Generac Power Systems GC3000C User manual

Owner’s Manual
GC3000C Chipper/Shredder
SAVE THIS MANUAL FOR FUTURE REFERENCE
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(888-436-3722)
MODEL NUMBER: _________________________
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
Original Language
010529

ii Owner’s Manual for Chipper/Shredder
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Owner’s Manual for Chipper/Shredder iii
Table of Contents
Section 1: Safety Rules & General 
Information
Introduction ..................................................................1
Read This Manual Thoroughly ....................................1
Safety Rules .................................................................1
How to Obtain Service .................................................1
General Hazards ...........................................................2
Exhaust and Fuel Hazards ..........................................3
Fire Hazards .................................................................4
Safety and Operating Decals ......................................4
Section 2: General Information and Setup
Specifications ...............................................................5
Components and Controls ..........................................5
Know Your Chipper/Shredder .....................................6
Emissions .....................................................................6
Remove Contents from Carton ...................................6
....................................................................................6
Attaching Shredder Hopper and 
Hammermill Housing ...................................................7
Attaching Chipper Chute .............................................8
Attaching Discharge Deflector ...................................8
Installing and Maintaining the Spark Arrestor ..........8
Installing Spark Arrestor ..............................................8
Maintaining Spark Arrestor ..........................................8
Adding Engine Oil and Fuel ........................................9
Engine Fluid Requirements .........................................9
Adding Engine Oil ........................................................9
Adding Fuel .................................................................9
Checking Tire Pressure .............................................10
Section 3: Operation
Operation and Use Questions ..................................11
Before Starting Engine ..............................................11
Starting the Unit .........................................................11
Stopping the Unit .......................................................12
Operating Zone ..........................................................12
Using the Chipper Chute ...........................................12
Shredder Hopper ........................................................13
Using the Collection Bag ..........................................13
Cleaning Clogged Shredder ......................................14
Section 4: Maintenance
Maintenance ...............................................................15
Maintenance Schedule ..............................................15
Changing Engine Oil ..................................................16
Greasing Wheel Bearings .........................................16
Removing and Replacing the Chipper Knife ...........17
Chipper Knife Sharpening .........................................18
Maintaining Shredder Hammers ...............................19
Flywheel Maintenance ...............................................19
Section 5: Troubleshooting
Troubleshooting .........................................................21

iv Owner’s Manual for Chipper/Shredder
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Safety Rules & General Information
Owner’s Manual for Chipper/Shredder 1
Section 1: Safety Rules & General Information
Introduction
Thank you for purchasing this Generac Chipper/
Shredder. This unit has been designed to provide high-
performance, efficient operation, and years of quality use
when maintained properly.
The Generac Chipper/Shredder is designed and built for
consistent, reliable use for chipping and shredding proj-
ects. It is built to withstand frequent handling under these
conditions.
The information in this manual is accurate based on
products produced at the time of publication. The manu-
facturer reserves the right to make technical updates,
corrections, and product revisions at any time without
notice.
Read This Manual Thoroughly
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
If any section of this manual is not understood, contact
the nearest Independent Authorized Service Dealer
(IASD) or Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or visit www.generac.com for start-
ing, operating, and servicing procedures. The owner is
responsible for proper maintenance and safe use of the
unit.
SAVE THESE INSTRUCTIONS for future reference. This
manual contains important instructions that must be fol-
lowed during placement, operation, and maintenance of
the unit and its components. Always supply this manual
to any individual that will use this unit, and instruct them
on how to correctly start, operate, and stop the unit in
case of emergency.
Safety Rules
The manufacturer cannot anticipate every possible cir-
cumstance that might involve a hazard. The alerts in this
manual, and on tags and decals affixed to the unit, are
not all inclusive. If using a procedure, work method, or
operating technique that the manufacturer does not spe-
cifically recommend, verify that it is safe for others and
does not render the equipment unsafe.
Throughout this publication, and on tags and decals
affixed to the unit, DANGER, WARNING, CAUTION, and
NOTE blocks are used to alert personnel to special
instructions about a particular operation that may be
hazardous if performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
How to Obtain Service
When the unit requires servicing or repairs, contact Gen-
erac Customer Service at 1-888-GENERAC (1-888-436-
3722) or visit www.generac.com for assistance.
When contacting Generac Customer Service about parts
and service, always supply the complete model and
serial number of the unit as given on its data decal
located on the unit. Record the model and serial numbers
in the spaces provided on the front cover of this manual.

