MTD 24A-463B516 User manual

PRINTED IN U.S.A. MTD Products Ltd., P. O. Box 1386, KITCHENER, ONTARIO N2G 4J1
OPERATOR’S MANUAL
IMPORTANT:
READ SAFETY RULES AND INSTRUCTIONS
CAREFULLY BEFORE OPERATING EQUIPMENT.
Safety • Setup • Operation • Maintenance • Troubleshooting • Parts Lists • Warranty
10/3/07
772C0505F
Chipper Shredder — Model Series 450 and 460
Model 464 Shown.

2
Table of Contents
This Operator’s Manual is an important part of your new equipment. It will help you assemble,
prepare and maintain the unit for best performance. Please read and understand what it says.
Customer Support.............................................. 2
Safety Labels ...................................................... 3
Safe Operation Practices................................... 4
Setting Up Your Chipper-Shredder.................... 6
Operating Your Chipper-Shredder..................... 8
Maintaining Your Chipper-Shredder ............... 12
Trouble Shooting .............................................. 14
Warranty ............................................................ 15
Illustrated Parts Lists....................................... 18
Finding and Recording Model Number
BEFORE YOU START ASSEMBLING
YOUR NEW EQUIPMENT,
please locate the model plate on the equipment and copy the
model number and the serial number to the sample model
plate provided to the right. You can locate the model plate by
standing at the operating position and looking down at the rear
of the machine.
Please do
NOT return the unit to the retailer from which it was purchased,
without first contacting Customer Support.
Customer Support
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit,
you can seek help from the experts. Choose from the options below:
1. Visit www.mtdcanada.ca for many useful suggestions, click on Customer Support button.
2. Call a Customer Support Representative at 1-800-668-1238.
3. The engine manufacturer is responsible for all engine-related issues in terms of performance, power-rating, specifications,
warranty, and service. Depending on the engine manufacturer, more information is included in this publication or packed
separately with this product.
Please have your unit’s model number and serial number ready when you call. See previous section to locate this information.
You will be asked to enter the serial number in order to process your call.
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3
1
Safety
Labels
WARNING
DO NOT remove safety
(or any) labels from
chipper shredder for
any reason.
Safety Labels Found On Your Chipper-Shredder
>12mm
S30186
>76mm
S30039

4
2
Safe
Operation
Practices
Training
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.
Be familiar with all controls and their proper operation.
Know how to stop the machine and disengage them
quickly.
Never allow children under 16 years of age to operate
this machine. Children 16 and over should read and
understand the instructions and safe operation practices
in this manual and on the machine and be trained and
supervised by an adult.
Never allow adults to operate this machine without proper
instruction.
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.
Never run an engine indoors or in a poorly ventilated area.
Engine exhaust contains carbon monoxide, an odorless
and deadly gas.
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.
Never attempt to unclog either the feed intake 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 the spark plug wire and ground
it against the engine.
Preparation
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.
Always wear safety glasses or safety goggles during
operation and while performing an adjustment or repair,
to protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes.
Wear sturdy, rough-soled work shoes and close-fitting
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.
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.
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
4.
Maintain or replace safety and instructions labels, as
necessary.
Safe Handling of Gasoline:
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.
Use only an approved gasoline container.
Never fill containers inside a vehicle or on a truck or
trailer bed with a plastic liner. Always place containers
on the ground away from your vehicle before filling.
When practical, remove gas-powered equipment from
the truck or trailer and refuel it on the ground. If this is
not possible, then refuel such equipment on a trailer
with a portable container, rather than from a gasoline
dispenser nozzle.
Keep the nozzle in contact with the rim of the fuel
tank or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
Never fuel machine indoors.
Never remove gas cap or add fuel while the engine is
hot or running. Allow engine to cool at least two minutes
before refueling.
Never over fill fuel tank. Fill tank to no more than ½
inch below bottom of filler neck to allow space for fuel
expansion.
Replace gasoline cap and tighten securely.
If gasoline is spilled, wipe it off the engine and
equipment. Move unit to another area. Wait 5 minutes
before starting the engine.
To reduce fire hazards, keep machine free of grass,
leaves, or other debris build-up. Clean up oil or fuel
spillage and remove any fuel soaked debris.
Never store the machine or fuel container inside where
there is an open flame, spark or pilot light as on a water
heater, space heater, furnace, clothes dryer or other
gas appliances.
Operation
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.
Before starting the machine, make sure the chipper chute,
feed intake, and cutting chamber are empty and free of all
debris.
5.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
1.
2.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or
emit chemicals known to State of California to cause cancer and birth defects or other reproduc-
tive harm.
WARNING
This symbol points
out important safety
instructions which, if
not followed, could
endanger the personal
safety and/or property
of yourself and others.
Read and follow all
instructions in this
manual before at-
tempting to operate
this machine. Failure
to comply with these
instructions may result
in personal injury. When
you see this symbol,
HEED ITS WARNING!
Your Responsibility
Restrict the use
of this power machine
to persons who read,
understand
and follow the warnings
and instructions
in this manual
and on the machine.
DANGER: This machine was built to be operated according to the rules for safe operation in this 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 injury or death.

