Page 1
OWNER’S
MANUAL
MODEL NOS.
247.795860
247.795861
EiiPTSMflN
Caution;
Read and Follow
All Safety Rules
and Instructions
Before Operating
This Equipment
8 HORSEPOWER
3 CUTTING STAGE
MULCHING AND BAGGING
CHIPPER-SHREDDER
Assembly
Operation
Customer Responsibilities
Service and Adjustment
Repair Parts
SEARS, ROEBUCK AND CO., Hoffman Estates, IL 60195 U.S.A.
Printed in U.S.A.
770-8175H 9/92
Page 2
SAFETY RULES
WARNING: TO REDUCE THE POTENTIAL FOR ANY INJURY, COMPLY WITH THE FOLLOWING
SAFETY INSTRUCTIONS. FAILURE TO COMPLY WITH THE INSTRUCTIONS MAY RESULT IN
PERSONAL INJURY.
TRAINING
® Read this owner's manual carefully in its entirety before
attempting to assemble or operate this machine Be com
pletely familiar with the controls and the proper use of this
machine before operating it Keep this manual in a safe
place for future and regular reference and for ordering
replacement parts.
® Children must never be allowed to operate this equipment
® No one should operate this unit while intoxicated or while
taking medication that impairs the senses or reactions..
• This equipment should never be operated in the vicinity
of children, pets or other persons.
® 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.
® Never place your hands or any part of your body or cloth
ing inside the feeding chamber, discharge chute, or near
any moving part while the machine or engine is running.
© If it is necessary for any reason to inspect or repair the
feeding chamber or any part of the machine where a mov
ing 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 such inspection or repair.
PREPARATION
© Wear safety glasses provided with your unit while operat
ing the chipper-shredder to prevent injury from any mate
rial which may be ejected out of the openings,
® Wear proper apparel. Avoid wearing loose fitting clothing,.
Wear gloves when handling material.
® HANDLE GASOLINE WITH CARE as it is an extremely
flammable fuel
® Check the fuel before starting the engine. Do not fill the
fuel tank indoors, while the engine is running, or while the
engine is still hot. Turn the unit off and let the engine cool
before refueling.
® Fuel your chipper-shredder in a clean area. Do not
smoke while refueling.
® Fuel tank cap must be secure at all times except during
refueling
® Avoid spilling gasoline or oil. Wipe the unit clean of any
spilled fuel or oil.
® Store fuel and oil in approved containers, away from heat
or open flame, and out of reach of children
® This machine should be operated only upon a level surface.
• Assure that all screws, nuts and bolts and other fasteners
are properly secured.
OPERATION
® When feeding shreddable 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.
® If the cutting mechanism strikes any foreign object or if
your machine should start making an unusual noise or
vibration, immediately stop the engine, disconnect the
spark plug wire from the spark plug and move it away
from the spark plug. Allow the machine to stop and take
the following steps:
inspect for damage.
Replace or repair any damaged parts.
Check for any loose parts and tighten to assure contin
ued safe operation
© The engine must be kept clean of debris and other accu
mulations.
® 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 feed opening.
® Never place your hands or any other part of your body or
clothing inside the feeding chamber, discharge chute or
near any moving part while the engine is running,
® Keep all guards and deflectors in place and in good work
ing condition to assure continued safe operation.
® Always stand clear of the discharge area when operating
this machine
® Keep your face and body back from the feed opening to
avoid accidental bounce back of any material.
® Do not over-reach. Keep proper balance and footing at all
times,,
© The engine governor settings on your machine must not
be altered, changed, or tampered with. The governor
controls the maximum safe operating speeds and pro
tects the engine and all moving parts from damage
caused by overspeed.
® Do not transport machine while engine is running
® Do not operate engine if air cleaner or cover directly over
carburetor air intake is removed, except for adjustment.
Removal of such parts could create a fire hazard.
MAINTENANCE AND STORAGE
® When this equipment is stopped for servicing, inspection,
storage or to change an accessory, make sure the spark
plug wire is disconnected from the spark plug and moved
away from the spark plug The machine should be
allowed to cool down before making such inspection,
adjustments, service, etc Maintain your machine with
care and keep it clean for the best and continued safe
operation
® Do not use flammable solutions to clean the air filler
® When not in use, your machine should be stored out of
the reach of children. Keep where gasoline fumes will not
reach an open flame or spark. For long periods of stor
age, refer to the “Storage" section of this manual.
