Sharpening or replacing chipper blades, Sharpening or replacing shredding blade – MTD Shredder 642D thru 648D User Manual
Page 9
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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 10.
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 10.
Chute Deflector
Hand Knobs
FIGURE 10.
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 11.
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 11.
5. Remove the other blade in the same manner.
FIGURE 11.
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
11
(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 12.
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.