Homelite UT10570 User Manual
OPERATOR'S MANUAL
UT10560 / 16 in. (406 mm) 38cc Chain Saw
UT10550 / 18 in. (457 mm) 45cc Chain Saw
UT10570 / 20 in. (508 mm) 45cc Chain Saw
Your new chain saw has been engineered and manufactured to Homelite’s high standard for dependability, ease of operation,
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before using
this product.
Thank you for buying a Homelite chain saw.
SAVE THIS MANUAL FOR FUTURE REFERENCE
TABLE OF CONTENTS
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■ Introduction ..................................................................................................................................................................... 2
■■
■■
■ General Safety Rules .................................................................................................................................................. 3-4
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■■
■ Specific Safety Rules................................................................................................................................................... 4-5
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■■
■ Symbols ....................................................................................................................................................................... 6-7
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■ Specifications ................................................................................................................................................................. 7
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■ Features ......................................................................................................................................................................... 8
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■■
■ Operation ................................................................................................................................................................... 9-21
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■■
■ Maintenance ............................................................................................................................................................ 22-32
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■ Bar and Chain Combinations ........................................................................................................................................ 33
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■■
■ Troubleshooting ....................................................................................................................................................... 33-34
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■ Warranty ....................................................................................................................................................................... 35
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■ Parts Ordering/Service ................................................................................................................................................. 36
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INTRODUCTION
IMPORTANT
Servicing requires extreme care and knowledge and
should be performed only by a qualified service
technician. When servicing use only identical Homelite
replacement parts.
For safe operation, read and understand all instructions
before using the chain saw. Follow all safety
instructions. Failure to follow all safety instructions
listed below, may result in serious personal injury.
WARNING:
Carefully read through this entire operator's manual
before using your new saw. Pay close attention to
the Safety Rules and all Safety Alert Symbols
including Danger, Warning, and Caution. These
safety rules are for your safety and to prevent
possible serious injury. If you use your saw properly
and only for what it is intended, you will enjoy years
of safe, reliable service.
Look for this symbol to point out important safety precautions.
It means attention!!! Your safety is involved.
WARNING:
The operation of any power tool can result in foreign objects being thrown into your eyes, which
can result in severe eye damage. Before beginning tool operation, always wear safety goggles or
safety glasses with side shields and a full face shield when needed. We recommend Wide Vision
Safety Mask for use over eyeglasses or standard safety glasses with side shields. Always wear eye
protection which is marked to comply with ANSI Z87.1.
Page 2
GENERAL SAFETY RULES
WARNING:
The warnings, labels, and instructions found in this
section of the operator's manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
Safe operation of this tool requires that you read and
understand this operator's manual and all labels affixed to
the tool. Safety is a combination of using common sense,
staying alert, and knowing how your saw works.
READ ALL INSTRUCTIONS
■■
■ KNOW YOUR TOOL. Read the operator's manual
■■
carefully. Learn the saw's applications and limitations
as well as the specific potential hazards related to this
tool.
■■
■ KICKBACK MAY OCCUR WHEN THE NOSE OR TIP
■■
OF THE GUIDE BAR touches an object or when the
wood closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a lightning-fast
reverse reaction kicking the guide bar up and back
toward the operator. Pinching the saw chain along the
top of the guide bar may push the guide bar rapidly
back toward the operator. Either of these reactions may
cause you to lose control of the saw which could result
in serious personal injury. DO NOT rely exclusively
upon the safety devices built into your saw. As a chain
saw user, you should take several steps to keep your
cutting jobs free from accident or injury.
1. With a basic understanding of kickback, you can
reduce or eliminate the element of surprise. Sudden
surprise contributes to accidents.
2. Keep a good firm grip on the saw with both hands
when the engine is running. Place your right hand
on the rear handle and your left hand on the front
handle with your thumbs and fingers encircling the
chain saw handles. A firm grip together with a stiff
left arm will help you maintain control of the saw if
kickback occurs.
3. Make sure that the area in which you are cutting is
free from obstructions. DO NOT let the nose of the
guide bar contact a log, branch, fence, or any other
obstruction that could be hit while you are operating
the saw.
