Craftsman 247.776350 User Manual [en, es]
Operator’s Manual
7.5 Horse Power
CHIPPER SHREDDER
Model No. 247.776350
CAUTION: Before
using this product,
read this manual and
follow all safety rules
and operating
instructions.
For answers to your questions about this product, call:
1-800-659-5917
Sears Craftsman Help Line
(5 am. - 5 pm., Mon. - Sat.)
• Safety
• Operation
• Maintenance
• Storage
• Español, p. 29
Sears, Roebuck And Co., Hoffman Estates, IL 60179 U.S.A.
Visit our website: www.sears.com/craftsman
Printed in U.S.A.
FORM NO.
769-00831A.fm
(4/2004)
TABLE OF CONTENTS
Content Page
Warranty 2
Safety 3
Assembly 6
Operation 8
Maintenance 13
Content Page
Service and Adjustments 15
Storage 17
Troubleshooting 18
Parts List 20
Español 29
WARRANTY
Limited Warranty on Craftsman Chipper Shredder
For one (1) year from the date of purchase, if this Craftsman Equipment is maintained, lubricated, and tuned up
according to the instructions to the operator’s manual, Sears will repair or replace free of charge any parts found to
be defective in material or workmanship. Warranty service is available free of charge by returning Craftsman
equipment to your nearest Sears Service Center. In-home warranty service is available but a trip charge will apply.
This Warranty applies only while this product is in the United States.
This Warranty does not cover:
• Expendable items which become worn during normal use, such as sp ark plugs, air cleaners, belts, and oil
filters.
• Tire replacement or repair caused by punctures from outside objects, such as nails, thorns, stumps, or glass.
• Repairs necessary because of operator abuse, including b ut not limited to, damage caused by objects, such as
stones or metal debris, oversized stock, impacting objects that b end the frame or crankshaft, or over-speeding
the engine.
• Repairs necessary because of operator negligence, including but not limited to, electrical and me chanical
damage caused by improper storage, failure to use the proper grade and amount of engine oil, or failure to
maintain the equipment according to the instructions contained in the operator’s manual.
• Engine (fuel system) cleaning or repairs caused by fuel determine to be contaminated or oxidized (stale). In
general, fuel should be used within 30 days of its purchase date.
• Equipment used for commercial or rental purposes.
TO LOCATE THE NEAREST SEARS SERVICE CENTER OR TO SCHEDULE SERVICE, CONT ACT SEARS AT
1-800-4-MY-HOME®.
This warranty gives you specific legal rights and you may also have other rights, which vary from state to state.
PRODUCT SPECIFICATION
Horsepower: 7.5 Horse Power
Engine Oil Type SAE 30
Engine Oil Capacity 20 Ounces
Fuel Capacity: 3 Quarts
Spark Plug Champion QC-12YC
Spark Plug Gap .030"
Model Number.........................................................
Serial Number...........................................................
Date of Purchase......................................................
Record both serial number and date of purchase and
keep in a safe place for future reference.
2
247.776350
SAFETY
WARNING: This symbol points out important safety instructions which, if n ot followed, could
endanger the personal safety and/or property of yourself and others . Read and follow all instructions in
this manual before attempting to operate this machine. Failure to comply with these instruction s may
result in personal injury. When you see this symbol - heed its warning.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle
components contain or emit chemicals known to State of Calif ornia to cause cancer
and birth defects or other reproductive harm.
DANGER
manual. As with any type of power equipment, carelessness or error on the part of the operator can
result in serious injury. This machine is capable of amputating hands and feet and throwing objects.
Failure to observe the following safety instructions could result in serious in jury or death.
: This machine was built to be operated according to the rules for safe operation in this
TRAINING
1. Read, understand, and follow all instructions on the
machine and in the manual(s) before attempting to
assemble and operate. Keep this manual in a safe
place for future and regular reference and for
ordering replacement parts.
2. Be familiar with all controls and their proper
operation. Know how to stop the machine and
disengage them quickly.
3. Never allow children under 16 years old to operate
this machine. Children 16 years old and over
should read and understand the operation
instructions and safety rules in this manual and
should be trained and supervised by a parent.
