INSTRUCTION MANUAL
Electric Chain Saw
UC3050A
UC3550A
UC4050A
UC4550A
UC3051A
UC3551A
UC4051A
UC4551A
014371
DOUBLE INSULATION
IMPORTANT: Read Before Using.
1
GEA005-3
Personal safety
11. Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
General Power Tool Safety
Warnings
WARNING Read all safety warnings and all
instructions. Failure to follow the warnings and
instructions may result in electric shock, fire and/or
serious injury.
the influence of drugs, alcohol or medication.
A
moment of inattention while operating power tools
may result in serious personal injury.
12. Use personal protective equipment. Always
wear eye protection. Protective equipment such
as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions
will reduce personal injuries.
13. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools
with your finger on the switch or energising power
tools that have the switch on invites accidents.
14. Remove any adjusting key or wrench before
turning the power tool on. A wrench or a key
left attached to a rotating part of the power tool
may result in personal injury.
15. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
16. Dress properly. Do not wear loose clothing or
jewellery. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewellery
or long hair can be caught in moving parts.
17. If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
Power tool use and care
18. Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer at the
rate for which it was designed.
19. Do not use the power tool if the switch does
not turn it on and off. Any power tool that
cannot be controlled with the switch is dangerous
and must be repaired.
20. Disconnect the plug from the power source and/or
the battery pack from the power tool before making
any adjustments, changing accessories, or storing
power tools. Such preventive safety measures reduce
the risk of starting the power tool accidentally.
Save all warnings and
instructions for future reference.
The term "power tool" in the warnings refers to your
mains-operated (corded) power tool or battery-operated
(cordless) power tool.
Work area safety
1.
Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
2.
Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
Keep children and bystanders away while
operating a power tool. Distractions can cause
you to lose control.
3.
Electrical safety
4.
Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any
adapter plugs with earthed (grounded) power
tools. Unmodified plugs and matching outlets will
reduce risk of electric shock.
5.
Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of
electric shock if your body is earthed or grounded.
Do not expose power tools to rain or wet
6.
7.
conditions. Water entering
a
power tool will
increase the risk of electric shock.
Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges or
moving parts. Damaged or entangled cords
increase the risk of electric shock.
8.
9.
When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use
of a cord suitable for outdoor use reduces the risk
of electric shock.
If operating a power tool in a damp location is
unavoidable, use a residual current device
(RCD) protected supply. Use of an RCD
reduces the risk of electric shock.
21. Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions to
operate the power tool. Power tools are
dangerous in the hands of untrained users.
22. Maintain power tools. Check for misalignment or
binding of moving parts, breakage of parts and
any other condition that may affect the power
10. Use of power supply via a RCD with a rated
residual current of 30mA or less is always
recommended.
3
tool’s operation. If damaged, have the power tool
repaired before use. Many accidents are caused by
poorly maintained power tools.
7.
When cutting a limb that is under tension be
alert for spring back. When the tension in the
wood fibres is released the spring loaded limb
may strike the operator and/or throw the chain
saw out of control.
Use extreme caution when cutting brush and
saplings. The slender material may catch the
saw chain and be whipped toward you or pull you
off balance.
Carry the chain saw by the front handle with
the chain saw switched off and away from
your body. When transporting or storing the
chain saw always fit the guide bar cover.
Proper handling of the chain saw will reduce the
likelihood of accidental contact with the moving
saw chain.
23. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
24. Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions
and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
Service
8.
9.
25. Have your power tool serviced by a qualified
repair
person
using
only
identical
replacement parts. This will ensure that the
safety of the power tool is maintained.
10. Follow instructions for lubricating, chain
tensioning and changing accessories.
26. Follow instruction for lubricating and
changing accessories.
27. Keep handles dry, clean and free from oil and
Improperly tensioned or lubricated chain may
either break or increase the chance for kickback.
11. Keep handles dry, clean, and free from oil and
grease. Greasy, oily handles are slippery causing
loss of control.
12. Cut wood only. Do not use chain saw for
purposes not intended. For example: do not
use chain saw for cutting plastic, masonry or
non-wood building materials. Use of the chain
saw for operations different than intended could
result in a hazardous situation.
13. Causes and operator prevention of kickback:
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 sudden
reverse reaction, kicking the guide bar up and
back towards the operator.
grease.
GEB037-8
Chain saw safety warnings
1.
Keep all parts of the body away from the saw
chain when the chain saw is operating. Before
you start the chain saw, make sure the saw chain
is not contacting anything. A moment of inattention
while operating chain saws may cause entanglement
of your clothing or body with the saw chain.