5
Thoroughly inspect all material to be shredded and remove
any metal, rocks, bottles, cans, or other foreign objects
which could cause personal injury or damage to the
machine.
If it becomes necessary to push material through the
shredder hopper, use a small diameter stick. Do not use
your hands or feet.
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. Disconnect the spark plug wire, ground
it against the engine and perform the following steps:
Inspect for damage.
Repair or replace any damaged parts.
Check for any loose parts and tighten to assure
continued safe operation.
Do not allow an accumulation of processed material to build
up in the discharge area. This can prevent proper discharge
and result in kickback of material through the feed opening.
Do not attempt to shred or chip material larger than
specified on the machine or in this manual. Personal injury
or machine damage could result.
Never attempt to unclog either the feed intake or discharge
opening while the engine is running. Shut the engine off,
wait until all moving parts have stopped, disconnect the
spark plug wire and ground it against the engine before
clearing debris.
Never operate without the shredder hopper, chipper chute,
or chute deflector properly attached to the machine. Never
empty or change discharge bag while the engine is running.
Keep all guards, deflectors and safety devices in place and
operating properly.
Keep your face and body back and to the side of the chipper
chute while feeding material into the machine to avoid
accidental kickback injuries.
Never operate this machine without good visibility or light.
Do not operate this machine on a paved, gravel or non-level
surface.
Do not operate this machine while under the influence of
alcohol or drugs.
Muffler and engine become hot and can cause a burn. Do
not touch.
Never pick up or carry machine while the engine is running.
If situations occur which are not covered in this manual, use
care and good judgement. Contact Customer Support for
assistance and the name of the nearest service dealer.
3.
4.
5.
a.
b.
c.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Maintenance & Storage
Never tamper with safety devices. Check their proper
operation regularly.
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.
Before cleaning, repairing, or inspecting, stop the engine
and make certain the impeller and all moving parts have
stopped. Disconnect the spark plug wire and ground it
against the engine to prevent unintended starting.
Do not change the engine governor settings or overspeed
the engine. The governor controls the maximum safe
operating speed of the engine.
Maintain or replace safety and instruction labels, as
necessary.
Follow this manual for safe loading, unloading,
transporting, and storage of this machine.
Never store the machine or fuel container inside where
there is an open flame, spark or pilot light such as a water
heater, furnace, clothes dryer, etc.
Always refer to the operator’s manual for proper
instructions on off-season storage.
If the fuel tank has to be drained, do this outdoors.
Observe proper disposal laws and regulations for gas, oil,
etc. to protect the environment.
Do not modify engine
To avoid serious injury or death, do not modify engine in
any way. Tampering with the governor setting can lead to a
runaway engine and cause it to operate at unsafe speeds.
Never tamper with factory setting of engine governor.
Notice Regarding Emissions
Engines which are certified to comply with California and
federal EPA emission regulations for SORE (Small Off Road
Equipment) are certified to operate on regular unleaded
gasoline, and may include the following emission control
systems: Engine Modification (EM) and Three Way Catalyst
(TWC) if so equipped.
Average Useful Life
According to the Consumer Products Safety Commission
(CPSC) and the U.S. Environmental Protection Agency (EPA),
this product has an Average Useful Life of seven (7) years, or
60 hours of operation. At the end of the Average Useful Life,
buy a new machine or have the machine inspected annually
by an authorized service dealer to ensure that all mechani-
cal and safety systems are working properly and not worn
excessively. Failure to do so can result in accidents, injuries
or death.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
2
Safe
Operation
Practices
WARNING
This symbol points
out important safety
instructions which, if
not followed, could
endanger the personal
safety and/or property
of yourself and others.
Read and follow all
instructions in this
manual before at-
tempting to operate
this machine. Failure
to comply with these
instructions may result
in personal injury. When
you see this symbol,
HEED ITS WARNING!
Your Responsibility
Restrict the use
of this power machine
to persons who read,
understand
and follow the warnings
and instructions
in this manual
and on the machine.

