Gravely Promaster 266 - Page 23

GB - 23
SHARPENING MOWER BLADE
NOTE: If mower is used under sandy soil
conditions, replace mower blades when air
lifts become eroded through at ends
(figure 12).
1. Remove mower blade from unit.
Discard mower blade if (figure 12):
• 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
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 on unit.
ANTI-SCALP ROLLER
ADJUSTMENT
The anti-scalp rollers are set at the factory for
typical mowing height, but can be adjusted for
high or low cutting conditions (figure 13).
Anti-Scalp rollers are intended to prevent
lawn scalping, not to control cutting height.
For a very high cutting height, set the anti-
scalp rollers in the lowest position on the
bracket.
For a very low cutting height, set the anti-
scalp rollers in the highest position on the
bracket.
NOTE: There are four anti-scalp rollers on
the outside of the mower deck and two anti-
scalp rollers on the inside of the mower deck.
Make sure all anti-scalp rollers are set at the
same height.
MOWER LIFT PEDAL
ADJUSTMENT (992152, 161, 162,
165, 175, 176)
The mower lift pedal can be adjusted to
decrease or increase the amount of force
required to lift the mower deck.
NOTE: Decreasing the amount of force
required to lift the mower deck will increase
the mower deck’s bouncing. Increasing the
amount of force required to lift the mower
deck will decrease the mower deck’s
bouncing.
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.
Figure 12
OF3310
1
2
DO NOT Sharpen To This Pattern
Sharpen To This Pattern
DISCARD if more
than 1/2 in. (1.27 cm)
1. Air Lift Erosion Area
2. Cutting Edge
OF3590
Figure 13
Lowest
Cutting
Height
Highest
Cutting
Height