GB - 21
Adjusting The Mower Deck To Adjust
Mower Blade Height And Pitch
(Figure 12):
NOTE: Adjusting the mower deck will adjust
he height and pitch of the mower blades.
1. Adjust the trunnions first and re-take the
three measurements required to level
and adjust the pitch of the mower deck.
These measurements are:
a. The distance from the mower
blades to the ground.
b. The forward pitch of the mower
blades.
c. The pitch of the mower blades
from side-to-side.
2. Repeat step 1 as needed until all three
measurements are within the tolerances
specified.
REPLACING MOWER BLADE
Remove (Figure 13)
1. Block mower blades to prevent rotation.
2. Remove mounting hardware and mower
blades from mower deck.
Install (Figure 13)
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).
SHARPENING MOWER BLADE
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 14):
• 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.
CAUTION: Mower blades are
sharp and can cut you. Wrap the
blades or wear gloves, and use
extra caution when servicing
them.
Figure 12
1. Trunnion 2. Mower Deck
1
2
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.
Figure 13
2
1. Flat Washer
2. Bevel Washer
3. 5/8-inch Hex Bolt
4. Mower Blade
3
4
1
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