LOOK FOR THIS SYMBOL TO POINT OUT
IMPORTANT SAFETY PRECAUTIONS. IT
MEANS—ATTENTION!!! BECOME ALERT!!!
YOUR SAFETY IS INVOLVED.
Page 3
CCMGRATULATIONS on your purchase of a Sears
Craftsman Chipper-Shredder. It has been designed, engi
neered and manufactured to give you the best possible
dependability and performance.
Should you experience any problem you cannot easily rem
edy, please contact your nearest Sears Service Center/
Department in the United States, We have competent, welltrained technicians and the proper tools to service or repair
this unit.
Please read and retain this manual. The instructions will
enable you to assemble and maintain your chipper-shredder
properly Always observe the “SAFETY RULES "
MODEL
NUMBER.
SERIAL
NUMBER
DATE OF
PURCHASE.
PRODUCT SPECIFICATIONS
Horsepower:
Displacement:
Fuel Capacity:
Spark Plug (Gap .030 in ):
Magnetron® Ignition Air Gap:
MAINTENANCE AGREEMENT
8,0
19,44 cu, in
1 Gallon
(Unleaded)
Champion
J19LM (or
Equivalent)
.0125 in
THE MODEL AND SERIAL NUMBERS WILL BE FOUND
ON A LABEL ATTACHED TO THE FRAME OF THE
CHIPPER-SHREDDER.
YOU SHOULD RECORD BOTH SERIAL NUMBER AND
DATE OF PURCHASE AND KEEP IN A SAFE PLACE
FOR FUTURE REFERENCE.
CUSTOMER RESPONSIBILITIES
Read and observe the safety rules.
Follow a regular schedule in maintaining, caring for
and using your chipper-shredder ,
Follow the instructions under "Customer Respons
ibilities” and “Storage" sections of this Owner’s
Manual.
A Sears Maintenance Agreement is available on this
product Contact your nearest Sears store for details
WARNING: This unit is equipped with an internal combus
tion engine and should not be used on or near any unim
proved forest-covered, brush-covered or grass-covered land
unless the engine’s exhaust system is equipped with a
spark arrester meeting applicabie local or state laws (if any),
if a spark arrester is used, it should be maintained in effec
tive working 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.)
WARRANTY
ONE YEAR LIMITED WARRANTY ON CRAFTSMAN GAS CHIPPER-SHREDDER
For one year from the date of purchase, when this Craftsman Chipper-Shredder is maintained, lubricated and
tuned up according to the instructions in the owner's manual, Sears will repair, free of charge, any defect in
material and workmanship
If this Craftsman Chipper-Shredder is used for commercial or rental purposes, this warranty applies for only 30
days from the date of purchase.
This warranty does not cover:
® Expendable items which become worn during norma! use, such as blades, chipper blades, flails, air cleaners,
spark plugs and catcher bags.
® Repairs necessary because of operator abuse or negligence, including bent crankshafts and the failure to
maintain the equipment according to the instructions contained in the owner’s manual.
WARRANTY SERVICE IS AVAILABLE BY RETURNING THE CRAFTSMAN CHIPPER-SHREDDER TO THE
NEAREST SEARS SERVICE CENTER/DEPARTMENT 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 may vary from state to
state,
SEARS, ROEBUCK AND CO., D/817WA, Hoffman Estates, IL 60195
Page 4
TABLE OF CONTENTS
SAFETY RULES
PRODUCT SPECIFICATIONS
WARRANTY..............................................................3
INDEX.,..
ASSEMBLY............................................................5-7
OPERATION..................................................... 7-10
CUSTOMER RESPONSIBILITIES
..................................................................
.....................................................
.................................
.....................
11, 12
2
4
INDEX
A
Adjustments;
Carburetor
Engine Speed.
Assembly Instructions:
Catcher Bag
Chute Crank Deflector
Hopper Assembly
Catcher Bag
Controls............................
Customer Responsibilities
Engine;
Maintenance
Starting
Stopping
Storage
Fuel
.....
Lubrication
.....
......
....
...................
.................
...........
......
........
.........
.
................
.......
...
.......
................
...........
.......
.....
..............
.
..
C
.................
E
.
F
.
L
..................
....
....
....
.....................
.........................
..............
.................
.......................
.........................
.............
.........................
