read this manual and follow all Safety
Rules and Operating Instructions.
Sears, Roebuck and Co., Hoffman Estates, IL 60179, U.S.A.
Printed in U.S.A.
770-1228A
(3/98)
Page 2
TABLE OF CONTENTS
Content
Warranty Information
Safe Operation Practices
Assembly
Operation
Maintenance
PageContent
2
3
5
8
11
Service & Adjustment
Off-Season Storage
T rouble-Shooting
Repair Parts
Page
WARRANTY INFORMATION
One-Year Warranty on Craftsman Chipper-Shredder
For one year from the date of purchase, when this Craftsman chipper-shredder is maintained, lubricated, and
tuned up according to the operating and maintenance instructions in the owner’s manual, Sears will repair, free of
charge, any defect in material or workmanship.
This warranty excludes blades, chipper blades, flails, air cleaners, spark plugs, catcher bags and tires which are
expendable parts and become worn during normal use.
If this chipper-shredder is used for commercial or rental purposes, this warranty applies for only 30 days from the
date of purchase.
WARRANTY SERVICE IS AVAILABLE BY CONTACTING THE NEAREST SEARS SERVICE CENTER IN THE
UNITED STATES. THIS WARRANTY APPLIES ONLY WHILE THIS PRODUCT IS IN USE IN THE UNITED
STATES.
14
16
17
18
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., D/817WA, Hoffman Estates, II60179
ACCESSORIES
These accessories were
available when the chipper
shredder was purchased.
They are also available at
most Sears retail outlets, and
service centers. Most Sears
stores can order repair parts
for you when you provide the
model number of your
Craftsman chipper-shredder.
HORSEPOWER:
CRANKCASE CAPACITY;
FUEL TANK CAPACITY:
SPARK PLUG:
GAP
TIRE PRESSURE
Spark Air
Plug Filter
PRODUCT SPECIFICATION
8.5 H.P.
26oz. SAE 30 ENGINE OIL
4 Quart (UNLEADED)
Champion (N4C)
24PSI
Engine Gas
Oil Can
Model Number
Serial Number..............................................................
Date of Purchase
.030
Record both serial number and date of purchase and
keep in a safe place for future reference.
This symbol points out important safety instructions which, if not followed, could endanger the per
sonal safety and/or property of yourself and others. Read and follow all instructions in this manual before
attempting to operate your chipper shredder. Failure to comply with these instructions may result in per
sonal injury. When you see this symbol—heed its warning.
Your chipper-shredder was built to be operated according to the rules for safe operation in
DANGER' nianuai. As with any type of power equipment, carelessness or error on the part of the oper
' ator can result in serious injury. If you violate any of these rules, you may cause serious
injury to yourself or others.
WARNING: The Engine Exhaust from this product contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm.
GENERAL OPERATION
• Read this owner's guide carefully in its entirety before
attempting to assemble this machine. Read,
understand, and follow all instructions on the machine
and in the manual(s) before operation. Be completely
familiar with the controls and the proper use of the
machine before operating it. Keep this manual in a
safe place for future and regular reference and for
ordering replacement parts.
• Your chipper-shredder is a powerful tool, not a
plaything. Therefore, exercise extreme caution at all
times. Your unit has been designed to perform two
jobs; to chip and shred vegetation found in a normal
yard. Do not use it for any other purpose.
• Never allow children underage 16 to operate the unit.
Children 16 years and older should only operate the
unit under dose parental supervision. Only
responsible individuals who are familiar with these
rules of safe operation should be allowed to use your
unit.
• Keep the area of operation clear of all persons,
particularly small children and pets. Stop the engine
when they are in the vicinity of the unit. Keep work
area clean and clear of branches or obstacles which
could cause you to stumble or fall.
• When feeding material into this equipment, be
extremely careful that pieces of metal, rocks, bottles,
cans or other foreign objects are not included.
Persona! injury or damage to the machine could result.
• Always wear safety glasses or safety goggles, during
operation and while performing an adjustment or
repair, to protect eyes from foreign objects that may be
thrown from the machine.
• Wear sturdy, rough-soled work shoes and close fitting
slacks and shirt. Shirt and slacks that cover the arms
and legs and steel-toed shoes are recommended. Do
not wear loose fitting clothes or Jewelry and secure hair
so it is above shoulder length. They can be caught in
moving parts. Never operate a unit in bare feet,
sandals or sneakers. Wear gloves when feeding
material in the chipper chute or shredder hopper.
Never place your hands, feet, or any part of your body
into the shredder hopper, chipper chute, discharge
opening, or near any moving part while the engine is
running. Keep clear of the discharge opening at all
times. If it becomes necessary to push material into
the chipper chute or shredder hopper, use a small
diameter stick, NOT YOUR HANDS.
If it is necessary for any reason to unclog the feed
intake or discharge openings or to inspect or repair any
part of the machine where a moving part can come in
contact with your body or clothing, stop the machine,
allow it to cool, disconnect the spark plug wire from the
spark plug and move it away from the spark plug
before attempting to unclog, inspect or repair.
Do not operate unit while under the influence of alcohol
or drugs.
The machine should only be operated on a level
surface. Never operate your unit on a slippery, wet,
muddy or icy surface. Keep your work area clean and
clear of branches or obstacles which could cause you
to stumble and fall. Do not overreach. Maintaining
proper footing and balance is essential to preventing
accidents.