Safety Rules & General Information
2Owner’s Manual for Chipper/Shredder
General Hazards
DANGER
Personal injury. NEVER attempt to dislodge debris
from discharge chute or hopper while unit is running.
(000508)
The cutting blades can start again at any moment, which will
result in death, serious injury, or equipment damage.
DANGER
Flying objects. Debris travels outward at a
high speed. Stand clear of the discharge chute
while unit is running. Failure to do so will
result in death or serious injury. (000510)
DANGER
Personal injury. NEVER insert body parts or metal
objects in the discharge chute or hopper for any
(000509)
reason while the unit is running. Doing so will result in death,
serious injury, property or equipment damage.
WARNING
Personal injury. Do not operate the unit with the hopper
or discharge chute removed. Doing so could cause
death, serious injury, property or equipment damage.
(000513a)
WARNING
Personal injury. Do not hold tightly to material fed into
unit. Doing so could result in death or serious injury.
(000518a)
WARNING
Personal injury. Do not lean over unit while operating. Feed
materials straight down into the hopper with arms parallel to
the ground and several inches above the opening. Failure to
do so could result in death or serious injury. (000519)
WARNING
Personal injury. Keep people and pets away from work
area. Failure to do so could result in death or serious
injury.
(000420)
WARNING
Personal injury. Only allow qualified persons to operate
unit. Operation by unqualified persons could result in
death, serious injury, property or equiment damage.
(000421)
(000377)
WARNING
Vision loss. Eye protection is required when
servicing unit. Failure to do so could result in
vision loss or serious injury.
WARNING
Personal injury and equipment damage. Do not
tamper with engine governed speed. Operating
engine too fast or slow increases the risk of injury
or permanent engine damage. (000254)
(000115)
Moving Parts. Do not wear jewelry when
starting or operating this product. Wearing
jewelry while starting or operating this product
could result in death or serious injury.
WARNING
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
WARNING
(000492)
Personal injury. Wear sturdy shoes with no-slip tread,
long pants, and gloves when operating this unit.
Failure to do so could result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
(000107)
Hearing Loss. Hearing protection is
recommended when using this machine.
Failure to wear hearing protection could
result in permanant hearing loss.
WARNING

WARNING
Personal injury. When loading up ramps, pull the unit with
the shredder hopper hand holds. When unloading down
ramps guide the machine from behind with the hand holds.
Failure to do so could result in death or serious injury.
(000687)
WARNING
(000403)
Personal injury. Never remove, alter, or tamper with safety
devices. Do not operate unit without safety equipment in
place. Doing so could result in death, serious injury, property
damage, or equipment damage.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to
service this equipment and could result in death or
serious injury. (000215)
WARNING
Personal injury. Securely fasten chipper hopper to unit
prior to use. Failure to do so could result in serious
injury, property or equipment damage.
(000517)
WARNING
Equipment damage. Do not overload unit or attempt
to chip/shred material beyond the manufacturer’s
recommendation. Doing so could result in death,
severe injury, or equipment damage. (000515)
WARNING
Equipment damage. Shut down unit immediately if
material is jammed. Failure to do so could result in
engine or equipment damage.
(000549)
CAUTION
(000419)
Personal injury. Wear appropriate personal protective
equipment at all times while operating and servicing
unit. Failure to do so could result in personal injury.
Safety Rules & General Information
Owner’s Manual for Chipper/Shredder 3
Exhaust and Fuel Hazards
(000192)
DANGER
Explosion and fire. Fuel and vapors are extremely
flammable and explosive. No leakage of fuel is
permitted. Keep fire and spark away. Failure to do
so will result in death or serious injury.
DANGER
Asphyxiation. Do not operate unit without
a properly functioning exhaust system.
Doing so will result in death or serious injury.
(000340)
(000103)
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous
gas. Carbon monoxide, if not avoided, will
result in death or serious injury.
DANGER
(000143)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Store fuel in a well
ventilated area. Keep fire and spark away. Failure to
do so will result in death or serious injury.
DANGER
(000105)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
DANGER
(000166b)
DANGER
Explosion and Fire. Do not overfill fuel tank. Fill to
1/2 inch from top of tank to allow for fuel expansion.
Overfilling may cause fuel to spill onto engine causing
fire or explosion, which will result in death or serious
injury.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
WARNING
(000281)
Fire risk. Fuel and vapors are extremely
flammable. Do not operate indoors. Doing
so could result in death, serious injury, or
property or equipment damage.

