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Maintenance
Regular Maintenance
Figure 28. Tightening the Mower Blade for Installation
A. Mower Blade Mounting Bolt
B. Flat Washer
C. Mower Blade Air Lift (Points Up For Installation)
D. 4 X 4 Wooden Block
D
A
B
Sharpening the Mower Blade
1. Sharpen the mower blades with grinder, hand file, or
electric blade sharpener.
2. Sharpen the mower blade by removing an equal amount
of material from each end of the mower blade.
3. Keep the original bevel (A, Figure 26) when grinding. DO
NOT change the mower blade bevel.
4. The mower blade should have a maximum 1/64” (0,40
mm) cutting edge (B) or less.
5. Balance the mower blades before installing.
Balancing the Mower Blades
1. Clean the mower blade to remove any dried grass or
other debris.
2. See Figure 27. Put the mower blade on a nail in a vise
and turn the mower blade to the horizontal position.
3. Check the balance of the mower blade. If either end of
the mower blade moves downward, sharpen the heavy
end until the mower blade is balanced.
See Sharpening
the Mower Blades
for proper sharpening instructions.
4. Repeat the process until the mower blade remains in the
horizontal position.
Reinstalling the Mower Blades
1. Reinstall each mower blade with the air lifts pointing up
towards the mower deck as shown in Figure 28. Secure
with the mower blade mounting bolt and flat washer (A
& B, Figure 28) and torque to 70 ft. lbs (94 Nm).
2. If there are no flats on the spindle shaft, wedge a
wooden block between the mower blade and the mower
deck housing to keep the mower blade from turning.
CAUTION
Avoid injury! Mower blades are sharp.
• Always wear gloves when handling the mower
blades.
• Always wear safety eye protection when grinding.
CAUTION
Avoid injury! Keep mower blades balanced.
• An unbalanced mower blade can create excessive
vibration and damage the unit or cause mower blade
failure.
A
B
Figure 26. Sharpening the Mower Blade
A. Mower Blade Bevel
B. Mower Blade Cutting Edge
Figure 27. Balancing the Mower Blade
A. Nail
A