Do not allow an accumulation of processed material to
build up in the discharge area as this will prevent
proper discharge and can result in kick-back from the
chipper chute.
Keep your face and body back from chipper chute to
avoid accidental bounce back of any material.
Do not transport machine while engine is running.
If the cutting mechanism strikes a foreign object or if
your machine should start making an unusual noise or
vibration. Immediately stop the engine and allow the
machine to come to a complete stop. Disconnect the
spark plug wire and move it away from the spark plug.
Take the following steps.
a. Inspect for damage.
b. Repair or replace any damaged parts.
c. Check for any loose parts and tighten to assure
continued safe operation.
Never attempt to attach or remove catcher bag when
engine is running. Shut the engine off and wait for the
Page 4
impeller to come to a complete stop. The impeller
continues to rotate for a few seconds after the engine
is shut off. Never place any part of the body in the
impeller area until you are sure the Impeller has
stopped rotating.
• M uffler and engine become hot a nd can cause a bum.
Do not touch.
• Do not allow leaves or other debris to build-up on
engine's muffler. The debris could ignite and cause a
fire.
• Do not attempt to shred or ch ip material larger than
specified in this manual. Personal injury or damage to
the machine could result.
• Do not operate engine if air cleaner or cover over
carburetor air-intake is removed, except for
adjustment. Removal of such parts could create a fire
hazard.
• Only use accessories approved forthis machine by the
manufacturer. Read, understand, and follow all
instructions provided with the approved accessory.
• If situations occur which are not covered by this
and aii other guards and safety devices in place and
operating properly.
• Only operate unit in good daylight. Do not operate unit
at night or in dark areas where your vision may be
impaired.
CHILDREN
Tragic accidents can occur if the operator is not alert to the
presence of small children. Children are often attracted to
the chipper-shredder and the chipping and shredding
activity. Never assume that children will remain where you
last saw them.
• Keep children out of the work area and under the
watchful eye of a responsible adult other than the
operator.
• Be alert and turn the unit off if a child enters the area.
• Never al low children under the age of 16 to operate the
chipper-shredder,
least two minutes before refueling.
b. Replace gasoline cap securely and wipe off any
spilled gasoline before starting the engine as it
may cause a fire or explosion.
c. Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
d. Never refuel unit indoors because flammable
vapors will accumulate in the area.
e. Never store the machine or fuel container inside
where there is an open flame or spark such as a
gas hot water heater, space heater, clothes dryer
or furnace.
• Never run your machine in an enclosed area as the
exhaust from the engine contains carbon monoxide,
which is an odorless, tasteless and deadly poisonous
gas.
• To reduce fire hazard, keep engine and muffler free of
leaves, grass, and other debris build-up. Clean up fuel
and oil spillage. Allow unit to cool at least 5 minutes
before storing.
• Before cleaning, repairing, or inspecting, make certain
the impeller and all moving parts have stopped.
Disconnect the spark plug wire and keep wire away
from spark plug to prevent accidental starting. Do not
use flammable solutions to clean air filter.
• Check the blade and engine mounting screws at
frequent intervals for proper tightness. Also visually
inspect blades for wear and/or damage {e.g., bent,
cracked). Replace with blades which meet original
equipment specifications.
• Keep all nuts, bolts, and screws tight to be sure the
equipment is in safe working condition.
• Never tarn per with safety devices. Check their proper
operation regularly.
• After striking a foreign object, immediately stop the
engine, disconnect the spark plug wire from the spark
plug, and thoroughly inspect the unit for any damage.
Repair damage before starting and operating unit.
• Do not alter or tarn per with the engine’s governor
setting. The governor controls the maximum safe
operating speed of the engine. Over-speeding the
engine Is dangerous and will cause damage to the
engine and to other moving parts of the machine.
SERVICE
• Use extreme care in handling gasoline and other fuels.
They are extremely flammable and the vapors are
explosive.
a. Store fuel and oil in approved containers, away
from heat and open flame, and out of the reach of
children. Check and add fuel before starting the
engine. Never remove gas cap or add fuel while
the engine is running. Allow engine to cool at
This unit is equipped with an internal combustion egine and should not be used on or near any unimproved forestcovered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester
meeting applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working
order by the operator.
A
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other
states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through
your nearest Sears Authorized Service Center (See the REPAIR PARTS section of this manual.)
YOUR RESPONSIBILITY
Restrict the use of this fwwer machine to
persons who read, understand and follow the
A
warnings and instructions in this manual and on
the machine.
SAVE THESE INSTRUCTIONS FOR
FUTURE REFERENCE
Page 5
ASSEMBLY
• Remove all loose parts Including owner's
manual. See figure 1.
• Roll chipper-shredder out of the carton.
• Make certain all parts and literature have been
removed before the carton is discarded.
LOOSE PARTS
(Refer to figure 1.)
a. Hopper Assembly
b. Discharge Chute
c. Chipper Chute
d. Catcher Bag
e. Bottle of Oil
f. Safety Glasses
g. Owner's Manual (not shown In figure 1)
TOOLS REQUIRED
1. 1/2" or Adjustable Wrenches
2. 7/16" or Adjustable Wrenches
3. 9/16"or Adjustable Wrenches
4. Funnel
IMPORTANT: This unit is shipped without gasoline
or oil in the engine. After assembly, see
OPERATION section of this manual for proper fuel
and engine oil fill-up.