(000282)
WARNING
Explosion and fire risk. Do not smoke near unit.
Keep fire and spark away. Failure to do so could
esult in death, serious injury, or property or
equipment damage.
WARNING
Explosion and Fire. Do not smoke while
refueling unit. Failure to do so could result in
death, serious injury, or property or equipment
damage. (000284a)
Safety Rules & General Information
4Owner’s Manual for Chipper/Shredder
Fire Hazards
(000109)
WARNING
Risk of Fire. Verify machine has properly
cooled before installing cover and storing
machine. Hot surfaces could result in fire.
(000249)
WARNING
Risk of fire. Never operate engine without the
air cleaner installed. Operating engine without
the air cleaner could result in death or serious
injury.
Risk of fire. Never operate engine without the
carburetor air intake cover installed. Doing so
could result in death or serious injury.
WARNING
(000511)
(000147)
WARNING
Risk of Fire. Unit must be positioned in a
manner that prevents combustible material
accumulation underneath. Failure to do so
could result in death or serious injury.
Safety and Operating Decals
See Figure 1-1. This unit features numerous safety and operating decals. These decals provide important operating
instructions and warn of dangers and hazards. Replace damaged or missing safety and operating decals immediately.
Decal part numbers can be found in the unit parts manual at www.generac.com.
Figure 1-1. Safety and Operating Decal Locations

Owner’s Manual for Chipper/Shredder 5
General Information and Setup
Section 2: General Information and Setup
Specifications
Engine Briggs & Stratton
Ft-Lbs torque 9.5
Oil capacity 20 oz (0.59 L)
Fuel capacity 0.8 gal (3 L)
Starting Manual
Chipping capacity 3 in (7.62 cm) diameter branches
Shredding capacity .5 in (1.27 cm) diameter woody material
Chipper knife 4.123 in x 1.25 in x 0.281 in (10.48 cm x 3.2 cm x 7.14 mm)
Drive Direct Mount Flywheel/Hammermill
Wheels 9/3.5 X 4, 4 ply, pneumatic
Unit weight 126 lb (57.15 kg)
Unit dimensions 31.875 in x 26.875 in x 44.875 in (80.96 cm x 66.26 cm x 113.983 cm)
Components and Controls
A
B
C
D
H
I
JKL
M
N
O
F
G
E
010531
Figure 2-1. Component Locations
AFuel Fill FBriggs and Stratton engine KOil drain
BMuffler GThrottle LPneumatic tires
CAir filter HChoke control lever MDischarge deflector
DOil fill IFuel shut-off valve NChipper chute
EChipper chute guard JStarter handle OShredder hopper