4. Never allow adults to operate this machine without
proper instruction.
5. Keep bystanders, helpers, pets, and children at
least 75 feet from the machine while it is in
operation. Stop machine if anyone enters the area.
6. Never run an engine indoors or in a poorly
ventilated area. Engine exhaust contains carbon
monoxide, an odorless and deadly gas.
7. Do not put hands and feet near rotating parts or in
the feeding chambers and discharge opening.
Contact with the rotating impeller can amputate
fingers, hands, and feet.
8. Never attempt to unclog the chipper chute or
discharge opening, remove or empty bag, or
inspect and repair the machine while the engine is
running. Shut the engine off and wait until all
moving parts have come to a complete stop.
Disconnect spark plug wire and keep away from
spark plug.
PREPARATION
1. Thoroughly inspect the area where the equipment
is to be used. Remove all rocks, bottles, cans, or
other foreign objects which could be picked up or
thrown and cause personal injury or damage to the
machine.
2. Always wear safety glasses or safety goggles
during operation or while performing an adjustment
or repair, to protect eyes. Thrown objects which
ricochet can cause serious injury to the eyes.
3. Wear sturdy, rough-soled work shoes and closefitting slacks and shirts. Loose fitting clothes or
jewelry can be caught in movable parts. Never
operate this machine in bare feet or sandals. Wear
leather work gloves when feeding material in the
chipper chute.
4. Before starting, check all bolts and screws for
proper tightness to be sure the machine is in safe
working condition. Also, visually inspect machine
for any damage at frequent intervals.
5. To avoid personal injury or property damage use
extreme care in handling gasoline. Gasoline is
extremely flammable and the vapors are explosive.
Serious personal injury can occur when gasoline is
spilled on yourself or your clothes which can ignite.
Wash your skin and change clothes immediately.
a. Use only an approved gasoline container.
b. Extinguish all cigarettes, cigars, pipes, and
other sources of ignition.
c. Never fuel machine indoors.
d. Never remove gas cap or add fuel while the
engine is hot or running.
e. Allow engine to cool at least two minutes
before refueling.
f. Never over fill fuel tank. Fill tank to no more
than 1/2 inch below bottom of filler neck to
provide space for fuel expansion.
3
g. Replace gasoline cap and tighten securely.
h. If gasoline is spilled, wipe it off the engine
and equipment. Move machine to another
area. Wait 5 minutes before starting the
engine.
i. Never store the machine or fuel container
inside where there is an open flame, spark,
or pilot light (e.g. furnace, water heater,
space heater, clothes dryer, etc.)
j. To reduce a fire hazard, keep machine free
of grass, leaves, or other debris build-up.
Clean up oil or fuel spillage and remove any
fuel soaked debris.
k. Allow machine to cool at least 5 minutes
before storing.
OPERATION
1. Do not put hands and feet near rotating parts or in
the feeding chambers and discharge opening.
Contact with the rotating impeller can amputate
fingers, hands, and feet.
2. Before starting the machine, make sure the chipper
chute, feed intake, and cutting chamber are empty
and free of all debris.
3. Thoroughly inspect all material to be shredded and
remove any metal, rocks, bottles, cans, or other
foreign objects which could cause persona l injury
or damage to the machine.
4. If it becomes necessary to push material through
the shredder hopper, use a small diameter stick. Do
not use your hands or feet.
5. If the impeller strikes a foreign object or if your
machine should start making an unusual noise or
vibration, immediately shut the engine off. Allow the
impeller to come to a complete stop. Disconnec t
spark plug wire and keep away from spark plug.
Perform 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.
6. Do not allow an accumulation of processed
material to build up in the reduction chamber. This
can prevent proper discharge and result in kickback
of material through the feed opening.
7. Do not attempt to shred or chip ma terial larger than
specified on the machine or in this manual.
Personal injury or machine damage could result.
8. Never attempt to unclog the chipper chute or
discharge opening while the engine is running.
Shut the engine off, wait until all moving parts have
stopped, disconnect spark plug wire and keep
away from spark plug before clearing debris.
9. Never operate without the shredder hopper,
chipper chute, or chute deflector properly attached
to the machine. Never install or remove debris
collection bag while the engine is running.