NOTE: To determine right and left hand sides of your
chipper-shredder, stand behind the unit with the
engine farthest away from you.
Your chipper-shredder has been completely assembled
at the factory, except for the hopper assembly, chipper
chute, discharge chute and the catcher bag.
These parts are shipped loose in the carton. A pair of
safety glasses and a bottle of oil are also included In
the carton.
UNPACKING FROM CARTON
• Cut the corners of the carton.
• Remove all packing inserts.
DISCONNECTING SPARK PLUG
• Disconnect the spark plug wire and move it
away from the spark plug before assembling the
chipper-shredder. See figure 2.
Spark Plug Wire
Figure 2
ATTACHING DISCHARGE CHUTE
• Remove the wing knobs from each side of the
discharge opening on the chipper-shredder. See
figure 3.
• Using two 7/16" wrenches, remove hex lock nut,
two spacers, and the hex bolt from top of the
housing assembly. For easy assembly, do not
remove the second spacer from the hex bolt.
• Place the discharge chute in position on the
discharge opening. Insert hex bolt and spacer
Page 6
through hinge on discharge chute and housing
(spacer fits inside of hinge). See figure 3 inset.
• Place second spacer over hex bolt inside the
other part of the hinge. Secure with hex lock
nut. Tighten securely.
• Secure both sides of discharge chute to housing
using wing knobs that you earlier removed.
Tighten wing knobs.
ATTACHING HOPPER ASSEMBLY
Figure 4
To raise the hopper, hold the hopper by the
hand-hold and lift it up till it clicks into position.
To lowerihe hopper, hold the hopper by the
hand-hold and pull the release bar. The hopper
should drop down. See figure 5.
• Remove the 8-3/8” long hex bolt and the hex nut
from the bottom of the inlet guide opening. See
figure 4 inset.
• Place the hopper assembly on the ground and
hold it in the position shown in step 1 in figure 4.
• Holding the hopper, push hopper pivot door
down inside the hopper. See figure 4.
• Slide the hopper assembly towards the chipper
shredder housing so that the upper guide on the
hopper assembly slides under the stop washer
on each side of the inlet guide. See figure 4.
■ Align the two holes (one on each side) of the
lower hopper with the two holes (one on each
side) of the inlet guide. See figure 4 inset.
• insert the hex bolt (that you earlier removed)
from the left through the hole on the hopper and
the inlet guide. Insert the hex nut onto the bolt
from the other side. See figure 4 inset.
• Tighten the bolt till the lock nut is engaged.
Make sure to remove sideplay from the bolt, but
the hopper should be able to pivot.
Figure 5
The flap control rod is already attached to the hopper
at the top. The other end of the rod has to be attached
to the stop washer on the inlet guide. See figure 6.
• Raise the hopper till it clicks into position.
• Unscrew the shoulder bolt from the stop washer
on the inlet guide. See figure 6.
• Align the loose end of the flap control rod with
the stop washer on the inlet guide.
• Slide the shoulder bolt through the opening in
the flap control rod. Secure tightly. See figure 6.
Page 7
▲
WARNING: This flap control rod is a safety
device to hold the flap in place inside the
hopper while shredding branches. Do not
operate the chipper'Shredder without
property attaching this flap control rod to the
unit.
Stop
Hex Washer*
Insert one each of the hex bolts, lock nuts, and
flat washers (that you earlier removed) through
each hole in the chute and the brace. Tighten
these bolts to secure brace to the chute.
Tighten bolts securing the brace to the lower
frame. These bolts had been removed earlier.
Tighten the three nuts on the weld studs.
Cupped
Chipper
Chute
Washer
* Do not remove these hardware from the inlet guide
assembly while attaching the flap oontrol rod.
Figure 6
ATTACHING THE CHIPPER CHUTE
• Your unit is shipped with one end of the brace
already secured to the lower frame. Loosen the
bolts securing the brace to the frame.
• Remove the three cupped washers and hex
nuts from the weld studs beside the opening on
the left side of the housing. See figure 7.
• Remove the two sets of hex bolt, lock nut, and
flat washer from the two holes on the upper end
of the brace as shown in figure 7.
• Place the chipper chute over the weld studs so
the slot on the chute is towards the bottom. Align
the three holes at the bottom of the chute with
the three weld studs.
• Secure with the three pairs of cupped washers
and hex nuts that you earlier removed. Do not
tighten the nuts at this time. Make sure to place
the cupped side of the washer against the
chipper chute.
• Align the holes towards the front opening of the
chute with the holes on the brace. See figure 7.
ATTACHING THE CATCHER BAG
Your chipper-shredder is equipped with a catcher bag
to catch the shredded material.
• To attach the bag, place the opening of the bag
over the chute deflector and the chute flange.
Make sure it completely covers the chute
deflector.
» Depress the plunger on the drawstring, and pull
on the drawstring until the bag is tight around the
chute opening. Release plunger to lock it into
position. See figure 8.
Page 8
OPERATION
Read this owner's manual and safety rules before operating your chipper-shredder. Compare the illustration
in figure 9 with your chipper-shredder to familiarize yourself with the location of various controls and
adjustments. Save this manual for future reference.
