Troy Bilt 424 User Manual

Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty  
OPERATOR’S MANUAL  
Model 24A-424G766 Shown  
Chipper Shredder — Models 414 & 424  
IMPORTANT  
READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION  
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-  
covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).  
If a spark arrester is used, it should be maintained in effective working order by the operator. 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 engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland,  
Ohio 44136-0019.  
FORM NO. 769-00830B  
PRINTED IN U.S.A.  
6/01/2005  
TROY BILT LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019  
 
 
 
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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  
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manual before at-  
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tempting to operate  
this machine. Failure  
to comply with these  
instructions may result  
in personal injury. When  
you see this symbol.  
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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.  
3
WARNING: Engine Exhaust, some of its constituents, and certain vehicle compo-  
nents contain or emit chemicals known to State of California to cause cancer and  
birth defects or other reproductive harm.  
2
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.  
Safe  
Operation Failure to observe the following safety instructions could result in serious injury or death.  
Training  
Preparation  
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.  
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 opera-  
tion or while performing an adjustment or repair, to protect  
eyes. Thrown objects which ricochet can cause serious  
injury to the eyes.  
Practices  
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.  
3. 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.  
4. Before starting, check all bolts and screws for proper tight-  
ness to be sure the machine is in safe working condition.  
Also, visually inspect machine for any damage at frequent  
intervals.  
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  
6. Never run an engine indoors or in a poorly ventilated area.  
Engine exhaust contains carbon monoxide, an odorless  
and deadly gas.  
5. Maintain or replace safety and instructions labels, as  
necessary.  
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 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.  
6. 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.  
manual before at-  
a. Use only an approved gasoline container.  
b. Extinguish all cigarettes, cigars, pipes, and other  
sources of ignition.  
tempting to operate  
this machine. Failure  
to comply with these  
instructions may result  
in personal injury. When  
you see this symbol.  
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 refuel-  
ing.  
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.  
g. Replace gasoline cap and tighten securely.  
h. If gasoline is spilled, wipe it off the engine and equip-  
ment. 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.  
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.  
4
Operation  
Maintenance & Storage  
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.  
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.  
2
3. Thoroughly inspect all material to be shredded and remove 3. Before cleaning, repairing, or inspecting, stop the engine  
Safe  
Operation  
Practices  
any metal, rocks, bottles, cans, or other foreign objects  
which could cause personal injury or damage to the  
machine.  
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.  
4. Do not change the engine governor settings or overspeed  
the engine. The governor controls the maximum safe  
operating speed of the engine.  
I4. f it becomes necessary to push material through the  
shredder hopper, use a small diameter stick. Do not use  
your hands or feet.  
I5. f 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:  
a. Inspect for damage.  
5. Maintain or replace safety and instruction labels, as neces-  
sary.  
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 light such as a water  
heater, furnace, clothes dryer, etc.  
8. Always refer to the operator’s manual for proper instructions  
on off-season storage.  
b. Repair or replace any damaged parts.  
c. Check for any loose parts and tighten to assure  
continued safe operation.  
WARNING  
6. Do not allow an accumulation of processed material to build 9. If the fuel tank has to be drained, do this outdoors.  
up in the discharge area. This can prevent proper discharge  
and result in kickback of material through the feed opening.  
7. 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.  
8. 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.  
9. 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.  
10. Keep all guards, deflectors and safety devices in place and  
operating properly.  
11. 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.  
10. Observe proper disposal laws and regulations for gas, oil,  
etc. to protect the environment.  
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 man-  
ual before attempting to  
operate this machine.  
Failure to comply with  
these instructions may  
result in personal injury.  
When you see this  
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 Modifica-  
tion (EM) and Three Way Catalyst (TWC) if so equipped.  
Your Responsibility  
Restrict the use of this power machine to persons who read, un-  
derstand and follow the warnings and instructions in this manual  
and on the machine.  
12. Never operate this machine without good visibility or light.  
13. Do not operate this machine on a paved, gravel or non-level  
surface.  
symbol.  
HEED IT’S WARNING!  
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.  
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.  
5
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.  