6
3
Setting Up
Your Chipper
Shredder
IMPORTANT: This unit is shipped WITHOUT GASOLINE
OR OIL in the engine. Be certain to service engine with
gasoline and oil as instructed in the separate engine
manual before operating your machine.
Loose Parts In Carton
a. Hopper Assembly d. Bag
b. Chute Deflector e. Safety Glasses
c. Chipper Chute f. Engine Oil
Attaching The Hopper
Assembly
1. a. Remove six hex nuts and washers from the weld
studs on the impeller housing. Do not remove the
support plate. See Figure 3-1.
b. Place hopper assembly into position in front of
impeller housing, aligning holes in hopper assembly
collar with weld studs.
c. Slide hopper assembly onto weld studs and replace
washers and hex nuts. Do not tighten completely.
2. a. Lift hopper assembly up to impeller bracket
assembly.
b. Slide the release rod out slightly to hook the hopper
bracket onto the rod. See Figure 3-2.
c. Tighten the six hex nuts that secure hopper
assembly to impeller housing and also tighten the
hex nuts that secure hopper bracket to hopper
assembly.
Figure 3-3
Figure 3-2
NOTE: All references
in this manual to the
left or right side of
the chipper shredder
is from the operating
position only. Excep-
tions, if any, will be
specified.
Figure 3-1
IMPORTANT
This unit is shipped
WITHOUT GASOLINE
OR OIL in the engine.
Be certain to service
engine with gasoline
and oil as instructed
in the separate engine
manual before operat-
ing your machine.
NOTE: This Operators
Manual covers a range
of product specifica-
tions for various
models. Characteristics
and features discussed
and/or illustrated in this
manual may not be ap-
plicable to all models.
MTD reserves the right
to change product
specifications, designs
and equipment without
notice and without
incurring obligation.
A
B
C
A
B
A
A
B
B

7
Fgure 3-5
3
Figure 3-6
Attaching The Chute Deflector
3. a. Remove the wing knobs from each side of the lower
impeller housing.
b. Remove the hex lock nut, spacers, and hex bolt from
the top of the impeller housing. See Figure 3-3.
4. a. Align the chute deflector in position on the
discharge opening and insert hex bolt with spacer
through hinge on chute deflector (spacers fit inside
of hinges). See Figure 3-4.
b. Place second spacer over hex bolt inside other
hinge and secure with hex lock nut.
c. Secure both sides of chute deflector to impeller
housing using wing knobs previously removed.
Attaching The Chipper Chute
(Model Series 460)
5. a. Remove the three cupped washers and hex nuts
from weld studs around the opening on the side of
the impeller housing. See Figure 3-5.
b. Remove the hex bolts, flat washers, and lock nuts
from the two holes on the upper end of the support
brace.
6. a. Align the chipper chute over the weld studs, so the
slot in the bottom of the chute is facing down.
b. Secure chipper chute with the three cupped
washers (cupped side against the chipper chute)
and hex nuts previously removed. Do not tighten
the nuts at this time. See Figure 3-6.
Figure 3-4
Setting Up
Your Chipper
Shredder
NOTE: All references
in this manual to the
left or right side of
the chipper shredder
is from the operating
position only. Excep-
tions, if any, will be
specified.
IMPORTANT
This unit is shipped
WITHOUT GASOLINE
OR OIL in the engine.
Be certain to service
engine with gasoline
and oil as instructed
in the separate engine
manual before operat-
ing your machine.
NOTE: This Operators
Manual covers a range
of product specifica-
tions for various
models. Characteristics
and features discussed
and/or illustrated in this
manual may not be ap-
plicable to all models.
MTD reserves the right
to change product
specifications, designs
and equipment without
notice and without
incurring obligation.
A
B
C
A
B
A
B

8
3
Setting Up
Your Chipper
Shredder
7. The chipper shredder was shipped with one end of
the support brace already secured to the lower frame.
Loosen but do not remove the bolts securing the brace
to the frame. See Figure 3-7.
a. Align the holes in the chute with the holes in the top
of the brace and attach brace to chipper chute with
hardware previously removed. Tighten securely.
b. Tighten the bolts securing the support brace to the
frame.
c. Tighten the three nuts on the weld studs holding
the chipper chute to the impeller housing.
Attaching The Chipper Chute
(Model Series 450)
8. a. Remove the three cupped washers and hex nuts
from weld studs around the opening on the side of
the impeller housing. See Figure 3-8.
Figure 3-7
A
B
C
Figure 3-8
NOTE: All references
in this manual to the
left or right side of
the chipper shredder
is from the operating
position only. Excep-
tions, if any, will be
specified.
IMPORTANT
This unit is shipped
WITHOUT GASOLINE
OR OIL in the engine.
Be certain to service
engine with gasoline
and oil as instructed
in the separate engine
manual before operat-
ing your machine.
NOTE: This Operators
Manual covers a range
of product specifica-
tions for various
models. Characteristics
and features discussed
and/or illustrated in this
manual may not be ap-
plicable to all models.
MTD reserves the right
to change product
specifications, designs
and equipment without
notice and without
incurring obligation.

