Craftsman 247.770131 Operator's Manual page 21

7. Carefullytilt and supportthe unit up to provideaccessunderneath
to the nozzlemountinghardwareand impeller.Removethe three
shoulderbolts securingthe black plasticlowerflail housingto the
lowerhousing.Referto Figure27.
8. Tilt top of black plasticlowerflail housingtowardthe engineto
remove.
9. Usinga 3/16"allen wrench,removetheflat headcap screwsthat
hold the chipperblade to the impeller.Thesescrewsare acces-
siblethroughtheopeningcreatedwhenthechipperchutewas
removedearlier.See Figure28.
10. Thenuts on the flat headcap screwscan be reachedfrom
underneathusinga 1/2-inchsocket,universal,and extension.
See Figure29.
11. Replaceor sharpenchipperblade.The bladecan be sharpened
with a fileor on a grindingwheel.
The chipperbladeis sharp.Whensharpeningblade,wear leather
work glovesto protectyourhandsand followthe originalangleof
grind.
12. Reassemble by performingthe previousstepsin theopposite
orderand mannerof removal.
NOTE:Tightenbladescrewsto 210- 250 in-lbs. Makecertainchipper
bladeis reassembled with the sharpedge facingupward.
Black
Nozzle
\
f
Shoulder Screws
Figure27
C
Flat Head Ca Screws
Chipper Blade
Figure28
J
Impeller
21
Figure29
J