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Figure 25
1. Sail
2. Flat part of blade
Note: For best performance, install new blade before
cutting season begins. During the year, file down small
nicks to maintain the cutting edge.
DANGER
POTENTIAL HAZARD
A worn or damaged blade could break and a
piece of blade could be thrown into operator's
or bystander's area.
WHAT CAN HAPPEN
A thrown piece of blade could cause serious
personal injury or death to operator or
bystanders.
HOW TO AVOID THE HAZARD
Inspect blade periodically for wear or damage.
Replace a worn or damaged blade.
5. REMOVING BLADE—Grasp end of blade using a rag
or thickly padded glove. Remove blade nuts, anti-scalp
cup, accelerator, and blade (Fig. 24).
m-270
3. Wear
4. Slot formed
6. SHARPENING BLADE—Using a file, sharpen top
side of blade and maintain original cutting angle
(Fig. 26). The blade will remain balanced if same
amount of material is removed from both cutting
edges.
1. Sharpen at this angle only
IMPORTANT: Check balance of blade by putting it on
a blade balancer. An inexpensive balancer can be
purchased at a hardware store. A balanced blade stays
in a horizontal position and an unbalanced blade settles
to the heavy side. If blade is not balanced, file more
metal off cutting edge on heavy end of blade.
7. Reinstall sharp, balanced blade, accelerator, anti-scalp
cup, and blade nuts. Sail part of blade must point
toward top of mower housing to assure correct
installation. Tighten blade bolt to 20-37 N m
(15-27 ft-lb).
WARNING
POTENTIAL HAZARD
Operating mower without accelerator in place
could cause blade to flex, bend or break.
WHAT CAN HAPPEN
A broken blade could cause serious injury or
death to operator or bystanders.
HOW TO AVOID THE HAZARD
Do not operate mower without accelerator.
Lubrication
After every 25 operating hours or when season ends, pivot
arms must be lubricated.
1. Move rear wheel height-of-cut levers to center setting.
Wipe grease fittings with clean rag (Fig. 27). Install
grease gun onto fitting and gently apply 2 or 3 pumps
of #2 Multi-Purpose Lithium Base Grease. Excessive
grease pressure may damage seals.
18
m-153
Figure 26
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