6Owner’s Manual for Chipper/Shredder
General Information and Setup
Know Your Chipper/Shredder
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
See Figure 2-1. Be familiar with the controls and features
of the unit prior to operation. Read this manual thor-
oughly before assembling and operating this unit. Save
this manual for future and immediate reference.
Emissions
The United States Environmental Protection Agency (US
EPA) (and California Air Resources Board (CARB), for
engines/equipment certified to California standards)
requires that this engine/equipment complies with
exhaust and evaporative emissions standards. Locate
the emissions compliance decal on the engine to deter-
mine applicable standards. For emissions warranty infor-
mation, please reference the included emissions
warranty. It is important to follow the maintenance specifi-
cations in the manual to ensure that the engine complies
with the applicable emissions standards for the duration
of the product’s life.
Remove Contents from Carton
1. See Figure 2-2, Figure 2-3. Remove and verify
carton contents prior to assembly.
2. Contact Generac Customer Service at 1-888-436-
3722 (1-888-GENERAC), or www.generac.com
with the unit model and serial number for any miss-
ing carton contents.
3. Record model, serial number, and date of pur-
chase on front cover of this manual.
010532
A
D
E
C
B
G
H
F
Figure 2-2. Contents Supplied in
Item Description QTY
A9.5 Chipper w/Shredder Power Unit 1
BProduct Pack, including Safety and Operating
Instructions, Engine Manual, Hardware Bag
1
CShredder Hopper 1
DChipper Chute 1
ECollection Bag 1
FShredder Guard and Bracket Assembly 1
GChipper Guard and Bracket Assembly 1
HDischarge Deflector 1
Carton
010533
M
L
J
KN
Figure 2-3. Hardware Bag Contents
Item Description QTY
JNut, Nylon Lock, Flange, 5/16-18 12
KBolt, Hex Flange, 5/16-18 x .75" 4
LWasher .344" x .88" x .12" 4
MNut, Nylon Lock, Flange, 1/4-20 7
NScrew, Button HD Socket, 1/4-20 x 5/8” 4

Owner’s Manual for Chipper/Shredder 7
General Information and Setup
Attaching Shredder Hopper and 
Hammermill Housing
1. See Figure 2-4. Remove the two shipping nuts (A)
securing hammermill housing (B) to the power unit
using a 1/2” wrench. Discard shipping nuts.
AB
010534
Figure 2-4. Removing Shipping Nuts
2. See Figure 2-5. Position the larger end of the
shredder hopper (C) on a flat surface and set ham-
mermill housing (D) over the shredder hopper.
3. Secure hammer head housing to shredder hopper
using:
•1-1/4-20 button head screws on the inside with a 
5/32” Allen wrench.
•1-1/4-20 locknuts on the outside with a 7/16”
wrench.
NOTE: Adjust the shredder hopper and hammermill
housing while tightening the hardware to make sure the
back side of hopper (D) is flush to flange (F).
E
C
F
010535
D
Figure 2-5. Securing Hammermill Housing
4. See Figure 2-6. Position hammermill housing/
shredder hopper assembly (G) onto the studs of
flywheel housing (H).
NOTE: The shredder hopper studs pass through slots in
flywheel housing bracket (I).
G
H
I
010536
Figure 2-6. Positioning Hammermill Housing/
Shredder Hopper Assembly on Flywheel Housing
5. Verify there are no noticeable gaps between the
hammermill housing flange and flywheel housing.
NOTE: If there are gaps, remove the hammermill hous-
ing/shredder hopper assembly, loosen the hardware
installed in step 2 and adjust the hammermill housing and
shredder hopper to align better with the flywheel housing.
Retighten the hardware and reposition the hammermill
housing and shredder hopper onto the flywheel housing
studs.
6. See Figure 2-7. Secure hammermill housing/
shredder hopper assembly (J) with nine 5/16-18
flange locknuts (K) using a 1/2” wrench.
7. Install the shredder hopper guard and bracket
assembly with three 1/4-20 flange locknuts (L)
using a 7/16” wrench.
K
J
L
010537
Figure 2-7. Securing Hammermill Housing/Shredder
Hopper Assembly

