Makita UC3550AP User manual

UC3050A
UC3550A
UC3550AP
UC4050A
UC4550A
UC3051A
UC3551A
UC4051A
UC4551A
EN Electric Chain Saw INSTRUCTION MANUAL 7
SL Električna verižna žaga NAVODILO ZA UPORABO 20
SQ Sharra elektrike me zinxhir MANUALI I PËRDORIMIT 33
BG Електрически верижен
трион
РЪКОВОДСТВО ЗА
ЕКСПЛОАТАЦИЯ 47
HR Električna motorna pila PRIRUČNIK S UPUTAMA 62
МК Електрична моторна пила УПАТСТВО ЗА УПОТРЕБА 75
RO Ferăstrău electric cu lanţ MANUAL DE INSTRUCŢIUNI 90
SR
Електрична ланчана тестера УПУТСТВО ЗА УПОТРЕБУ 104
RU Электрическая Цепная Пила РУКОВОДСТВО ПО
ЭКСПЛУАТАЦИИ 118
UK Електрична ланцюгова пила
ІНСТРУКЦІЯ З ЕКСПЛУАТАЦІЇ 133

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35
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Reclaimend
oil
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Fig.16
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32
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Fig.17
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45o
2 1/2
45o
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Fig.25
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Fig.33
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6

7ENGLISH
ENGLISH (Original instructions)
SPECIFICATIONS
Model UC3050A UC3051A UC3550A UC3550AP UC3551A
Max. chain speed 14.5 m/s (870 m/min)
Standard guide bar Bar length 300 mm 350 mm
Cutting length 260 mm 320 mm
Guide bar type Sprocket nose bar
Standard saw chain Type 91PX
Pitch 3/8"
No. of drive links 46 52
Recommended guide bar length 300 - 450 mm
Overall length (without guide bar) 505 mm
Net weight 5.4 kg 5.5 kg 5.5 kg 5.6 kg 5.5 kg
Extension cable (optional) DIN 57282/HO 7RN -F L=30 m max.,3x1.5 mm2
Model UC4050A UC4051A UC4550A UC4551A
Max. chain speed 14.5 m/s (870 m/min)
Standard guide bar Bar length 400 mm 450 mm
Cutting length 355 mm 415 mm
Guide bar type Sprocket nose bar
Standard saw chain Type 91PX
Pitch 3/8"
No. of drive links 56 62
Recommended guide bar length 300 - 450 mm
Overall length (without guide bar) 505 mm
Net weight 5.6 kg 5.7 kg
Extension cable (optional) DIN 57282/HO 7RN -F L=30 m max.,3x1.5 mm2
• Due to our continuing program of research and development, the specications herein are subject to change with-
out notice.
• Specications may differ from country to country.
• Weight according to EPTA-Procedure 01/2003
Symbol
The following show the symbols used for the equip-
ment. Be sure that you understand their meaning before
use.
Read instruction manual and follow the
warnings and safety instructions.
Wear eye protection.
Wear ear protection.
DOUBLE INSULATION
Caution: particular care and attention
required!
Caution: withdraw the mains plug immedi-
ately if the cable is damaged!
Caution: kickback!
Protect against rain and damp!
Wear a helmet, goggles and ear protection!
Wear safety gloves!
Withdraw the mains plug!
First aid
Maximum permissible length of cut
Direction of chain travel

