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.
770-1231A
Page 2
TABLE OF CONTENTS
Content
Warranty Information
Safe Operation Practices
Assembly
Operation
Maintenance
Page
2
3
5
8Repair Parts
11
Content
Service & Adjustment
Off-Season Storage
Trouble-Shooting
Page
14
16
17
18
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 operator’s manual, Sears will repair, free
of charge, any defect in material or woriimanship.
This warranty excludes the 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.
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
chipper-shredder.
Model Number
Serial Number
Date of Purchase
Record both serial number and date of purchase and
keep in a safe place for future reference.
............
..................................
247.775870.
............................
Tow Hitch Kit
Page 3
A
SAFE OPERATION PRACTICES
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
A
sonal injury. When you see this symbol—heed its warning.
Your chipper-shredder was built to be operated according to the ruies for safe operation in
n AMr'PR' manuai. As with any type of power equipment, carelessness or error on the part of the operDANGc . 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
A
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 under age 16 to operate the unit.
Children 16 years and older should only operate the
unit under close 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.
Personal 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 stu rdy, rough-so led wo rk shoes and close f itti ng
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
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.
Muffler and engine become hot and can cause a burn.
Do not touch.
Page 4
• 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 chip 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 afire
hazard.
• Only use accessories approved for this machine by
the manufacturer. Read, understand, and follow all
instructions provided with the approved accessory.
• If situations occur which are not covered by this
manual, use care and good judgment. Contact your
dealer for assistance.
• Keep discharge discharge chute, chipper chute door,
and all 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 allow children under the age of 16 to operate
the chipper-shredder.
SERVICE
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 mufflerfreeof
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.
• Nevertamper 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 tamper 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.
• 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 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.
This unit is equipped with an internal combustion engine 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
Àk
order by the operator.
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 power 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 CHIPPER-SHREDDER
FROM CARTON
• Cut the corners of the carton.
• Remove all packing inserts,
• Remove all loose parts including owner’s
• Roll chipper-shredder out of the carton,
• Make certain all parts and literature have been
LOOSE PARTS
{Refer to figure 1.)
manual. See figure 1.
removed before the carton is discarded.
a. Hopper Assembly
b. Discharge Chute
c. Catcher Bag
d. Bottle of Oil
e. Safety Glasses (not shown in figure 1)
f. Owner's Manual (not shown in figure 1)
g. Chipper Chute
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,
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.
TOOLS REQUIRED
1. 1 /2" or Adjustable Wrenches
2. 7/16" or Adjustable Wrenches
3. 9/16" or Adjustable Wrenches
4. Funnel
DISCONNECTING SPARK PLUG
• Disconnect the spark plug wire and move it
away from the spark plug before assembling the
chipper-shredder. See figure 2.
Figure 2
Page 6
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 assembiy. 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
through hinge on discharge chute and housing
(spacer fits inside of hinge). See figure 3 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.
Hopper Pivot Door
Stop
other half 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
• 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.
Inlet Guide
Hopper
Figure 4
Tighten the bolt to remove all sideplay ( after
tightening the bolt, the hopper will pivot up and
down). This will secure the hopper assembly to
the inlet guide.
To ra/sethe hopper, hold the hopper by the
hand-hold and lih it up till it clicks into
position.See figure 5.
• To /owerthe hopper, hold the hopper by the
hand-hold and pull the release bar. The hopper
should drop down. See 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
Page 7
to the stop washer on the inlet guide. See figure 6.
WARNING: This flap control rod is a safety
A
device to hold the flap in place inside the
hopper while shredding branches. Do not
operate the chipper-shredder without
properly attaching this flap control rod.
Stop
Hex Washer*
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.
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 control rod.
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.
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
ATTACHING THE CATCHER BAG
Your chipper-shredder is equipped with a catcher bag
to catch the shredded material.
• To attach the bag, place the bag opening over
the discharge chute so it completely covers the
discharge chute and goes over the chute
flanges.
• Depress the plunger on the draw-string, and pull
on the draw-string until the bag is tight around
the chute opening. Release plunger to lock it into
position. See figure 8.
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 famiiiarize yourself with the location of various controls and adjustments.
Save this manuai 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 or eye shieids before chipping or shredding, or while performing any
adjustments or repairs.
Hopper
Assembly
Primer
Button
Figure 9
OPERATING CONTROLS
Release Bar
Used to release the hopper when raising or lowering.
Starter Handle
Used to manually start the engine.
Throttle Control
Regulates speed of the engine.
Catcher Bag
Used to collect the shredded material, (not shown)
Hopper Assembly
Allows leaves and small branches upto 0.5 “ diameter
to be fed into the impeller for chipping and shredding.
Chipper
Chute
Throttle
Control
Lower the hopper to collect raked material for
shredding.
Chipper Chute
Allows bulky vegetation like stalks or heavy branches
upto 3” diameter to be fed into the impeller for
chipping and shredding.
