Sears 645B User Manual
Page 9
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mended
at
the
start
of
each
season;
check
engine
manual for correct plug type and gap specifications.
Clean
the
engine
reguiariy
with
a
cloth
or
brush.
Keep
the
cooling
system
(blower
housing
area)
clean
to
permit
proper
air
circulation
which
is
essential
to
engine performance and life. Be certain to remove ali
dirt and combustible debris from muffler area.
CLEANING
The shredder may be cleaned by running water from
a
hose
through
the
hopper
assembiy
and
chipper
chute with the engine running. Allow the shredder to
dry thoroughly.
Wash
the
bag
periodically
with
water.
Allow
to
dry
thoroughly in the shade. Do not use heat.
REMOVING THE FLAIL SCREEN
If
the
discharge
area
becomes
clogged,
remove
the
flail screen and clean area as follows.
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
ciips
from
the
clevis
pins
which
extend
through
the
housing.
Remove
the
clevis
pins.
Lift
the
flail
screen
from
inside
the
housing. See figure 14.
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 14.
Chute Deflector
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 14.
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 15.
5. Remove the other blade in the same manner.
FIGURE 14.
Hand Knobs
FIGURE 15.
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
15
(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 leaf ramp. Block up the housing. See
figure 16.
3.
Remove the six hex lock nuts and lock washers
from the housing weld bolts using a 1/2" wrench.
Separate the shredder into two halves.
4. Remove the back-up plate.