• Blades are bent or broken.
2. File or grind an equal amount of material
from each cutting edge of the blade until
sharp. DO NOT change angle of cutting
edge or round the corner of the blade.
See Figure 18.
3. Check blade balance by sliding blade on
an unthreaded bolt. If blade does not
remain horizontal, sharpen the heavy end
until blade is balanced.
Install Blades
See Figure 17.
1. Reinstall blades and secure with original
hardware. Torque to 156 N•m – 217 N•m
(115 lb-ft – 160 lb-ft).
CAUTION: DO NOT sharpen
blades while attached to unit.
CAUTION: Unbalanced blades
cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades.
Figure 18
DO NOT sharpen to this
pattern.
Sharpen to this pattern.
DISCARD if more than
1.3 cm (1/2")
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
1
1
2
3
4
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