9
3
Setting Up
Your Chipper
Shredder
Figure 3-10
A
BC
Figure 3-9
NOTE: All references
in this manual to the
left or right side of
the chipper shredder
is from the operating
position only. Excep-
tions, if any, will be
specified.
IMPORTANT
This unit is shipped
WITHOUT GASOLINE
OR OIL in the engine.
Be certain to service
engine with gasoline
and oil as instructed
in the separate engine
manual before operat-
ing your machine.
NOTE: This Operators
Manual covers a range
of product specifica-
tions for various
models. Characteristics
and features discussed
and/or illustrated in this
manual may not be ap-
plicable to all models.
MTD reserves the right
to change product
specifications, designs
and equipment without
notice and without
incurring obligation.
9. a. Align the chipper chute over the weld studs, so the
slot in the bottom of the chute is facing down.
b. Secure chipper chute with the three cupped
washers (cupped side against the chipper chute)
and hex nuts previously removed. Tighten the nuts
at this time. See Figure 3-9.
Attaching The Bag
10.To attach the bag:
a. Place the opening of the bag completely over the
chute deflector.
b. Pull on the drawstring until the bag is tight around
chute deflector opening.
c. Clip drawstring back on itself, tight against chute
deflector to secure into position. See Figure 3-10.

10
4
Operating
Your Chipper
Shredder
Chipper Chute
Allows twigs and small branches up to 3” (2” for Model
Series 450) in diameter to be fed into the impeller for
chipping. See Figure 4-1.
Hopper Assembly
Allow leaves and small branches up to 1/2 diameter
to be fed into the impeller for chipping and shredding.
Material can be raked into hopper assembly by lowering
the hopper assembly. See Figure 4-1.
Release Rod
The release rod is located on the impeller bracket
assembly and it is used to release or lock the hopper
when raising or lowering. See Figure 4-1.
Gas and Oil Fill-Up
Service the engine with gasoline and oil as instructed in
the engine manual. See Engine Manual for location of
gas fill.
WARNING: Use extreme care when han-
dling gasoline. Gasoline is extremely
flammable and the vapors are explosive.
Never fuel the machine indoors or while
the engine is hot or running. Extinguish
cigarettes, cigars, pipes and other
sources of ignition.
WARNING: The operation of any
chipper shredder can result in foreign
objects being thrown into the eyes,
which can damage your eyes se-
verely. Always wear the safety glasses
provided with this unit or eye shields
before chipping or shredding and while
performing any adjustments or repairs.
WARNING
The operation of any
chipper shredder
can result in foreign
objects being thrown
into the eyes, which
can damage your
eyes severely. Always
wear the safety
glasses provided
with this unit or eye
shields before chip-
ping or shredding
and while performing
any adjustments or
repairs.
Use extreme care
when handling
gasoline. Gasoline is
extremely flammable
and the vapors are
explosive. Never fuel
the machine indoors
or while the engine
is hot or running.
Extinguish cigarettes,
cigars, pipes and
other sources of
ignition.
Figure 4-1
Know Your Chipper Shredder
Chipper Chute
Hopper Assembly
Release Rod

