450
Table of contents
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Operator’s Manual
Read these instructions carefully and make sure
you understand them before using the 450.
Manuel d’utilisation
Veuillez lire attentivement ces instructions et assurez-vous de
bien les comprendre avant d’utiliser la machine modèle 450.
Manual
del operador
Lea cuidadosamente estas instrucciones y asegúrese
de que las comprende bien antes de usar el 450.
450
CONTENTS
Content Page
Table of contents ………………………….. 2
Unpacking .................................................. 2
Transporting ............................................... 2
Sound Data ................................................ 2
Introduction, personal safety ...................... 3
Registration of the product ………………… 4
General safety message ............................ 4
Safety warnings ......................................... 5
Excel series blades ................................... 6
Blade and skid plate installation ................ 6
What is what? ............................................ 7
Operating instructions ............................... 8
Fuel and fuel safety warnings …….…….... 9
Recommended fuels ................................. 9
Recommended oils …….......……….…..… 9
Maintenance .............................................. 10
Sawing contraction joints …………....….… 11
Maximizing the Soff-Cut system .......…..... 12
Troubleshooting ......................................... 13
Technical specications ............................. 14
Conformity certicates ............................... 14
Warranty .................................................... 15
Your 450 saw has been shipped from the factory thoroughly
inspected. Only minimal assembly is required to start using the
saw. Remove the saw from the container using proper lifting
techniques. Discard or recycle the packing material per your
regional laws. In your container will be the 450 saw, blade
shaft wrench, an owner’s manual, an engine owner’s manual,
a part list, a warranty card, a joint protector sample pack, a
diamond blade, a skid plate, and a ramp for unloading the saw.
Raise the saw to its full height by pressing down on the handle
bar. Place the unloading ramp at the edge of the container and
roll the saw out of the container. Lower the saw by pressing
down on the handle bar and squeezing the lever on the handle
bar.
CAUTION
Only use the center of the handle or the
handle bar when lifting the 450.
The 450 saw weights approximately 139 pounds (63 kilo-
grams) when ready to use . Use safe lifting practices when
handling the saw. Always remove the diamond blade when
transporting the saw. Always transport the saw with a skid
plate installed. Raise the guide arm to the back position.
Loosen the handle locking knob and fold the handle forward.
Tighten the handle locking knob and make sure the handle is
locked in the keyways. The saw can be lifted from the center of
the handle. If two (2) people are lifting the saw, use the handle
bar and lift with two hands on each side of the saw. Always
store and transport the saw in a completely lowered position
and secured from moving.
UNPACKING
2
TRANSPORTING
According to Standard ISO 3744:1998 and Directive 2000/14/
EC for environmental sound level and according to Standard
ISO 11201:1995 for sound level at the operator’s position, the
450 saw emits the following:
Sound power level Lwa 102 dB (A)
Sound pressure level Lpa 86 dB (A)
SOUND DATA
WARNING
Always wear safety approved hearing protection.
Handle bar
Lifting point
Handle locking knob
Lifting point
Blade release lever
INTRODUCTION
Common sense:
The focus of this manual is HOW to operate and service the equipment safely.
It is not possible to cover every conceivable situation you can face when using this equipment. Therefore use this
product only in a manner described in this manual. Operation or handling the machine in any other manner can
lead to serious injury or death.
If a situation is not described in this manual it should be considered dangerous - and not be done.
If you are unfamiliar with this product make sure that you carefully understand how it functions and practice all
operations and handling before putting the machine to use. Familiarize yourself in the presence of an experienced
operator. Avoid all situations that are beyond your capability.
If you still feel uncertain about the operating procedures after reading these instructions DO NOT operate the
machine until you have consulted an experienced operator.
If you have further questions you can contact the closest Husqvarna Construction Products location by writing or
calling, see information below. You can also nd the closest location by searching the internet at;
www.husqvarnacp.com . Husqvarna Construction Products will willingly be of service and provide you with advice
as well as help you to use your product both efciently and safely.
Additional manuals are available at NO CHARGE and can also be obtained on the internet site.
Husqvarna Construction Products
265 Radio Road
Corona, California 92879
USA
Toll Free no: 800 776 3328 (USA & Canada)
Phone no: 951 272 2330
Telefax no: 951 272 2338
Internet Site: www.husqvarnacp.com
PERSONAL SAFETY EQUIPMENT
When working and operating the saw the following
approved personal safety items should be used:
Head
Protection
Hearing
Protection
Eye
Protection
Safety
Shoes
Protective
Gloves
The 450 is designed as a residential and light commercial Ultra Early Entry concrete saw. The pat-
ented Soff-Cut Ultra Early Entry dry cutting system controls random cracking of concrete through the early
timing of the saw cutting usually within one to two hours after nishing process is completed. The patented
low noise and low dust blade block and skid plate technology in conjunction with the Husqvarna blades al-
lows for Ultra Early Entry sawing the same day while minimizing chipping and spalling. The saw is a manual
push style with manual controls for all functions.
3
4
REGISTER THE PRODUCT
Please register your new 450 with Husqvarna Construction Products by mailing
in the registration card that came with the machine or you can register on the internet site
www.husqvarnawarranty.com
Registration will allow us to contact in case of any critical updates or recalls on this machine.
Warranty registration has also been found to be helpful in tracing stolen equipment.