The operation of any chipper-shredder can result in foreign objects being thrown into the
eyes, which can result in severe eye damage. Always wear safety glasses provided
with the chipper-shredder before chipping or shredding, or while performing any
adjustments or repairs.
OPERATING CONTROLS
(Refer to Figure 9.)
Release Bar
Used to release the hopper when raising or lowering.
Choke Lever
Used to enrich the fuel mixture in the carburetor
when starting a cold engine.
Starter Handle
Used to manually start the engine.
Hopper Assembly
Allows leaves and small branches upto 1" diameter to
be fed into the impeller for chipping and shredding.
Lower the hopper to collect raked material for
shredding.
Throttle Control
Regulates speed of the engine.
Chipper Chute
Allows bulky vegetation like stalks or heavy branches
upto 3” diameter to be fed into the impeller for
chipping and shredding.
Catcher Bag (not shown)
Used to collect the shredded material.
Rear Wheel Lock Lever
Used to lock the rear wheels from moving.
Stopping Engine
Move throttle control lever to STOP position.
Disconnect spark plug wire and move away from
spark plug to prevent accidental starting.
MEETS ANSI SAFETY STANDARDS
Sears chipper-shredders conform to the safety standard B 71.6 -1990 of the American National Standards Institute.
8
Page 9
WARNING: Before using your chipper
A
shredder, again refer to the safety rules on
pages 3 and 4 of this manual. Always be
careful.
• Add oil if necessary. Replace dipstick and
tighten.
NOTE: Do not overfill. Oil bottle packed with unit
contains 26 oz. of oil.
GAS AND OIL FILL-UP
Oil (Packed with unit)
• Only use high quality detergent oil rated with
API service classification SF, SG or SH. Select
the oil's viscosity grade according to your
expected operating temperature. Follow the
chart below.
Colder
5W30
NOTE: Although multi-viscosity oils (5W30, 10W30,
etc.) improve starting in cold weather, these
multiviscosity oils will result in increased oil
consumption when used above 32^F. Ched< the oil
level more frequently to avoid possible engine
damage from running low on oil.
Fill engine with oil as follows.
• Remove oil fill dipstick. See figure 10.
32°F
Warmer
SAE 30
Remove cap
and fill gas
Gasoline
WARNiNG: Experience Indicates that alcohol
blended fuels (called gasohol or using ethanol or
methanol) can attract moisture wh/ch leads to
separation and formation of acids during storage.
Acidic gas can damage the fuel system of an engine
while in storage. To avoid engine problems, the fuel
system should be emptied before storage for 30
days or longer. Drain the gas tank, start the engine
and let it run until the fuel lines and carburetor are
empty. Use fresh fuel next season. See STORAGE
instructions for additional information. Never use
engine or carburetor cleaner products In the fuel tank
or permanent damage may occur.
Fill gas tank with gas as follows.
• Remove fuel cap. See figure 10.
• Make sure the container (from which you will
pour the gasoline) is clean and free from rust or
foreign particles. Never use gasoline that may
be stale from long periods of storage in the
container.
• Fill fuel tank with clean, fresh, lead-free
automotive gasoline. DO NOT use Ethyl or high
octane gasoline. See figure 10.
• Replace fuel cap.
With chipper-shredder on level ground, use a
funnel to fill engine with oil to FULL mark on
dipstick. Capacity is approximately 26 ounces.
Be careful not to overfill.
Check oil level.
WARNING: Do not fill closer than 1/2 inch
A
• Check the fuel level periodically to avoid running
• If the unit runs out of gas as it is shredding or
of top of fuel tank to prevent spills and to
a How for fuel expansion. If gasoline is
accidently spilled, move chipper-shredder
away from area of spill. Avoid creating any
source of ignition until gasoline vapors have
disappeared.
out of gasoline while operating the chipper
shredder.
chipping, it may be necessary to unclog the unit
before it can be restarted. Refer to “Removing
the Flail Screen” instructions in SERVICE AND
ADJUSTMENT section,
STARTING ENGINE
WARNING: Be sure no one other than
A
the operator is standing near the chipper
shredder while starting or operating the unit.
Do not operate this chipper-shredder
unless the chute deflector has been properly
installed and secured with hand knobs.
Page 10
NOTE: To prevent the unit from sliding, place your
foot firmly against the tire.
Attach spark
• Attach spark plug wire and rubber boot to spark
plug. See figure 11.
• Place throttle in FAST position. See figure 11.
• Move choke lever to CHOKE position (in the
direction of the arrow) as shown.
• If restarting a warm engine after a short
shutdown, move choke lever to “No Choke”
position.
• Grasp starter handle and pull rope out slowly
until engine reaches start of compression cycle
(rope will pull slightly harder at this point). Let
the rope rewind slowly. Pull rope with a rapid full
arm stroke. Let rope return to starter slowly. See
figure 11.
• When engine starts, move choke lever to half
choke position until engine runs smoothly and
then to No Choke position.
■ If engine fails to start after three pulls, move
choke lever to No Choke position and pull starter
rope again.
• If engine fires, but does not continue to run,
move choke lever to Full Choke position and pull
rope again.
■ Move choke lever to OFF position as engine
warms up.