4. Cut at high engine speeds. Always cut with the
engine running at full speed. Fully squeeze the
throttle trigger and maintain a steady cutting speed.
5. Do not overreach or cut above chest height.
6. Follow the manufacturer's sharpening and
maintenance instructions for the saw chain.
7. Only use replacement bars and chains specified by
the manufacturer or the equivalent.
■■
■ DO NOT OPERATE A CHAIN SAW WITH ONE
■■
HAND. Serious injury to the operator, helpers,
bystanders, or any combination of these persons may
result from one-handed operation. A chain saw is
intended for two-handed use.
■■
■ DO NOT OPERATE A CHAIN SAW WHEN YOU ARE
■■
FATIGUED. Never operate a chain saw when you are
tired or under the influence of medication, drugs, or
alcohol.
■■
■ USE SAFETY FOOTWEAR. Wear snug-fitting clothing,
■■
protective gloves, and eye, hearing, and head
protection devices.
■■
■ DO NOT STAND ON ANY UNSTABLE SURFACE
■■
while using your chain saw, that includes ladders,
scaffolds, trees, etc.
■■
■ USE CAUTION WHEN HANDLING FUEL. Move the
■■
chain saw at least 30 feet (9 m) from the fueling point
before starting the engine.
■■
■ DO NOT ALLOW OTHER PERSONS to be near the
■■
chain saw when starting or cutting with the chain saw.
Keep bystanders and animals out of the work area.
■■
■ DO NOT START CUTTING until you have a clear work
■■
area, secure footing, and a planned retreat path from
the falling tree.
■ KEEP ALL PARTS OF YOUR BODY away from the
saw chain when the engine is running.
■■
■ ALWAYS CARRY THE CHAIN SAW WITH THE
■■
ENGINE STOPPED AND THE BRAKE ENGAGED,
the guide bar and saw chain to the rear, and the
muffler away from your body. When transporting the
chain saw, use the appropriate guide bar scabbard.
■■
■ DO NOT OPERATE A CHAIN SAW THAT IS
■■
DAMAGED, improperly adjusted, or not completely and
securely assembled. Be sure that the saw chain stops
moving when the throttle control trigger is released.
■■
■ SHUT OFF THE ENGINE before setting the chain saw
■■
down. DO NOT leave the engine running unattended.
As an additional safety precaution, apply the chain
brake prior to setting down the saw.
■■
■ USE EXTREME CAUTION when cutting small-size
■■
brush and saplings because slender material may
catch the saw chain and be whipped toward you or pull
you off balance.
■■
■ WHEN CUTTING A LIMB that is under tension, be
■■
alert for springback so that you will not be struck when
the tension in the wood fibers is released.
■■
■ KEEP THE HANDLES dry, clean, and free of oil or fuel
■■
mixture.
■■
■ OPERATE THE CHAIN SAW ONLY in well-ventilated
■■
areas.
■■
■ DO NOT OPERATE A CHAIN SAW IN A TREE unless
■■
you have been specifically trained to do so.
Page 3
GENERAL SAFETY RULES
■■
■ ALL CHAIN SAW SERVICE, other than the items
■■
listed in the instruction manual and all maintenance,
should be performed by competent chain saw service
personnel. (For example, if improper tools are used to
remove the flywheel or if an improper tool is used to
hold the flywheel in order to remove the clutch,
structural damage to the flywheel could occur and
subsequently could cause the flywheel to burst.)
■■
■ KEEP SAFE-T-TIP ANTI-KICKBACK NOSE GUARD
■■
properly mounted on the guide bar to prevent rotational
kickback.
SPECIFIC SAFETY RULES
WARNING:
The warnings, labels, and instructions found in this
section of the operator's manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
GENERAL PRECAUTIONS
■■
■ DO NOT CUT VINES and/or small underbrush (less
■■
than 3 in./76 mm in diameter).
■■
■ MUFFLER SURFACES ARE VERY HOT during and
■■
after operation of the chain saw; keep all body parts
away from the muffler. Serious burns may occur if
contact is made with the muffler.
■■
■ Always hold the chain saw with both hands when the
■■
engine is running. Use a firm grip with thumbs and
fingers encircling the chain saw handles.
■■
■ Never let anyone use your chain saw who has not
■■
received adequate instructions in its proper use. This
applies to rentals as well as privately owned saws.