2.
3.
Always hold the chain saw with your right
hand on the rear handle and your left hand on
the front handle. Holding the chain saw with a
reversed hand configuration increases the risk of
personal injury and should never be done.
Hold the power tool by insulated gripping
surfaces only, because the saw chain may
contact hidden wiring or its own cord. Saw
Pinching the saw chain along the top of the guide
bar may push the guide bar rapidly back towards
the operator.
chains contacting
a
"live" wire may make
exposed metal parts of the power tool "live" and
could give the operator an electric shock.
Wear safety glasses and hearing protection.
Further protective equipment for head, hands,
legs and feet is recommended. Adequate
protective clothing will reduce personal injury by
flying debris or accidental contact with the saw
chain.
Do not operate a chain saw in a tree. Operation
of a chain saw while up in a tree may result in
personal injury.
Always keep proper footing and operate the
chain saw only when standing on fixed,
secure and level surface. Slippery or unstable
surfaces such as ladders may cause a loss of
balance or control of the chain saw.
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.
Kickback is the result of tool misuse and/or incorrect
operating procedures or conditions and can be
avoided by taking proper precautions as given below:
4.
5.
6.
−
Maintain a firm grip, with thumbs and fingers
encircling the chain saw handles, with both
hands on the saw and position your body
and arm to allow you to resist kickback
forces. Kickback forces can be controlled by the
operator, if proper precautions are taken. Do not
let go of the chain saw.
4
4. The chain saw is not intended for commercial use.
5. Do not overload the chain saw.
Personal protective equipment
1.
Clothing must be close-fitting, but must not
obstruct mobility.
2.
Wear the following protective clothing during
work:
•
A
tested safety helmet, if
a
hazard is
presented by falling branches or similar;
A face mask or goggles;
Suitable ear protection (ear muffs, custom or
mouldable ear plugs). Octave brand analysis
upon request.
Firm leather safety gloves;
Long trousers manufactured from strong
fabric;
Protective dungarees of cut-resistant fabric;
Safety shoes or boots with non-slip soles,
steel toes, and cut-resistant fabric lining;
A breathing mask, when carrying out work
which produces dust (e.g. sawing dry wood).
014316
•
•
−
Do not overreach and do not cut above
shoulder height. This helps prevent
unintended tip contact and enables better
control of the chain saw in unexpected
situations.
Only use replacement bars and chains
specified by the manufacturer. Incorrect
replacement bars and chains may cause
chain breakage and/or kickback.
Follow the manufacturer’s sharpening
and maintenance instructions for the saw
chain. Decreasing the depth gauge height
can lead to increased kickback.
•
•
−
−
•
•
•
Protection against electric shock
The chain saw must not be used in wet
･
weather or damp environments, as the
electric motor is not waterproof.
ADDITIONAL SAFETY RULES
1.
Read the instruction manual in order to familiarize
yourself with operation of the chain saw.
1.
Only plug the saw into sockets in tested electrical
circuits. Check that the system voltage matches
that on the rating plate. Ensure that a 16 A line
fuse is fitted. Saws used in the open air must be
connected to a residual current-operated circuit-
breaker with an operating current no higher than
30 mA.
2.
Before using the chain saw for the first time,
arrange to have instruction in its operation. If this
is not possible, at least practice cutting round
timber on a trestle before beginning work.
The chain saw must not be used by children or
young persons under 18 years of age. Young
persons over 16 years of age may be exempted
from this restriction if they are undergoing training
under the supervision of an expert.
3.
･
Should the connecting cable be
damaged, withdraw the mains plug
immediately.
Safe working practices
4.
5.
Working with the chain saw requires a high level
of concentration. Do not work with the saw if you
are not feeling fit and well. Carry out all work
calmly and carefully.
Never work under the influence of alcohol, drugs
or medication.
1.
Before starting work, check that the chain saw is
in proper working order and that its condition
complies with the safety regulations. Check in
particular that:
•
•
•
The chain brake is working properly;
The run-down brake is working properly;
The bar and the sprocket cover are fitted
correctly;
Proper use
1.
The chain saw is intended solely for cutting wood.
Do not use it for example to cut plastic or porous
concrete.
Only use the chain saw for operations described
in this instruction manual. Do not, for example,
use it to trim hedges or for similar purposes.
•
•
The chain has been sharpened and tensioned
in accordance with the regulations;
The mains cable and mains plug are
undamaged;
2.
Refer to the "CHECKS " section.
3. The chain saw must not be used for forestry work,
i.e. for felling and limbing standing timber. The
chain saw cable does not provide the operator
with the mobility and safety required for such
work.
