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.
4.1.2. BLADE SHARPENING
4.Sharpen blade on a grinding wheel at an angle of
22to 28 degrees. DO NOT sharpen blade beyond original cutting edge. See Figure 4.4.
DO NOT SHARPEN
BEYOND ORIGINAL CUTTING EDGE
BLADE TIP
END VIEW OF
BLADE ASSEMBLY
ORIGINAL CUTTING EDGE
FIGURE 4.4
5.Check blade for balance. If necessary, correct balance by grinding heavy end of blade.
6.Reinstall blade. See Figure 4.3. Check torque of blade retaining cap screw. Recommended torque should be 40 ft. lbs.
4.2WHEEL DRIVE CONTROL ADJUSTMENT
1.The wheel drive control is properly adjusted when there is 1/16” to 1/8” clearance between the inside of the spring hook and the inside of the clutch cable eye with the wheel drive control released. See Figure 4.5.
CLUTCH CABLE |
|
VINYL SPRING COVER |
|
1/16” TO 1/8” | CLUTCH CABLE |
CLEARANCE | EYE |
UPPER |
|
SPRING | SPRING HOOK |
| |
LOWER |
|
SPRING |
|
CABLE
CLUTCH CABLE EYE
SPRING
FIGURE 4.5
2.To adjust, unhook upper spring from cable eye and rotate spring in direction required to extend or shorten spring length.
3.Rehook upper spring to cable eye and check clearance. Repeat procedure if required.
NOTE: The vinyl spring cover should be kept over the spring at all times except for adjustments.
4.If the wheel drive control fails to return quickly to the “OFF” position when released, check for binding at the cable holdings located on the side of the right handle. The upper clip should be located 2” below the upper knob; the lower clip should be 4” above the lower knob. The cable should slide freely with the clips installed at these locations.
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