10. Keep all guards, deflectors and safety devices in
place and operating properly.
11. Keep your face and body back and to the s ide of
the chipper chute while feeding material into the
machine to avoid accidental kickback injuries.
12. Never operate this machine without good visibility
or light.
13. Do not operate this machine on a paved, gravel or
non-level surface.
14. Do not operate this machine while under the
influence of alcohol or drugs.
15. Muffler and engine become hot and can cause a
burn. Do not touch.
16. Never pick up or carry machine while the engine is
running.
MAINTENANCE AND STORAGE
1. Never tamper with safety devices. Check their
proper operation regularly.
2. Check bolts and screws for proper tightness at
frequent intervals to keep the machine in safe
working condition. Also, visually inspect machine
for any damage and repair, if needed.
3. Before cleaning, repairing, or inspecting, stop the
engine and make certain the impeller and all
moving parts have stopped. Disconnect spark plug
wire and keep away from spark plug to prevent
unintended starting.
4. Do not change the engine governor settings or
overspeed the engine. The governor controls the
maximum safe operating speed of the engine.
5. Maintain or replace safety and instruction labels, as
necessary.
6. Follow this manual for safe loading, unloading,
transporting, and storage of this machine.
7. Never store the machine or fuel container inside
where there is an open flame, spark or pilot ligh t
such as a water heater, furnace, clothes dryer, etc.
8. Always refer to the operator’s manual for proper
instructions on off-season storage.
9. If the fuel tank has to be drained, do this outdoors.
10. Observe proper disposal laws and regulations for
gas, oil, etc. to protect the environment.
WARNING: - YOUR RESPONSIBILITY: Restrict the use of this power machine to persons who read,
understand and follow the warnings and instructions in this ma nual and on the machine.
4
Look For Relevant Emissions Durability Period and
Air Index Information On Your Engine Emissions Label
Engines that are certified to meet the California Air Resources Board (CARB) Tier 2 Emission Sta ndards must
display information regarding the Emission s Durability Period and the Air Index. Sears, Roebuck and Co., U.S.A.
makes this information available to the consumer on our emission labels.
The Emissions Durability Period describes the number of hours of actual running time for which the engine is certified to
be emissions compliant, assuming proper maintenance in accordance with the Operating & Maintenance Instructions.
The following categories are used:
Moderate:Engine is certified to be emission compliant for 125 hours of actual engine running time.
Intermediate:Engine is certified to be emission compliant for 250 hours of actual engine running time.
Extended:Engine is certified to be emission compliant for 500 hours of actual engine running time.
For example, a typical walk-behind lawn mower is used 20 to 25 hours per year. Therefore, the Emissions Durability
Period of an engine with an intermediate rating would equate to 10 to 12 years.
The Air Index is a calculated number describing the relative level of emissions for a specific engine family. The lower the
Air Index, the cleaner the engine. This information is displayed in graphical form on the emissions label.
After July 1, 2000, Look For Emissions Compliance Period On
Engine Emissions Compliance Label
After July 1, 2000 certain Sears, Roebuck and Co., U.S.A. engines will be certified to meet the United States
Environmental Protection Agency (USEPA) Phase 2 emission standards. For Phase 2 certified engines, the Emissions
Compliance Period referred to on the Emissions Compliance label indicates the number of operating hours for which the
engine has been shown to meet Federal emission requirements. For engines less than 225 cc displacement, Category C
= 125 hours, B = 250 hours and A = 500 hours. For engines of 225 cc or more, Category C = 250 hours, B = 500 hours and
A = 1000 hours.
The displacement engines of Model Series 120000 is 206 cc.
This is a generic representation of the emission label typically found on a certified engine.
5
ASSEMBLY
IMPORTANT:
oil in the engine. After assembly, see OPERATION
section of this manual for proper fuel and engine o il fillup.
This Chipper Shredder has been completely assembled
at the factory, except for the debris collection bag,
which is stowed in the chipper chute for shipping.
This unit is shipped without gasoline or
Removing Unit From Carton
• Remove staples, break glue on top flaps or cut tape
at carton end and peel along top flap to open
carton.
• Remove any loose parts.
• Cut down along carton edges and lay carton down
flat.
