Craftsman 247.770330 Operator's Manual page 18

7. Remove and clean the screen by scraping or washing with water. See Figure
25 below.
8. Reinstall the screen.
Before performing any type of maintenance on the machine, wait for
all parts to stop moving and disconnect and ground the spark plug wire.
Failure to follow this instruction could result in personal injury or property
damage.
Sharpening Or Replacing Chipper Blade
NOTE: Before tipping the unit, empty the fuel tank by running engine until tank is
dry, and empty the oil reservoir as described in To Drain Oil.
1. Disconnect and ground the spark plug wire.
2. Remove bag assembly or blower chute.
3. Remove the three hex cap screws holding the chipper chute to the upper
housing. See Figure 26.
4. Remove the front hubcaps, flange lock nuts, front wheels, and wave washers
that attach to the pivot arm assemblies. See Figure 27.
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 28.
SERVICE AND MAINTENANCE
WARNING
Figure 25
Front Support Brace and Lock Nut
Bell Washer
Thrust Washer
Shoulder Screw
Hub Cap
18
Figure 26
Pivot Arm Assembly
Wave
Washer
Lock Nut
Wheel
Figure 27
Figure 28