Record the following information for your records:
PURCHASE DATE: ________________
MODEL No: ________________ SERIAL No: __________________
ENGINE MODEL: _____________ ENGINE TYPE: ______________ ENGINE CODE: ________________
The 450 model and serial number as well as the engine model number, engine type and code are critical in order to
obtain the correct service parts.
SAFETY HAZARDS
CAUTION
HEARING HAZARD
During the normal use of this
machine, operator may be
exposed to a noise level equal
to or higher than 85 dB(A). Use
hearing protection.
WARNING
ASPHYXIATION HAZARD
Running an engine in a con-
ned or badly ventilated area
can result in injury or death due
to asphyxiation or carbon
monoxide poisoning.
WARNING
CALIFORNIA PROP 65
Use of this product can expose
you to materials known to the
State of California to cause
cancer and/or birth defects or
other reproductive harm.
WARNING
DO NOT MODIFY THE PRODUCT
Under no circumstances may the design of the machine be modied without the permission of the manu-
facturer. Always use genuine accessories. Unauthorized modications and/or accessories can result in
serious personal injury or the death of the operator or others. Your warranty may not cover damage or
liability caused by the use of unauthorized accessories or replacement parts.
SAFETY DEFINITIONS
In this manual a Safety Alert Symbol followed by the signal words WARNING and CAUTION are used to
identify safety information about hazards which can result in death, serious injury and/or property damage.
These signal words mean:
WARNING indicates a hazard which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazard which, if not avoided, might result in minor or moderate injury.
NOTICE indicates a message not related to personal injury.
5
SAFETY WARNINGS
WARNING
Failure to comply with the following warnings could
result in serious bodily injury or death!
PERSONAL SAFETY
• Read and understand instructions before operating saw.
• Always wear safety approved hearing, eye, head and
respiratory protection.
• Wear boots with non-slip soles to provide proper footing.
Steel-toed safety boots are recommended.
• Wear rubber work gloves to avoid contact with wet concrete
which can cause serious skin irritation.
• Know how to stop the saw quickly in case of emergency.
• Keep all parts of your body away from blade and other
moving parts. Do not wear loose clothing or jewelry which
can be caught in moving parts. Wear protective hair covering
to contain long hair.
• Use caution when loading and unloading saw.
• Stay alert. Maintain awareness of saw operation. Use
common sense. Do not operate saw when tired or after
consumption of any substance that would impair physical
function or rational judgment.
• Do not over reach. Keep proper footing and balance.
WORK AREA SAFETY
• Never operate the saw in any application or job where you
are not trained or supervised.
• Keep visitors, children and animals out of the work area.
• Observe all safety regulations for the safe handling of fuel.
Gasoline is extremely ammable and its vapors can explode
if ignited. Do not refuel indoors or in poorly ventilated areas.
Handle fuel in safety containers. Shut off the engine and
allow it to cool before refueling. Wipe the saw dry if fuel is
spilled on it. Always move away from the fueling area before
starting the engine. Do not smoke while refueling.
• Do not operate the saw while smoking or near an open ame.
• Do not operate the saw in areas of combustible material or
fumes. Sparks may occur from the saw that could cause a
re or explosion.
• Operate only in well ventilated areas. Engine exhaust contain
carbon monoxide which can cause loss of consciousness and
possible death.
• The mufer and engine become very hot during operation.
Keep all body parts and foreign material away from the
engine while running.
• Avoid dangerous environments. Do not expose saw to rain.
Keep work area well lit and clean.
SAW SAFETY
• Do not leave saw unattended while the engine is running.
• Do not alter the saw. Any alteration or modication is misuse
and may result in a dangerous condition.
• All safety guards must be in place before starting the engine.
• Only operate the saw from behind the machine with both
hands on the handle.
• Do not use damaged equipment, blades, guards or personal
protection equipment. Do not disable safety equipment or kill
switches.
• Do not operate the saw if there is a fuel leak.
• Use extreme caution when maneuvering the saw on ramps
or loading and unloading from trucks or trailers.
• Use only Husqvarna Construction Products replacement
parts. Use of unauthorized parts may create a danger.
• Do not use the saw as vehicle for transporting personnel or
equipment.
• Remove the ignition cable from the spark plug before
performing saw maintenance or changing blades to prevent
accidental engine starting.
• Remove all wrenches from the saw before starting.
• Never stand on the saw.
• When the saw is not in use or transporting, remove the blade
and lower the saw completely. Properly secure the saw to
prevent accidental movement.
BLADE SAFETY
• Examine cutting blades before each use. Do not use any
blades that has cracks, nicks, or aws. Tri-arbor hole should
be undamaged. Use only dry cut, steel centered, tri-arbor
diamond blades made for cutting green concrete.
• Husqvarna Excel Series diamond blades are designed to
only cut green concrete. Cutting any other material may result
in blade failure or a dangerous condition.
• Inspect blade anges for damage, excessive wear and
cleanliness before mounting the blade. The blade should t
snugly on clean, undamaged, tri-arbor shaft.
• Use only Husqvarna Excel Series blades or blades marked
with a maximum operating speed greater than 3200 rpm.
• Never operate the saw without the blade block assembly
securely in place including blade cover, lexan shields and
skid plate installed in working order. A damaged blade block
assembly must be replaced to protect the operator.
• Make sure the blade does not make contact with the ground
or any other surface when maneuvering the saw.
• Avoid getting in direct line with the blade or contacting the
blade while it is rotating.
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