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1. Remove mower blade from unit. See
“REPLACING MOWER BLADE” on
page 24.
Gravely recommends having mower blades
sharpened by a professional. Contact your
Gravely dealer.
Discard mower blade if (Figure 16):
• more than 1/2" (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
“REPLACING MOWER BLADE” on
page 24.
SERVICING THE BATTERY
NOTE: Unit comes equipped with a
maintenance-free battery that requires no
regular maintenance except cleaning the
terminals.
Factory-Installed Battery Removal
and Installation
Remove Factory-Installed Battery
(Figure 17)
1. Lower deck to the lowest cutting height.
2. Tip seat forward. See “TIPPING SEAT
FORWARD” on page 22.
3. Disconnect negative (–) cable first, then
positive (+) cable.
NOTE: Do not cut cable tie securing positive
cable to battery hold-down bracket unless
installing U1 battery.
Figure 16
Sharpen to this Pattern
Discard if
more than
1/2"
(1.27 cm)
DO NOT Sharpen to this Pattern
1. Air Lift Erosion
2. Cutting Edge
1
2
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.
Figure 17
1. Positive (+) Terminal
2. Positive (+) Cable
3. Battery Hold-Down Bracket
4. Battery
5. Negative (–) Terminal
6. Negative (–) Cable
7. Nut
8. Bolt
3
5
1
2
4
6
7
8