8Owner’s Manual for Chipper/Shredder
General Information and Setup
Attaching Chipper Chute
WARNING
Personal injury. Do not operate the unit with the hopper
or discharge chute removed. Doing so could cause
death, serious injury, property or equipment damage.
(000513a)
NOTE: 1/4-20 bolts and locknuts are pre-installed on the
guard assembly.
1. See Figure 2-8. Using a 7/16” and 3/8” wrench,
remove a locknut (A) from one of the chipper chute
guard bolts (B), position it in chipper chute (C), and
loosely reinstall the locknut. Repeat for the second
locknut. Fully tighten both locknuts.
2. Attach the chipper chute onto the housing studs
and secure with three 5/16-18 flange locknuts (D)
using a 1/2” wrench.
B
C
A
D
010538
Figure 2-8. Attaching Chipper Chute
Attaching Discharge Deflector
1. See Figure 2-9. Secure one side of discharge
deflector (A) at the two mounting locations with 
5/16-18 x .75 bolts and washers (B) using a 1/2”
wrench.
2. Fold the discharge deflector over and attach the
other side as in step 1.
NOTE: Tighten bolts until rubber guard begins to deform.
Do not over tighten.
B
A
010538
Figure 2-9. Attaching Discharge Deflector
Installing and Maintaining the Spark
Arrestor
WARNING
Personal injury. Before performing any maintenance procedure
or inspection, stop the engine and allow all parts to cool.
Disconnect spark plug wire and keep spark plug wire away from
spark plug. Failure to do so could result in serious injury.
(000688)
Under California law, and the laws of some other states,
operating an internal combustion engine using hydrocar-
bon fuels without an engine spark arrester is not permit-
ted. This also applies to operation on US Forest Lands.
All Generac Chipper with Shredder units shipped to Cali-
fornia, New Mexico, and Washington State are provided
with spark arresters. Failure of the owner or operator to
maintain this equipment in compliance with state regula-
tions is a misdemeanor under California law and may be
in violation of other state and/or federal regulations. Con-
tact your State Park Association or the appropriate state
organization for specific information in your area.
Installing Spark Arrestor
1. See Figure 2-10. Align holes in spark arrestor (A)
with holes in the muffler (B).
2. Secure spark arrestor with screws (C) using a 
9/32” wrench or nut driver.
Maintaining Spark Arrestor
1. Remove screws securing spark arrestor to muffler
using a 9/32” wrench or nut driver.
2. Remove spark arrestor.
NOTE: The amount of carbon particulate will vary with
fuel used, air quality, engine condition, and age.
3. Clean spark arrestor screen with a soft non-metal-
lic brush.
4. Inspect screen for any tears, rips, or other damage
which will prevent the screen from operating prop-
erly. Replace spark arrestor if screen is damaged.
5. Install the new or cleaned/inspected screen with
three screws using a 9/32” wrench or nut driver.
A
C
B
010543
Figure 2-10. Attaching Discharge Deflector

Owner’s Manual for Chipper/Shredder 9
General Information and Setup
Adding Engine Oil and Fuel
Engine Fluid Requirements
Engine Oil
Above 50 °F (10 °C): SAE 30
10–90 °F (-1–32 °C): 10W-30
30 °F (-1 °C) or below: 5W-30
Fuel Unleaded gasoline. Minimum 85 octane rating.
Adding Engine Oil
WARNING
(000341)
Fire and explosion risk. Keep spark and flame
away from liquid and vapor. Do not smoke while
using. Doing so could result in death, serious
injury, or equipment damage.
(000210)
WARNING
Skin irritation. Avoid prolonged or repeated contact with
used motor oil. Used motor oil has been shown to cause
skin cancer in laboratory animals. Thoroughly wash
exposed areas with soap and water.
(000135)
Engine damage. Verify proper type and quantity of
engine oil prior to starting engine. Failure to do so
could result in engine damage.
CAUTION
IMPORTANT NOTE: The unit is shipped without oil in
engine. Traces of oil may be in reservoir from factory
testing. Oil must be added prior to initial operation.
Use only the recommended high detergent engine
oil. See Adding Engine Oil and Fuel.
1. Place unit on a firm, level surface. Verify engine is
cooled.
2. See Figure 2-11. Remove oil dipstick/fill cap (A).
A
010540
Figure 2-11. Oil Dipstick and Fuel Fill
3. Add one-half of the oil recommended by the engine
manufacturer. Wait one minute for oil to settle.
4. Check the oil level on the dipstick as described in
the engine manual.
5. Continue adding a few ounces of oil at a time,
rechecking the level until the oil reaches the full
level as indicated in the engine manual.
NOTE: Do not overfill.
6. Install oil dipstick and securely finger tighten.
Adding Fuel
(000105)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
DANGER
(000214)
DANGER
Explosion and Fire. Do not fill fuel tank past full line.
Allow for fuel expansion. Overfilling may cause fuel
to spill onto engine causing fire or explosion, which
will result in death or serious injury.
WARNING
Explosion and Fire. Do not smoke while
refueling unit. Failure to do so could result in
death, serious injury, or property or equipment
damage. (000284a)
NOTE: The unit is shipped without fuel. Fuel must be
added prior to first starting attempt.
1. Place unit on a firm, level surface. Verify engine is
cooled.
2. See Figure 2-12. Remove fuel fill cap (A).
A
010542
Figure 2-12. Fuel Fill Cap