.......................
6,7
3, 11,12
11. 12
.......
...13
3
15
.15
6
10
11
STORAGE...............................................................13
SERVICE AND ADJUSTMENT
TROUBLE SHOOTING
PARTS ORDERING/SERVICE
REPAIR PARTS—CHIPPER-SHREDDER
REPAIR PARTS—ENGINE............
Oil...............................
Operating Tips...........
Repair/Replacement Parts
6
6
7
8
9
Responsibilities. Customer
Safety Rules
Sharpening
Service Recommendations.
Spark Plug
Specifications
Storage
Table of Contents ................................................
Trouble Shooting
Unciogging.,..............................
Unpacking,
Warranty ................................................................. .3
___
.................
..........................
.........
..................................................................
.....
................................................
..........................................
____
___
........
............
.....................................................16
.........................
.............................
...................
O
...................
..................
.......
......................
.............................
T
U
.......
___
_____13, 14
W
.....
...17, 18
...17-23
3,11-13
...........
.........
.........
...........
5
13-15
16
16
19-23
9
8
2
.14, 15
11
12
3
13
4
Maintenance;
Agreement ..................
Schedule
Engine
Chipper-Shredder
......................
..........
...............
.......
.........................
.......................
.................
.......................
11. 12
3
11
11
Page 5
ASSEMBLY INSTRUCTIONS
IMPORTANT: This unit is shipped WITHOUT GASO
il
Flat
Washer
5/16" I.D
-^Hex Lock
Nut 5/16-18
Thread
Hex Bolt
'5/16-18x8-3/8" Long
LINE or OIL After assembly, see operation section of
this manual for proper fuel and engine oil recommen
dations.
NOTE: To determine right and left hand sides of your
chipper-shredder, stand behind and face the hopper
(engine is at the front of the unit).
Your chipper-shredder has been completely assem
bled at the factory, except for the hopper assembly
(hopper hood and upper leaf ramp section have been
sub-assembled), upper guide assembly, chute deflec
tor and the catcher bag The hardware pack and safe
ty glasses are also included in the carton
The hardware pack contains the parts shown in figure
1 (shown full size)
TO REMOVE CHIPPER-SHREDDER FROM CARTON
Cut the corners of the carton. Remove all packing
inserts. Roll chipper-shredder out of the carton Make
certain all parts and literature have been removed
before the carton is discarded
TOOLS REQUIRED FOR ASSEMBLY
(1) Phillips Screwdriver
(2) 1/2" or Adjustable Wrenches
(2) 7/16" or Adjustable Wrenches
Truss Machine Screws
1/4-20 X 1/2" Long
Hex Lock Nuts
1/4-20 Thread
FIGURE 1.
Page 6
Spacers
(Inside
Hinge)
Hex Lock
Nut
Hand
Knob
FIGURE 2.
FIGURE 3.
Hopper Pivot
Door
ASSEMBLE THIS \ / / Truss
TRUSS SCREW
AND NUT FIRST
Release
Bar
'upper Screw and Nut
Guide
Assembly
FIGURE 4.
Housing
Assembly
Hex Bolt
Chute
Deflector
Hopper Assembly
Ramp
Section
Remove Truss
Drawstring
HOW TO SET-UP YOUR CHIPPER-SHREDHER
MAKE CERTAIN THE SPARK PLUG
WIRE IS DISCONNECTED AND MOVED
A
-^.ATTACHING THE CHUTE DEFLECTOR
® Remove the hand knobs and cupped washers from
each side of the discharge opening on the left side
of the chipper-shredder
® Remove hex lock nut, two spacers and hex bolt
from inside the hinge on top of the housing assem
bly Do not remove one spacer from the hex bolt.
® Place the chute deflector in position on the dis
charge opening Insert hex bolt and spacer through
hinge on chute deflector and housing (spacer fits
inside of hinge). See figure 2.
@ Place second spacer over hex bolt, inside other
part of hinge. Secure with hex lock nut. Tighten
securely.
® Secure both sides of chute deflector to housing
using hand knobs and cupped washers {cupped side
of washers go against chute deflector)
-«(“ATTACHING THE UPPER GUIDE ASSEMBLY
Place upper guide assembly in position on frame,
making certain edges of the upper guide assembly
are underneath stop washers, and the release bar is
in the slots. See figure 3 Insert hex bolt 8-3/8“ long
through upper guide assembly and frame, Secure
with flat washer and hex lock nut.