2.
Always ensure in particular that the extension
cable used is of adequate cross-section (see
"SPECIFICATIONS"). When using a cable reel,
wind the cable completely off the reel. When
5
using the saw in the open air, ensure that the
cable employed is intended for open-air use and
is rated accordingly.
16. Guide the chain saw such that no part of your
body is within the extended path of the saw chain
(see figure).
3.
4.
5.
Keep the cord away from the cutting area and to
position cord so that it will not be caught on
branches, and the like, during cutting.
Do not operate the chain saw in the vicinity of
flammable dust or gases, as the motor generates
sparks and presents a risk of explosion.
Work only on firm ground and with a good footing.
Pay particular attention to obstacles (e.g. the
cable) in the working area. Take particular care
where moisture, ice, snow, freshly cut wood or
bark may make surfaces slippery. Do not stand
on ladders or trees when using the saw.
006909
17. When moving around between sawing operations,
apply the chain brake in order to prevent the
chain from being operated unintentionally. Hold
the chain saw by the front handle when carrying it,
and do not keep your finger on the switch.
18. Withdraw the mains plug when taking breaks or
leaving the chain saw unattended. Leave the
chain saw where it cannot present a hazard.
6.
Take particular care when working on sloping
ground; rolling trunks and branches pose
potential hazard.
a
7.
8.
Never cut above shoulder height.
Hold the chain saw with both hands when
switching it on and using it. Hold the rear
handle with your right hand and the front handle
with your left. Hold the handles firmly with your
thumbs. The bar and the chain must not be in
contact with any objects when the saw is
switched on.
Kickback
1.
Hazardous kickback may arise during work with
the chain saw. Kickback arises when the tip of the
bar (in particular the upper quarter) comes into
contact with wood or another solid object. This
causes the chainsaw to be deflected in the
direction of the operator.
014316
9.
Clean the area to be cut of foreign objects such
as sand, stones, nails, wire, etc. Foreign objects
damage the bar and chain, and can lead to
dangerous kickback.
006919
2.
In order to avoid kickback, observe the following:
Never begin the cut with the tip of the bar.
Never use the tip of the bar for cutting. Take
particular care when resuming cuts which
have already been started.
•
•
10. Take particular care when cutting in the vicinity of
wire fences. Do nut cut into the fence, as the saw
may kick back.
•
•
Start the cut with the chain running.
Always sharpen the chain correctly. In
particular, set the depth gauge to the correct
height.
Never saw through several branches at a time.
When limbing, take care to prevent the bar
from coming into contact with other branches.
When bucking, keep clear of adjacent trunks.
Always observe the bar tip.
11. Do not cut into the ground.
12. Cut pieces of wood singly, not in bunches or
stacks.
13. Avoid using the saw to cut thin branches and
roots, as these can become entangled in the
chain saw. Loss of balance presents a hazard.
14. Use a secure support (trestle) when cutting sawn
timber.
•
•
•
•
15. Do not use the chain saw to prise off or brush
away pieces of wood and other objects.
Use a trestle.
6
4.
5.
6.
7.
Have any damage to the plastic housing repaired
properly and immediately.
Safety features
1.
Always check that the safety features are in
Do not use the saw if the switch trigger is not
working properly. Have it properly repaired.
Under no circumstances should any modifications
be made to the chain saw. Your safety is at risk.
Do not carry out maintenance or repair work other
than that described in this instruction manual. Any
other work must be carried out by authorized
service centers.
Only use genuine replacement parts and
accessories intended for your model of saw. The
use of other parts increases the risk of accident.
We accept no responsibility for accidents or
damage should non-approved bars, saw chains
or other replacement parts or accessories be
used.
working order before starting work. Do not use
the chain saw if the safety features are not
working properly.
−
Chain brake:
The chain saw is fitted with a chain brake which
brings the saw chain to a standstill within a fraction
of a second. It is activated when the hand guard is
pushed forwards. The saw chain then stops within
0.15 s, and the power supply to the motor is
interrupted.
8.
9.
1. Chain brake
applied
2. Chain brake
released
2
1
First aid
･
Do not work alone. Always work within
shouting distance of a second person.
1.
2.
Always keep a first-aid box to hand. Replace any
items taken from it immediately.
Should you request assistance in the event of an
accident, state the following:
014317
−
Run-down brake:
The chain saw is equipped with an run down brake
which brings the saw chain to an immediate stop
when the ON/OFF switch is released. This
prevents the saw chain from running on when
switched off, and thus presenting a hazard.