3
Loose Parts In Carton  
a. Debris Collection Bag  
b. Tow Bar  
Setting Up  
Your Chipper  
Shredder  
c. Safety Glasses  
d. Engine Oil  
Lowering The Chipper Chute  
(Model 24A-424G766 Only)  
1. For shipping reasons, the unit is crated with its chipper  
chute in a raised position. To pivot it downward,  
proceed as follows:  
a. Pull the spring latch upward.  
b. Gently pivot the chipper chute down until it clicks  
into the lock rod. See Figure 1.  
WARNING  
Figure 1  
WARNING: Never operate the chipper  
shredder with the chipper chute in the  
raised position. Doing so may result in  
property damage or serious injury to  
the operator or bystanders.  
Never operate the  
chipper shredder with  
the chipper chute in the  
raised position. Doing  
so may result in prop-  
erty damage or serious  
injury to the operator  
or bystanders.  
Attaching The Debris  
Collection Bag  
2. To attach the bag:  
a. Place the opening of the bag completely over the  
chute deflector.  
b. Position the bag so that the wing knobs which  
secure the chute deflector to the impeller housing  
are completely covered.  
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.  
c. Pull on the drawstrap until the bag is tight around  
chute deflector opening. See Figure 2.  
Figure 2  
Attaching The Tow Bar  
3. To attach the tow bar:  
a. Remove the spring pin and clevis pin from the end  
of the tongue. See Figure 3.  
b. Insert the tongue into the base.  
c. Reinsert the clevis pin through aligning holes in  
both the tongue and the base. Fasten with the  
spring pin to secure. See Figure 3.  
NOTE: All references in  
this manual to the left  
or right side of the chip-  
per shredder is from  
the operating position  
only. Exceptions, if any,  
will be specified.  
Figure 3  
6
KnowYour Chipper Shredder  
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3
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Setting Up  
Your Chipper  
Shredder  
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WARNING  
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Never operate the  
chipper shredder with  
the chipper chute in the  
raised position. Use the  
spring latch to lower  
the chipper chute into  
the operating position  
before starting the  
engine.  
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Model 24A-424G766 Shown  
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Figure 4  
Now that you have set up your chipper shredder for  
operation, get aquainted with its controls and fea-  
tures. These are described below and illustrated on  
this page. This knowledge will allow you to use your  
new equipment to its fullest potential.  
WARNING: Never operate the chipper  
shredder with the chipper chute in the  
raised position. Use the spring latch  
to lower the chipper chute into the  
operating position before starting the  
engine.  
IMPORTANT  
Never place branches  
with a diameter greater  
than 1/2-inch in the  
hopper. Doing so  
Chipper Chute  
Lock Rod  
Branches up to 3” in diameter may be fed into the  
chipper chute for chipping. See Figure 4.  
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. See Figure 4.  
Hopper  
Leaves, twigs and branches up to 1/2-inch in diam-  
eter may be placed into the hopper for shredding.  
See Figure 4.  
Tow Bar  
can result in serious  
damage to your unit’s  
shredder blade, flails or  
impeller.  
Use the tow bar to tow the chipper shredder behind  
a tractor to a job site. See Figure 4.  
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.  
Handle  
Use the handle when manually transporting the  
chipper shredder. See Figure 4.  
Starter Handle  
The starter handle is located on the engine. Pull the  
starter handle to start engine. See Figure 4.  
Spring Latch  
Engine Controls  
The spring latch is located on the top of the hopper.  
It is used to release or lock the chipper chute in a  
raised position for storage or for transporting. See  
Figure 4.  
See the Briggs & Stratton Owner/Operator manual  
packed with your unit for the location and function  
of the controls on the engine.  
7
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 chipping or shredding  
and while performing any adjustments  
or repairs.  
4
Operating  
Your Chipper  
Shredder  
Gas and Oil Fill-Up  
Service the engine with gasoline and oil as instructed in  
the separate engine manual packed with your chipper  
shredder. Read instructions carefully.  
 
WARNING: Never fill fuel tank indoors  
with engine running or until the engine  
has been allowed to cool for at least  
two minutes after running.  
WARNING  
The operation of any  
chipper shredder  
Figure 5  
Starting Engine  
1. Attach spark plug wire to spark plug. Make certain  
the metal cap on the end of the spark plug is  
fastened securely over metal tip on the spark plug.  
can result in foreign  
objects being thrown.  
