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Section 4 - REPAIR & ADJUSTMENTS
_IL
WARNING
,_
DO NOT attempt any maintenance,
adjustments
or
service
with
engine
and
blade
running.
STOP
engine and blade. Disconnect
spark plug wire and
secure
away
from
spark
plug.
Engine
and
components
are HOT. Avoid serious burns, allow
sufficient
time for
all components
to cool. Wear
heavy leather
gloves
when
handling
or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.
4.1
MOWER BLADE REPLACEMENT
4.1.1. STANDARD BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive
wear or damage. See Figure 4.1.
FIGURE 4.1
2. Replace the blade if it is badly chipped, bent,
noticeably out of balance or has cracks or notch in
either tip. See Figure 4.1. Replace with new blade.
MAKE SURE THAT
BLADE HUB IS
SEATED
BLADE
BETWEEN
HUB
FLANGES
_ii),""CONEWASHER /
_
<Cono:vo
s,d° u p)/
CAPSCREW
FIGURE 4.2
4. Sharpen blade on a grinding wheel at an angle
of 22 to 28 degrees.
DO NOT sharpen
blade
beyond original cutting edge. See Figure 4.3.
DO NOT SHARPEN
BEYOND ORIGINAL
_'_I
_
" "..
CUTTING
EDGE
22.18o__
\
.._RIGINAL
CUTTING
EDGE
FIGURE 4.3
_i
WARNING
DO NOT use a cutting blade that shows signs
of I
excessive
wear
or
damage.
Refer
to
Section I
"MOWER BLADE REPLACEMENT"
for proper blade I
inspection
and service procedures.
I
5. Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6. Reinstall blade. See Figure 4.2. Check torque
of
blade
retaining
cap
screw.
Recommended
torque should be 30 to 40 ft. Ibs.
4.1.2.
BLADE SHARPENING
1. Disconnect
spark plug wire and secure end
away from plug.
2. Tilt mower up on its rear wheels.
Do not tilt
mower with spark plug or carburetor down.
3. Remove blade. See Figure 4.2.
12
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