Craftsman 247.77099 Operator's Manual page 16

ENGINE SPEED
The engine speed on your Yard Vacuum has been
set at the factory. Do not attempt to increase the
engine RPM. If you think that the engine is running
too fast or too slow, take your Yard Vacuum to the
nearest Sears Parts & Repair Center for repair and
adjustment.
WARNING:
the engine speed by tampering with the
engine's governor linkage. Doing so
could result in serious personal injury
and damage to the engine. The engine
RPM has been set at the factory.
REMOVING THE FLAIL SCREEN
If the discharge area becomes clogged, remove the
flail screen and clean area as follows.
• Stop the engine. Make certain the chipper
shredder vacuum has come to a complete stop.
• Before unclogging the discharge chute,
disconnect and ground the spark plug wire to
retaining post. See Figure 2 .
• Remove the vacuum bag or blower chute from
the unit as instructed in the OPERATION section
to obtain access to flail screen. See Figure 18.
Hex Screw
Flange Lock Nut
REAR VIEW
Figure 18
• Remove the two self tapping screws securing the
belt cover, and remove the belt cover. See Figure
19.
Figure 19
Do not attempt to alter
Flail Screen
Self
Tapping
Screws
Belt
Cover
• Remove self tapping screw on right side of unit
that attaches to the flail screen. See Figure 20.
Remove
For Blade
Removal
Remove
Self Tapping
Screw
• Remove hex screw on top of rear housing near
mounting bracket and the flange lock nut that
secures flail screen. See Figure 17.
• Remove and clean the screen by scraping or
washing with water. Reinstall the screen.
SHARPENING OR REPLACING CHIPPER
BLADE
NOTE:
When tipping the unit, empty the oil and fuel
tank and keep engine spark plug side up.
• Disconnect and ground the spark plug wire to
retaining post. See Figure 2 .
• Remove hose assembly and bag assembly.
• Remove the three bolts holding the hose hanger
bracket and chipper chute to the upper housing.
See Figure 20.
• Remove the front hubcaps, flange lock nuts, front
wheels, and wave washers that attach to the pivot
arm assemblies. See Figure 21.
Front Support
Brace & Lock Nut
Height Adj. Bearing
Pivot Arm Assembly
Thrust Washer
Shoulder
Screw
16
Figure 20
Spring Lever
Bell Washer
Wave Washer
Hubcap
Flange Lock Nut
Figure 21