The front and rear hand guards protect the user
against injury from pieces of wood which may be
thrown backwards, or a broken saw chain.
The trigger lockout prevents the chain saw from
being switched on accidentally.
•
•
•
•
•
Where did the accident happen?
What happened?
How many persons are injured?
What injuries do they have?
Who is reporting the accident?
−
NOTE:
Individuals with poor circulation who are exposed to
excessive vibration may experience injury to blood
vessels or the nervous system.
Vibration may cause the following symptoms to occur in
the fingers, hands or wrists: "Falling asleep
"(numbness), tingling, pain, stabbing sensation,
alteration of skin colour or of the skin.
−
−
The chain catcher protects the user against injury
should the chain jump or break.
Transport and storage
When the chain saw is not in use or is
･
being transported, withdraw the mains
plug and fit the guide bar cover
supplied with the saw. Never carry or
transport the saw with the saw chain
running.
If any of these symptoms occur, see a physician!
SAVE THESE INSTRUCTIONS.
WARNING:
1.
2.
Carry the chain saw by the front handle only, with
the bar pointing backwards.
Keep the chain saw in a secure, dry and locked
room out of the reach of children. Do not store the
chain saw outdoors.
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product. MISUSE or
failure to follow the safety rules stated in this
instruction manual may cause serious personal
injury.
Maintenance
1.
2.
3.
Withdraw the plug from the socket before carrying
out any adjustments or maintenance.
Check the power cable regularly for damage to
the insulation.
Clean the chain saw regularly.
7
DESIGNATION OF PARTS
(Nut model: the sprocket cover is tightened by nuts.)
For Model UC3050A, UC3550A, UC4050A, UC4550A
4
3
5
6
2
1
8
9
10
014372
(Lever model: the sprocket cover is tightened by lever.)
For Model UC3051A, UC3551A, UC4051A, UC4551A
4
3
5
6
2
1
7
8
9
10
014373
8
(For all models)
14
11
13
12
16
18
17
15
014514
1
2
3
Rear handle
Switch trigger
Front handle
7
8
9
Lever
13 Oil filler cap
14 Lock-off button
15 Chain catcher
Adjusting screw/dial
Sprocket cover
4
5
Front hand guard
Guide bar
10 Rear hand guard
11 Spike bumper
16 Guide bar cover
17 Cord hook
Adjusting screw for oil pump
(at the bottom)
6
Saw chain
12 Oil level sight
18
014375
(For lever models)
ASSEMBLY
1. Lever
2. Sprocket cover
2
1
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before carrying out any work on the
tool.
Removing or installing sprocket cover
To remove the sprocket cover, perform the following
steps:
(For nut models)
014393
Press and fully open the lever until it stops.
Turn the lever counterclockwise.
To install the sprocket cover, perform the above steps in
reverse.
Removing or installing saw chain
CAUTION:
•
Always wear gloves when installing or removing
the saw chain.
014453
Loosen the nut.
9
To remove the saw chain, perform the following steps:
1. Guide bar
2. Hole
1.
2.
Loosen the sprocket cover.
1
(For nut models) Turn the chain adjusting screw
counterclockwise to release the saw chain
tension.
(For lever models) Turn the adjusting dial to "-"
direction to loosen the saw chain tension.
1. Adjusting screw
2
014448
1
9.
Holding the guide bar, and turn the chain
adjusting screw / dial to adjust the saw chain
tension.
10. Place the sprocket cover so that the hooks fit
alongside the holes and the pin fits its counterpart
on the sprocket cover.
014515
1. Hook
2. Hole
3. Pin
1
1. Adjusting dial
2
1
3
014380
11. Tighten the sprocket cover.
014516
3.
4.
Remove the sprocket cover.
Remove the saw chain and guide bar from the
chain saw.
To install the saw chain, perform the following steps:
5.
Make sure the direction of the chain. The arrow
mark on the chain shows the direction of the
chain.
1. Sprocket
014454
1. Lever
2. Sprocket cover
2
1
1
014457
6.
Fit in one end of the saw chain on the top of the
guide bar and the other end of it around the
sprocket.
014394
7.
8.
Place the guide bar on the chain saw.
Align the tension slide with the hole of the guide
bar.
10
Adjusting saw chain tension
Engaging extension cord
CAUTION:
The saw chain may become loose after many hours of
use. From time to time check the saw chain tension
before use.
•
Make sure that the extension cord is unplugged to
the mains outlet.
1.
2.
Loosen the sprocket cover lightly.
Keep lifting up the guide bar tip slightly to keep
the guide bar horizontal.