• Remove packing material. Lift unit from the rear
and discard bottom pad. Roll unit out of carton.
Check carton thoroughly for loose parts.
Loose Parts In Carton (See Figure 1)
• One Tamper
• One Debris Collection Bag (Not Shown)
• One Pair of Safety Glasses (Not Shown)
• One 20-oz. Bottle of Engine Oil
• One Operator’s Manual
• Pull the spring latch upward and gently pivot the
chipper chute down until it clicks into the lock rod.
See Figure 2.
1.
Spring Latch
2.
Lock Rod
Figure 2
Raising the Chipper Chute
WARNING: Ne ver o perate the chipper
shredder without chipper chute lowere d into
the operating position.
20-oz. Bottle
of Engine Oil
Tamper
Figure 1
Lowering the Chipper Chute
WARNING: Never operate the chipp er
shredder without chipper chute lowered into
the operating position.
For shipping reasons, the unit is cartoned with its
chipper chute in a raised position. To pivot it downward,
into the operating position, proceed as follows:
For convenience when storing, the chipper chute can
be pivoted upward. To do so, proceed as follows:
• Pull the lock rod outward and pivot the chipper
chute upward until it clicks into the spring latch. See
Figure 3.
2.
Spring Latch
1.
Lock Rod
Figure 3
6
Attaching The Debris Collection Bag
• To attach the bag, place the opening of the bag
completely over the chute deflector.
• Position the bag so that the wing knobs which
secure the chute deflector to the housing are
completely covered.
• Pull on the drawstrap until the bag is tight around
chute deflector. See Figure 4.
Housing
Emptying the Debris Collection Bag
• Squeeze the locking buckle to release the bag’s
drawstrap before loosening it from the chute
deflector. See Figure 5
• Empty the bag and reattach to the chute deflector
opening. Refer to Figure 4.
Locking Buckle
Debris Collection Bag
Figure 4
Figure 5
7
OPERATION
Know Your Chipper Shredder
WEAR Y OU R
SAFETY GLASSES
FORESIGHT IS BETTER
THAN NO SIGHT
Handle
Tamper
Read this operator’s manual and safety rules before operating your Chipper Shredder.
Compare the illustrations below with your equipment 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 o bjects being thrown into the
eyes, which can result in severe eye damage. Always wear s afety glasses, provided with
the Chipper Shredder, while operating this equipment or while performing any adjustments
or repairs on it.
Hopper
Spring Latch
Chute Deflector
Spark Plug Wire
Air
Cleaner
Choke
Control
Starter Handle
Oil Fill /
Dipstick
Fuel Fill
Fuel Tank
Throttle
Lever
Oil Drain
Chipper Chute
Lock Rod
Reduction Chamber
Engine
Figure 6
Operating Controls (See Figure 6)
Spring Latch
The spring latch is located on the top of the hopper. It is
used to secure the chipper chute in a raised position for
storage or for transporting.
Handle
Use the handle when transporting the chipper
shredder.
Lock Rod
The lock rod is located on the chipper chute sup port. It
is used to release or lock the chipper chute in a lowered
position for operation.
WARNING: Never operate the chipper
shredder with the chipper chute in the raised
position. Release the spring latch to lower the
chipper chute into the operating position
before starting the engine.
Chipper Chute
Branches up to 3” in diameter may be fed into th e
chipper chute for chipping.
Meets ANSI safety standards
Craftsman Chipper Shredders conform to the safety standard of the American National Sta ndards Institute (ANSI).
Muffler
8
Tamper
Use the tamper to assist in feeding branches into the
chipper chute.
Hopper
Leaves, twigs and branches up to 1/2-inch in
diameter may be placed into the hopper for shredding.
IMPORTANT: Never place branches with a diameter
greater than 1/2-inch in the hopper. Doing so can result
in serious damage to your unit’s shredder blade, flails
or impeller.
Engine
NOTE: In the s tate of California, the 11 0000 series
engines covered in this manual are certified by th e
California Air Resources Board to meet emissions
standards for 250 hours. Such certification does not
grant the purchaser, owner or operator of this engine
any additional warranties with respect to the
performance or operational life of this engine. This
engine is warranted solely according to the product and
emissions warranties stated elsewhere in this manual.