10 Owner’s Manual for Chipper/Shredder
General Information and Setup
3. Fill tank with fresh, unleaded fuel with a minimum
85 octane rating to 1–1.5 in (25.4–38.1 mm) below
top of the fill neck to allow for fuel expansion.
NOTE: Do not overfill.
4. Install fuel fill cap. Secure tightly.
Checking Tire Pressure
WARNING
Loss of control. Do not overinflate tires. Overinflation
could cause a blow out, which could result in loss of
control. Loss of control could result in death, serious
injury, property or equipment damage. (000428)
1. See Figure 2-13. Remove valve stem protective
cap (A) and check tire pressure using a tire pres-
sure gauge.
A
010541
Figure 2-13. Valve Stem Protective Cap
2. Verify tire pressure is in accordance with recom-
mended pressure stamped on side of tire. Add or
remove air as needed.
NOTE: Do not over inflate tires.
3. Replace valve stem protective cap.

Owner’s Manual for Chipper/Shredder 11
Operation
Section 3: Operation
DANGER
Personal injury. NEVER attempt to dislodge debris
from discharge chute or hopper while unit is running.
(000508)
The cutting blades can start again at any moment, which will
result in death, serious injury, or equipment damage.
Operation and Use Questions
Call Generac Customer Service at 1-888-GENERAC (1-
888-436-3722) with questions or concerns about unit
operation and maintenance.
Before Starting Engine
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
WARNING
Equipment damage. Do not attempt to start or operate
a unit in need of repair or scheduled maintenance.
Doing so could result in serious injury, death, or
equipment failure or damage. (000291)
CAUTION
(000520)
Equipment damage. Verify hopper, chipper chute, and
discharge chute are clear of debris before starting.
Failure to do so could result in property or equipment
damage.
IMPORTANT NOTE: Unit is shipped without oil. Add
engine oil before starting. See Adding Engine Oil for
instructions.
1. Check engine oil level.
2. Check fuel level.
3. Inspect unit for damage.
4. Check tire pressure.
5. Visually inspect chipper knife for damage.
Starting the Unit
Risk of fire. Never operate engine without the
carburetor air intake cover installed. Doing so
could result in death or serious injury.
WARNING
(000511)
1. See Before Starting Engine.
2. See Figure 3-1. Set fuel shutoff valve (A) to open.
3. Inspect inlet hoppers and discharge chute.
Remove any debris buildup. See Cleaning
Clogged Shredder.
4. Set choke control lever (B) to choke. Leave in run
position if engine is already warm.
5. Set throttle control lever (C) to fast position.
6. Grasp recoil starter handle (D) and slowly pull until
resistance is felt, then pull cord rapidly to start
engine.
NOTE: The engine will usually start within one or two
pulls.
7. Move choke to the run position as engine warms
up. Wait until engine runs smoothly before making
each adjustment.
8. When engine has warmed and running smoothly,
verify choke fully in the run position and the throttle
control lever is set to fast for chipping and shred-
ding.
C
B
A
D
010541
Figure 3-1. Engine Controls