1. Cord hook
2. Tool's cord
1
3.
Turn the adjusting screw / dial to adjust saw chain
tension.
3. Extension cord
4. Plug and socket
(the shape may
differ from country
to country)
3
1. Loosen
2
2. Tighten
2-4 mm
3. Chain adjusting
screw
4
4. Guide bar
5. Saw chain
014359
3
5
1
When engaging the extension cord, secure it to the
chain saw's cord with the cord hook.
2
Attach the cord hook about 100 - 200 mm from the extension
cord connector. This helps prevent unintentional disconnection.
4
014451
1. Loosen
2. Tighten
OPERATION
2-4 mm
3. Adjusting dial
4. Guide bar
5. Saw chain
CAUTION:
•
Hold the tool firmly with right hand on the rear
handle and left hand on the front handle when
performing the tool.
3
5
Switch action
1
2
4
1. Lock-off button
2. Switch trigger
014449
1
4.
Grasp the saw chain in the middle of the guide
bar and lift up. The gap between the guide bar
and the tie strap of the saw chain should be
approx. 2 - 4 mm.
2
5.
After adjusting the chain tension, tighten the
sprocket cover.
CAUTION:
014376
•
Do not tighten the saw chain too much.
Excessively high tension of saw chain may cause
breakage of saw chain, wear of the guide bar and
breakage of the adjusting dial.
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before checking function on the switch trigger.
Before plugging in the tool, always check to see
that the switch trigger actuates properly and
returns to the "OFF" position when released.
•
•
•
A chain which is too loose can jump off the bar,
and therefore presents an accident risk.
Carry out the procedure of installing or removing
saw chain in a clean place free from sawdust and
the like.
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
Lubrication
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before lubricating the saw chain.
11
CHECKS
Before starting work, carry out the following checks:
Checking the chain tension
Reclaimend
oil
WARNING:
•
Always withdraw the mains plug before checking
the chain tension, and wear safety gloves.
(For nut models)
006921
1. Loosen
Lubricate the saw chain and bar using biologically
degradable saw chain oil with an adhesion agent. The
adhesion agent in the saw chain oil prevents the oil from
being thrown off the saw excessively quickly. Mineral oils
must not be used, as they are harmful to the environment.
2. Tighten
3. Chain adjusting
screw
4. Guide bar
5. Saw chain
2-4 mm
3
5
1
2
CAUTION:
•
Prevent the oil from coming into contact with the
skin and eyes. Contact with the eyes causes
irritation. In the event of eye contact, flush the
affected eye immediately with clear water, then
consult a doctor at once.
4
014451
(For lever models)
1. Loosen
2. Tighten
2-4 mm
•
•
Never use waste oil. Waste oil contains carcinogenic
substances. The contaminants in waste oil cause
accelerated wear of the oil pump, the bar and the
chain. Waste oil is harmful to the environment.
When filling the chain saw with chain oil for the first
time, or refilling the tank after it has been completely
emptied, add oil up to the bottom edge of the filler
neck. The oil delivery may otherwise be impaired.
3. Adjusting dial
4. Guide bar
5. Saw chain
3
5
1
2
4
014449
The saw chain is correctly tensioned when it is in contact
with the underside of the bar and can be raised
approximately 2 - 4 mm from the bar by light finger pressure.
Check the chain tension frequently, as new chains are
subject to elongation.
1. Oil filler cap
1
2. Strap
2
Excessively high tension of saw chain may cause
breakage of saw chain, wear of the guide bar and
breakage of the adjusting dial.
A chain which is too loose can jump off the bar, and
therefore presents an accident risk.
014386
To fill the oil, perform the following steps:
If the chain is too loose: Refer to the section titled "Adjusting
saw chain tension" and adjust the saw chain tension again.
Checking the switch action
1.
Clean the area around the oil filler cap thoroughly
to prevent any dirt from entering the oil tank.
Unscrew the oil filler cap and add oil up to the
lower edge of the filler neck.
2.
CAUTION:
3.
4.
Screw the oil filler cap firmly back in place.
Wipe away any spilt chain oil carefully.
Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the
"OFF" position when released.
NOTE:
When the chain saw is used for the first time, it
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
•
may take up to two minutes for the saw chain oil to
begin its lubricating effect upon the saw
mechanism. Run the saw without load until it does
so (see "CHECKS ").
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
Do not pull the switch trigger hard without depressing
the lock-off button. This may cause switch breakage.
12
Checking the chain brake
NOTE:
Checking the chain oiler
Before starting work, check the oil level in the tank, and
the oil delivery.