Bore 2-11/16 in. (68 mm)
Stroke 2-13/64 in. (56 mm)
Displacement 12.48 cu. in.(206 cc)
IMPORTANT: For practical operation, the horsepower
loading should not exceed 85% of rated horsepower.
Engine power will decrease 3-1/2% for each 1,000 feet
(300 meters) above sea level and 1% for each 10° F
(5.6° C) above 77° F (25° C). Engine will operate
satisfactorily at an angle up to 15 degrees.
Throttle Lever
The throttle lever controls the engine speed and stop
function.
Choke Control
The choke control closes the choke plate on the
carburetor and aids in starting a cold engine.
Starter Handle
The starter handle is located on the engine. Pull the
starter handle to start engine.
Stopping Engine
• Move throttle control lever to STOP position. See
Figure 7.
WARNING: When moving throttle control
lever, be careful of heated surfaces on muffler
guard.
CAUTION: Never stop the engine by
moving the choke lever into the CHOKE
position. Backfire, fire or engine damage
could result.
Gas And Oil Fill-up
Oil (one 20-oz. bottle included)
IMPORTANT: The chipper shredder is shipped without
oil in the engine.
Type of Oil
1. Refer to the chart below for proper grade of oil.
2. Use a high quality detergent oil classified “For
service SF, SG,SH, SJ” or higher.
3. Do not use special additives.
Synthetic oil meeting ILSAC GF-2, API certification and
API service symbol with “SJ/CF Energy Conserving” or
higher is an acceptable oil at all temperatures. Use of
synthetic oil does not alter required oil change interv als.
SAE Viscosity Grades
30
5W-30, 10W-30
Synthetic 5W-30, 10W-30
°F -20° 0° 20° 40° 60° 80° 100°
Starting temperature range anti cipated befo re next oil ch ange
* CAUTION: Air cooled engines run hotter than automotive
engines. The use of non-synthetic multi-visc osity oils (5W30, 10W-30 etc.) in temperatures abov e 40°F will result in
higher than normal oil consumption. When using a multiviscosity oil, check oil leve l more frequently .
** CAUTION: SAE 30 oil, if used below 40°F, will result in
hard starting and possible engin e bore damage due to
inadequate lubrication.
• Remove oil fill dipstick.
• With the Chipper Shredder on level ground, use a
funnel to fill engine with oil to FULL mark on
dipstick. Capacity is 20 oz. (0.6 liter). Be care ful
not to overfill. Overfilling will cause the engine to
smoke profusely and will result in poor engine
performance. T he oil bottle packaged with your
Chipper Shredder contains 20 oz. of oil.
• Before operating the chipper shredder, check the
oil level as follows:
• Wipe the dipstick with a clean cloth and reinsert it in
the oil fill tube.
Figure 7
9
• Tighten the dipstick before removing it and check
the oil fill level. See Figure 8.
Full
Figure 8
• 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 section for
additional information.
WARNING: Use extreme c are when
handling gasoline. Gasoline is extremely
flammable and the vapors are explosive.
Never fuel machine indoors or while the
engine is hot or running. Extinguish
cigarettes, cigars, pipes, and other sources of
ignition.
NOTE: Do not allow the dips tick to rub along the inside
walls of the oil fill tube when removing it. Doing so may
result in a false dipstick reading.
• Check oil level three times prior to starting engine to
be certain you’ve gotten an accurate dipstick
reading.
IMPORTANT: Running the engine with too little oil can
result in permanent engine damage.
Gasoline
Type of Fuel
• Use clean, fresh, regular unleaded gasoline with a
minimum of 85 octane. Fresh fuel prevents gum
from forming in the fuel system or on essential
carburetor parts. Purchase fuel in quantity that can
be used within 30 days.
• Do not use gasoline which contains Methanol.
• Do not mix oil with gasoline.
• Your chipper shredder’s engine is certified to
operate on gasoline. Exhaust Emission Control
System: EM (Engine Modifications).
NOTE: Some fuels, called oxy genated or reformulated
gasoline, are gasoline blended with alcohols or ethers.