■■
■ Before you start the engine, make sure the saw chain is
■■
not contacting any object.
■■
■ Operate the chain saw only in well ventilated areas.
■■
SAFETY APPAREL
■■
■ Wear snug fitting clothing. Always wear heavy, long
■■
pants, boots, and gloves. Do not wear jewelry, short
pants, sandals, or go barefoot. Do not wear loose fitting
clothing, which could be drawn into the engine or catch
the chain or underbrush. Wear overalls, jeans, or chaps
made of cut resistant material or ones that contain cut
resistant inserts. Secure hair so that it is above shoulder level.
■■
■ Wear non-slip safety footwear and heavy-duty gloves to
■■
improve your grip and to protect your hands.
■■
■ FOLLOW THE SHARPENING and maintenance
■■
instructions for the saw chain.
■■
■ USE ONLY THE REPLACEMENT GUIDE BARS and
■■
low kickback chains specified for your saw.
■■
■ DO NOT adapt your powerhead to a bow guide or use it
■■
to power any attachments or devices not listed for your
saw.
■■
■ SAVE THESE INSTRUCTIONS. Refer to them fre-
■■
quently and use to instruct other users. If you loan
someone this tool, loan them these instructions also.
■■
■ Wear eye protection which is marked to comply with
■■
ANSI Z87.1, as well as, hearing and head protection
when operating this equipment.
REFUELING (DO NOT SMOKE!)
■ To reduce the risk of fire and burn injury, handle fuel
with care. It is highly flammable.
■■
■ Mix and store fuel in a container approved for gasoline.
■■
■■
■ Mix fuel outdoors where there are no sparks or flames.
■■
■■
■ Select bare ground, stop the engine, and allow it to
■■
cool before refueling.
■■
■ Loosen the fuel cap slowly to release pressure and to
■■
keep fuel from escaping around the cap.
■■
■ Tighten the fuel cap securely after refueling.
■■
■■
■ Wipe spilled fuel from the unit. Move 30 feet (9 m)
■■
away from refueling site before starting engine.
■■
■ Never attempt to burn off spilled fuel under any circum-
■■
stances.
CUTTING/WORK AREA
■■
■ Do not operate a chain saw in a tree.
■■
■■
■ Do not cut from a ladder, this is extremely dangerous.
■■
■■
■ Keep bystanders and animals out of the work area. Do
■■
not allow other persons to be nearby during starting or
cutting with the chain saw.
Note: The size of the work area depends on the job
being performed as well as the size tree or workpiece
involved. For example, felling a tree requires a larger
work area than making other cuts (i.e., bucking cuts,
etc.).
Page 4
SPECIFIC SAFETY RULES
PUSH AND PULL
See Figure 1.
The reaction force is always opposite to the direction the
chain is moving. Thus, the operator must be ready to
control the PULL when cutting on the bottom edge of the
bar and the PUSH when cutting along the top edge.
PULL
PUSH
Fig. 1
MAINTENANCE PRECAUTIONS
Never operate a chain saw that is damaged, improperly
adjusted, or is not completely and securely assembled. Be
sure that the saw chain stops moving when the throttle
control trigger is released. If the saw chain moves at idle
speed, the carburetor may need adjusting. Refer to
“Operation” later in this manual. If the saw chain still
moves at idle speed after adjustment has been made,
contact a Homelite Service Center for adjustment and
discontinue use until the repair is made.
WARNING:
All chain saw service, other than items in the operator's
manual maintenance instructions, should be performed
by competent chain saw service personnel. If improper
tools are used to remove the flywheel or clutch, or if an
improper tool is used to hold the flywheel in order to
remove the clutch, structural damage to the flywheel
could occur which could subsequently cause the
flywheel to burst and serious injury could result.
KICKBACK
Kickback is a dangerous reaction that can lead to serious
injury. Do not rely only on the safety devices provided
with your saw. As a chain saw user, you must take
special safety precautions to help keep your cutting jobs
free from accident or injury.
Note: See the "Operation" section later in this manual for
added information on kickback and how to avoid serious
personal injury.
Note: Your chain saw has been fully factory tested. It is
normal to find some slight oil residue on the saw.
