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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:v°s,d°up)/
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 ofI
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 4.1. Check torque
of blade retaining cap screw. Recommended
torque should be 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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