8ENGLISH
Chain oil
Chain brake released
Chain brake applied
Prohibited!
Only for EU countries
Do not dispose of electric equipment
together with household waste material!
In observance of the European Directive,
on Waste Electric and Electronic
Equipment and its implementation in
accordance with national law, electric
equipment that have reached the end of
their life must be collected separately and
returned to an environmentally compatible
recycling facility.
Intended use
The tool is intended for cutting lumbers and logs.
Power supply
The tool should be connected only to a power supply of
the same voltage as indicated on the nameplate, and
can only be operated on single-phase AC supply. They
are double-insulated and can, therefore, also be used
from sockets without earth wire.
Noise
The typical A-weighted noise level determined accord-
ing to EN60745:
Sound pressure level (LpA) : 90.8 dB (A)
Sound power level (LWA) : 101.8 dB (A)
Uncertainty (K) : 2.5 dB (A)
Wear ear protection
Vibration
The vibration total value (tri-axial vector sum) deter-
mined according to EN60745:
Work mode : cutting wood
Vibration emission (ah) : 5.2 m/s2
Uncertainty (K) : 1.5 m/s2
NOTE: The declared vibration emission value has
been measured in accordance with the standard test
method and may be used for comparing one tool with
another.
NOTE: The declared vibration emission value
may also be used in a preliminary assessment of
exposure.
WARNING: The vibration emission during actual
use of the power tool can differ from the declared
emission value depending on the ways in which the
tool is used.
WARNING: Be sure to identify safety measures
to protect the operator that are based on an estima-
tion of exposure in the actual conditions of use (taking
account of all parts of the operating cycle such as
the times when the tool is switched off and when it is
running idle in addition to the trigger time).
EC Declaration of Conformity
For European countries only
The EC declaration of conformity is included as Annex A
to this instruction manual.
General Power Tool Safety Warnings
WARNING Read all safety warnings and all
instructions. Failure to follow the warnings and instruc-
tions may result in electric shock, re and/or serious
injury.
Save all warnings and instructions for
future reference.
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. 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 conguration increases the risk of
personal injury and should never be done.
3. Hold the power tool by insulated gripping
surfaces only, because the saw chain may con-
tact hidden wiring or its own cord. Saw chains
contacting a "live" wire may make exposed metal
parts of the power tool "live" and could give the
operator an electric shock.
4. Wear safety glasses and hearing protection.
Further protective equipment for head, hands,
legs and feet is recommended. Adequate pro-
tective clothing will reduce personal injury by ying
debris or accidental contact with the saw chain.
5. Do not operate a chain saw in a tree. Operation
of a chain saw while up in a tree may result in
personal injury.
6. Always keep proper footing and operate the
chain saw only when standing on xed, secure
and level surface. Slippery or unstable surfaces
such as ladders may cause a loss of balance or
control of the chain saw.
7. When cutting a limb that is under tension be
alert for spring back. When the tension in the
wood bres is released the spring loaded limb may
strike the operator and/or throw the chain saw out
of control.
8. 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.
9. 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 t the guide bar cover. Proper
handling of the chain saw will reduce the likelihood
of accidental contact with the moving saw chain.

9ENGLISH
10. Follow instructions for lubricating, chain ten-
sioning and changing accessories. 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 pur-
poses 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.
Pinching the saw chain along the top of the guide
bar may push the guide bar rapidly back towards
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.
Kickback is the result of tool misuse and/or incor-
rect operating procedures or conditions and can be
avoided by taking proper precautions as given below:
— Maintain a rm grip, with thumbs and
ngers 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 con-
trolled by the operator, if proper precautions
are taken. Do not let go of the chain saw.
— Do not overreach and do not cut above
shoulder height. This helps prevent unin-
tended tip contact and enables better control
of the chain saw in unexpected situations.
— Only use replacement bars and chains
specied 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.
ADDITIONAL SAFETY RULES
1. Read the instruction manual in order to familiarize
yourself with operation of the chain saw.
2. Before using the chain saw for the rst 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.
3. 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.
4.
Working with the chain saw requires a high level of con-
centration. Do not work with the saw if you are not feeling
t and well. Carry out all work calmly and carefully.
5. Never work under the inuence of alcohol, drugs
or medication.
Proper use
1. The chain saw is intended solely for cutting wood.
Do not use it for example to cut plastic or porous
concrete.
2. 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.
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.
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-tting, but must not
obstruct mobility.
2. Wear the following protective clothing during work:
• A tested safety helmet, if a hazard is pre-
sented 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).
Protection against electric shock
The chain saw must not be used in wet
weather or damp environments, as the
electric motor is not waterproof.
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 tted. Saws used in the open air must
be connected to a residual current-operated cir-
cuit-breaker with an operating current no higher
than 30 mA.

