Servicing The Mower Blades - Snapper SW20 Series Operator's Manual

Servicing The Mower Blades

Removing the Mower Blade
CAUTION
Avoid injury! Mower blades are
sharp.
Always wear gloves when handling mower blades or
working near blades.
1. To remove the mower blade, use a 1" wrench on the
flats of the spindle shaft and remove the mower blade
mounting bolt with a 15/16" wrench (Figure 17).
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.
Inspecting the Mower Blades
1. Remove the mower blade from the unit. See
Removing the Blade.
DANGER
Avoid injury! A worn or damaged
blade can break, and a piece of the
mower blade could be thrown into
the operator's or bystander's area,
resulting in serious personal injury
or death.
• Inspect the mower blade every 25 hours or at least once
a year.
• If the mower blade hits a solid object, stop the engine
immediately and inspect the mower blades.
• Never weld or straighten bent mower blades.
2. Inspect the mower blade (Figures 18 & 19). Discard
the mower blade if it has any of the below
conditions.
A.) Has more than .5" (12,7 mm) of the mower blade
metal removed from previous sharpening or wear (D,
Figure 18).
B.) The air lifts are excessively eroded (B & C, Figure
19) and the notch (C) is .25" (6,35 mm) deep or greater.
C.) Mower blade is bent or broken.
3. If the cutting edges are not sharp or have nicks, sharpen
the blades. See Sharpening the Mower Blades.
Figure 19. inspecting the Mower Blade Air Lifts
A. New Mower Blade
B. Mower Blade at Wear Limit (A notch begins to form)
C. Mower Blade in Dangerous Condition (Notch measures .25" (6,35 mm) or greater DO NOT USE.)
A
Regular Maintenance
Figure 17. Loosening the Mower Blade for Removal
B
C
D
C
Figure 18. inspecting the Mower Blade Tips
A. Mower Blade Cutting Edge
B. Square Corner
C. Air Lift
D. Wear Measurement - DISCARD Mower Blade If
greater than .5" (12,7 mm)
B
A
A
C
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