NOTE: A noise will be heard when finding the start of
the compression cycle. This noise is caused by the
flails and fingers which are part of the shredding
mechanism falling into place, and should be
expected. In addition, the flails and fingers will be
noisy after the engine is started, until the impeller
reaches full speed.
STOPPING ENGINE
• Move starter switch to OFF position.
• Disconnect spark plug wire and move away from
spark plug to prevent accidental starting.
USING YOUR CHIPPER-SHREDDER
WARNING: Do not attempt to shred or
A
A
• If it becomes necessary to push material into the
chip any material other than vegetation
found in a normal yard (i.e., branches,
leaves, twigs, etc.).
The chipper-shredder is designed for two
different methods of operation.
a. Leaves and small branches up to 1/2"
diameter (maximum) can be fed into the
hopper assembly when it is in the raised or
lowered position. See figure 12.
b. Bulky material, such as stalks or heavy
branches, up to 3” in diameter should be
fed into the chipper chute. See figure 12.
WARNING: Do not put material larger
than is specified into the hopper, and/or into
the chipper chute. Personal injury or
damage to the machine could result.
chipper-shredder, use a smalt diameter stick NOT YOUR HANDS. The stick should be small
enough that it will be ground up if it gets into the
impeller assembly.
LOWER THE HOPPER ASSEMBLY
• To lower the hopper assembly, use one hand to
grasp the hand-hold at the top of the hopper
assembly and lift slightly. See figure 5.
• Pull up on the release bar, and lower the hopper
assembly to the ground. Release the bar. See
figure 5.
WARNING: Never remove chute deflector
A
For best performance, it is important to keep the
shredding blade and the chipper blades sharp. If the
composition of the material being discharged
till the unit has completely stopped. Never
shut off the engine until all chipping is
completed.
10
Page 11
changes (becomes stringy, etc.) or if the rate at which
the material is discharged slows down considerably, it
is likely that the shredding blade and/or chipper
blades are dull and need to be sharpened or
replaced. Refer to Service and Adjustments section.
IMPORTANT:
the housing in the discharge area. If the flail screen
becomes dogged, remove and clean as instructed in
the Service and Adjustments section.
There is a flail screen located inside
Shred material upto 1/2 inch in diameter
A
WARNING: The chipper-shredder
discharges materials with considerable
velodty. Keep away from the area around the
discharge chute. Always stop the engine and
disconnect spark plug wire w^en removing or
attaching the bag, changing containers, or
removing the shredded material. Wear safety
glasses and gloves whenever using your
chipper-shredder.
Chip material upto 3 inches
in diameter
Lower the hopper to collect
raked material for shredding
MAINTENANCE
GENERAL RECOMMENDATIONS
• Always observe safety rules when performing
any maintenance.
• The warranty on this chipper shredder does not
cover items that have been subjected to operator
abuse or negligence. To receive full value from
the warranty, operator must maintain the chipper
shredder as instructed in this manual.
• Some adjustments will need to be made
periodically to maintain your unit properly.
• All adjustments in the Service and Adjustments
section of this manual should be checked at least
once each season.
• Follow the maintenance schedule given below.
• Periodically check all fasteners and make sure
these are tight.
WARNING: Always stop the engine and
A
disconnect the spark plug wire before
performing any maintenance or adjustments.
Never remove discharge chute till the
engine has completely stopped.
CLEANING
• Clean the chipper-shredder by running water
• from a hose through the hopper assembly and
chipper chute with the engine running. Allow the
chipper-shredder to dry thoroughly.
• Wash the bag periodically with water. Allow to dry
thoroughly in the shade. Do not use heat,
ENGINE MAINTENANCE
Engine Oil
• Only use high quality detergent oil rated with API
service classification SF, SG or SH, Select the
oil's viscosity grade according to your expected
11
Page 12
CUSTOMER RESPONSIBILITIES
MAINTENANCE
SCHEDULE
o
13
Oil pivot points
o
o
DC
Clean shredder
Q.
Check engine oil
Change engine oil
u
z
o
Service air cleaner
z
UJ
Clean engine
Reset spark plug
Clean muffler
A®
/
/
<?
/
i?
<i7®
SERVICE
DATES
Operating temperature. Refer to page 9 of this
manual for viscosity chart.
• The four-cycle engine of your chipper-shredder
will normally consume some oil. Therefore,
check engine oil level regularly approximately
every five hours of operation and before each
usage.
• Stop engine and wait several minutes before
checking oil level. With engine on level ground,
the oil must be to FULL mark on dipstick.
• Change engine oil after the first five hours of
operation, and every twenty-five hours
thereafter.
To Drain Oil
Drain oil while engine is warm. Follow the
instructions given below.
• Remove oil drain plug. Catch oil in a suitable
container.
• When engine is drained of all oil, replace drain
plug securely.
• Refill with fresh oil. Refer to GAS AND OIL
FILL-UP section.
• Replace dipstick.
Air Cleaner
The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being forced into
the engine and is important to engine life and
performance. The air cleaner consists of a pre
cleaner or foam filter, and a paper filter.
Never run the engine without air cleaner completely
assembled.
To Service Air Cleaner:
1.
Service pre-cleaner after every 25 hours of use,
or at least once a season.
2.
Service filter every 100 hours of use, or at least
once a season.