10 ENGLISH
Should the connecting cable be damaged,
withdraw the mains plug immediately.
Safe working practices
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 tted
correctly;
• The chain has been sharpened and ten-
sioned in accordance with the regulations;
• The mains cable and mains plug are
undamaged;
Refer to the "CHECKS " section.
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 using
the saw in the open air, ensure that the cable
employed is intended for open-air use and is rated
accordingly.
3. 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.
4. Do not operate the chain saw in the vicinity of
ammable dust or gases, as the motor generates
sparks and presents a risk of explosion.
5. Work only on rm 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.
6. Take particular care when working on sloping
ground; rolling trunks and branches pose a poten-
tial hazard.
7. Never cut above shoulder height.
8. Hold the chain saw with both hands when
switching it on and using it. Hold the rear han-
dle with your right hand and the front handle with
your left. Hold the handles rmly with your thumbs.
The bar and the chain must not be in contact with
any objects when the saw is switched on.
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 dan-
gerous kickback.
10. Take particular care when cutting in the vicinity of
wire fences. Do nut cut into the fence, as the saw
may kick back.
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.
16. Guide the chain saw such that no part of your
body is within the extended path of the saw chain
(see gure).
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 nger 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.
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 deected in the direc-
tion of the operator.

11 ENGLISH
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.
• Start the cut with the chain running.
• Always sharpen the chain correctly. In par-
ticular, 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.
• Use a trestle.
Safety features
1. Always check that the safety features are in
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 tted 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.
12
1. Chain brake applied 2. Chain brake released
— 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.
— 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 t the guide bar cover supplied with the
saw. Never carry or transport the saw with
the saw chain running.
1. Carry the chain saw by the front handle only, with
the bar pointing backwards.
2. Keep the chain saw in a secure, dry and locked
room out of the reach of children. Do not store the
chain saw outdoors.
MAINTENANCE
1. Withdraw the plug from the socket before carrying
out any adjustments or maintenance.
2. Check the power cable regularly for damage to the
insulation.
3. Clean the chain saw regularly.
4. Have any damage to the plastic housing repaired
properly and immediately.
5. Do not use the saw if the switch trigger is not
working properly. Have it properly repaired.
6. Under no circumstances should any modications
be made to the chain saw. Your safety is at risk.
7. 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.
8. Only use genuine replacement parts and acces-
sories intended for your model of saw. The use of
other parts increases the risk of accident.
9. We accept no responsibility for accidents or dam-
age should non-approved bars, saw chains or
other replacement parts or accessories be used.
First aid
Do not work alone. Always work within
shouting distance of a second person.
1. Always keep a rst-aid box to hand. Replace any
items taken from it immediately.
2. Should you request assistance in the event of an
accident, state the following:
• 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 ngers, hands or wrists: "Falling asleep "(numb-
ness), tingling, pain, stabbing sensation, alteration of
skin colour or of the skin.
If any of these symptoms occur, see a physician!
SAVE THESE INSTRUCTIONS.

12 ENGLISH
WARNING: DO NOT let comfort or famil-
iarity 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.
DESIGNATION OF PARTS
(Nut model: the sprocket cover is tightened by nuts.)
For Model UC3050A, UC3550A, UC3550AP,
UC4050A, UC4550A
1
2
34
5
6
9
10
8
(Lever model: the sprocket cover is tightened by lever.)
For Model UC3051A, UC3551A, UC4051A, UC4551A
1
2
34
5
6
9
10
8
7

13 ENGLISH
(For all models)
14
12
11
15
13
17
16 18
Cord hook
1
2
3
4
5
6
7
9
8
10
11
12
13
Spike bumper
18
14
15
16
17
Rear handle
Switch trigger
Oil filler cap
Front handle
Front hand guard
Guide bar
Saw chain
Lever
Adjusting screw/dial
Oil level sight
Rear hand guard
Lock-off button
Chain catcher
Guide bar cover
Adjusting screw for oil pump
(at the bottom)
Sprocket cover
ASSEMBLY
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)
► Fig.1
Loosen the nut.
(For lever models)
► Fig.2: 1. Lever 2. Sprocket cover
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.
To remove the saw chain, perform the following steps:
1. Loosen the sprocket cover.
2. (For nut models) Turn the chain adjusting screw
counterclockwise to release the saw chain ten-
sion.
(For lever models) Turn the adjusting dial to "-"
direction to loosen the saw chain tension.
► Fig.3: 1. Adjusting screw
► Fig.4: 1. Adjusting dial
3. Remove the sprocket cover.
4. 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.
► Fig.5: 1. Sprocket
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.
7. Place the guide bar on the chain saw.

