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

Regular Maintenance
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 23).
2. If there are no flats on the spindle shaft, wedge a
wooden block between the mower blade and the mower
deck housing to keepthe mower blade from turning.
inspecting the Mower Blades
, ILDANGER
Avoid injury! A worn or damaged blade can break, and
a piece of the mower blade couldbe 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
oncea year.
,, if the mower blade hits a solid object, stop the
engine immediately and inspectthe mower blade.
,, Never weld or straighten bent mower blades.
1. Removethe mower blade from the unit. Bee Removing
the Blade,
2. Inspect the mower blade (Figures 24 & 25). Discardthe
mower blade if it hasany 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 24).
B.) The air lifts are excessively eroded (B & C, Figure
25) 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 23. Loosening the Mower Blade for Removal
\
Figure 24, inspecting the Mower Blade Tips
A. Mower Blade Cutting Edge
B, Square Comer
C. Air Lift
D. WearMeasurement- DISCARDMower Blade lf greater
than .5" (12,7 ram)
®
Figure25. inspecting the Mower Blade Air Lifts
A. New Mower Blade
B, Mower Blade at WearLimit (A notch begins to form)
C. Mower Blade in Dangerous Condition (Notch measures .25" (6,35 ram) or greater DO NOT USE, Replace with new mower
blade.)
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