Service pre-cleaner and filter more often under
dusty conditions.
Remove wing nut and cover.
Slide pre-cleaner off filter. Clean the inside of
base and cover thoroughly.
Clean pre-cleaner as follows: (See figure 13.)
a. Wash in water and detergent solution, and
squeeze(donottwist)untilalldirtisremoved.
b. Rinse thoroughly in clear water.
c. Wrap in a clean cloth and squeeze (do not
twist) until completely dry, or allow to air dry.
d. Saturate with engine oil and squeeze (don’t
twist) to distribute oil and remove excess oil.
Foam Filter
Base
Paper Filter
Figure 13
NOTE: If the pre-cleaner is torn or damaged in any
way, replace It.
12
Page 13
• If necessary, replace paper filter (do not attempt
to clean). Install new filter on base.
• Slide pre-cleaner over filter.
• Install cover and wing nut.
• Tighten wing nut securely.
Clean Engine
• Clean engine periodically. Remove dirt and
debris with a cloth or brush.
• Frequently remove grass clippings, dirt and
debris from cooling fins, air intake screen and
levers and linkage. See figure 14. This will help
ensure adequate cooling and correct engine
speed.
Figure 14
• Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 14 to avoid overspeeding,
overheating and engine damage. Clean more
often if necessary.
Figure 15
NOTE: Do not sandblast spark plug. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Muffler
WARNING: Do not operate the chipper
▲
A
shredder without a muffler, or tamper with
the exhaust system. Damaged mufflers or
spark arresters could create a fire hazard.
Inspect periodically, and replace if necessary. If
your engine is equipped with a spark arrester
screen assembly, remove every 50 hours for
cleaning and inspection. Replace if damaged.
WARNING: Always stop engine,
disconnect spark plug wire, and move It
away from spark plug before performing any
adjustments or repairs.
LUBRICATION
Lubricate the pivot points on the release bar, hopper
assembly, chute deflector and chipper chute once a
season using a light oil. See figure 16
NOTE: Cleaning with a forceful spray of water is not
recommended as water could contaminate the fuel
system.
WARNING: Temperature of muffler and
A
Spark Plug
• Clean the spark plug and reset the gap to .030"
nearby areas may exceed 150° F(65°C).
Avoid these areas.
at least once a season or every 50 hours of
operation. See figure 15. Spark plug
replacement is recommended at the start of
each season. Refer to engine parts list for
correct spark plug type.
Figure 16: Lubrication Chart
13
Page 14
14
Page 15
SERVICE & ADJUSTMENTS
REMOVING THE FLAIL SCREEN
If the discharge area becomes clogged, remove the
flail screen and clean area as follows.
• Stop eng I ne, ma ke ce rtai n the chipper
shredder has come to a complete stop and
disconnect spark plug wire from the spark plug
before unclogging the chute.
• Remove the two hand knobs on each side of
the discharge chute (also called the chute
deflector).
• 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 17.
• Pull the flail screen from inside the housing.
See figure 17.
• 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 wifli
the curved side down.
• 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 17.
• Using a 7/16” wrench, remove the brace
(holding the chute to the frame) by removing the
hex bolts.
NOTE: When re-assembling, 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 18.
Slot
Blade
Chute Deflector
SHARPENING OR REPLACING
THE BLADES
Chipper Blades
• Disconnect spark plug wire and move it away
from spark plug.
fiarp Edge
Figure 18
• 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 18 (sharp
edge is assembled toward the slotted opening at
the bottom).
• Torque bolts and nuts to 250-350 inch-pounds.
Shredding Blade
The shredding blade may be removed for sharpening
or replacement as follows.
15
Page 16
Disconnect spark plug wire and move it away
from spark plug.
Lower the hopper assembly. Block up the
housing. See figure 19.
Weld Bolt
cause damage to the unit. The blade can be tested
for balance by balancing it on a round shaft
screwdriver or nail. Remove metal from the heavy
side until it is balanced evenly. See figure 20.
When reassembling the blade, tighten center
bolt to between 550 and 650 inch-pounds and
the two outer bolts to between 250and 350 inchpounds, or lacking torque wrench, tighten
securely.
Figure 19
• Remove the six hex lock nuts and lock washers
from the housing weld bolts using a 1/2" wrench.
Separate the chipper-shredder into two halves.
• Remove the back-up plate.
NOTE: When reassembling, make certain the
embossed tab faces inward towards the impeller, and
opening on the back-up plate is toward the bottom of
the unit.
• Remove the two hand knobs and cupped
washers which secure the chute deflector. Raise
the chute deflector.
• Insert a 1/2" or 3/4" diameter pipe through the
flail screen into the impeller to keep it from
turning, or remove the flail screen and insert a
piece of wood {2 x 4) into the chute opening.
• Remove the two outside screws on the blade,
using a 3/16" alien wrench and a 1/2" wrench,
• Remove the blade by removing the center bolt,
lock washer and flat washer.
WARNING: Use caution when removing
àk
the blade to avoid contacting the weld bolts
on the housing.
When sharpening the blade, follow the original
angle of grind as a guide. It is extremely
important that each cutting edge receives an
equal amount of grinding to prevent an
unbalanced blade.