14 ENGLISH
8. Align the tension slide with the hole of the guide
bar.
► Fig.6: 1. Guide bar 2. Hole
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 t
alongside the holes and the pin ts its counterpart
on the sprocket cover.
► Fig.7: 1. Hook 2. Hole 3. Pin
11. Tighten the sprocket cover.
► Fig.8
► Fig.9: 1. Lever 2. Sprocket cover
Adjusting saw chain tension
The saw chain may become loose after many hours
of use. From time to time check the saw chain tension
before use.
1. Loosen the sprocket cover lightly.
2. Lift up the guide bar tip slightly.
3. Turn the adjusting screw / dial to adjust saw chain
tension.
► Fig.10: 1. Loosen 2. Tighten 3. Chain adjusting
screw 4. Guide bar 5. Saw chain
► Fig.11: 1. Loosen 2. Tighten 3. Adjusting dial
4. Guide bar 5. Saw chain
4. Tighten the saw chain until the lower side of the
saw chain ts in the guide bar rail (see circle).
5. Keep holding the guide bar lightly, tighten the
sprocket cover after adjusting the chain tension.
Make sure that the saw chain does not loose at
lower side.
Make sure the saw chain ts snugly against the lower
side of the bar.
CAUTION:
• 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.
• 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.
Engaging extension cord
CAUTION:
• Make sure that the extension cord is unplugged
to the mains outlet.
► Fig.12: 1. Cord hook 2. Tool's cord 3. Extension
cord 4. Plug and socket (the shape may
differ from country to country)
When engaging the extension cord, secure it to the
chain saw's cord with the cord hook.
Attach the cord hook about 100 - 200 mm from the
extension cord connector. This helps prevent uninten-
tional disconnection.
OPERATION
CAUTION:
• Hold the tool rmly with right hand on the rear
handle and left hand on the front handle when
performing the tool.
Switch action
► Fig.13: 1. Lock-off button 2. Switch trigger
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.
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.
► Fig.14
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.
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, ush the
affected eye immediately with clear water, then
consult a doctor at once.
• Never use waste oil. Waste oil contains carcino-
genic 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 lling the chain saw with chain oil for the
rst time, or relling the tank after it has been
completely emptied, add oil up to the bottom
edge of the ller neck. The oil delivery may
otherwise be impaired.
► Fig.15: 1. Oil ller cap 2. Strap
To ll the oil, perform the following steps:
1. Clean the area around the oil ller cap thoroughly
to prevent any dirt from entering the oil tank.
2. Unscrew the oil ller cap and add oil up to the
lower edge of the ller neck.
3. Screw the oil ller cap rmly back in place.
4. Wipe away any spilt chain oil carefully.

15 ENGLISH
NOTE:
• When the chain saw is used for the rst time, it
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 ").
CHECKS
Before starting work, carry out the following checks:
Checking the chain tension
WARNING:
• Always withdraw the mains plug before check-
ing the chain tension, and wear safety gloves.
(For nut models)
► Fig.16: 1. Loosen 2. Tighten 3. Chain adjusting
screw 4. Guide bar 5. Saw chain
(For lever models)
► Fig.17: 1. Loosen 2. Tighten 3. Adjusting dial
4. Guide bar 5. Saw chain
Make sure the saw chain ts snugly against the lower
side of the bar (see circle).
Check the chain tension frequently, as new chains are
subject to elongation.
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.
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
CAUTION: Before plugging in the tool, always
check to see that the switch trigger actuates properly
and returns to the "OFF" position when released.
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.
Do not pull the switch trigger hard without depressing
the lock-off button. This may cause switch breakage.
Checking the chain brake
NOTE:
• If the chain saw fails to start, check whether the
chain brake is released. To release the chain
brake, pull the hand guard backwards rmly until
you feel it engage.
► Fig.18: 1. Front hand guard 2. Lock 3. Unlock
► Fig.19: 1. Front hand guard 2. Unlock 3. Lock
Check the chain brake as follows:
1. Hold the chain saw with both hands when switch-
ing 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. First press the lock-off button, then the switch
trigger. The saw chain starts immediately.
3. Press the front hand guard forwards using the
back of your hand. Make sure that the saw chain
comes to an immediate standstill.
CAUTION:
• If the saw chain does not stop immediately,
do not use the saw under any circumstances.
Consult Makita authorized service centers.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. Make sure the
saw chain comes to a standstill within a second.
CAUTION:
• If the saw chain does not stop immediately,
do not use the saw under any circumstances.
Consult Makita authorized service centers.
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 gure.
► Fig.20: 1. Oil level sight
Check the oil delivery as follows:
Start the chain saw.
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.
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 ").
Adjusting the chain lubrication
► Fig.21
You can adjust the oil pump feed rate with the adjusting
screw.
WORKING WITH THE CHAIN SAW
CAUTION:
• Always use a front handle and rear handle and
rmly 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.