NOTE: Make certain upper guide assembly can pivot
by pulling up on release bar and lowering upper guide
assembly If necessary, loosen hex lock nut a turn or
two Put the upper guide assembly back into the
raised position.
^“ATTACHING THE HOPPER ASSEMBLY
Your chipper-shredder has been shipped with the
upper leaf ramp section attached to the hopper
assembly See figure 4. Attach the hopper assembly
to the upper guide assembly as follows, Be certain to
place heads of all truss machine screws
hopper assembly.
® Remove one truss machine screw and nut from
each side of hopper assembly as shown in figure 4,
Push hopper pivot door down inside lower part
of hopper as you place hopper assembly (both
pieces) inside upper guide assembly. Replace
truss screws and nuts Just removed, using the hole
shown in figure 4, one on each side Tighten finger
tight only.
® Place the six truss machine screws and nuts found
in hardware pack in the remaining holes of hopper
assembly, alternating sides of the unit and tighten
ing finger tight only.
® After assembling all eight screws, tighten them
securely.
AWAY FROM THE SPARK PLUG
BEFORE ASSEMBLING THE CHIPPER
SHREDDER.
inside of
FIGURE 5.
4-ATTACHING THE CATCHER BAG
Your chipper-shredder is equipped with a catcher bag
to catch the shredded material
Page 7
To attach the bag, place the opening of the bag
over the chute deflector so it completely covers the
chute opening. Depress the plunger on the draw
string, and puli on the drawstring until the bag is
tight around the chute opening. Release plunger to
lock it into position See figure 5,
OPERATION
KNOW YOUR CHIPPER-SHREDDER
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR CHIPPER-SHREDDER.
Compare the illustrations with your chipper-shredder to familiarize yourself with the location of various controls
and adjustments. Save this manual for future reference
Hopper
Assembly
Chipper
Chute
Oil Fill
Dipstick
Engine
Shut-Off
Switch
Choke
Lever,
Starter
Handle
FIGURE 6—Model 247.795861 Shown.
......
.........................
MEETS ANSI SAFETY STANDARDS
Sears chipper-shredders conform to the safety standard B71 6-1982 of the American National Standards Institute.
OPERATING CONTROLS (See figure 6)
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.
BEFORE USING YOUR CHIPPER-SHREDDER, AGAIN REFER TO THE “SAFETY RULES” AS SHOWN ON
PAGE 2 OF THIS MANUAL ALWAYS BE CAREFUL
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 the safety glasses pro
vided with the chipper-shredder or eye shields before chipping or shredding, or while
performing any adjustments or repairs. We recommend Wide Vision Safety Mask for
over spectacles or standard glasses available at Sears Retail or Catalog Stores.
ENGINE SHUT-OFF SWITCH—Used to stop the
engine.
FUEL SHUT-OFF VALVE—Used to stop the flow of
fuel into the carburetor (located beneath the fuel
tank)
Page 8
TO STOP ENGINE
® Move engine shut-off switch to OFF position See
figure 6.
® Disconnect spark plug wire and move away from
spark plug to prevent accidental starting while
equipment is unattended,
• Close fuel shut-off valve when equipment is not in
use to prevent fuel leakage.
No Larger Than
1/2" Diameter
(Recommended)
Or 1" Diameter
Hopper
Assembly
HOW TO USE YOUR CHIPPER-SHREDDER
Do not attempt to shred or chip any material other
than vegetation found in a normal yard (i„e. , branches,
leaves, twigs, etc.)
WARNING: THE CHIPPER-SHREDDER
DISCHARGES MATERIALS WITH CON
A
The chipper-shredder is designed for three different
methods of operation.
® Leaves and small branches up to 1/2” diameter
(recommended) or 1" diameter (maximum) can be
fed into the hopper assembly when it is in the
raised position. See figure 7, If it becomes neces
sary 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 gets into the impeller assembly.
SIDERABLE VELOCITY. KEEP AWAY
FROM THE AREA AROUND THE CHUTE
DEFLECTOR. ALWAYS STOP THE
ENGINE AND DISCONNECT THE SPARK
PLUG WIRE WHEN REMOVING OR
ATTACHING THE BAG WHEN CHANGING
CONTAINERS OR WHEN REMOVING THE
SHREDDED MATERIAL. WEAR SAFETY
GLASSES AND GLOVES WHENEVER
USING YOUR CHIPPER-SHREDDER.