Always wear the safety  
glasses provided with  
this unit or eye shields  
before chipping or  
2. Open fuel shut-off valve ( Model  
424).  
 
3. Move choke control lever to  
CHOKE position. See Figure 5.  
shredding and while  
performing any adjust-  
ments or repairs.  
NOTE: A warm engine may not require choking.  
4. Move throttle control lever to FAST (rabbit) position  
(Model 414) or push rocker switch to ON (Model  
424). See Figure 5.  
Never fill fuel tank  
indoors with engine  
running or until the  
engine has been  
allowed to cool for  
at least two minutes  
after running.  
5. 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 “clanking” noise may be heard when pulling  
the starter rope. It is completely normal and does NOT  
indicate a malfunction of any kind.  
Never run the engine  
indoors or in a poorly  
ventilated area. En-  
gine exhaust contains  
carbon monoxide, an  
odorless and deadly  
gas.  
Figure 6  
6. Pull rope with a rapid, continuous, full arm stroke.  
Keep a firm grip on starter handle. Let rope rewind  
slowly.  
Stopping Engine  
1. Move throttle control lever to STOP position (Model  
414) or push rocker switch to OFF (Model 424). See  
Figure 6.  
7. Repeat the previous steps until engine starts. When  
engine starts, move choke control gradually to RUN  
position until the engine is running smoothly.  
NOTE: See your engine manual packed with your unit for  
more detailed instructions.  
Never stop the engine  
by moving the choke  
lever into the CHOKE  
position. Backfire,  
fire or engine damage  
could result.  
WARNING: Never run the engine  
indoors or in a poorly ventilated area.  
Engine exhaust contains carbon  
monoxide, an odorless and deadly  
gas.  
CAUTION: Never stop the engine by  
moving the choke lever into the CHOKE  
position. Backfire, fire or engine damage  
could result.  
8
Operating The Chipper Shredder  
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:  
1. Never attempt to shred material other than normal  
yard debris (leaves, twigs, pine cones, etc.).  
4
Operating  
Your Chipper  
Shredder  
2. 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.  
3. Place reasonable amounts of debris into the hopper at  
a time. Do not overload the hopper.  
Figure 7  
4. 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.  
Chipping  
WARNING  
WARNING: Never operate the chip-  
per shredder without chipper chute  
lowered into the operating position.  
Never operate the chip-  
per shredder without  
chipper chute lowered  
into the operating  
position.  
5. Avoid placing twigs longer than 24 inches into the  
hopper. Twigs longer than 24 inches may result in a  
clogged hopper.  
Branches up to 3” in diameter can be fed into the  
chipper chute. Observe the following guidelines when  
chipping branches:  
1. Keep both hands firmly on the branch as you feed it  
into the chipper chute.  
6. Never place branches with a diameter greater than  
1/2-inch in the hopper. Doing so can result in serious  
damage to the unit’s shredder blade, flails or impeller.  
2. Never feed more than one branch into the chipper  
chute at a time.  
Clearing the Hopper  
Should the hopper become clogged with debris during  
operation, proceed as follows:  
IMPORTANT  
3. Never feed anything other than branches (or wood)  
into the chipper chute.  
Never place branches  
with a diameter greater  
than 1/2-inch in the hop-  
per. Doing so can result  
in serious damage to your  
unit’s shredder blade,  
flails or impeller.  
1. Grasp the handle with both hands and gently agitate  
the chipper shredder to help loosen debris, drawing it  
into the impeller.  
4. 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.  
If the clog does not clear, proceed as follows:  
1. Stop engine.  
2. Use your hands to remove any debris found near the  
top of the hopper.  
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.  
3. Use a branch (or other available device, i.e. broom-  
stick) to dislodge debris located toward the base of the  
hopper.  
IMPORTANT  
Never feed branches with  
a diameter greater than  
three (3) inches into the  
chipper chute. Doing so  
can result in serious dam-  
age to your unit’s chipper  
blades, flails or impeller.  
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.  
4. Restart engine.  
NOTE: If you’re unable to pull the starter rope as a  
result of accumulated debris near the impeller, follow  
instructions under the heading Cleaning the Reduction  
Chamber in the “Maintaining Your Chipper Shredder”  
section of this manual.  