16 ENGLISH
Bucking
► Fig.22: 1. Spike bumper
For bucking cuts, rest the spike bumper shown in the
gure 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.
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 deected in your direction
if the chain becomes trapped. For this reason,
cut with the lower edge, so that the saw will be
deected away from your body.
► Fig.23
Cut wood under tension on the pressure side (A) rst.
Then make the nal cut on the tension side (B). This
prevents the bar from becoming trapped.
► Fig.24
Limbing
CAUTION:
• 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 pres-
ents a risk of kickback.
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
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.
► Fig.25
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.
► Fig.26: 1. Felling area
— Before starting felling work, ensure that:
(1) Only persons involved in the felling operation
are in the vicinity;
(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;
(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.
— Consider the following with respect to each tree:
• Direction of lean;
• Loose or dry branches;
• Height of the tree;
• Natural overhang;
• Whether or not the tree is rotten.
— 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 rst, then the
horizontal cut.
► Fig.27
— 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.
— Cut any corrections to the scarf across its entire
width.
► Fig.28
— 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 bers in the uncut trunk portion act as
a hinge. Do not cut right through the bers 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.
— 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 " gure). Pay attention to falling branches.
— 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 gure.
► Fig.29: 1. Felling direction 2. Danger zone
3. Escape route

17 ENGLISH
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
• 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.
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.
Checking the plastic housing
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.
Sharpening the saw chain
CAUTION:
• Always withdraw the mains plug and wear
safety gloves when performing work on the saw
chain.
► Fig.30
Sharpen the saw chain when:
— Mealy sawdust is produced when damp wood is
cut;
— The chain penetrates the wood with difculty, 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.
Sharpen the saw chain frequently,
but remove only a little material each
time.
Two or three strokes with a le are usually sufcient
for routine resharpening. When the saw chain has
been resharpened several times, have it sharpened in
MAKITA authorized service center.
Sharpening criteria:
— 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 tted.
— 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
► Fig.31: 1. Cutting length 2. Distance between
cutting edge and depth gauge 3. Minimum
3 mm
WARNING:
• 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.
— The side plate angle of the cutter is determined
by the depth of penetration of the round le. If the
specied le 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 °
► Fig.32: 1. Side plate angle
File and le guiding
— Use a special round le (optional accessory) for
saw chains to sharpen the chain. Normal round
les are not suitable.
— Diameter of the round le for each saw chain is as
follows:
Chain blade 91PX: 4.0 mm
—
The le should only engage the cutter on the forward
stroke. Lift the le off the cutter on the return stroke.
— Sharpen the shortest cutter rst. Then the length
of this shortest cutter becomes the standard for all
other cutters on the saw chain.
► Fig.33
— Guide the le as shown in the gure.
— The le can be guided more easily if a le holder
(optional accessory) is employed. The le 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
le diameter).
► Fig.34
— After sharpening the chain, check the height of the
depth gauge using the chain gauge tool (optional
accessory).
► Fig.35
— Remove any projecting material, however small,
with a special at le (optional accessory).
— Round off the front of the depth gauge again.

18 ENGLISH
Cleaning the guide bar and
lubricating the return sprocket
CAUTION:
• Always wear safety gloves for this task. Burrs
present a risk of injury.
► Fig.36
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.
Cleaning the oil guide
► Fig.37: 1. Oil guide groove 2. Oil feed hole
— 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:
• Only use chains and bars which are
approved for this model of saw (refer to
"SPECIFICATIONS").
► Fig.38: 1. Sprocket
Before tting 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 t a new locking ring when replacing the
sprocket.
Maintaining the chain and run-down
brakes
The braking systems are very important safety fea-
tures. 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.
Replacing carbon brushes
► Fig.39: 1. Limit mark
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.
► Fig.40: 1. Brush holder cap 2. Screwdriver
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 manufac-
ture, 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 ll it with a
small quantity of engine oil (SAE 30).
— Run the chain saw briey to ush 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, ll up with
fresh BIOTOP saw chain oil.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.

