MTD 244-648D401 - Manual (Page 7)

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1. Stop the engine, make certain the shredder has
come to a complete stop and disconnect spark
plug wire from the spark plug before unclogging
the chute.
2. Loosen the two hand knobs on each side of the
chute deflector. Lift the chute deflector up, and tie
it out of the way.
3. Remove two hairpin clips from the clevis pins
which extend through the housing. Remove the
clevis pins. Lift the flail screen from inside the
housing. See figure 9.
4. Clean the screen by scraping or washing with
water. Reinstall the screen.
NOTE: Be certain to reassemble the flail screen with
the curved side down as shown in figure 9.
Chute Deflector
Hand Knobs
FIGURE 9.
SHARPENING OR REPLACING CHIPPER BLADES
1. Disconnect spark plug wire and move it away
from spark plug.
2. Remove the flail screen as instructed in previous
section.
3. Remove the chipper chute by removing three hex
nuts and washers. A 1/2" wrench is required. See
figure 9.
NOTE: When reassembling, the cupped washer goes
on the bottom of the chipper chute with the cupped
side against the chute.
4. Rotate the impeller assembly by hand until you
locate one of the 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 10.
5. Remove the other blade in the same manner.
FIGURE 10.
Replace or sharpen blades, if sharpening, make cer­
tain 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 10 (sharp
edge is assembled toward the slotted opening in the
impeller assembly).
SHARPENING OR REPLACING SHREDDING BLADE
The shredding blade may be removed for sharpening
or replacement as follows.
1. Disconnect spark plug wire and move it away
from spark plug.
2. Lower the hopper assembly. Block up the hopper.
See figure 11.
3. Remove the six hex lock nuts and flat washers
from the housing weld bolts using a 1/2" wrench.
Remove the hopper assembly.
4. Remove the back-up plate.
NOTE: When reassembling the back-up plate, make
certain the single tab is at the top of the back-up
plate, and the two tabs are at the bottom. Also, make
certain the tabs go toward the blade.