Page 5
SYMBOLS
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper
interpretation of these symbols will allow you to operate the tool better and safer.
SYMBOL NAME EXPLANATION
Safety Alert Symbol
Read Your Operator’s Manual
Eye, Hearing, and Head Protection
SAFE-T-TIP® Nose Guard
No Smoking
Prohibited Symbol
Indicates danger, warning or caution. It means
attention!!! Your safety is involved.
Your manual contains special messages to bring
attention to potential safety concerns, machine damage
as well as helpful operating and servicing information.
Please read all the information carefully to avoid injury
and machine damage.
Wear eye, hearing, and head protection when operating
this equipment.
The SAFE-T-TIP
prevent kickback.
No smoking, sparks, or open flame.
Diagonal line across a symbol means this is prohibited
or should be avoided.
®
nose guard on the guide bar helps
Operate with Two Hands
One Handed
Carbon Monoxide
Kickback
Bar Nose Contact
Gloves
Hold and operate the saw properly with both hands.
Do not operate the saw using only one hand.
Engines produce carbon monoxide which is an odorless,
deadly poison. Do not operate in an enclosed area.
Danger – beware of kickback.
Avoid bar nose contact.
Wear non-slip gloves.
Page 6
SYMBOLS
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and the
explanations with them, deserve your careful attention and understanding. The safety warnings do not by themselves
eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention
measures.
Symbol Meaning
DANGER: Indicates an imminently hazardous situation, which, if not avoided, will result in death or
serious injury.
WARNING: Indicates a potentially hazardous situation, which, if not avoided, could result in death or
serious injury.
CAUTION: Indicates a potentially hazardous situation, which, if not avoided, may result in minor or
moderate injury. It may also be used to alert against unsafe practices that may cause property damage.
Note: Advises you of additional information concerning the operation or maintenance of the equipment.
SAVE THESE INSTRUCTIONS
SPECIFICATIONS
UT10550
Weight - No bar, chain, fuel or oil ........... 9.7 lbs. (4.4 kg)
Fuel tank volume .................................... 19.4 oz. (575 ml)
Chain oil tank volume ............................. 11.8 oz. (350 ml)
Bar length ................................................. 18 in. (457 mm)
Chain pitch .............................................. .325 in (8.3 mm)
Chain gauge ......................................... .050 in. (1.25 mm)
UT10570
Weight - No bar, chain, fuel or oil ........... 9.7 lbs. (4.4 kg)
Fuel tank volume .................................... 19.4 oz. (575 ml)
Chain oil tank volume ............................. 11.8 oz. (350 ml)
Bar length ................................................. 20 in. (508 mm)
Chain pitch .............................................. .325 in (8.3 mm)
Chain gauge ......................................... .050 in. (1.25 mm)
Drive sprocket ........................................................ 7-tooth
Engine displacement ............................. 2.75 cu. in. (45cc)
Maximum engine power ......... 2.5HP/1.9KW (9,000 RPM)
Idle engine speed ................................ 2,600 - 3,400 RPM
Fuel tank capacity .................................. 19.4 oz. (575 ml)
Oil tank capacity..................................... 11.8 oz. (350 ml)
Drive sprocket ........................................................ 7-tooth
Engine displacement ............................. 2.75 cu. in. (45cc)
Maximum engine power ......... 2.5HP/1.9KW (9,000 RPM)
Idle engine speed ................................ 2,600 - 3,400 RPM
Fuel tank capacity .................................. 19.4 oz. (575 ml)
Oil tank capacity..................................... 11.8 oz. (350 ml)
UT10560
Weight - No bar, chain, fuel or oil ........... 9.7 lbs. (4.4 kg)
Fuel tank volume .................................... 19.4 oz. (575 ml)
Chain oil tank volume ............................. 11.8 oz. (350 ml)
Bar length ............................................... 16. in. (406 mm)
Chain pitch .......................................... ..0.325 in (8.3 mm)
Chain gauge ......................................... .050 in. (1.25 mm)
Drive sprocket ........................................................ 7-tooth
Engine displacement ............................. 2.75 cu. in. (45cc)
Maximum engine power ......... 2.5HP/1.9KW (9,000 RPM)
Idle engine speed ................................ 2,600 - 3,400 RPM
Fuel tank capacity .................................. 19.4 oz. (575 ml)
Oil tank capacity..................................... 11.8 oz. (350 ml)
Page 7
FEATURES
TRIGGER
RELEASE
CYLINDER
COVER
PRIMER BULB
FRONT
HANDLE
FRONT HAND
GUARD/CHAIN
BRAKE
CHOKE LEVER
STARTER
GRIP
BAR MOUNTING
NUTS
CHAIN OIL
CAP
SAFE-T-TIP
®
STARTER/FAN
HOUSING
IGNITION
SWITCH
Page 8
FUEL CAP
STOP
THROTTLE
TRIGGER
REAR
HANDLE
Fig. 2
OPERATION
WARNING:
The warnings and instructions in this section of the
operator's manual are for your safety and to prevent
serious personal injury.