Excessive amounts of these blends can damage th e
fuel system or cause performance problems. If any
undesirable operating symptoms occur, use gasoline
with a lower percentage of alcohol or ether.
Check the fuel level periodically to avoid running out of
gasoline while operating the chipper shredder. If the
unit runs out of gas while operating, it may be
necessary to unclog the unit before it can be restarted.
Refer to SERVICE AND ADJUSTMENT section.
Starting Engine
WARNING: The muffler and surrou nding
area will be hot if the engine has been
running. Use caution and protect your hands if
working near the muffler.
• If not already attached, attach spark plug wire to
spark plug. Make certain the rubber boot on the end
of the spark plug is snapped securely over the
metal tip on the spark plug. Refer to Figure 9 for
spark plug wire location.
Spark Plug Wire
Fuel Fill-up
• Remove fuel cap from the fuel tank.
• 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 its container.
Gasoline that has been sitting for any period longer
than four weeks is considered stale.
• The fuel tank has a capacity of three (3) quarts. Fill
fuel tank with clean, fresh, unleaded regular,
unleaded premium or reformulated automotive
gasoline only.
• Replace fuel cap.
Figure 9
10
• Move choke lever to CHOKE position. (A warm
engine may not require choking). See Figure 10.
Figure 10
• Move throttle control lever to FAST (rabbit) position.
See Figure 11.
Figure 11
• Grasp the starter handle and pull the rope out
slowly until resistance is felt. When it becomes
slightly harder to pull the rope, slowly allow the rope
to recoil. Then pull rope with a rapid, continuous,
full arm stroke. Keep a firm grip on starter handle.
• Repeat the previous steps until engine starts. When
engine starts, move choke control gradually toward
the RUN position until the engine is running
smoothly.
NOTE: A “clanky” noise may be heard when pulling
the starter rope. It is completely normal and does NOT
indicate a malfunction of any kind. The noise is caused
by the flails (part of the shredding mechanism) pivoting
on the chipper shredder’s impeller as it rotates.
• Avoid shredding fibrous plants such as tomato
vines until they are thoroughly dried out. Fresh
vines do not shred well and tend to wrap
themselves around the impeller and flails.
• Place reasonable amounts of debris into the hopper
at a time. Do not overload the hopper.
• Allow the material in the hopper to be drawn into the
blades and shredded before adding additional
debris to the hopper. Failure to due so may result in
a clogged hopper, clogged chute deflector or a
stalled engine.
• Avoid placing twigs longer than 24 inches into the
hopper. Twigs longer than 24 inches may result in a
clogged hopper.
IMPORTANT: Never place branches with a diameter
greater than 1/2-inch in the hopper. Doing so can result
in serious damage to your unit’s shredder blade, flails or
impeller.
Clearing the Hopper
Should the hopper become clogged with debris during
operation, proceed as follows:
• Grasp the handle with both hands and gently
agitate the chipper shredder to help loosen debris,
drawing it into the impeller.
If the clog does not clear, proceed as follows:
• Stop engine.
• Use your hands to remove any debris found near
the top of the hopper.
• Use a branch (or other available device, i.e.
broomstick) to dislodge debris located toward the
base of the hopper.
• Restart engine.
NOTE: If you’re unable to pull the starter rope as a
result of accumulated debris near the impeller, fo llow
instructions under the heading Cleaning the
Reduction Chamber.
• Allow the rope to recoil slowly.
WARNING: Never run the engine indoors
or in a poorly ventilated area. Engine exhaust
contains carbon monoxide, an odorless and
deadly gas.
Shredding
Yard waste such as leaves and pine needles can be
placed in the hopper for shredding. After material has
been processed by the shredder blade and flails, it will
be forced out of the chute deflector, and, if attached,
into a debris collection bag. Observe the following
guidelines when shredding yard debris:
• Never attempt to shred material other than normal
yard debris (leaves, twigs, pine cones, etc.).
11
Chipping
WARNING: Never operate the chipp er
shredder without chipper chute lowered into
the operating position.
Branches up to 3” in diameter can be fed into the
chipper chute. See Figure 6.Observe the following
guidelines when chipping branches:
• Keep both hands firmly on the branch as you feed it
into the chipper chute.