Emptying the Debris Collection Bag  
1. Stop engine.  
2. Squeeze the locking buckle release the bag’s  
drawstrap before loosening it from the chute deflec-  
tor. See Figure 7.  
3. Empty the bag and reattach to the chute deflector  
opening. Refer to Figure 2.  
9
under extremely dusty conditions. Replace the air  
cleaner cartridge once a season. To service the air  
cleaner, refer to the separate engine manual.  
3. The spark plug should be cleaned and the gap reset  
once a season. Refer to the separate engine manual  
for correct plug type and gap specifications.  
5
Maintaining  
Your Chipper  
Shredder  
Chipper Shredder Care  
Before each use, visually inspect your chipper shredder  
for loose (or missing) nuts and bolts. Securely tighten  
(or replace) all hardware before operating the chipper  
shredder.  
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.  
Figure 8  
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:  
WARNING  
1. Stop engine, disconnect spark plug, and make certain  
the chipper shredder has come to a complete stop.  
Always stop engine,  
disconnect spark plug,  
and ground against  
engine before cleaning,  
lubricating or doing any  
kind of maintenance on  
your machine.  
WARNING: The muffler and surrounding  
area will be hot if the engine has been  
running. Use caution and protect your  
hands if working near the muffler.  
2. a. If attached, remove debris bag. Remove the two  
wing knobs on either side of the chute deflector and  
pivot the chute deflector upward. See Figure 8.  
b. Remove the hairpin clip from the clevis pin which  
extends through the housing and shredder screen.  
See Figure 8. Remove clevis pin.  
c. Pivot the shredder screen upward and clean the  
surrounding area by scraping away debris.  
3. 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  
The impeller’s chip-  
per blades are sharp.  
Wear leather work  
gloves to protect your  
hands.  
Model 24A-424G766 Shown  
Figure 9  
WARNING: Always stop engine,  
disconnect spark plug, and ground  
against engine before cleaning,  
lubricating or doing any kind of  
maintenance on your machine.  
Lubrication  
1. Lubricate the chipper chute hinge a with light oil  
once a season.  
4. When the area is cleaned, pivot the shredder screen  
downward and re-secure with the clevis pin and  
hairpin clip removed earlier.  
2. Lubricate the pivot points on the chute deflector with  
light oil once a season.  
3. Refer to the Briggs & Stratton Owner/Operator  
manual packed with your unit for engine lubrication  
instructions.  
5. Reattach the debris collection bag to the chute deflec-  
tor, if desired.  
Sharpening Or Replacing Chipper  
Blades  
Engine Care  
Refer to the Maintenance section of the Briggs &  
Stratton Owner/Operator manual packed with your unit.  
Read and follow instructions carefully.  
1. Check engine oil level before each use as  
instructed in the separate engine manual.  
WARNING: The impeller’s chipper  
blades are sharp. Wear leather work  
gloves to protect your hands.  
1. Stop engine, disconnect spark plug, and make certain  
the chipper shredder has come to a complete stop.  
2. Clean air cleaner’s precleaner every 25 hours  
under normal conditions. Clean every few hours  
10  
2. Pivot the shredder screen upward as instructed under  
the heading Cleaning the Reduction Chamber.  
3. a. Remove the chipper chute support brace from the  
frame by removing the two hex bolts and saddle  
washers which secure it. See Figure 9.  
5
b. Remove the chipper chute by removing three hex  
nuts and washers which secure it to the impeller  
housing. See Figure 9.  
Rotate the impeller by hand until one of the two  
chipper blades is visible through the impeller  
housing opening.  
c. Remove the blade by removing the internal hex  
screws, lock washers and hex nuts which secure it  
to the impeller. Retain the hardware.  
Maintaining  
Your Chipper  
Shredder  
Figure 10  
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.  
4. Install a replacement blade (Part No. 742-0544) with  
the hardware removed earlier or sharpen.  
WARNING  
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.  
5. To replace the other blade, rotate the impeller to  
expose the second blade and repeat the steps above.  
The shredder blade is  
sharp. Wear leather  
work gloves to  
protect your hands.  
NOTE: 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.  
Figure 11  
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.  
