Craftsman 247.770990 Operator's Manual page 18

SERVICE & ADJUSTMENTS
Figure 
Figure 
Figure 
SHARPENING OR REPLACING
CHIPPER BLADE
NOTE: When tipping the unit, empty the oil and fuel tank and keep
engine spark plug side up.
1. Disconnect and ground the spark plug wire to retaining post.
2. Remove hose assembly and bag assembly.
3. Remove the three hex cap screws holding the hose hanger bracket
and chipper chute to the upper housing. See Figure 22.
4. Remove the front hubcaps, flange lock nuts, front wheels, and wave
washers that attach to the pivot arm assemblies. See Figure 23.
5. Remove the shoulder screws, thrust washers, and bell washers
that go through the pivot arms to the front support brace. The front
support brace and lock nut can be removed at this time as well.
6. Remove the four screws on the upper housing that secure the
nozzle cover. See Figure 24.
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