19 ENGLISH
TROUBLE SHOOTING
Before asking for repairs, conduct your own inspection
rst. If you nd a problem that is not explained in the
manual, do not attempt to dismantle the tool. Instead,
ask Makita Authorized Service Centers.
No oil on the chain.
Chain does not stop
even the chain brake is
engaged.
The tool vibrates
abnormally.
Malfunction status Possible cause Remedy
The chain saw does not
start.
Chain does not run.
Insufficient performance.
Cable defective.
Chain brake is engaged.
Carbon brush worn down.
Oil tank is empty.
Oil guide groove is dirty.
Oil pump adjusting screw
incorrectly adjusted.
Brake band worn down.
Loose guide bar or saw
chain.
No power supply.
Release chain brake.
Ask your local authorized service center for repair.
Fill the oil tank.
Clean the groove.
Adjust the oil pump feed rate.
Adjust the guide bar and saw chain tension.
Tool malfunction.
Tool malfunction.
Connect to the power supply.
Check the power supply.
Stop using the tool immediately, and ask your local
authorized service center.
Stop using the tool immediately, and ask your local
authorized service center.
Stop using the tool immediately, and ask your local
authorized service center.
Stop using the tool immediately, and ask your local
authorized service center.
OPTIONAL
ACCESSORIES
CAUTION:
• These accessories or attachments are recom-
mended for use with your Makita tool specied
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 regard-
ing these accessories, ask your local Makita Service
Center.
• Saw chain
• Guide bar cover
• Guide bar
• Saw chain oil
NOTE:
• Some items in the list may be included in the
tool package as standard accessories. They
may differ from country to country.

20 SLOVENŠČINA
SLOVENŠČINA (Originalna navodila)
TEHNIČNI PODATKI
Model UC3050A UC3051A UC3550A UC3550AP UC3551A
Maks. hitrost verige 14,5 m/s (870 m/min)
Standardni meč Dolžina meča 300 mm 350 mm
Dolžina reza 260 mm 320 mm
Tip meča Konica verižnika meča
Standardna veriga žage Tip 91PX
Naklon 3/8"
Št. pogonskih povezav 46 52
Priporočena dolžina meča 300 - 450 mm
Skupna dolžina (brez meča) 505 mm
Neto teža 5,4 kg 5,5 kg 5,5 kg 5,6 kg 5,5 kg
Podaljšek kabla (izbirno) DIN 57282/HO 7RN -F D=30 m maks.,3x1,5 mm2
Model UC4050A UC4051A UC4550A UC4551A
Maks. hitrost verige 14,5 m/s (870 m/min)
Standardni meč Dolžina meča 400 mm 450 mm
Dolžina reza 355 mm 415 mm
Tip meča Konica verižnika meča
Standardna veriga žage Tip 91PX
Naklon 3/8"
Št. pogonskih povezav 56 62
Priporočena dolžina meča 300 - 450 mm
Skupna dolžina (brez meča) 505 mm
Neto teža 5,6 kg 5,7 kg
Podaljšek kabla (izbirno) DIN 57282/HO 7RN -F D=30 m maks.,3x1,5 mm2
• Zaradi našega nenehnega programa raziskav in razvoja si pridržujemo pravico do spremembe tehničnih podatkov
brez obvestila.
• Tehnični podatki se lahko razlikujejo od države do države.
• Teža je v skladu z EPTA-postopkom 01/2003
Simbol
Naslednji simboli se uporabljajo v povezavi s strojem.
Pred uporabo proizvoda se obvezno seznanite z njiho-
vim pomenom.
Preberite navodila za uporabo in upošte-
vajte opozorila in varnostna navodila.
Uporabljajte zaščito za oči.
Uporabljajte zaščito za sluh.
DVOJNA IZOLACIJA
Pozor: zahtevana posebna nega in
pozornost!
Pozor: če je kabel poškodovan, takoj
izvlecite električni vtič!
Pozor: povratni udarec!
Zaščitite pred dežjem in vlago!
Nosite čelado, očala in zaščito za sluh!
Uporabljajte zaščitne rokavice!
Izvlecite električni vtič!
Prva pomoč
Največja dovoljena dolžina reza
Smer premika verige