Sharpening Or Replacing The  
Shredder Blade  
IMPORTANT  
Make certain chipper  
blades are reassem-  
bled with the sharp  
edge outward (toward  
the chipper chute).  
Torque hardware to  
between 20 ft.-lbs and  
25 ft.-lbs.  
WARNING: The shredder blade is sharp.  
Wear leather work gloves to protect  
your hands.  
c. Remove the hex bolt, lock washer, and flat washer  
to completely free shredder blade. See Figure 11.  
1. Stop engine,disconnect spark plug, and make certain  
that all moving parts have come to a complete stop.  
IMPORTANT: If sharpening the blade for reuse, follow  
the original angle of grind as a guide. Make certain each  
cutting edge receives an equal amount of grinding to  
prevent an unbalanced blade. Remove metal from the  
heavy side until it is balanced evenly.  
2. Remove the two flange nuts (and hex bolts) which  
secure the hopper support bracket to the impeller  
housing. Retain the hardware. See Figure 10.  
3. Pivot the shredder screen upward as instructed under  
IMPORTANT: When reassembling the blade, tighten  
center bolt to between 45 ft.-lbs and 60 ft.-lbs and the  
two out bolts to between 20 ft.-lbs and 25 ft.-lbs.  
IMPORTANT  
the heading Cleaning the Reduction Chamber.  
When reassembling the  
shredder blade, tighten  
center bolt to between  
45 ft.-lbs and 60 ft.-lbs  
and the two out bolts to  
between 20 ft.-lbs and  
25 ft.-lbs.  
4. a. Remove six flange nuts which secure hopper inlet  
guide to impeller housing. See Figure 11.  
Carefully separate the hopper assembly from the  
impeller housing and set it aside.  
StoringYour Chipper Shredder  
1. Clean the equipment thoroughly.  
• Insert a piece of wood into the chute deflector  
opening to stabilize the impeller and prevent it from  
rotating when removing the shredder blade.  
b. Remove the two internal hex screws, hex lock nuts,  
and lock washers which secure the shredder blade  
to the impeller. See Figure 11.  
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.  
11  
Problem  
Cause  
Remedy  
1. Throttle lever not in correct starting  
position (if equipped).  
1. Move throttle lever to FAST or  
START position.  
Engine fails to start  
6
2. Spark plug wire disconnected.  
2. Connect wire to spark plug.  
3. Choke not in CHOKE position (if  
equipped).  
3. Move choke lever to CHOKE  
position.  
Trouble  
Shooting  
4. Fuel tank empty or stale fuel.  
4. Fill tank with clean, fresh gasoline.  
5. Engine not primed (if equipped).  
5. Prime engine as instructed in  
Engine Manual.  
6. Clean, adjust gap, or replace.  
7. Clean fuel line.  
6. Faulty spark plug.  
7. Blocked fuel line.  
8. Engine flooded.  
8. Wait a few minutes to restart, but  
do not prime.  
1. Spark plug wire loose.  
1. Connect and tighten spark  
plug wire.  
Engine runs erratic  
2. Unit running on CHOKE (if equipped).  
3. Blocked fuel line or stale fuel.  
2. Move choke lever to OFF position.  
3. Clean fuel line; fill tank with clean,  
fresh gasoline.  
For repairs beyond  
the minor adjustments  
listed here, contact  
an authorized service  
dealer.  
4. Vent in gas cap plugged.  
5. Water or dirt in fuel system.  
4. Clear vent.  
5. Drain fuel tank. Refill with  
fresh fuel.  
6. Dirty air cleaner.  
6. Refer to engine manual.  
7. Carburetor out of adjustment.  
7. See authorized service dealer.  
1. Engine oil level low.  
1. Fill crankcase with proper oil.  
2. Refer to engine manual.  
Engine overheats  
2. Dirty air cleaner.  
3. Carburetor not adjusted properly.  
3. See authorized service dealer.  
1. Spark plug gap too close.  
1. Adjust gap to .030”.  
Occasional skips  
(hesitates) at  
high speed  
2. Carburetor idle mixture adjustment  
improperly set.  
2. See authorized service dealer.  
Excessive  
Vibration  
1. Loose parts or damaged impeller.  
1. Chute deflector clogged.  
1. See authorized service dealer.  
1. Stop engine immediately and  
disconnect spark plug wire. Clean  
flail screen and inside of discharge  
opening.  