The oil level can be seen in the oil level sight shown in
the figure.
•
If the chain saw fails to start, check whether the
chain brake is released. To release the chain
brake, pull the hand guard backwards firmly until
you feel it engage.
1. Oil level sight
1. Front hand guard
2. Lock
3
2
1
3. Unlock
1
014517
Check the oil delivery as follows:
Start the chain saw.
014387
2
With the saw running, hold the saw chain approximately
15 cm above a tree trunk or the ground. If lubrication is
adequate, the oil spray will produce a light oil trace.
Observe the wind direction, and do not expose yourself
to the oil spray unnecessarily.
3
1. Front hand guard
2. Unlock
3. Lock
1
CAUTION:
•
If an oil trace is not formed, do not use the saw. The
lifespan of the chain will otherwise be reduced.
Check the oil level. Clean the oil feed groove and the
oil feed hole in the bar (refer to "MAINTENANCE ").
014439
Check the chain brake as follows:
Adjusting the chain lubrication
1.
Hold the chain saw with both hands when
switching it on. Hold the rear handle with your
right hand, the front handle with your left. Make
sure that the bar and the chain do not contact
with any object.
2.
3.
First press the lock-off button, then the switch
trigger. The saw chain starts immediately.
Press the front hand guard forwards using the
back of your hand. Make sure that the saw chain
comes to an immediate standstill.
014392
CAUTION:
You can adjust the oil pump feed rate with the adjusting
screw.
•
If the saw chain does not stop immediately, do not
use the saw under any circumstances. Consult
Makita authorized service centers.
WORKING WITH THE CHAIN SAW
Checking the run-down brake
CAUTION:
Switch on the chain saw.
Release the switch trigger completely. Make sure the
saw chain comes to a standstill within a second.
•
•
Always use a front handle and rear handle and
firmly hold the tool by both front handle and rear
handle during operations.
Always secure the timber to be cut, otherwise the
cut fragments may cause personal injury.
CAUTION:
•
If the saw chain does not stop immediately, do not
use the saw under any circumstances. Consult
Makita authorized service centers.
13
Bucking
Limbing
CAUTION:
1. Spike bumper
•
Limbing may only be performed by trained
persons. A hazard is presented by the risk of kick-
back.
When limbing, support the chain saw on the trunk if
possible. Do not cut with the tip of the bar, as this
presents a risk of kickback.
1
Pay particular attention to branches under tension. Do
not cut unsupported branches from below.
Do not stand on the felled trunk when limbing.
Burrowing and parallel-to-grain cuts
014389
For bucking cuts, rest the spike bumper shown in the
figure on the wood to be cut.
With the saw chain running, saw into the wood, using
the rear handle to raise the saw and the front one to
guide it. Use the spike bumper as a pivot.
Continue the cut by applying slight pressure to the front
handle, easing the saw back slightly. Move the spike
bumper further down the timber and raise the front
handle again.
CAUTION:
•
Burrowing and parallel-to-grain cuts may only be
carried out by persons with special training. The
possibility of kickback presents a risk of injury.
When making several cuts, switch the chain saw off
between cuts.
CAUTION:
•
If the upper edge of the bar is used for cutting, the
chain saw may be deflected in your direction if the
chain becomes trapped. For this reason, cut with
the lower edge, so that the saw will be deflected
away from your body.
014390
Perform parallel-to-grain cuts at as shallow an angle as
possible. Carry out the cut as carefully as possible, as
the spike bumper cannot be used.
Felling
CAUTION:
•
Felling work may only be performed by trained
persons. The work is hazardous.
Observe local regulations if you wish to fell a tree.
1. Felling area
006914
45o
Cut wood under tension on the pressure side (A )first.
Then make the final cut on the tension side (B ). This
prevents the bar from becoming trapped.
2 1
/2
45o
1
A
006917
B
B
−
Before starting felling work, ensure that:
(1) Only persons involved in the felling operation
are in the vicinity;
A
(2) Any person involved has an unhindered path
of retreat through a range of approximately
45 ° either side of the felling axis. Consider
the additional risk of tripping over electrical
cables;
006915
14
(3) The base of the trunk is free of foreign
objects, roots and ranches;
(4) No persons or objects are present over a
distance of 2 1/2 tree lengths in the direction
in which the tree will fall.
−
−
Stand to the side of the falling tree. Keep an area
clear to the rear of the falling tree up to an angle of
45 ° either side of the tree axis (refer to the "
felling area
branches.
"
figure). Pay attention to falling
−
Consider the following with respect to each tree:
An escape path should be planned and cleared as
necessary before cuts are started. The escape
path should extend back and diagonally to the rear
of the expected line of fall as illustrated in figure.