• Never feed more than one branch into the chipper
chute at a time.
• Never feed anything other than branches (or wood)
into the chipper chute.
• Use the tamper to assist in feeding branches into
the chipper chute.
• Apply intermittent pressure (force, in short pulses)
while feeding larger (2- 3-inch diameter) branches
into the chipper chute, to avoid bogging or stalling
the engine.
IMPORTANT: Never feed branches with a diameter
greater than three (3) inches into the chipper chute.
Doing so can result in serious damage to your unit’s
chipper blades, flails or impeller.
• Disconnect spark plug wire and keep away from
spark plug. Refer to Page 15.
WARNING: The muffler and surrou nding
area will be hot if the engine has been
running. Use caution and protect your hands if
working near the muffler.
• Remove the two wing knobs on either side of the
chute deflector and pivot the chute deflector
upward. See Figure 12.
• Remove the hairpin clip from the clevis pin which
extends through the housing and shredder screen.
See Figure 12. Retain the clevis pin and hairpin
clip.
Chute
Deflector
Shredder
Hairpin
Clip
Screen
Housing
NOTE: For best performance, always operate the unit
with sharp chipper blades. If a noticeable loss in
performance is encountered while chipping branches,
the chipper blades should be replaced.
Cleaning the Reduction Chamber
WARNING: The impeller’s shredder blade
and chipper blades are sharp. Wear leather
work gloves to protect your hands when
cleaning out the reduction chamber.
If the reduction chamber becomes clogged with debris,
the shredder screen can be pivoted upward so that you
can clean the surrounding area. To do so, proceed as
follows:
• Stop the engine and wait until all moving parts have
come to a complete stop.
Clevis
Pin
Wing Knobs
Reduction
Chamber
Figure 12
• Pivot the shredder screen upward and clean the
surrounding area by scraping away debris.
• Confirm that the spark plug wire is disconnected
and away from spark plug.
• Pull on the starter rope two-to-three times to purge
any remaining debris from the reduction chamber
• When the area is cleaned, pivot the shre dder
screen downward and re-secure with the clevis pin
and hairpin clip removed earlier.
• Reattach the debris collection bag to the chute
deflector, if desired.
12
Customer Responsibilities
MAINTENANCE
SCHEDULE
Lube Spring Latch
T
Lube Chipper Chute Hinge
C
U
Lube Chute Deflector
D
O
R
Inspect Chipper Blades
P
Inspect Shredder Blade
Check Oil Level
E
Change Oil
N
I
G
N
Clean Air Filter Precleaner
E
Clean Engine
Check Spark Plug
MAINTENANCE
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SERVICE
DATES
Lubrication
Spring Latch: Lubricate the latch with light oil once a
season
Chipper Chute Hinge: Lubricate the hinge with light oil
once a season.
Chute Deflector: Lubricate the pivot points on the
chute deflector with light oil once a season.
Engine: Check engine oil level before each use as
follows:
• Remove the dipstick and wipe with a clean cloth.
Full
Figure 13
• Replace and tighten dipstick.
• Remove and check the oil fill level. Add oil if
necessary (Refer to Page 9 for proper oil type).
Air Cleaner
Clean air cleaner’s precleaner every 25 hours under
normal conditions. To remove air cleaner, proceed as
follows:
• Remove knob and cover. See Figure 14.
Knob
Cover
Air Cleaner
Cartridge
Pre-cleaner
Stud
Base
13
Figure 14
• Lift air cleaner assembly (air cleaner cartridge and
precleaner) off stud.
• Push clean (or new) air cleaner assembly onto
stud. Air cleaner must fit securely on base.
• Push cover squarely onto base and tighten knob.
NOTE: Clean pre-c leaner every few hours under
extremely dusty conditions. To clean pre-cleaner,
separate it from cartridge and wash in liquid detergent
and water. Air dry thoroughly. Do not oil pre-cleaner.
Re-assemble dry pre-cleaner onto clean
cartridge.Replace the air cleaner cartridge once a
season.
IMPORTANT: Do not use pressurized air or solvents to
clean cartridge. Pressurized air can damage cartridge.
Solvents will dissolve cartridge.