11
4
WARNING
Never run the engine
indoors or in a poorly
ventilated area. Engine
exhaust contains
carbon monoxide, an
odorless and deadly
gas.
This Operators Manual covers a range of product
specifications for various models. Characteristics and
features discussed and/or illustrated in this manual may
not be applicable to all models. MTD reserves the right
to change product specifications, designs and equipment
without notice and without incurring obligation.
Starting Engine
WARNING: Never run the engine
indoors or in a poorly ventilated area.
Engine exhaust contains carbon monox-
ide, an odorless and deadly gas.
IMPORTANT: Because this manual covers several
different model units, different starting instructions may
apply to your particular engine. Some engines may have
a fuel petcock, some may not. Some engines may have
On/Off switches, other may not. Some units will utilize a
choke system, while others will require priming. These
factors depend on what make and model engine comes
with your particular unit. For these reasons, please refer
to the engine operator’s manual for the correct starting
procedure.
1. Attach spark plug wire to spark plug. Make certain
the metal cap on the end of the spark plug is fastened
securely over the metal tip on the spark plug.
2. Engines with choke lever:
Move choke lever on engine to CHOKE position. (A
warm engine may not require choking).
Engines with primer:
Prime engine as instructed in separate engine manual.
3. The throttle control lever is located on the engine.
Move engine throttle control lever to FAST or START
position. See Figure 4-2.
4. Grasp starter handle and pull rope out slowly until
engine reaches start of compression cycle (rope will
pull slightly harder at this point).
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,
and it should be expected until the impeller reaches full
speed.
5. Pull rope with a rapid, continuous, full arm stroke.
Keep a firm grip on starter handle. Let rope rewind
slowly.
6. Repeat the previous steps until engine fires. When
engine starts, move choke control (if equipped)
gradually to RUN position.
Stopping Engine
1. Move throttle control lever to STOP or OFF position.
2. Disconnect spark plug wire from spark plug and
ground against the engine.
NOTE: See your engine manual packed with your unit
for more detailed instructions.
Using The Chipper Shredder
Yard waste such as leaves and pine needles can be
raked up through the hopper assembly for shredding.
After material has been shredded by the flail blades
on the impeller assembly, it will be discharged out of
opening or into catcher bag. Do not attempt to shred
or chip any material other than vegetation found in a
normal yard (i.e. branches, leaves, twigs, etc.) Avoid
fibrous plants such as tomato vines until they are
thoroughly dried out. Twigs and small branches up to 3”
(2” for Model Series 450) in diameter can be fed into
the chipper chute.
Lowering The Hopper Assembly
1. With one hand grasp the handle at the top of the
hopper assembly and lift slightly.
2. With the other hand pull out on the release rod
and lower the hopper assembly to the ground. See
Figure 4-1.
To Empty Bag
1. Un-clip drawstring and loosen bag from chute
deflector opening.
2. Empty bag and reattach to the discharge chute
opening. Pull on the drawstring until the bag is tight
around the chute opening and clip the drawstring
tight against the chute deflector.
IMPORTANT: The flail screen is located inside the
housing in the discharge area. If the flail screen
becomes clogged, remove and clean as instructed in
SECTION 5: MAINTAINING YOUR CHIPPER SHRED-
DER. For best performance, it is also important to keep
the chipper blade sharp.
Operating
Your Chipper
Shredder
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, and it should
be expected until the impel-
ler reaches full speed.
Figure 4-2
STOP

12
5
Maintaining
Your Chipper
Shredder
WARNING
Always stop engine,
disconnect spark
plug, and ground
against engine
before cleaning,
lubricating or
doing any kind of
maintenance on your
machine.
Figure 5-1
Figure 5-2
General Recommendations
1. Always observe safety rules when performing
any maintenance.
2. The warranty on this chipper shredder does not
cover items that have been subjected to operator
abuse or negligence. To receive full value from war-
ranty, operator must maintain the chipper shredder
as instructed here.
3. Changing of engine-governed speed will void
engine warranty.
4. All adjustments should be checked at least once
each season.
5. Periodically check all fasteners and make sure these
are tight.
Lubrication
1. Lubricate the release rod and spring with light oil once
a season. See Figure 5-1.
2. Lubricate the pivot points on the hopper assembly with
light oil once a season. See Figure 5-1.
3. Lubricate the pivot points on the discharge chute with
light oil once a season. See Figure 5-1.
4. Follow the separate engine manual packed with you
unit for lubrication instructions.
Engine Care
Refer to the separate engine manual for all engine
maintenance instructions.
1. Check engine oil level before each use as instructed
in the separate engine manual packed with your unit.
Read and follow instructions carefully.
2. Clean air cleaner every 25 hours under normal condi-
tions or once a season. Clean every few hours under
extremely dusty conditions. To service the air cleaner,
refer to the separate engine manual packed with your
unit.
3. The spark plug should be cleaned and the gap reset
once a season. Check engine manual for correct plug
type and gap specifications.
4. Clean engine regularly with a cloth or brush. Keep the
cooling system (blower housing area) clean to permit
proper air circulation. Remove all grass, dirt and
combustible debris from muffler area.
Removing The Flail Screen
If the discharge area becomes clogged, remove the flail
screen and clean area as follows:
1. Stop the engine and make certain the chipper shred-
der has come to a complete stop.
2. Disconnect spark plug wire from spark plug and
ground against the engine.
3. a. Remove the bag and two wing knobs on each side
of the chute deflector. See Figure 5-2.
b. Lift the chute deflector up to keep it out of the way.
c. Remove the two hairpin clips from each clevis pin
which extend through the housing and remove pins.
d. Remove the flail screen from inside the housing
and clean the screen by scraping or washing with
water. See Figure 5-2.
4. Reinstall the screen, making certain to reassemble the
flail screen with the curve side down.
5. Reattach the chute deflector with the hardware
previously removed and connect the bag to unit.
Sharpening Or Replacing Chipper
Blades
1. Disconnect the spark plug wire and ground against the
engine.
2. Remove the flail screen as instructed in the previous
section.
3. Remove the chipper chute by removing three hex nuts
and washers.
*Model 464 Shown
Lubricate these
points before
reassembly.
A
B
C
D
*Model 464 Shown

