Craftsman 247.775870 - Manual (Page 14)

SERVICE & ADJUSTMENTS
CLEANING THE FLAIL SCREEN
If the discharge area becomes dogged, remove the
flail screen and clean area as follows.
•
Stop engine, make certain the chipper-shredder
has come to a complete stop and disconnect
spark plug wire from the spark plug.
• Remove the two hand knobs on each side of the
discharge chute. Lift the discharge chute up,
and keep it out of the way.
• Remove two hairpin clips from the clevis pins
which extend through the housing. Remove the
clevis pins. See figure 18.
Discharge Chute
Figure 18
• Pull the flail screen from inside the housing. See
figure 18. Clean the screen by scraping or washing
with water.
• Reinstall the screen. Put the discharge chute
back to its original position and tighten the hand
knobs.
NOTE; Be certain to reassemble the flail screen with
the curved side down.
SHARPENING OR REPLACING THE
BLADES
Chipper Blades
• Disconnect spark plug wire and move it away
from spark plug.
• Remove the flail screen as instructed in previous
section.
• Using a 1/2” wrench, remove the chipper chute
by removing three hex nuts and washers. See
figure 18. (Only two hex nut positions shown in
figure.)
NOTE: When reassembling, the cupped washer goes
on the slot toward the bottom of the chipper chute with
the cupped side against the chute.
• Rotate the impeller assembly by hand until you
locate one of the two chipper blades in the
chipper chute opening. Remove the blade, using
a 3/16" alien wrench on the outside of the blade
and 1 /2“ wrench on the impeller assembly
(inside the housing). See figure 19.
Blade
Discharge Chute
Sharp Edge
Figure 19
Remove the other blade in the same manner.
Replace or sharpen blades.
If sharpening, make certain to remove an equal
amount from each blade.
Reassemble in reverse order. Make certain
blades are reassembled with the sharp edge
facing the direction shown in figure 19 (sharp
edge is assembled toward the slotted opening at
the bottom).
Torque bolts and nuts to 250-350 inch-pounds.
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