pushed toward the bar, the chain should stop immediately. A chain brake does not prevent kickback. The chain
brake should be cleaned and tested before each use.
Refer to “Operation- Operating the Chain Brake” later in
this manual for additional information.
UNDERSTANDING YOUR CHAIN SAW
SAFETY DEVICES
SAFE-T-TIP® ANTI-KICKBACK NOSE GUARD
See Figure 3.
The SAFE-T-TIP® prevents kickback because it covers the
tip of the bar where rotational kickback is generated.
Inexperienced persons should never attempt to cut when
the SAFE-T-TIP® has been removed from the bar tip.
SAFE-T-TIP
Users, such as professional loggers who need to draw the
tip through the cut, make boring cuts, or cut logs bigger
than the bar length, should reinstall the SAFE-T-TIP® as
soon as those cuts are complete. When cutting without
the SAFE-T-TIP®, the user must use proper techniques as
shown in the manual to avoid kickback.
Note: Refer to “Maintenance” later in this manual for
instructions on reinstalling the SAFE-T-TIP nose guard.
®
Fig. 3
LOW KICKBACK SAW CHAIN
The rakers (depth gauges) ahead of each cutter can
minimize the force of a kickback reaction by preventing
the cutters from digging in too deeply at the kickback
zone. Only use replacement chain that is equivalent to
the original chain or has been certified as a low kickback
chain.
As saw chains are sharpened, they lose some of the low
kickback qualities and extra caution is required.
GUIDE BARS
Generally, guide bars with small radius tips have somewhat lower kickback potentials.
When making a replacement, be sure to order one of the
Homelite bars listed for your saw in this operator's
manual. The proper size SAFE-T-TIP® nose guard comes
installed on the bar. Use only guide bars that have a
provision for mounting the SAFE-T-TIP®.
CHAIN BRAKE
See Figures 4 and 5.
Chain brakes are designed to quickly stop the chain from
rotating. When the chain brake lever/hand guard is
WARNING:
Even with daily cleaning of the mechanism, the
dependability of a chain brake to perform under field
conditions cannot be certified. Keep the SAFE-TTIP® nose guard on your saw's guide bar and use
proper cutting techniques.
RUN POSITION
Fig. 4
BRAKE
POSITION
Fig. 5
WARNING:
KICKBACK
an object at the upper portion of the tip of the guide
bar or when the wood closes in and pinches the saw
chain in the cut. Contact at the upper portion of the
tip of the guide bar can cause the chain to dig into
the object and stop the chain for an instant. The
result is a lightning fast, reverse reaction which
kicks the guide bar up and back toward the
operator. If the saw chain is pinched along the top of
the guide bar, the guide bar can be driven rapidly
back toward the operator. Either of these reactions
can cause loss of saw control which can result in
serious injury.
Do not rely exclusively upon the safety devices built
into your saw. As a chain saw user, you should take
several steps to keep your cutting jobs free from
accident or injury.
occurs when the moving chain contacts
Page 9
OPERATION
KICKBACK PRECAUTIONS
See Figures 6 and 7.
Rotational kickback occurs when the moving chain contacts an object at the Kickback Danger Zone of the guide
bar. The result is a lightning fast, reverse reaction which
kicks the guide bar up and back towards the operator. This
reaction can cause loss of control which can result in
serious injury.