13
5
WARNING
Figure 5-3
Figure 5-4
The impeller’s
chipper blades and
shredder blade are
sharp. Wear leather
work gloves to
protect your hands.
Maintaining
Your Chipper
Shredder
4. Remove the chipper chute support brace (Model
Series 460) from the frame by removing the hex bolts.
5. Rotate impeller assembly by hand until you locate one
of two chipper blades in the chipper chute opening.
6. Remove the blade by removing the internal hex
screws, lock washers, and hex nuts which secure it to
the impeller. Retain the hardware. See Figure 5-3.
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. Hold the Allen wrench stationary
and rotate the box (or socket) wrench to loosen the nut.
7. Install a replacement blade (Part No. 781-0490) with
the hardware removed earlier or sharpen.
IMPORTANT: When sharpening the blade, protect hands
by using gloves. Follow the original angle of grind and
make sure to remove an equal amount from each blade.
8. To replace the other blade, rotate the impeller to
expose the second blade and repeat the steps above.
NOTE: When reassembling the shredder blade, tighten
center bolt to between 550 and 700 in.-lbs. and the two
out bolts to between 250 and 350 in.-lbs.
WARNING: The impeller’s chipper
blades and shredder blade are sharp.
Wear leather work gloves to protect your
hands.
Sharpening Or Replacing The
Shredder Blade
1. Stop the engine and make certain that all moving
parts have come to a complete stop.
2. Disconnect the spark plug wire and ground against the
engine.
3. Lower the hopper assembly and block up the housing.
4. Remove the six hex lock nuts and flat washers
from the weld studs on the flail housing. Retain the
hardware.
5. Carefully separate the hopper assembly from the
impeller assembly and remove the support plate.
NOTE: When reassembling the support plate, make
certain the embossed tab faces inward towards the
impeller.
6. Remove the two wing knobs that secure the chute
deflector and raise the chute.
7. 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 into
the chute opening.
8. a. Remove the two internal hex screws, lock washers,
and hex lock nuts which secure the shredder blade
to the impeller.
b. Remove the hex bolt, lock washer, and flat washer
to completely free shredder blade. See Figure 5-4.
NOTE: Use a 3/16” hex key (Allen) wrench on the
outside of the shredder blade and a 1/2” box (or socket)
wrench on the inside of the shredder blade. Hold the
Allen wrench stationary and rotate the box (or socket)
wrench to loosen the nut. Use caution when removing
the blade to avoid contacting the weld studs on housing.
IMPORTANT: When sharpening the blade, follow
the original angle of grind as a guide. It is extremely
important that each cutting edge receives an equal
amount of grinding to prevent an unbalanced blade.
An unbalanced blade will cause excessive vibration
when rotating at high speeds and may cause damage
to the unit. The blade can be tested by balancing it on a
screwdriver or nail. Remove metal from the heavy side
until it is balanced evenly.
Storing Your Chipper Shredder
The following steps should be taken to prepare your
chipper shredder for storage.
1. Clean the equipment thoroughly.
2. Wipe equipment with an oiled rag to prevent rust.
3. Refer to engine manual for correct engine storage
instructions.
4. Store unit in a clean, dry area. Do not store next to
corrosive materials such as fertilizer.
IMPORTANT
When reassembling the
shredder blade, tighten
center bolt to between
550 and 700 in.-lbs.
and the two out bolts to
between 250 and 350
in.-lbs.
A
A
B

