Maintenance
GB–21
Blade Sharpening
POTENTIAL HAZARD
•
When sharpening blade, pieces of blade
could be accidentally thrown.
WHAT CAN HAPPEN
•
Thrown objects can cause serious eye
injury.
HOW TO AVOID THE HAZARD
•
Wear proper eye protection when
sharpening blade.
1.
Sharpen only the leading edge of blade with a
file or grinder. Do not sharpen beyond the
recommended area.
Note:
Blade should not be ground more than
5 inches (127 mm) from outside ends
and no less than 2 inches (51 mm)
from trailing edge (Fig. 32).
990
2”
(51 mm)
5”
(127 mm)
Figure 32
Blade Balancing
1.
Check the balance of blade by placing the center
hole of blade over a nail or screwdriver shank
clamped horizontally in a vise (Fig. 33).
2.
If either end of blade rotates downward, grind or
file that end (not the cutting edge). Blade is
properly balanced when neither end drops.
1007
Figure 33
Blade Installation
1.
Install blade driver onto crankshaft (if removed)
(Fig. 31).
2.
Locate blade over lugs of blade driver with
curved ends toward mower housing.
1025
Figure 34
3.
Torque blade nut to 560 in.–lb. (47 ft.–lb.)
(63 N
m).
