GB - 23
Sharpen the Mower 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 lbf-ft (156-217 N•m).
BATTERY
Unit comes equipped with a maintenance-
free battery that requires no regular
maintenance except cleaning the terminals.
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.
WARNING: AVOID INJURY. Read
and understand entire Safety
section before proceeding.
WARNING: Battery posts,
terminals and related accessories
contain lead and lead compounds,
chemicals known to the State of
California to cause cancer and
reproductive harm. Wash hands
after handling.
1. Cutting Edge
2. Square Corner
3. Air Lift Erosion
4. Air Lift
Figure 10
DO NOT Sharpen to This Pattern
Sharpen to This Pattern
DISCARD if More Than
1/2 in. (1.27 cm)
1
1
4
2
4
3
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