An unbalanced blade will cause excessive
vibration when rotating at high speeds and may
ADJUSTING CARBURETOR
WARNING: If any adjustments are made to
A
The carburetor has been pre-set at the factory and
should not require adjustment. However, if your
engine does not operate properly due to suspected
carburetor problems, take your chipper-shredder to
your nearest SEARS service center.
the engine while the engine is running (e.g.
carburetor), keep clear of all moving parts.
Be careful of heated surfaces and muffler.
ENGINE SPEED
The engine speed on your chipper-shredder has been
set at the factory. Do not attempt to increase engine
speed or it may result in personal injury. If you believe
the engine is running too fast or too slow, take your
chipper-shredder to the nearest SEARS service
center for repair and adjustment,
TIRES
Recommended operating tire pressure is 24 p.s.i.
(sidewall of tire may give tire manufacturers
recommended pressure). Equal tire pressure should
be maintained on both tires.
WARNING: Excessive pressure when seating
A
beads may cause lire/rim assembly to burst with
force sufficient to cause serious injury.
16
Page 17
OFF-SEASON STORAGE
Prepare your chipper-shredder for storage at the end
of the season or if the u nit wi 11 not be used for 30 d ays
or more.
WARNING: Never store machine with fuel
A
A yearly check-up by your local Sears service center
is a good way to make certain your chipper-shredder
will provide maximum performance for the next
season.
in the fuel tank inside of buiiding where
fumes may reach an open flame or spark,
or where ignition sources are present such
as hot water and space heaters, furnaces,
clothes dryers, stoves, electric motors, etc.
CHIPPER-SHREDDER
• Clean the chipper-shredder thoroughly.
• Wipe unit with an oiled rag to prevent rust (use a
light oil or silicone),
ENGINE
IMPORTANT: It is important to prevent gum deposits
from forming in essential fuel system parts such as
carburetor, fuel filter, fuel hose, or tank during
storage. Also, experience indicates that alcohol
blended fuels (called gasohol or using ethanol or
methanol) can attract moisture which leads to
separation and formation of acids during storage.
Acidic gas can damage the fuel system of an engine
while in storage.
• Drain the fuel tank.
• Start the engine and let it run until the fuel lines
and carburetor are empty.
• Drain carburetor by pressing upward on bowl
drain which is located below the carburetor.
• Never use engine or carburetor cleaner
products in the fuel tank or permanent damage
may occur.
• Use fresh fuel next season,
NOTE: Fuel stabilizer is an acceptable alternative in
minimizing the formation of fuel gum deposits during
storage.
• Add stabilizer to gasoline in fuel tank or storage
container.
• Always follow the mix ratio found on stabilizer
container.
• Run engine at least 10 minutes after adding
stabilizer to allow the stabilizer to reach the
carburetor.
• Do not drain the gas tank and carburetor if using
fuel stabilizer. Drain all the oil from the
crankcase (this should be done after the engine
has been operated and is still warm) and refill
the crankcase with fresh oil.
• If you have drained the fuel tank, protect the
inside of the engine as follows.
• Remove spark plug, pour approximately 1/2
ounce (approximately one tablespoon) of engine
oil into cylinder and crank slowly to distribute oil.
• Replace spark plug.
OTHER
• Do not store gasoline from one season to
another.
• Replace your gasol ine can if your can starts to
rust. Rust and/or dirt in your gasoline will cause
problems. Store unit in a clean, dry area. Do not
store next to corrosive materials, such as
fertilizer.
NOTE: If storing in an unventilated or metal storage
shed, be certain to rustproof the equipment by coating
with a light oil or silicone.
17
Page 18
TROUBLE-SHOOTING
PROBLEM
Engine fails to start
Loss of power; operation erratic
Engine overheats
Too much vibration
POSSIBLE CAUSE
1. Fuel tank empty, or stale fuel
2. Spark plug wire disconnected
3. Faulty spark plug
4. Throttle control not in correct
position
1. Spark plug wire loose
2. Unit running on Choke
3. Blocked fuel line or stale fuel
4. Water or dirt in fuel system
5. Carburetor out of adjustment
6. Dirty air cleaner
1. Carburetor not adjusted properly
2. Engine oil level low
1. Loose parts or damaged
impeller
CORRECTIVE ACTION
1. Fill tank with clean, fresh fuel
2. Connect wire to spark plug.
3. Clean, adjust gap or replace.
4. Move throttle control to FAST
position
1. Connect and tighten spark plug
wire
2. Move choke lever to OFF
position
3. Clean fuel line; fill tank with
clean, fresh gasoline.
4. Disconnect fuel line at
carburetor to drain fuel tank.
Refill with fresh fuel.
5. Contact your SEARS service
center.
6. Service air cleaner.
1. Contact your SEARS service
center
2. Fill crankcase with proper oil
1. Stop engine immediately and
disconnect spark plug wire.
Tighten all bolts and nuts. Make
all necessary repairs. If vibration
continues, have unit serviced by
a SEARS service center.
Unit does not discharge
Rate of discharge slows
considerably or composition of
discharged material changes
1. Discharge chute clogged
2. Foreign object lodged in
impeller
1, Shredding blade and/or chipping
blade dull
For repairs beyond the minor adjustments
listed above, please contact your nearest
SEARS service center.
18
1. Stop engine immediately and
disconnect spark plug wire,
clean flail screen and inside of
blower housing.