Cleaning Engine
• Promptly wipe off any fuel or oil spilled on the
machine with clean cloth.
• Using a brush or cloth, remove debris from the
finger guard on the engine daily to prevent
overheating of the engine. Do not use water to
clean engine parts. Water could contaminate the
fuel system.
• Keep the throttle linkage, springs and controls free
of debris.
• Clean muffler area and remove any debris before
operating the unit.
Spark Plug
• Clean area around the spark plug base.
• Remove and inspect the spark plug.
• Replace the spark plug if electrodes are pitted,
burned, or the porcelain is cracked. See Figure 15.
• Clean the spark plug and reset the gap to.030" at
least once a season or every 100 hours of
operation. See Figure 15. Replace if necessary.
Refer to parts list section for part number.
NOTE: Do not sandblas t spark plug. Spark plug should
be cleaned by scraping or wire brushing and washing
with a commercial solvent.
Changing Oil
To drain oil from the engine’s crankcase, proceed as
follows:
• Run the engine for a few minutes to allow the oil to
warm up. Warm oil flows more easily and will carry
away more impurities when draining oil.
• Position the chipper shredder on level surface and
place an appropriate receptacle with a capacity of
at least one quart beneath the oil drain tube. See
Figure 16.
Oil Dipstick
Oil Drain Tube
Figure 16
• Remove the oil dipstick.
• Use a 3/8” wrench to unthread the oil plug from the
drain tube, allowing the used oil to flow out.
• Replace the oil plug and add 20 oz. of new oil
(Refer to Page 9 for proper oil type). Do NOT
overfill.
• Replace dipstick and check oil level (Refer to Page
9).
.030” (0.76 mm)
Figure 15
14
SERVICE AND ADJUSTMENTS
WARNING: Always stop engine,
disconnect spark plug wire and keep away
from spark plug, before performing any
service or adjustments on your machine.
Disconnecting Spark Plug
Chipper Blade
Lock Washer & Nut
WARNING:
area will be hot if the engine has been
running. Use caution and protect your hands if
working near the muffler.
Locate the spark plug wire between the muffler and air
cleaner. See Figure 17.
Muffler
Air Cleaner
Disconnect the spark plug wire by gently pulling the
rubber boot from the spark plug. Keep the wire away
from spark plug while servicing your chipper shred der
to prevent accidental starting of the engine.
The muffler and surrounding
Spark Plug Wire
Figure 17
Replacing the Chipper Blades
WARNING: The impeller’s chipper blades
are sharp. Wear leather work gloves to
protect your hands.
• Stop the engine and make certain the chipper
shredder has come to a complete stop.
• Disconnect spark plug wire and keep away from
spark plug.
• Pivot the shredder screen upward as instructed
under the heading Cleaning the Reduction
Chamber.
• Remove the chipper chute support brace from the
frame by removing the two hex bolts and saddle
washers which secure it. See Figure 18.
Support Brace
Impeller
Hex Bolts &
Saddle Washers
Figure 18
• Remove the chipper chute by removing three hex
nuts and washers which secure it to the impeller
housing. See Figure 18.
• Rotate the impeller by hand until one of the two
chipper blades is visible through the impeller
housing opening.
• Remove the blade by removing the internal hex
screws, lock washers and hex nuts which secure it
to the impeller. Retain the hardware.
NOTE: Use a 3/16” hex key (Allen) wrench on the
outside of the blade and a 1/2” box (or socket) wrench
on the inside of the impeller. See Figure 18. Hold the
Allen wrench stationary and rotate the box (or socket)
wrench to loosen the nut.
• Install a replacement blade (Part No. 742-0544)
with the hardware removed earlier.
IMPORTANT: Make certain blades are reassembled with
the sharp edge outward (toward the chipper chute).
Torque hardware to between 20 ft.-lbs and 25 ft.-lbs.
• To replace the other blade, rotate the impeller to
expose the second blade and repeat the steps
above.
Internal
Hex Screw
Replacing the Shredder Blade
WARNING: The impeller’s chipper blade s
are sharp. Wear leather work gloves to
protect your hands.
• Stop the engine and make certain that all moving
parts have come to a complete stop.
15
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