14
For repairs beyond
the minor adjust-
ments listed here,
contact an authorized
service dealer.
6
Trouble
Shooting
CauseProblem Remedy
Engine fails to start 1. Throttle lever not in correct starting
position (if equipped).
2. Spark plug wire disconnected.
3. Choke not in CHOKE position (if
equipped).
4. Fuel tank empty or stale fuel.
5. Engine not primed (if equipped).
6. Faulty spark plug.
7. Blocked fuel line.
8. Engine flooding.
1. Move throttle lever to FAST or START
position.
2. Connect wire to spark plug.
3. Move choke lever to CHOKE position.
4. Fill tank with clean, fresh gasoline.
5. Prime engine as instructed in engine
manual.
6. Clean, adjust gap, or replace.
7. Clean fuel line.
8. Wait a few minutes to restart, but do not
prime.
Engine runs erratic 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. Clear vent.
5. Drain fuel tank and carburetor. Refill with
fresh fuel.
6. Refer to engine manual.
7. See authorized service dealer.
1. Spark plug wire loose.
2. Unit running on CHOKE (if
equipped).
3. Blocked fuel line or stale fuel.
4. Gas cap vent plugged.
5. Water or dirt in fuel system.
6. Dirty air cleaner.
7. Carburetor out of adjustment.
Engine overheats 1. Fill crankcase with proper oil.
2. Refer to the engine manual packed with
your unit.
3. See authorized service dealer.
1. Engine oil level low.
2. Dirty air filter.
3. Carburetor not adjusted properly.
Occasional skip
(hesitates) at high speed
1. Adjust gap to .030”. Refer to engine
manual.
2. See authorized service dealer.
1. Spark plug gap too close.
2. Carburetor idle mixture adjustment
improperly set.
Excessive vibration 1. See authorized service dealer.
1. Loose parts or damaged impeller.
1. Low engine RPM.
2. Chipper blade dull.
Rate of discharge
slows considerably
or composition of
discharged material
changes.
1. Always run engine at full throttle.
2. Replace chipped blade or see your
authorized dealer.
Unit does not discharge 1. Stop engine immediately and disconnect
spark plug wire. Clean flail screen and
inside of discharge opening.
2. Stop engine and disconnect spark plug
wire. Remove lodged object.
3. Always run engine at full throttle
1. Chute deflector clogged.
2. Foreign object lodged in impeller.
3. Low engine RPM.

15
7
Warranty
Failure to comply
with suggested
maintenance
and lubrication
specifications
will void
warranty.
TWO YEAR LIMITED WARRANTY
The limited warranty set forth below is given by MTD Products Limited with respect to new merchandise purchased and
used in Canada and/or its territories and possessions (either entity respectively, “MTD”).
MTD warrants this product (excluding its normal wear parts as described below) against defects in material and
workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair
or replace, free of charge, any part found to be defective in materials or workmanship. This limited warranty shall
only apply if this product has been operated and maintained in accordance with the Operator’s Manual furnished with
the product, and has not been subject to misuse, abuse, commercial use, neglect, accident, improper maintenance,
alteration, vandalism, theft, fire, water, or damage because of other peril or natural disaster. Damage resulting from the
installation or use of any part, accessory or attachment not approved by MTD for use with the product(s) covered by
this manual will void your warranty as to any resulting damage.
Normal wear parts are warranted to be free from defects in material and workmanship for a period of thirty (30) days
from the date of purchase. Normal wear parts include, but are not limited to items such as: batteries, belts, blades,
blade adapters, grass bags, rider deck wheels, seats, snow thrower skid shoes, friction wheels, shave plates, auger
spiral rubber, tires, engine oil, air filters and spark plugs.
HOW TO OBTAIN SERVICE: Warranty service is available, WITH PROOF OF PURCHASE, through your local
authorized service dealer. To locate the dealer in your area contact MTD Products Limited, Kitchener, ON N2G 4J1, or
call 1-800-668-1238 or log on to our Web site at www.mtdcanada.com.
This limited warranty does not provide coverage in the following cases:
a. The engine or component parts thereof. These items may carry a separate manufacturer’s warranty. Refer to
applicable manufacturer’s warranty for terms and conditions. The Powermore engine is not excluded under this
agreement.
b. Log splitter pumps, valves, and cylinders have a separate one-year warranty.
c. Routine maintenance items such as lubricants, filters, blade sharpening, tune-ups, brake adjustments, clutch
adjustments, deck adjustments, and normal deterioration of the exterior finish due to use or exposure.
d. Service completed by someone other than an authorized service dealer.
e. MTD does not extend any warranty for products sold or exported outside of Canada, including possessions and
territories.
f. Replacement parts that are not genuine MTD parts.
g. Transportation charges and service calls.
h. If Products are used commercially. (MTD may separately offer Limited Commercial Warranties on certain select
products. Ask your dealer or retailer for details or contact MTD Service for more information.)
No implied warranty, including any implied warranty of merchantability of fitness for a particular purpose,
applies after the applicable period of express written warranty above as to the parts as identified. No other
express warranty, whether written or oral, except as mentioned above, given by any person or entity, including
a dealer or retailer, with respect to any product, shall bind MTD. During the period of the warranty, the exclu-
sive remedy is repair or replacement of the product as set forth above.
The provisions as set forth in this warranty provide the sole and exclusive remedy arising from the sale. MTD
shall not be liable for incidental or consequential loss or damage including, without limitation, expenses
incurred for substitute or replacement lawn care services or for rental expenses to temporarily replace a
warranted product.
Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages, or limitations on how
long an implied warranty lasts, so the above exclusions or limitations may not apply to you.
In no event shall recovery of any kind be greater than the amount of the purchase price of the product sold. Alteration
of safety features of the product shall void this warranty. You assume the risk and liability for loss, damage, or
injury to you and your property and/or to others and their property arising out of the misuse or inability to use the
product.
This limited warranty shall not extend to anyone other than the original purchaser or to the person for whom it was
purchased as a gift.
HOW LOCAL LAWS RELATE TO THIS WARRANTY: This limited warranty gives you specific legal rights, and you
may also have other rights that vary in different jurisdictions.
IMPORTANT: Owner must present Original Proof of Purchase to obtain warranty coverage.
MTD Products Ltd., P. O. BOX 1386, KITCHENER, ON N2G 4J1; Phone: [phone].06

