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.
NYLOC LOCK NUT
BLADE
BLADE HUB (ON ENGINE)
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.
A:NEW BLADE
B: WEAR LIMIT
CUTTING EDGE WORN
C:DANGEROUS CONDITION! DO NOT USE ON MOWER!
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.
FLANGE
BLADE
MOUNTING
SCREWS
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.
*DO NOT SHARPEN BEYOND ORIGINAL CUTTING EDGE.
ORIGINAL CUTTING
EDGE
22º TO 28º
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.
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