Primer Button
Fills carburetor with gasoline to aid in starting a cold
engine.
Starter
Handle
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,
Page 9
WARNING: Before using your chipper
shredder, refer to the safety rules on
A
pages 3 and 4 of this manual again.
Always be careful.
GAS AND OIL FILL-UP
Tilt chipper-shredder toward the left (from behind
the hopper). See figure 11. Check oil level. Put the
unit back on tiie ground carefully.
WARNING: Do not tilt unit holding the
hand-hoid.
A
Oil (Packed with unit)
• Only use high quality detergent oil rated with
API service classification SF, SG orSH. Select
the oil’s viscosity grade according to your
expected operating temperature. Follow the
chart below.
Colder
5W30SAE 30
NOTE: Although multi-viscosity oils (5W30, 10W30,
etc.) improve starting in cold weather, these
muliiviscosity oils will result in increased oil
consumption when used above 32°F. Check the oil
level more frequently to avoid possible engine
damage from running low on oil.
Fill engine with oil as follows.
• Remove dipstick. See figure 10.
1. Remove dipstick
32°F
Warmer
Add oii if necessary. Replace dipstick and
tighten.
Figure 11
NOTE: Do not overfill. Oil bottle packed with unit
contains 20 oz. of oil.
Gasoline
With chipper-shredder on levei ground, use a
funnel to fill engine with oil to FULL mark on
dipstick. Capacity is approximateiy 20 ounces.
Be careful not to overfill.
Warning: 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.
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 fresh, lead-free gasoline. DO
NOT use Ethyl or high octane gasoline.Replace
fuel cap.
Page 10
WARNING: Do not fill closer than 1 /2 inch
A
• Check the fuel level periodically to avoid
• If the unit runs out of gas as it is shredding or
of top of fuel tank to prevent spills and to
allow 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.
running 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 in SERVICE AND
ADJUSTMENT section.
STARTING ENGINE
WARNING: Be sure no one other than
A
NOTE: To prevent the unit from sliding, place your
foot firmly against the tire.
• Attach spark plug wire and rubber boot to spark
1. Attach spark plug wire
the operator is standing near the chipper
shredder while starting or operating. Do not
operate this chipper-shredder unless the
discharge chute has been properly installed
and is secured with the hand knobs.
plug. See figure 12.
• Pull rope with a rapid full arm stroke. Let rope
return to starter slowly. See figure 12.
• When engine starts, move throttle control to
IDLE position for a few minutes warm-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 throttle control lever to STOP position
(DOWN).
• 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
The chipper-shredder is designed for two different
methods of operation.
chip any material other than vegetation
found in a normal yard {i.e., branches,
leaves, twigs, etc.).
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 13.
b. Bulky material, such as stalks or heavy
branches, up to 3" in diameter can be fed
into the chipper chute. See figure 13.
Figure 12
Place the throttle control lever in FAST position
(UP).
Push primer 2 or 3 times, waiting a couple of
seconds between each push. In cold weather
(50°F or below) prime 5 times.
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.
10
WARNING: Do not put material larger
than is specified into the hopper or the
A
If it becomes necessary to push material into the
chipper-shredder, use a small diameter stick— not
your hands. The stick should be small enough that it
will be ground up if it gets into the impeller assembly.
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
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
chipper chute. Personal injury and/or
damage to the machine could result.
WARNING: Never remove discharge
chute till the unit has completely stopped.
Never turn off the engine untii all
chipping is completed.
Page 11
blades are dull and need to be sharpened or
replaced. To sharpen or replace the blades, refer to
Service and Adjustments section,
IMPORTANT: There is a flail screen located inside
the housing in the discharge area. If the flail screen
becomes clogged, remove and clean as instructed in
the Service and Adjustments section on page 14,
WARNING: The chipper-shredder discharges materials with considerable velocity. Keep away from
A
the area around the discharge chute. Always stop the engine and disconnect spark plug wire when
removing or attaching the bag, changing containers, or removing the shredded material. Wear safety
glasses and gloves whenever using your chipper-shredder.
Shred material upto 1/2 inch in diameter
TO 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. Refer to figure 5.
• Pull up on the release bar, and lower the hopper
assembly to the ground. Release the bar. Refer
to figure 5.
V^Chip materiai upto
^3 inches*
in diameter
Lower the hopper to collect
raked material for shredding
Figure 13
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 be needed periodically for
proper maintenance of your chipper shredder.
These adjustments are covered in the following
section of this manual,
• All adjustments mentioned here should be
checked at least once each season.
• Follow the maintenance schedule given below.
mv-
• Periodically check all fasteners and make sure
these are tight,
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.
WARNING: Always stop the engine and
disconnect the spark plug wire before
A
performing any maintenance or adjustments.
Never remove discharge chute till the engine
has completely stopped.
