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.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 | 2._ | _" | . | |
CUTTING | EDGE |
| 2 |
|
|
|
|
|
| BLADE | TIP / |
|
|
|
|
| / |
_._..._ / |
|
| END VIEW OF | ||
|
|
|
| BLADE ASSEMBLY | |
| /,i. | 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. Ibs.
|
| CLUTCH CABLE |
VINYL | SPRING |
|
1/16" | TO 1/8" | CLUTCH CABLE |
|
|
CLEARANCE
UPPER |
|
SPRING | HOOK |
| |
LOWER |
|
CABLE
EYE
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.
NOTE: The following sections 4.2 through
4.4 are for self-propelled models only.
4.2WHEEL DRIVE CONTROL ADJUSTMENT
1.The wheel drive control is properly adjusted when there is 1/16" to 118"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.
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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