KICKBACK DANGER
ZONE
Fig. 6
ROTATIONAL
KICKBACK
■■
■ Keep gasoline and oil away from the eyes. If gasoline
■■
or oil comes in contact with the eyes, wash them
immediately with clean water. If irritation is still present,
see a doctor immediately.
■■
■ Clean up spilled fuel immediately.
■■
MIXING THE FUEL
■■
■ This product is powered by a 2-cycle engine and
■■
requires pre-mixing gasoline and 2-cycle oil. Pre-mix
unleaded gasoline and 2-cycle engine oil in a clean
container approved for gasoline.
■■
■ This engine is certified to operate on unleaded gasoline
■■
intended for automotive use with an octane rating of 87
([R + M] / 2) or higher.
■■
■ Do not use any type of pre-mixed gasoline/oil from fuel
■■
service stations, this includes the pre-mixed gasoline/oil
intended for use in mopeds, motorcycles, etc.
■■
■ Use a high quality 2-cycle self-mixing oil for air-cooled
■■
engines. DO NOT use automotive oil or 2-cycle outboard oil.
■■
■ Mix 2% oil into the gasoline. This is a 50:1 ratio.
■■
■■
■ Mix the fuel thoroughly and each time before fueling.
■■
■■
■ Mix in small quantities. Do not mix quantities larger
■■
than usable in a 30-day period. A 2-cycle oil containing
a fuel stabilizer is recommended.
Fig. 7
WARNING:
Always shut off engine before fueling. Never add fuel
to a machine with a running or hot engine. Move at
least 30 ft. (9 m) from refueling site before starting
the engine. DO NOT SMOKE! Failure to heed this
warning can result in possible personal injury.
FUEL AND REFUELING
HANDLING THE FUEL SAFELY
See Figure 8.
WARNING:
Check for fuel leaks, if any are found, correct them
before using the saw to prevent fire or burn injury.
50:1
GAS
FILLING THE TANK
See Figure 8.
Refer to “Specific Safety Rules – Refueling” earlier in this
manual for additional safety information.
1. Clean the surface around fuel cap to prevent contamination.
2. Loosen the fuel cap slowly.
3. Carefully pour the fuel mixture into the tank. Avoid
spillage.
4. Prior to replacing the fuel cap, clean and inspect the
gasket.
5. Immediately replace the fuel cap and hand tighten.
Wipe up any fuel spillage.
Note: It is normal for the engine to emit smoke during
and after the first use.
GAS
OILOIL
OILOIL
50:1
FUEL
FUEL
MIX
MIX
■■
■ Always handle fuel with care, it is highly flammable.
■■
■■
■ Always refuel outdoors and do not inhale fuel vapors.
■■
■■
■ Do not let gasoline or oil come in contact with skin.
■■
Page 10
1 Quart + .67 oz. =
2 Quart + 1.35 oz. =
3 Quart + 2.0 oz. =
4 Quart + 2.7 oz. =
5 Quart + 3.38 oz. =
50:1
}
OPERATION
STOP
Fig. 8
ADDING OIL
See Figures 9 and 10.
Use HOMELITE Bar and Chain Oil. It is designed for
chains and chain oilers, and is formulated to perform over
a wide temperature range with no dilution required. Chain
saw should use approximately one tank of oil per tank of
fuel.
Note: Do not use dirty, used or otherwise contaminated
oils. Damage may occur to the oil pump, bar, or chain.
1. Carefully pour the bar and chain oil into the tank.
2. Fill the oil tank every time you fuel the engine.
OPERATING THE CHAIN BRAKE
See Figures 10, 11 and 12.
Refer to “Safety” earlier in this manual for additional
information.
Check the operating condition of the chain brake prior to
each use.
1. Using the back of your left hand, engage the chain
brake by pushing the chain brake lever/hand guard
toward the bar while the chain is rotating rapidly.
2. Reset the chain brake back into the RUN position by
grasping the top of the chain brake lever/hand guard
and pull toward the front handle until you hear a click.
WARNING:
If the chain brake does not stop the chain
immediately, take the saw to a Homelite Service
Center for repair prior to use.
BRAKE POSITION
Fig. 9
Fig. 10
Fig. 11
RUN POSITION
Fig. 12
Page 11
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