11
Page 12
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 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.
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.
Wing Nut
Cover
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.
CUSTOMER RESPONSIBILITIES
/ / / /
MAINTENANCE
SCHEDULE
1—
o
Oil pivot points
Q
O
CC
Clean shredder
Q.
Pre-Cleaner
Wing Nut
Figure 14
/
<?
iS-
/
SERVICE
DATES
Check engine oil
Change engine oil
LU
Z
Service air cleaner
CD
Z
UJ
Clean engine
Reset spark plug
Clean muffler
</
12
Page 13
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.
3. Service pre-cleaner and filter more often under
dusty conditions.
• Remove wing nut and cover. For location, see
figure 14 inset.
• Slide pre-cleaner off filter. Clean the inside of
base and cover thoroughly. See figure 14.
• Clean pre-cleaner as follows:
c. Wash in water and detergent solution, and
squeeze (do nottwist) until all dirt is removed.
d. Rinse thoroughly in clear water.
e. Wrap in a clean cloth and squeeze (do not
twist) until completely dry, or allow to air dry.
f. Saturate with engine oil and squeeze (don’t
twist) to distribute oil and remove excess oil.
NOTE: If the pre-cleaner is torn or damaged in any
way, replace it.
• If necessary, replace paper fitter —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. This will help ensure
adequate cooling and correct engine speed.
See figure 15.
WARNING: Temperature of muffler and
A
Spark Plug
• Clean the spark plug and reset the gap to .030"
NOTE: Do not sandblast spark plug. Sparkplug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
Muffler
• Inspect periodically, and replace if necessary. If
nearby areas may exceed 150® F(65°C).
Avoid these areas.
at least once a season or every 50 hours of
operation. See figure 16. Spark plug
replacement is recommended at the start of
each season. Refer to engine parts list for
correct spark plug type.
.030 ” Feeler
your engine is equipped with a spark arrester
screen assembly, remove every 50 hours for
cleaning and inspection. Replace if damaged.
WARNING: Do not operate the chipper
shredder without a muffler, or tamper with
the exhaust system. Damaged mufflers or
spark arresters could create a fire hazard.
LUBRICATION
• Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 15 to avoid overspeeding,
overheating and engine damage. Clean more
often if necessary.
NOTE: Cleaning with a forceful spray of waferrs not
recommended as water could contaminate the fuel
system.
Lubricate the pivot points on the release bar, hopper
assembly, and discharge chute once a season using
a light oil. Refer to the lubrication chart in figure 17.
Figure 17
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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
• 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
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.
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.
14
Page 15
Shredding Blade
The shredding blade may be removed for sharpening
or replacement as follows.
• Disconnect spark plug wire and move it away
from spark plug.
• Lower the hopper assembly. Block up the
housing. See figure 20.
Weld Bolt
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
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 21.
When reassembling the blade, tighten center
bolt to between 550 and 650 inch-pounds and
the two outer bolts to between 250 and 350 inch-
pounds, or lacking torque wrench, tighten
securely.
1. Insert screw driver through hole
2. Blade should be parallel to ground
Slîik
____
O 0 o
BU«.»
• 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 discharge chute.
Raise the discharge chute.
• Insert a 112" 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
A
When sharpening the blade, follow the original
the blade to avoid contacting the weld bolts
on the housing.
Ground
Figure 21
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 persona! 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.
15
Page 16
STORAGE
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 building 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.
• 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 gasoline 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.
16
Page 17
TROUBLE-SHOOTING
PROBLEM
Engine fails to start
Loss of power; operation erratic
Engine overheats
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
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. Sen/ice air cleaner.
1. Contact your SEARS service
center.
2. Fill crankcase with proper oil.
Too much vibration
Unit does not discharge
Rate of discharge slows
considerably or composition of
discharged material changes
1. Loose parts or damaged
impeller
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
W /M
contact your nearest SEARS
service center.
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.
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).
17
Page 18
PARTS LIST
SEARS CRAFTSMAN 6.5 H.P. CHIPPER-SHREDDER MODEL 247.775870
20 27
4 : ■ f Id.
‘ . 'i. .
44 V
^ /Vi'’.-"-
18
Page 19
SEARS CRAFTSMAN 6.5 H.P. CHIPPER-SHREDDER MODEL 247.775870
Air Baffle (Left)
Air Baffle (Right)
Screw, 10-24 x 9/16"
Crankshaft
Screw, 10-32 X 63/64”
Lock Nut, 10-32
Piston, Pin, And Ring Set (Std.)
Piston, Pin, And Ring Set (.010” O.S.)
Piston & Pin Ass'y. (Std.) (Incl. 43)
Piston & Pin Ass'y. (.010" O.S,)(lnct. 43)
Piston Pin Retaining Ring
Connecting Rod Ass’y. (tnci. 46 & 49)
Connecting Rod Boit
Valve Lifter