11
Section 4 - REPAIR & ADJUSTMENTS
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.
Follow
WARNING
statement found on this page.
2.
Inspect blade frequently for signs of excessive
wear or damage. See Figure 4.1.
FIGURE 4.1
WARNING
DO NOT use a cutting blade that shows signs of
excessive wear or damage. Refer to Section
“MOWER BLADE REPLACEMENT” for proper blade
inspection and service procedures.
4.1.2. BLADE SHARPENING
1.
Follow
WARNING
statement found on this page.
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.
FIGURE 4.2
4.
Sharpen blade on a grinding wheel at an angle of
22 to 28 degrees. DO NOT sharpen beyond original
cutting edge. See Figure 4.3.
FIGURE 4.3
5.
Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6.
Reinstall blade. Refer to Section “MOWER
BLADE REPLACEMENT”. Check torque of blade
retaining cap screw. Recommended torque should
be 30 to 40 ft. lbs.
A: NEW BLADE
B: WEAR LIMIT
CUTTING EDGE WORN
C: DANGEROUS CONDITION!
DO NOT USE ON MOWER!
NYLOC LOCK NUT
BLADE
BLADE HUB
(ON ENGINE)
FLANGE
BLADE
MOUNTING
SCREWS
* DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE.
ORIGINAL CUTTING
EDGE
22º TO 28º