12 Owner’s Manual for Chipper/Shredder
Operation
Stopping
(000457)
Equipment damage. Never stop the engine by moving
throttle control lever to CHOKE. Doing so could result
in engine damage.
CAUTION
the Unit
NOTE: Close fuel shutoff valve when transporting or
storing unit.
Operating Zone
•See Figure 3-2. Always operate unit from the
appropriate operator zone (A).
•Always stop engine when leaving operating zone
or when moving the machine.
NOTE: When viewed from chipper chute side the fly-
wheel turns in a clockwise direction.
NOTE: Never assume you know where the chipper knife
is. You can never know where the chipper knife is.
B
A
CD
010545
Figure 3-2. Operator Zone and Discharge Area
AOperator zone CShredder hopper
BDischarge area DChipper chute
Using the Chipper Chute
The chipper chute is designed to chip thicker materials
that are not suitable for the shredder hopper. The revolv-
ing chipper knife cuts branches fed into the chute into
chips. The chipper can chip twigs and branches ranging
in size from 0.5 in - 3 in (1.27 cm - 7.62 cm) in diameter.
NOTE: Cut materials into manageable lengths before
feeding them into the chipper chute.
•The chipper is not self-feeding. Hold onto and
slowly feed material into the chipper chute. Do not
force material or allow material to be pulled too
quickly into the chipper.
•Larger diameter hardwood or extremely hard knots
may not process as well as other materials.
•Discard larger diameter or harder branch stubs
before they become too short to control their feed
rate.
•Overloading the chipper chute will cause the
engine speed to decrease. If the engine bogs
down, stop feeding material into the chipper chute
and wait until the engine returns to full speed
before continuing.
•The unit can process dry or green material.
– Green material processes quicker and easier
than dry material.
– Soft wood processes easier than hard wood.
•If the machine does not chip well, the chipper knife
may need sharpening or may need to be replaced.
•Trim off any side twigs from the main branch that
you are chipping.
•When chipping branches, sometimes a tail will
remain at the end of a branch. To avoid this, rotate
the branch while feeding it into the chipper chute.
•Rotating the branch while feeding it into the
machine improves chipping performance.
•Use caution with small diameter green saplings
and branches less than 1 in (2.54 cm) in diameter.
Chip these grouped or bundled together to provide
support for each other.
•Feed material larger than 1 in (2.54 cm) one piece
at a time into the chipper chute.
•Never allow processed material to build up within 
3 in (7.62 cm) of the discharge opening. Move the
unit or pile as needed. Failure to do so could result
in unnecessary jamming of the machine.
•Never use hands or feet to move a pile of pro-
cessed material. Shut off the engine, then use a
spade, rake, or long handle tool.
•Make sure the unit finishes processing and dis-
charging material before shutting the engine off.

Owner’s Manual for Chipper/Shredder 13
Operation
Shredder Hopper
WARNING
Personal injury. Do not lean over unit while operating. Feed
materials straight down into the hopper with arms parallel to
the ground and several inches above the opening. Failure to
do so could result in death or serious injury. (000519)
The shredder hopper can process hard wood branches
up to 0.5 in (1.27 cm) in diameter and softer organic
material up to 2.375 in (6 cm) in diameter. Most organic
materials can be shredded. Material must be pushed
past the hopper guard flap, using a branch if necessary.
•When shredding new material, initially feed only
limited quantities of the material into the shredder
hopper. If the material is processing without diffi-
culty, increase the amount and length of material.
•Do not overload the machine by feeding too much
material into the hopper at one time. If the engine
speed decreases, stop at once. Do not resume
feeding the machine until the engine has returned
to full speed.
•Several small branches can be fed into the shred-
der hopper at once providing their combined diam-
eter is less than 0.5 in (1.27 cm).
•Cut larger branches into sections smaller than 3 ft
(91 cm) before feeding them into the machine.
•Allow green/wet materials to dry before processing
or alternate processing and discharging green/wet
materials with dry materials to avoid clogging.
•If wet materials begin to clog the unit, see Clean-
ing Clogged Shredder.
Using the Collection Bag
NOTE: An optional collection bag is provided with the
unit.
1. See Figure 3-3. Install the open end of the collec-
tion bag over rubber discharge deflector (A) and
hook the collection bag onto metal housing tabs (B)
above and below the discharge deflector.
B
A
B
010546
Figure 3-3. Installing Collection Bag (1 of 2)
1. See Figure 3-4. Squeeze rope lock (C) and pull
rope (D) to cinch collection bag (E) tightly around
the housing tabs then release the rope lock
NOTE: Empty the collection bag before it is completely
full.
E
C
D
010547
Figure 3-4. Installing Collection Bag (2of 2)