FIGURE?.
® Leaves and small twigs can be raked into the hop
per assembly when the hopper assembly is low
ered to the ground. See figure 8. Small branches
up to 1/2" diameter (recommended) or 1" diam
eter (maximum) can also be fed into the hopper
assembly in this position See figure 9
FIGURES.
A
WARNING: DO NOT PUT MATERIAL
LARGER THAN 1/2" IN DIAMETER (REC
OMMENDED) or 1" DIAMETER (MAXI
MUM) INTO THE HOPPER ASSEMBLY.
MATERIAL UP TO A MAXIMUM OF 3" IN
DIAMETER MATERIAL MAY BE FED
INTO THE CHIPPER CHUTE. DO NOT
ATTEMPT TO SHRED OR CHIP ANY
MATERIAL LARGER THAN 3" IN DIAME
TER. PERSONAL INJURY OR DAMAGE
TO THE MACHINE COULD RESULT.
Page 9
© To lower the hopper assembly, use one hand to
grasp the handle at the top of the hopper assembly
and lift slightly Pull up on the release bar, and
lower the hopper assembly to the ground Release
the bar. See figure 10,
GAS AND OIL FILL-UP
OIL
Only use high quality detergent oil rated with API ser
vice classification SG. Select the oil’s viscosity grade
according to your expected operating temperature.
Colder <a------------------- 32°F
----------------
Warmer
Bulky material, such as stalks or heavy branches,
up to 3" in diameter, should be fed into the chipper
chute See figure 11,
WARNING: MAKE CERTAIN THE CHIP
PER CHUTE DOOR IS CLOSED WHEN
NOT IN USE.
3” Maximum
Diameter
5W30
NOTE: Although multi-viscosity oils (5W30, 10W30,
etc.) improve starting in cold weather, these multi
viscosity oils will result in Increased oil consumption
when used above 32°F. Check your oil level more fre
quently to avoid possible engine damage from run
ning low on oil.
® Fill engine with oil as follows. Remove oil fill dip
stick See figure 12. With chipper-shredder level,
use a funnel to fill engine with oil to FULL mark on
dipstick. Capacity is approximately 2-3/4 pints. Be
careful not to overfill. Tilt chipper-shredder toward
the left (from behind the hopper), then re-level,
Check oil level. Refill to FULL mark on dipstick if
necessary. Replace dipstick and tighten,
SAE 30
Chipper
Chute
Oil
Drain
FIGURE 11.
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. For best per
formance, 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 dis
charged 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.
FIGURE 12.
GAS
® Remove fuel cap and fill fuel tank with about 1 gal
lon of clean, fresh, lead-free grade automotive
gasoline. DO NOT use Ethyl or high octane gaso
line. Be certain container is clean and free from
rust or foreign particles Never use gasoline that
may be stale from long periods of storage In the
container. Replace fuel cap.
WARNING: DO NOT FILL CLOSER THAN
1/2 INCH OF TOP OF FUEL TANK TO
A
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.
Page 10
Check the fuel level periodically to avoid running out
of gasoline while operating the chipper-shredder, if
the unit runs out of gas as it is shredding or 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
WARNING: EXPERIENCE INDICATES THAT ALCO
HOL 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 OR TREATED WITH FUEL
STABILIZER BEFORE STORAGE FOR 30 DAYS
OR LONGER. USE FRESH FUEL NEXT SEASON.
SEE “STORAGE” SECTION FOR ADDITIONAL
INFORMATION.
NEVER USE ENGINE OR CARBURETOR CLEAN
ER PRODUCTS IN THE FUEL TANK OR PERMA
NENT DAMAGE MAY OCCUR.
® Attach spark plug wire and rubber boot to spark
piug if necessary . See figure 13,
® Open fuel shut-off vaive by turning in direction of
arrow severai turns. See figure 14.
® Move choke lever down to CHOKE position,
® Place the engine shut-off switch in ON position
See figure 14,
® Grasp starter handle (see figure 13) and pull rope
out slowly until engine reaches start of compres
sion cycle (rope wiii pull slightly harder at this
point) Let the rope rewind slowly.