•
•
•
•
•
Direction of lean;
Loose or dry branches;
Height of the tree;
Natural overhang;
Whether or not the tree is rotten.
1
1. Felling direction
2. Danger zone
3. Escape route
−
−
Consider the wind speed and direction. Do not
carry out felling work if the wind is gusting strongly.
Trimming of root swellings: Begin with the largest
swellings. Make the vertical cut first, then the
horizontal cut.
2
3
3
2
009202
MAINTENANCE
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.
006918
−
Cut a scarf: The scarf determines the direction in
which the tree will fall, and guides it. It is made on
the side towards which the tree is to fall. Cut the
scarf as close to the ground as possible. First
make the horizontal cut to a depth of 1/5 -1/3 of
the trunk diameter. Do not make the scarf too
large. Then make the diagonal cut.
•
•
Always wear gloves when performing any
inspection or maintenance.
Never use gasoline, benzine, thinner, alcohol or
the like. Discoloration, deformation or cracks may
result.
Carry out the maintenance work described below at
regular intervals. Warranty claims will be accepted only
if these operations have been performed regularly and
properly.
−
Cut any corrections to the scarf across its entire width.
Only maintenance work described in this instruction
manual may be performed by the user. Any other work
must be carried out by MAKITA authorized service
centers.
Cleaning the chain saw
Clean the saw regularly with a clean rag. The handles,
in particular, must be kept free of oil.
006923
Checking the plastic housing
−
Make the back cut a little higher than the base cut
of the scarf. The back cut must be exactly
horizontal. Leave approximately 1/10 of the trunk
diameter between the back cut and the scarf.
The wood fibers in the uncut trunk portion act as a
hinge. Do not cut right through the fibers under
any circumstances, as the tree will otherwise fall
unchecked. Insert wedges into the back cut in time.
Only plastic or aluminum wedges may be used to
keep the back cut open. The use of iron wedges is
prohibited.
Carry out regular visual inspections of all parts of the
housing. If any parts are damaged, have them repaired
immediately and properly in MAKITA authorized service
centers.
−
15
WARNING:
Sharpening the saw chain
CAUTION:
•
An excessive distance increases the risk of kick-back.
The sharpening angle of 30 ° must be the same on
all cutters. Differences in angle cause the chain to
run roughly and unevenly, accelerate wear, and
lead to chain breaks.
−
•
Always withdraw the mains plug and wear safety
gloves when performing work on the saw chain.
−
−
The side plate angle of the cutter is determined by
the depth of penetration of the round file. If the
specified file is used properly, the correct side
plate angle is produced automatically.
Side plate angle for each saw chain are as follows:
Chain blade 91PX: 80 °
1. Side plate angle
30
006924
Sharpen the saw chain when:
30
−
Mealy sawdust is produced when damp wood is
cut;
1
1
−
The chain penetrates the wood with difficulty, even
when heavy pressure is applied;
−
−
The cutting edge is obviously damaged;
The saw pulls to the left or right in the wood. The
reason for this behavior is uneven sharpening of
the saw chain, or damage to one side only.
014455
Sharpen the saw chain frequently, but remove only
a little material each time.
File and file guiding
−
−
−
−
Use a special round file (optional accessory) for
saw chains to sharpen the chain. Normal round
files are not suitable.
Diameter of the round file for each saw chain is as
follows:
Two or three strokes with a file are usually sufficient for
routine resharpening. When the saw chain has been
resharpened several times, have it sharpened in
MAKITA authorized service center.
Sharpening criteria:
Chain blade 91PX: 4.0 mm
−
−
−
−
All cutter length must be equal. Cutters of differing
length prevent the chain from running smoothly,
and may cause the chain to break.
Do not sharpen the chain once a minimum cutter
length of 3 mm has been reached. A new chain
must then be fitted.
The chip thickness is determined by the distance
between the depth gauge (round nose) and the
cutting edge.
The best cutting results are obtained with following
distance between cutting edge and depth gauge.
Chain blade 91PX: 0.65 mm
The file should only engage the cutter on the
forward stroke. Lift the file off the cutter on the
return stroke.
Sharpen the shortest cutter first. Then the length
of this shortest cutter becomes the standard for all
other cutters on the saw chain.
1. Cutting length
2
2
1
1
2. Distance between
cutting edge and
depth gauge
006927
3. Minimum 3 mm
−
−
Guide the file as shown in the figure.
