Replacing Mower Blade; Sharpening Mower Blade - Gravely ZT1640 Owner's/Operator's Manual

Adjustment Pin
Figure 14

REPLACING MOWER BLADE

Remove (Figure 15)
CAUTION: Mower blades are sharp
and can cut you. Wrap the blades or
wear gloves, and use extra caution
when servicing them.
1. Block mower blades to prevent rotation.
2. Remove mounting hardware and mower
blades from mower deck.
Install (Figure 15)
1. Install mower blades on mower deck
with mounting hardware.
2. Torque 5/8-inch hex bolt to 80 to
120 lbf-ft (108 to 163 N•m).
1
4
1. Flat Washer
2. Bevel Washer
Figure 15
Deck Access
Plate
Knob
2
3
3. 5/8-inch Hex
Bolt
4. Mower Blade
OE0039

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 17).
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.
GB - 17