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 mech
anism failing into place, and should be expected. In
addition, the flails and fingers will be noisy after the
engine is started, until the impeiler reaches full speed,
® Pull rope with a rapid, continuous, full arm stroke
Keep a firm grip on start handle Let rope rewind
slowly. Do not let starter handle snap back against
starter.
® Repeat preceding two instructions until engine
fires. When engine starts, move choke lever on
engine halfway between CHOKE and RUN.
NOTE: If engine does not fire after three attempts,
move choke iever halfway between CHOKE and RUN
position and try again. See figure 14.
TO START ENGINE
WARNING: BE SURE NO ONE OTHER
THAN THE OPERATOR IS STANDING
A
NEAR THE CHIPPER-SHREDDER WHILE
STARTING OR OPERATING. DO NOT
OPERATE THIS CHIPPER-SHREDDER
UNLESS THE CHUTE DEFLECTOR HAS
BEEN PROPERLY INSTALLED AND IS
SECURED WITH THE HAND KNOBS.
_
_____
_
___
—.—
To
Choke ^
Fuel Shut-Off Choke Lever
Vaive
FIGURE 14.
To
OFFxCl
Engine Shut-Off
Switch
TO STOP ENGINE
® Move engine shut-off switch to OFF position, See
figure 14,
® Disconnect spark plug wire and move away from
spark plug to prevent accidental starting while
equipment is unattended
9 Close fuel shut-off valve when equipment is not in
use to prevent fuel leakage.
10
Page 11
CUSTOMER RESPONSIBILITIES
V CHECK
GENERAL RECOMIVIENDATIONS
WARNING: ALWAYS STOP THE ENGINE
AND DISCONNECT THE SPARK PLUG
A
® Periodically check all fasteners and be sure they
are tight,
® Follow the Maintenance Schedule above
WIRE BEFORE PERFORMING ANY
MAINTENANCE OR ADJUSTMENTS.
CHIPPER-SHREDDER
LUBRICATION
Lubricate the pivot points on the release bar, hopper
assembly, chute deflector and chipper chute once a
season using a iight oil.
ENGINE
ENGINE OIL
Only use high quality detergent oil rated with API ser
vice classification SG. Select the oil’s viscosity grade
according to your expected operating temperature
Colder
5W30
32'’F Warmer
SAE 30
NOTE: Although multi-viscosity oiis (SE30, 10W30,
etc.) improve starting in cold weather, these multi- vis
cosity oiis will result in increased oil consumption
when used above 32°F. Check your oil level more fre
quently to avoid possible engine damage from run
ning low on oil.
Your four-cycle engine will normally consume some
oil—therefore, check engine oil level regularly approx
imately every five hours of operation and before each
usage. Stop engine and wait several minutes before
checking oil level. With engine level, the oil must be to
FULL mark on dipstick {refer to figure 12). 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
a. Remove oil drain plug. Refer to figure 11. Catch
oil in a suitable container.
b 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.
11
Page 12
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 per
formance.
Never run your engine without air cleaner com
pletely assembled.
To Service Air Cleaner:
Service pre-cieaner after every 25 hours of use, or at
least once a season. Service cartridge every 100
hours of use, or at least once a season. Service pre
cleaner and cartridge more often under dusty condi
tions,
® Remove wing nut and cover.
© To service foam pre-cleaner: Remove pre-cleaner
by sliding it off the cartridge. Wash in liquid deter
gent and water . Squeeze dry in a clean cloth.
Saturate in engine oil. Squeeze in a clean,
absorbent cloth to remove all excess oil. If pre
cleaner is very dirty, replace it.
© To service cartridge: Remove cartridge by remov
ing wing nut and lifting off cup and cartridge. Clean
by tapping gerrtly on a flat surface If very dirty,
replace Do not oil cartridge.
NOTE: Do not use petroleum solvents (e.g, kerosene)
or pressurized air to clean cartridge. They will cause
cartridge to deteriorate.
® Reinstall cartridge, cup, pre-cleaner and cover,
® Fasten wing nuts securely.
....................
—
-Wing Nut
(Upper)
-Cover
Foam
Pre-Cleaner
Wing Nut
CLEAN ENGINE :
Clean engine periodically. Remove dirt and debris
with a cloth or brush. Cleaning with a forceful spray of
water is not recommended as water could contami
nate the fuel system.
Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 17 to avoid overspeeding, overheating
and engine damage. Clean more often if necessary.