The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder
has markings for the correct sharpening angle of
30 ° (align the markings parallel to the saw chain)
and limits the depth of penetration (to 4/5 of the
file diameter).
3
1
014456
16
Cleaning the oil guide
1. Oil guide groove
2. Oil feed hole
1
30
2
006928
−
After sharpening the chain, check the height of the
depth gauge using the chain gauge tool (optional
accessory).
014391
−
Clean the oil guide groove and the oil feed hole in
the bar at regular intervals.
New saw chains
Use two or three saw chains alternately, so that the saw
chain, sprocket and running surfaces of the bar wear
evenly.
Turn the bar over when changing the chain so that the
bar groove wears evenly.
CAUTION:
014344
•
Only use chains and bars which are approved for
this model of saw (refer to "SPECIFICATIONS").
−
Remove any projecting material, however small,
with a special flat file (optional accessory).
Round off the front of the depth gauge again.
−
1. Sprocket
1
Cleaning the guide bar and lubricating the
return sprocket
CAUTION:
•
Always wear safety gloves for this task. Burrs
present a risk of injury.
014513
Before fitting a new saw chain, check the condition of
the sprocket.
CAUTION:
•
A worn sprocket damages a new saw chain. Have
the sprocket replaced in this case.
Always fit
sprocket.
a
new locking ring when replacing the
006930
Check the running surfaces of the bar regularly for
damage. Clean using a suitable tool, and remove burrs
if necessary.
If the chain saw receives frequent use, lubricate the
return sprocket bearing at least once a week. Before
adding new fresh grease, carefully clean the 2 mm hole
on the tip of the guide bar, then force a small quantity of
multi-purpose grease (optional accessory) into the hole.
Maintaining the chain and run-down brakes
The braking systems are very important safety features.
Like any other component of the chain saw, they are
subject to a certain degree of wear. They must be
inspected regularly by MAKITA authorized service
centers. This measure is for your own safety.
17
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers,
always using Makita replacement parts.
Replacing carbon brushes
1. Limit mark
1
001145
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
1. Brush holder cap
2. Screwdriver
1
2
014395
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
After replacing brushes, plug in the tool and break in
brushes by running tool with no load for about 10
minutes.
Storing tool
Biologically degradable saw chain oil can only be kept
for a limited period. Beyond two years after manufacture,
biological oils begin to acquire an adhesive quality, and
cause damage to the oil pump and components in the
lubricating system.
−
Before taking the chain saw out of service for a
longer period, empty the oil tank and fill it with a
small quantity of engine oil (SAE 30).
−
Run the chain saw briefly to flush all residue of the
biological oil out of the tank, lubricating system
and saw mechanism.
NOTE:
When the chain saw is taken out of service, small
•
quantities of chain oil leaks from it for some time
afterwards. This is normal, and is not a sign of a
fault.
Store the chain saw on a suitable surface.
Before returning the chain saw to service, fill up with
fresh BIOTOP saw chain oil.
18
TROUBLE SHOOTING
Before asking for repairs, conduct your own inspection
first. If you find a problem that is not explained in the
manual, do not attempt to dismantle the tool. Instead,
ask Makita Authorized Service Centers.
Possible cause
Remedy
Malfunction status
Connect to the power supply.
Check the power supply.
No power supply.
Stop using the tool immediately, and ask your local
authorized service center.
Cable defective.
The chain saw does not
start.
Stop using the tool immediately, and ask your local
authorized service center.
Tool malfunction.
Chain does not run.
Chain brake is engaged.
Release chain brake.
Insufficient performance. Carbon brush worn down.
Oil tank is empty.
Ask your local authorized service center for repair.
Fill the oil tank.
Oil guide groove is dirty.
Clean the groove.
No oil on the chain.
Oil pump adjusting screw
incorrectly adjusted.
Adjust the oil pump feed rate.
Chain does not stop
even the chain brake is
engaged.
Stop using the tool immediately, and ask your local
authorized service center.
Brake band worn down.
Loose guide bar or saw
chain.
Adjust the guide bar and saw chain tension.
The tool vibrates
abnormally.
Stop using the tool immediately, and ask your local
authorized service center.
Tool malfunction.
014314
NOTE:
OPTIONAL ACCESSORIES
•
Some items in the list may be included in the tool
package as standard accessories. They may differ
from country to country.
CAUTION:
•
These
accessories
or
attachments
are
recommended for use with your Makita tool
specified in this manual. The use of any other
accessories or attachments might present a risk of
injury to persons. Only use accessory or
attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
•
•
•
•
Saw chain
Guide bar cover
Guide bar
Saw chain oil
19
|