EN - 22
Remove Blades
1. Stop engine, remove key and wait for
moving parts to stop and for hot parts to
cool.
2. Disconnect spark plug wires.
See Figure 20.
3. Remove hardware securing blades to
spindles and remove blades. Retain all
hardware for reinstallation.
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 21.
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 20.
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.
1. Mower Blade
2. Spindle
Figure 20
1
2
CAUTION: Unbalanced blades
cause excessive vibration and
eventual damage to unit.
Balance blades before
reinstalling on unit.
NEVER weld or straighten
blades.
Figure 21
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
1
3
1
2
4
DISCARD if more
than 1.3 cm (1/2")
DO NOT sharpen to this pattern.
Sharpen to this pattern.
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