Unit does not  
discharge  
2. Foreign object lodged in impeller.  
2. Stop engine and disconnect spark  
plug wire. Remove lodged object.  
3. Low engine RPM.  
1. Low engine RPM.  
2. Chipper blade dull.  
3. Always run engine at full throttle.  
1. Always run engine at full throttle.  
Rate of discharge  
slows considerably  
or composition of  
discharged material  
changes  
2. Replace chipper blade or see your  
authorized service dealer.  
12  
Models 414 & 424  
7
1
2
3
4
5
6
7
8
9
681-04009 Impeller Assembly Complete  
710-1054 Machine Screw, 5/16-24 x 1.0  
711-0833B Clevis Pin,.496  
Parts List  
712-0411  
715-0166  
719-0329  
736-0119  
Hex Lock Nut, 5/16-24  
Spiral Pin,.156 x 1.0  
Flail  
 
Lock Washer, 5/16  
742-04050 Shredder Blade  
742-0544  
Chipper Blade  
Retainer Clip  
To order replacement  
parts, contact  
1-800-520-5520,  
1-330-558-7220  
or visit  
10 781-0735  
1
2
3
4
5
6
7
8
9
681-0133  
Tongue Hitch Mount  
681-0134A Base Hitch Mount  
710-3001  
711-0299  
711-0835  
712-3017  
732-0194  
736-0133  
736-0169  
Hex Cap Screw, 3/8-16 x.88  
Clevis Pin,.625 x 2.4  
Clevis Pin,.50 x 4.62  
Hex Nut, 3/8-16  
Spring Pin  
Flat Washer,.411 x 1.25 x 1.0  
Lock Washer, 3/8  
13  
Models 414 & 424  
 
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Model 424 Only  
Model 414 Only  
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14  
1
2
3
4
5
6
7
8
9
681-04006† Upper Chipper Chute Assembly  
681-04007† Lower Chipper Chute Assembly  
710-0106† Hex Cap Screw, 1/4-20 x 1.25  
34 681-04002 Outer Flail Housing Assembly  
35 710-0157 Hex Cap Screw, 5/16-24 x.75  
36 710-0502A Hex Sems Screw, 3/8-16 x 1.25  
7
710-3013  
712-3010  
712-3027  
Hex Cap Screw, 1/4-20 x.5  
Hex Nut, 5/16-18  
37 710-0825  
38 710-3025  
39 726-0211  
40 736-0119  
41 736-0170  
42 750-0793  
43 681-0048  
720-0170  
Hex Cap Screw, 1/4-20 x 3.75  
Hex Cap Screw, 5/16-18 x.625  
U-Nut, 5/16-18  
Hex Lock Nut 1/4-20  
Parts List  
714-0104† Cotter Pin  
Lock Washer, 5/16  
728-0175† Pop Rivet  
Special Lock Washer, 5/16  
Hinge Spacer,.265 x.380 x 1.66  
Knob Assembly (Incl. ref.# 12 & 61)  
Knob Only, 5/16-18  
732-0306A† Compression Spring,.531 x 1.75  
10 735-0249A† Chute Flap  
11 736-0140† Flat Washer  
12 736-0242  
13 736-0451  
Bell Washer.340 ID x.872 OD  
Washer,.320 ID x.93 OD  
44 681-0094  
45 711-0835  
Chute Deflector Assembly  
Clevis Pin,.50 x 4.62  
14 747-04163† Lock Rod  
46 714-0149B Internal Cotter Pin  
47 719-04070 Shredder Screen  
To order replacement  
parts, contact  
1-800-520-5520,  
1-330-558-7220  
or visit  
15 749-1004† Chipper Chute Support  
16 781-04032† Chipper Chute Hinge  
17 781-0633† Chute Flap Strip  
18 681-04011 Shredder Hopper Assembly  
48 726-0214  
49 734-1845  
50 736-0366  
51 738-0813  
Push Cap, 5/8  
Wheel, 10 x 4 x 4  
Flat Washer,.625 x 1.0  
Axle, 22.47”  
19 710-0809  
20 710-0805  
Hex Cap Screw, 1/4-20 x 1.250  
Hex Cap Screw, 5/16-18 x 1.50  
52 737-0195‡ Elbow Fitting  
53 737-0132† Oil Drain End Cap  
54 737-0298† Oil Drain Pipe  
21 712-04065† Flange Lock Nut, 3/8-16  
22 712-3004A Flange Lock Nut, 5/16-18  
23 732-04167† Torsion Spring  
55 710-1254  
56 736-0217  
57 736-0247  
Hex Cap Screw, 3/8-24 x 2.2  
24 736-0182† Spring Washer,.50 x 1.0 x.022  
25 736-0326† Flat Washer,.50 x 1.0 x.0125  
26 738-0430† Shoulder Screw, 3/8-16,.50 x.685  
27 749-04103 Hopper Handle  
Lock Washer, 3/8  
Flat Washer,.406 x 1.25  
58 681-04009 Impeller Assembly  
(See page 13 for Impeller Parts)  
Flat Washer,.28 x.74 x.063  
60 726-0233† Push Nut,.25ID x.50OD  
61 726-0201 Speed Nut,.3125ID  