WARNING: PERIODICALLY CLEAN MUF
A
LEANING
The chipper-shredder may be cleaned 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.
SPARK PLUG
The spark plug should be cleaned and the gap reset
to .030" at least once a season or every 50 hours of
operation. See figure 18. Spark plug replacement is
recommended at the start of each season. Refer to
engine parts list for correct spark plug type,
NOTE: Do not sandblast spark plug. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
FLER AREA TO REMOVE ALL GRASS,
DIRT AND COMBUSTIBLE DEBRIS.
Cup
I ■<—Cartridge
FIGURE 15.
FUEL FILTER
Your engine is equipped with a replaceable in-line fuel
filter. Replace the fuel filter every season. See figure
16. Refer to engine parts list for correct replacement
filter.
FIGURE 16.
MUFFLER
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. 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.
12
Page 13
STORAGE
Prepare your chipper-shredder for storage at the end
of the season or if the unit wiil not be used for 30 days
or more.
WARNING: NEVER STORE MACHINE
WITH FUEL IN THE FUEL TANK INSIDE
A
NOTE: A yearly check-up by your local Sears Service
Center is a good way to make certain your chipper
shredder wiil provide maximum performance for the
next season
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 SEPARA
TION AND FORMATION OF ACIDS DURING STOR
AGE ACIDIC GAS CAN DAMAGE THE FUEL SYS
TEM 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 stor
age 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 carbure
tor 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 table
spoon) 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 andfor 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.
SERVICE & ADJUSTMENT
WARNING: ALWAYS STOP ENGINE AND
DISCONNECT SPARK PLUG WIRE AND
A
REMOVING THE FLAIL SCREEN
If the discharge area becomes clogged, remove the
flail screen and clean area as follows.
® Stop the engine, make certain the chipper-shredder
has come to a complete stop and disconnect spark
plug wire from the spark plug before unclogging the
chute.
MOVE IT AWAY FROM SPARK PLUG
before performing any ADJUST-
hflPhlTC OD QPDAinC
RHUfNI I wM Mcir rtlriv5r>
Loosen the two hand knobs on each side of the
chute deflector. Lift the chute deflector up, and tie it
out of the way.
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 19,
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 19.
13
Page 14
SHABPEE^ING OR REPLACING THE BLADES
CHIPPER BLADES
® Disconnect spark plug wire and move it away from
spark plug.
® Remove the flail screen as instructed in previous
section.
® Remove the chipper chute by removing three hex
nuts and washers, A 1/2" wrench is required. See
figure 19.
NOTE: When reassembling, the cupped washer goes
on 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 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 hous
ing). See figure 20.
® Remove the other blade in the same manner.
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 19 (sharp
edge is assembled toward the slotted opening in the
impeller assembly).
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 21,
® 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 open
ing on the back-up plate is toward the bottom of the
unit. The back-up plate may be reversed to provide a
new cutting edge.
Wrench
FIGURE 21.
® Loosen the two hand knobs and cupped washers
which secure the chute deflector, and 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.
Page 15
NCrrE: Use caution when removing 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 unbal
anced 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 22.
® When reassembling the blade, tighten to between
550 and 650 inch pounds, or lacking torque
wrench, tighten securely.,
FLAILS
The flails, located inside the housing, may be
reversed when they become dull it is suggested that
this procedure be performed by your nearest Sears
Service Department
CARBURETOR ADJUSTMENT
WARNING: IF ANY ADJUSTWIENTS ARE
A
MADE TO THE ENGINE WHILE THE
ENGINE IS RUNNING (E.G. CARBURE
TOR), KEEP CLEAR OF ALL MOVING
PARTS. BE CAREFUL OF HEATED SUR
FACES AND MUFFLER.
The carburetor may need re-adjusting if engine lacks
power or does not idle properly If adjustments are
needed, proceed as follows.
© Close needle valve (see figure 23) clockwise
(r> ) finger tight oniy. Forcing may cause damage.
Then open 1-1/2 turns counterclockwise ()
® Start engine and allow to warm for five minutes
© Close needle valve clockwise (^ ) until engine
starts to lose speed (lean mixture). Then slowly
open needle valve counterclockwise ( ) until
engine JUST BEGINS to run unevenly. This mix
ture should be rich enough for best performance
under load.
® Rotate throttle counterclockwise {} and hold
against throttle stop.
If engine idles, no further adjustment is necessary.
