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www.ferrisindustries.com
Regular Maintenance
Figure 34. 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
A
B
Figure 32. Sharpening the Mower Blade
A. Mower Blade Bevel
B. Mower Blade Cutting Edge
Figure 33. Balancing the Mower Blade
A. Nail
A
Sharpening the Mower Blades
1. Sharpen the mower blade with a grinder, hand file,
or electric blade sharpening.
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 32) 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 blade before installing.
Balancing the Mower Blades
1. Clean the mower blade to remove any dried grass
or other debris.
2. See Figure 33. Put the mower blade on a nail in a
vise and turn the 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 34. Secure with the mower blade mounting
bolt and flat washer (A & B, Figure 34) and torque
to 70 ft. lbs (94 Nm).
2. 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 mower
blades or working near 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.