28 749-04104 Tube Support  
59 736-0173  
29 781-04007 Shredder Plate  
30 781-04027 Hopper Support Bracket  
31 781-04033 Inlet Guide  
62 681-0095‡ Chipper Chute  
32 681-0117  
Inner Flail Housing Assembly  
— 664-04023 Debris Collection Bag (Not Shown)  
33 681-0183A† Frame Assembly  
681-0184A‡ Frame Assembly  
723-0400  
Safety Glasses  
Model 424 Only  
Model 414 Only  
15  
MANUFACTURER’S LIMITED WARRANTY FOR  
The limited warranty set forth below is given by Troy-Bilt LLC with respect  
deck adjustments, and normal deterioration of the exterior finish  
to new merchandise purchased and used in the United States and/or its  
territories and possessions, and by MTD Products Limited with respect to  
new merchandise purchased and used in Canada and/or its territories and  
possessions (either entity respectively, “Troy-Bilt”).  
due to use or exposure.  
Service completed by someone other than an authorized service  
dealer.  
d.  
e.  
Troy-Bilt does not extend any warranty for products sold or  
exported outside of the United States and/or Canada, and  
their respective possessions and territories, except those sold  
through Troy-Bilt’s authorized channels of export distribution.  
Replacement parts that are not genuine Troy-Bilt parts.  
Transportation charges and service calls.  
If Products are used commercially. (Troy-Bilt may separately  
offer Limited Commercial Warranties on certain select products.  
Ask your dealer or retailer for details or contact Troy-Bilt Service  
for more information).  
Troy-Bilt” 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 Troy-Bilt for use with  
the product(s) covered by this manual will void your warranty as to any  
resulting damage.  
f.  
g.  
h.  
No implied warranty, including any implied warranty of merchant-  
ability of fitness for a particular purpose, applies after the applicable  
period of express written warranty above as to the parts as identi-  
fied. 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 Troy-Bilt. During the  
period of the warranty, the exclusive remedy is repair or replacement  
of the product as set forth above.  
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 and  
tires.  
The provisions as set forth in this warranty provide the sole and  
exclusive remedy arising from the sale. Troy-Bilt 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.  
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:  
In the U.S.A.  
Some states 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.  
Check your Yellow Pages, or contact Troy-Bilt LLC at P.O. Box 361131,  
Cleveland, Ohio 44136-0019, or call 1-866-840-6483 or 1-330-558-7220,  
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.  
In Canada  
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:  
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.  
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.  
Log splitter pumps, valves, and cylinders have a separate  
one- year warranty.  
HOW STATE LAW RELATES TO THIS WARRANTY: This limited war-  
ranty gives you specific legal rights, and you may also have other rights  
which vary from state to state.  
b.  
c.  
Routine maintenance items such as lubricants, filters, blade  
sharpening, tune-ups, brake adjustments, clutch adjustments,  
IMPORTANT: Owner must present Original Proof of Purchase to obtain  
warranty coverage.  
Troy-Bilt LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019; Phone: 1-866-840-6483, 1-330-558-7220  
MTD Canada Limited - KITCHENER, ON N2G 4J1; Phone 1-800-668-1238  

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