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.Inspect blade frequently for signs of excessive wear or damage. See Figure 4.1.
NEW BLADE
WEAR LIMIT (NOTCH STARTS)
DANGEROUS
CONDITION !
DO NOT USE ON
MOWER !
REPLACE WITH NEW
BLADE.
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.
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.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.
MAKE SURE THAT
BLADE HUB IS
SEATED
BLADE BETWEEN
HUBFLANGES
FLANGE
BLADE
CONE WASHER (Concave Side 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
CUTTING EDGE
BLADE TIP
END VIEW OF
BLADE ASSEMBLY
ORIGINAL CUTTING EDGE
FIGURE 4.3
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 30 to 40 ft. lbs.
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