Section 4 - ADJUSTMENTS & REPAIR
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.
BLADE
REMOVE BLADE
RETAINING SCREW
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.
NOTE: DO NOT |
|
SHARPEN BEYOND |
|
ORIGINAL |
|
CUTTING EDGE. |
BLADE TIP
| END | |
ORIGINAL | VIEW OF | |
BLADE | ||
CUTTING EDGE |
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.Disconnect spark plug wire and secure end away from plug.
IMPORTANT: DO NOT tip machine with carburetor or spark plug down. Oil from crankcase will saturate the air filter and cause the engine to be hard to start or not start at all. If contamination does occur, the air filter will have to be replaced.
2.Tilt mower up on its rear wheels.
3.Remove blade. See Figure 4.2.
FIGURE 4.3
5.Check blade for balance. If necessary, correct balance by grinding heavy end of blade.
6.Reinstall blade. See Figure 3.2. Check torque of blade retaining cap screw. Recommended torque should be 30 to 40 ft. lbs.
12