16
34
38
35
A
A
B
B
20
2
34
42
28
34
37 35
35
34
8
25 1
23
48
7
7
21
19
9
2
11
14
3
27
5
13
34
13
16
15
11
18
18
11
24
16
30
6
38
40
34
29
41
38 37
33
10
10
12
38
38
22
39
26
32
36 31
17
Models 450 and 460/
Modèles 450 et 460

17
8
For parts and/or
accessories refer to
customer support on
page 2.
Adressez-vous au
«Service après-
vente» à la page 2
pour ce qui concerne
les pièces et/ou
accessoires.
Parts List
Pièces
détachées
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1 1! 3&$#$!321D'E #(3!341)0F(2
 !, ? ( 0,- #A$ (30(
 1 3#$!32102 #(32!341)02
 11 ?$5())$#$2 5())$$
" 1! #9)&$ &I($
 ! #$,-22 5())$ J $
  %7) 5) 0 $7) 
  ?$@2132G32 )$4134H34
 !! $2%$$& 23202 '() ( $2434)02
! ! ?$@2!!321G32 )$4!!341H34
1  35134'21 B .$C$32134F(21
 !!1 5)2132102 H$$ 41341)02
  ?$@2321 )$4341
 !" 32;($1 %$/(+01
" , ))% % $/7 
!  #$,-?$2 5())$$
!   6 0+0
!  )) 6/7 
!,!1!
22

18
Models 450 and 460/
Modèles 450 et 460
7
13
10
8
11
10
26
24
25
22
7
12
9
7
9
6
21
20
20
18
17
19
16
17
19
23
15
5
2
34
1
69
14
8
11
27
10
Model/Modèle 450

19
8
For parts and/or
accessories refer to
customer support on
page 2.
Adressez-vous au
«Service après-
vente» à la page 2
pour ce qui concerne
les pièces et/ou
accessoires.
Parts List
Pièces
détachées
 
 
 
   
  
  
  ! "
 # ! $
 ##% %&&'( )*
#+,$- ,.#.$
/,/- ,0#1.
 +,2!/3- /45"&- 
# +,6- ,. 7&48,/- ,0
# !9&.:),. );,.# /*/0):,0 );,0#
 #  .9&.. :),.<),.#/&0 ):,0);,0#
  +,3-#.. =,/-#1.
   
 % +,!/23-#./45"&-#1.
  +,$-#,.>2..$/,/-#,01.
?6-///&@ ?5&@
+,$-#,.>2..$/,/-#,01.
?6-//&@ ?5&@
# 29&-#>:),./*/&-#):,0
#### !9&.# :),.<),. /0# ):,0);,0
  %, ;&&&
  %, ;&&&
# .# :),. ;/&0# ):,0
 # 9%&&5"(5 ;/&5"5
   9%&&A(, , ;/&5", ,
# &->) 4/*/-
# % !5?6-///&@ $B?5&@
#% !5?6-//@ $B?//@
 # 9&.:),.<) /0):,0);
 % 6-#,.7&-#,0
  ;"6!/ 
  <)/ C(/
#  <)/;/ /
##  $%&&'(?/&6/@ &"(&?//&@
 ##  $%&&'(?/&6/@ &"(&?//&@
#  
 #
..
D /(-
 D #/(-

17
NOTES:
For parts and/or
accessories refer to
customer support on
page 2.
Adressez-vous au
«Service après-vente»
à la page 2 pour
ce qui concerne
les pièces et/ou
accessoires.