2. Stop engine immediately and
disconnect spark plug wire.
Remove lodged object.
1. Sharpen or replace blade(s)
Page 19
PARTS LIST
SEARS CRAFTSMAN 8.5 H.P. CHIPPER-SHREDDER MODEL 247.775880
80 79
19
Page 20
Key
No
—
1
2681-0118
Part NoDescription
770-1228AOwner’s Manual
11480Stop Washer
inlet Guide Assembly
3681-0144Arm Bracket Assembly
4
710-0542Hex Flange Bolt: 5/16-18 x
8.375" (Gr.5)
710-0607
5
Hex Washer Head Self-Tapping Screw: 5/16-18 x 0.5"
Hex Bolt 1/4-20 x .625
Flat Washer .28 l.d. x .74 O.d,
Flanged Lock Nut
Chipper Chute Support
Hex Scr. 1/4-20 x .625 (Gr. 2)
Hex Nut 5/16-18Thd. (Gr.5)
Bell Washer .345” l.d. x .88"
Chipper Chute Assembly
Key
No
49726-0214
50
51
52712-3027
Part NoDescription
Push Cap 5/8” dia.
734-0255Air Valve
750-0793Chute Hinge Spacer
Hex Ctr. Lock Nut 1/4-20 Thd.
53714-0149BInternal Cotter Pin
55
720-0170Hand Knob
56710-0805
57
781-051 OBShredder Frame
58
736-0366Flat Washer 1.12 x .64 x .120
59734-1845
61
736-0170Special Lock Washer
63
681-0117-0689Flail Housing Ass'y. — Inner
65710-0157
67
—
68781-0490
69
712-0411Hex Top Lock Nut 5/16-24
Hex Bolt 5/16-18x1.5"
Wheel Assembly
Hex Bolt 5/16-24 x .75” Lg.
Engine, Tecumseh 143.988503
Solid State Mounting Stud
Screw, Torx T-15, 10-24 x
15/16”
Ground Wire
Cylinder Head Gasket
Exhaust Valve (std.)
Exhaust Valve (1/32" os)
Intake Valve (1/32” os)
Belleville Washer
Screw, 5/16-18 X 2"
Screw, 5/16-18 x 5/8’
Screw, 1/4-20 x 9/16’
Resistor Spark Plug
Screw, 10-24 X 1/2’
Valve Spring Cap
Valve Spring Keeper
Breather Gasket
Breather Element
Valve Cover
Breather Tube
Breather Tube Grommet
Screw, 10-24 x 1/2”'
Nut & Lock Washer
Screw, 1/4-28 X 1"
Gasket
22
Page 23
SEARS CRAFTSMAN 8.5 H.P. ENGINE MODEL 143. 988503 FOR
CHIPPER-SHREDDER MODEL 247.775880
Key
No.
18534707
18634667
200
20331342
204
206
207
209650821
21535882
223
224
23828820
23927272A
24037104
24233267
24533268
245A35881
25033269A
251
260
261
262
264A650802
26533272B
27534185B
27631588
277650729
277A651036
Part No.
34677
651029
610973
33878
650378
27915A
650513
36250
650788
29747B
Description
Intake Pipe
Governor Link
Control Bracket (Incl. 19,203
&204)
Compression Spring
Screw. TorxT-10, 5-40 x 7/16”
Terminal
Throttle Link
Screw, 10-32 X 1/2”
Control Knob
Screw, Torx T-30, 5/16-18 x 1-
1/8
Intake Pipe Gasket
Screw, 10-32 X 1/2”
Air Cleaner Gasket
Air Cleaner Bracket
Air Cleaner Bracket
Air Cleaner Filter
Air Cleaner Filter
Air Cleaner Cover
Wing Nut, 1/4-20
Blower Housing
Screw, 5/16-18 X 3/4’
Screw, Torx T-40, 5/16-24 x
21/32”
Screw, 1/4-20 x 5/8"
Cylinder Head cover
Muffler
Locking Plate
Screw. 5/16-18x3-3/16"
Screw, 5/16-18x3-31/32"
Key
No.
278
280
281
282
28535985BStarter Cup
28729752Nut & Lock Washer
29030962Fuel Line
29226460Fuel Line Clamp
298650665Screw, 1/4-15 X 3/4’
30034186AFuel Tank
30136246
30535554
30735499O Ring
308
310
32529443
32735392
339
34034259
341
342
370G35274
370J
380
390590746
400
41634479A
900
900
Part No.
36908
36799AHeat Shield
33013Starter Bubble Cover
650760Screw, 8-32 x 3/8’
35540Fill Tube Clip
36205Dipstick
35880Spacer
34258A
30063
35703Throttle Decal
640112Carburetor (Incl. 184)
36450BGasket Set
—
Heat Shield Spacer
Fuel Cap
Oil Fill Tube
Wire Clip
Starter Plug
Fuel Tank Bracket
Fuel Tank Bracket
Screw, Torx T-30.1/4-20 x 1/2"
Oil Instruction Decal
Rewind Starter
Spark arrester Kit
Replacement Engine none
Replacement SB 756321,
Order 71-999
Description
23
Page 24
SEARS CRAFTSMAN 8.5 H.P. ENGINE MODEL 143.988503 FOR
CHIPPER-SHREDDER MODEL 247.775880