Gravely 915140 Owner's/Operator's Manual page 22

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1. Spindle
2. Blade
3. Washer
4. 5/8 in. Nut
Figure 15
SHARPENING MOWER BLADE
CAUTION: DO NOT sharpen
mower blade while on unit. An
unbalanced mower blade will
cause excessive vibration and
eventual damage to unit. Check
mower blade balance prior to
reinstalling mower blades.
NEVER weld or straighten mower
blades.
1. Remove mower blade from unit (see
REPLACING MOWER BLADE on
page 21).
Gravely recommends having mower blades
sharpened by a professional. Contact your
Gravely dealer.
Discard mower blade if (figure 16):
• more than 1/2 in. (1.27 cm) of metal is
removed.
• the air lift erosion area is eroded.
• the mower blade is bent or broken.
Do not change angle of cutting edge or round
the corner at the end of mower blade.
2. Sharpen mower blade by removing an
equal amount of material from each end
of mower blade.
3. Check mower blade balance by sliding
mower blade on an unthreaded bolt. If
blade is balanced, it should remain in a
horizontal position. If either end of
mower blade moves downward, sharpen
the heavy end until mower blade is
balanced.
4. Install mower blade on unit (see
2
DO NOT Sharpen to this Pattern
3
Sharpen to this Pattern
4
Discard if
more than
1/2 in.
(1/27 cm)
SERVICING THE BATTERY
NOTE: Unit comes equipped with a
maintenance-free battery that requires no
regular maintenance except cleaning the
terminals.
Battery Removal and Installation
Remove (Figure 17)
1. Tip seat forward (see TIPPING SEAT
2. Disconnect negative (–) cable first, then
3. Remove battery hold-down bracket and
GB - 22
REPLACING MOWER BLADE on
page 21).
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1. Air Lift Erosion
2. Cutting Edge
Figure 16
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.
FORWARD on page 18).
positive (+) cable.
battery from unit.
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