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Owner Service 13
15148 (Rev. 2/9/2007)
Sharpening
NOTICE
■ When sharpening blades, be sure to balance
them. Unbalanced blades will cause excessive
vibration which can damage blade spindle bear-
ings. Vibration may also cause structural cracks in
mower housing.
Figure 5. Blade Sharpening
Remove blades. Always sharpen both ends at the
same time to maintain balance. Follow the original
sharpening pattern. Do not sharpen blade to a razor
edge. Leave from 1/32" to 1/16" blunt edge. Do not
sharpen backside.
■ Your dealer can supply genuine replacement
blades. Substitute blades may not meet original
equipment specifications and may be dangerous.
Removal and Installation
Wedge a block of wood between blade and mower
housing, or install blade wrench over spindle pulley
bolts to prevent spindle from rotating while removing
bolts. Loosen the Nylok blade bolt, which has
left hand
threads
.
L59 Removal
Remove the bolt, two cup washers, flat washers and
blade. The shoulder washer will not normally come off
the machine unless intentionally removed.
L59 Installation
Install shoulder washer (if removed) small end up.
Position blade. Be sure cutting edge is positioned to
lead in counter-clockwise rotation, as viewed from top
of mower.
Install flat washer, cup washers and bolt. Torque bolt to
170 lbs-ft.
Excessive blade slippage can cause the cup washers
to burn and lose their clamping force. If this happens,
the cup washers must be replaced.
Figure 6. Blade Assembly
L306 Removal
Remove bolt, special heat-treated washer, sleeve, cup
washers, shim washer, blade, blade stop and clutch
disc. The shoulder washer will not normally come off
the machine unless intentionally removed.
A CAUTION
1. Blade Wrench
2. Shoulder Washer
3. Blade
4. Flat Washer
5. Cup Washer
6. Bolt (special,
left hand threads
)