Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any adjustments, maintenance, service or repairs with the engine running. Stop engine. Stop blade. Engage parking brake. Remove key. Remove spark plug wire from spark plug and secure away from plug. Engine and components are HOT. Avoid serious burns, allow all parts to cool before working on machine. Fuel Filler Cap and Vent must be closed securely to prevent fuel spillage. DO NOT use a cutting blade that shows signs of excessive wear or damage. On Rear Engine Riders equipped with a grass catcher attachment, the air lifts should be replaced when the blade is replaced.
4.4 MOWER BLADE REPLACEMENT 4.4.1. BLADE WEAR LIMITS
1.Inspect blade frequently for signs of excessive wear or damage. See Figure 4.10.
NEW BLADE
WEAR LIMIT (NOTCH STARTS)
DANGEROUS CONDITION!
DO NOT USE ON MOWER!
REPLACE WITH NEW BLADE.
FIGURE 4.10
WARNING
Blades are extremely sharp and can cause severe injuries. Wear heavy gloves when working on or handling blades. DO NOT use blades that show signs of wear or damage.
4.4.2. BLADE SHARPENING
1.Follow WARNING statement found on this page.
2.Check fuel level in tank. If over 3/4 full, remove tank. Refer to Section “REMOVING FUEL TANK”. If 3/4 or less, proceed to next step.
3.Carefully stand Rear Engine Rider on rear bumper.
4.Remove blade. See Figure 4.11.
5.Inspect condition of blade. See Figure 4.10.
6.If blade is in good condition, sharpen at 22 to 28 degrees. DO NOT sharpen beyond existing cutting edge. See Figure 4.12.
7.Check blade balance after sharpening. If necessary, correct blade balance by grinding the heavy end of blade.
8.Reinstall blade. See Figure 4.11. Torque blade mounting bolts to recommended range of 30 to 40 ft. lbs.
NUTLOCKWASHER
| BLADE |
| MOUNTING |
BLADE | BOLTS |
|
FIGURE 4.11
DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE
22 TO 28º
BLADE TIP
ORIGINAL CUTTING EDGE
FIGURE 4.12
26
