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Sharpen the Mower Blades
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CAUTION:
DO NOT sharpen
mower blades while on unit. An
unbalanced
mower blade will
cause excessive vibration and
eventual damage to unit. Check
mower blade balance before
reinstalling
blades.
NEVER weld or straighten bent
blades.
1. Remove mower blade from unit.
Discard mower blade if:
More than 1/2 in. (1.27 cm) of metal is
removed.
Air lifts become eroded.
Blade is bent or broken.
2. Sharpen mower blade by removing an
equal amount of material from each end
of mower blade. DO NOT change angle
of cutting edge or round the corner of the
mower blade.
3. Check mower blade balance.
Slide mower blade on an unthreaded
bolt. A balanced blade should remain in
a horizontal position. If either end of
mower blade moves downward, sharpen
the heavy end until blade is balanced.
4. Install mower blade(s) on unit.
5. Tighten the bolts to a torque of
115-160 Ibf-ft (156-217 N°m).
DO NOT Sharpen to This Pattern
2
1/2 in. (1.27 cm)
3
OT0792
4
Sharpen to This Pattern
1. Cutting Edge
3. Air Lift
2. Square
Erosion
Corner
4. Air Lift
Figure 10
GB - 21
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