If engine idles too fast, turn idle speed adjusting
screw counterclockwise {) until slower speed is
obtained.
if engine dies, turn idle speed adjusting screw 1/4
turn clockwise (4^ ) Place throttle control in FAST
position and restart engine.
Move throttle control to IDLE position, if engine
does not idle, repeat third step
® Test the engine by using the chipper-shredder. If
engine tends to stall or die out, it usually indicates
that the mixture is slightly lean and it may be nec
essary to open (>^ ) the needle valve slightly to
provide a richer mixture This richer mixture may
cause a slight unevenness in idling.
Idle Speed Adjusting Screw
Throttle
Idle Mixture
Minor carburetor adjustment may be required to com
pensate for differences in fuel, temperature, altitude
or load.
NOTE: A DIRTY AIR CLEANER WILL CAUSE
ENGINE TO RUN ROUGH, BE CERTAIN AIR
CLEANER IS CLEAN AND ATTACHED TO THE
CARBURETOR BEFORE ADJUSTING CARBURE
TOR. DO NOT MAKE UNNECESSARY ADJUST
MENTS FACTORY SETTINGS ARE SATISFACTO
RY FOR MOST APPLICATIONS AND CONDITIONS
Never attempt to change maximum engine speed. It is
pre-set at the factory and should be changed only by
a qualified service technician who has the necessary
equipment
Needle Valve
(High Speed)
FIGURE 23.
ENGINE SPEED
Your engine speed has been factory set 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 adjust
ment.
15
Page 16
TROUBLE SHOOTING
PROBLEM
Engine fails to start
Loss of power;
operation erratic
Engine overheats
Too much vibration
Unit does not
discharge
Rate of discharge
slows considerably or
composition of
discharged material
changes
POSSIBLE CAUSE(S)
® Fuel shut-off valve closed.
® Fuel tank empty, or stale fuel.
® Spark plug wire disconnected.
® Faulty spark plug.
® Spark plug wire loose.
® Unit running on CHOKE.
@ Blocked fuel line or stale fuel,
® Water or dirt in fuel system,
• Carburetor out of adjustment
® Dirty air cleaner.
® Carburetor not adjusted
properly
® Engine oil level low.
0 Loose parts or damaged
impeller.
® Discharge chute clogged,
® Foreign object lodged in impeller.
® Shredding blade and/or chipper
blades dull
CORRECTIVE ACTION
® Open fuel shut-off valve
® Fill tank with clean, fresh fuel.
• Connect wire to spark plug.
® Clean, adjust gap or replace.
® Connect and tighten spark plug wire.
® Move choke lever to CFF position
® Clean fuel line; fill tank with clean
fresh gasoline.
® Disconnect fuel line at carburetor to drain fuel
tank. Refill with fresh fuel.
® Adjust carburetor or contact your SEARS
Service Center.
® Service air cleaner. See Customer Responsibilities
section of this manual.
® Contact your SEARS Service Center.
® Fill crankcase with proper oil.
® 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.
® Stop engine immediately and disconnect
spark plug wire. Clean flail screen and inside
of blower housing. See Service/Adjustments
section of this manual.
® Stop engine Immediately and disconnect
spark plug wire. Remove lodged object.
® Sharpen or replace shredding and chipper
blades
NOTE; For repairs beyond the minor adjustments listed above, please contact your nearest SEARS Service Center.
HOW TO ORDER REPLACEMENT PARTS
Each chipper-shredder has its own model number.
Each engine has its own model number.
The model number for your chipper-shredder will be
found on a label attached to the frame
The model number for the engine will be found on the
blower housing of the engine
All parts listed herein may be ordered through Sears,
Roebuck and Co. Service Centers and most Retail
Stores
WHEN ORDERING REPAIR PARTS, ALWAYS GIVE
THE FOLLOWING INFORMATION:
‘PRODUCT - “8 H.P. Chipper-Shredder”
‘MODEL NUMBER - 247.795860
247.795861
‘ENGINE MODEL NO. -190412-6143-01
190432-6117-01
‘PART NUMBER ‘PART DESCRIPTION
Your Sears merchandise has added value when you
consider that Sears has service units nationwide
staffed with Sears trained technicians
......
professional
technicians specifically trained on Sears products,
having the parts, tools and the equipment to insure
that we meet our pledge to you...“we service what we
sell."
16
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