Maintenance
EN-18
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. 26).
990
2”
(51 mm)
5”
(127 mm)
Figure 26
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. 27).
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 27
Blade Installation
1.
Install blade driver onto crankshaft (if removed)
(Fig. 25).
2.
Locate blade over lugs of blade driver with
curved ends toward mower housing and secure
with blade nut (Fig. 28).
1025
Figure 28
3.
Torque blade nut to 560 in.–lbs. (47 ft.–lbs.)
(63 N
m).
Note:
Blade nut must be replaced after
installing and removing four (4) times.
Locking feature will decrease and nut
could loosen if not replaced.
4.
Connect spark plug wire when maintenance is
completed (Fig. 22).