14 Owner’s Manual for Chipper/Shredder
Operation
Cleaning Clogged Shredder
WARNING
Equipment damage. Shut down unit immediately if
material is jammed. Failure to do so could result in
engine or equipment damage.
(000549)
WARNING
Personal injury. Before performing any maintenance procedure
or inspection, stop the engine and allow all parts to cool.
Disconnect spark plug wire and keep spark plug wire away from
spark plug. Failure to do so could result in serious injury.
(000688)
1. Remove any material in the chipper chute and
shredder hopper with a wooden stick.
2. Check the discharge opening for clogs. Clear clogs
with a stick.
3. Start the machine and allow any remaining material
to discharge.
4. If you have been shredding wet/green materials
the clog may be near the shredder housing inlet.
Shred a wood stick of up to 1 in (2.54 cm) in diam-
eter to clear the clogged wet material.
5. If the clog does not clear repeat the above process.
6. Verify the cutting chamber is clear before trying to
process more material.

Owner’s Manual for Chipper/Shredder 15
Maintenance
Section 4: Maintenance
Maintenance
Regular maintenance will improve performance and
extend engine/equipment life. Generac Power Systems,
Inc. recommends that all maintenance work be per-
formed by an Independent Authorized Service Dealer
(IASD). Regular maintenance, replacement, or repair of
the emissions control devices and systems may be per-
formed by any repair shop or person of the owner’s
choosing. To obtain emissions control warranty service
free of charge, the work must be performed by an IASD.
See the emissions warranty.
Maintenance Schedule
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to
service this equipment and could result in death or
serious injury. (000215)
WARNING
Personal injury. Before performing any maintenance procedure
or inspection, stop the engine and allow all parts to cool.
Disconnect spark plug wire and keep spark plug wire away from
spark plug. Failure to do so could result in serious injury.
(000688)
CAUTION
(000419)
Personal injury. Wear appropriate personal protective
equipment at all times while operating and servicing
unit. Failure to do so could result in personal injury.
Table 4-1. Regular Maintenance Checklist
Procedure Before Each Use Every 25 Hours
Check engine oil level 
Inspect general equipment condition 
Check engine exterior and cooling fins 
Inspect knife for damage and sharpness 
Check knife attachment screws 
Check hammer/spacers for wear -- reverse or replace as needed 
Check air filter -- clean or replace as needed 
Check tire pressure 
Change engine oil 1st time 5 hours 
Inspect spark plug -- replace as needed 

16 Owner’s Manual for Chipper/Shredder
Maintenance
Changing Engine Oil
WARNING
(000415)
Accidental start-up. Before servicing or detangling, shut
down unit, allow to cool, remove keys, and disconnect spark
plug wire(s). Failure to do so could result in death, serious
injury, or equipment damage.
(000139)
WARNING
Risk of burns. Allow engine to cool before
draining oil or coolant. Failure to do so could
result in death or serious injury.
(000210)
WARNING
Skin irritation. Avoid prolonged or repeated contact with
used motor oil. Used motor oil has been shown to cause
skin cancer in laboratory animals. Thoroughly wash
exposed areas with soap and water.
(000135)
Engine damage. Verify proper type and quantity of
engine oil prior to starting engine. Failure to do so
could result in engine damage.
CAUTION
NOTE: Drain oil when engine is warm. Warm oil drains
more completely.
1. Set the machine on a level surface.
2. Place a suitable container under the right side of
the unit between the wheels.
3. See Figure 4-1. Remove oil fill/dipstick (A) located
on the left side of the machine.
A
010548
Figure 4-1. Engine Oil Fill Location (left side)
4. See Figure 4-2. Remove drain plug (B) with a 10
mm wrench and allow used oil to drain through
drain hole (C) and into waste container.
NOTE: Allow oil to drain completely.
B
C
010549
Figure 4-2. Engine Oil Drain Hole and Plug
(right side)
5. Install oil drain plug.
6. Fill with recommended oil. See Adding Engine
Oil.
7. Install oil dipstick/fill cap.
Greasing Wheel Bearings
1. See Figure 4-3. Wipe all dirt from grease fittings
(A) on both wheel.
A
010550
Figure 4-3. Greasing Wheel Bearings
2. Apply no more than three pumps of quality general-
purpose lithium grease with a hand-pumped
grease gun to the grease fitting on each wheel.