Craftsman 247.770990 Operator's Manual page 19

7. Carefullytilt and supportthe unitup to provideaccessunderneath
to the nozzlemountinghardwareand impeller.Removethe three
shoulderbolts securingthe black plasticlowerflail housingto the
lowerhousing.Referto Figure25.
8. Tilt top of black plasticlowerflailhousingtowardthe engineto
remove.
9. Usinga 3/16"allen wrench,removethe flat head capscrewsthat
hold thechipperblade to the impeller. T hese screwsare accessible
throughthe openingcreatedwhenthe chipperchutewas removed
earlier.See Figure26.
lO.The nutson theflat headcap screwscan be reachedfrom
underneathusinga 1/2-inchsocket,universal,and extension.See
Figure27.
11.Replaceor sharpenchipperblade.The bladecan be sharpened
with a file or on a grindingwheel.
12.Whensharpeningblade,protecthandsby usingglovesand follow
the originalangleof grind.
13.Reassemble by performingthe previousstepsin theoppositeorder
and mannerof removal.
NOTE:Tighten bladescrewsto 210- 250 in-lbs.Makecertain chipper
bladeis reassembled with the sharpedge facingupward.
f --,,
Black Plastic
lower flail
housing
.............. ,
Shoulder Screws
Figure 25
J
f
Flat Head Screws
Chipper Blade
f
_NNuts
Figure 26
Impeller
\
19
Figure 27
J