Makita GRU02 User manual

INSTRUCTION MANUAL
MANUAL DE INSTRUCCIONES
Cordless Grass Trimmer
Cortador Inalámbrico de Pasto
GRU02
GRU03
IMPORTANT: Read Before Using.
IMPORTANTE: Lea antes de usar.

2ENGLISH
ENGLISH (Original instructions)
SPECIFICATIONS
Model: GRU02 GRU03
Handle type Bike handle Loop handle
No load speed
(at each rotation speed level)
3: 0 - 7,000 /min
2: 0 - 5,500 /min
1: 0 - 4,600 /min
Overall length
(without cutting tool and battery)
1,815 mm (71-1/2″)
Nylon cord diameter 2.0 mm (0.08″)
Applicable cutting tool and
cutting diameter
2-tooth blade
(P/N 198345-9)
255 mm (10″)
3-tooth blade
(P/N 195299-1)
255 mm (10″)
4-tooth blade
(P/N 195150-5)
(P/N 196895-8)
230 mm (9″)
255 mm (10″)
Nylon cutting head
(P/N 198893-8)
430 mm (17″)
Rated voltage D.C. 36 V - 40 V max
Net weight 5.7 - 6.3 kg (12.6 - 13.9 lbs) 5.3 - 5.9 kg (11.7 - 13.0 lbs)
• Due to our continuing program of research and development, the specications herein are subject to change
without notice.
• Specications may di󰀨er from country to country.
• The weight may di󰀨er depending on the attachment(s), including the battery cartridge. The lightest and heavi-
est combination, according to EPTA-Procedure 01/2014, are shown in the table.
Applicable battery cartridge and charger
Battery cartridge BL4020 / BL4025* / BL4040* / BL4050F*
* : Recommended battery
Charger DC40RA / DC40RB / DC40RC
• Some of the battery cartridges and chargers listed above may not be available depending on your region of
residence.
WARNING: Only use the battery cartridges and chargers listed above. Use of any other battery cartridges
and chargers may cause injury and/or re.
Recommended cord connected power source
Portable power pack PDC01 / PDC1200
• The cord connected power source(s) listed above may not be available depending on your region of residence.
• Before using the cord connected power source, read instruction and cautionary markings on them.
SAFETY WARNINGS
Important safety instructions
WARNING: When using electric gardening
appliances, basic safety precautions should
always be followed to reduce the risk of re,
electric shock, and personal injury, including the
following.
Read All Instructions
Failure to follow the warnings and instructions may
result in electric shock, re and/or serious injury.
SAVE THESE INSTRUCTIONS.
General instructions
1.
Never allow people unfamiliar with these instruc-
tions or children to use the machine. Local reg-
ulations can restrict the age of the operator. It is
dangerous in the hands of untrained users or children.
2. Be sure that anyone who is to operate the tool
has rst read the instruction manual.

3ENGLISH
3.
Use the tool with the utmost care and attention.
4. Operate the tool only if you are in good physical
condition. Perform all work calmly and carefully.
Use common sense and keep in mind that the oper-
ator or user is responsible for accidents or hazards
occurring to other people or their property.
5. Never operate the tool when tired, feeling ill or
under the inuence of alcohol or drugs.
6. Avoid accidentally starting:
— Ensure the switch is in the o󰀨 posi-
tion before installing the battery pack.
Inserting the battery pack into the tool with
the switch on invites accidents.
— Carrying the tool with your nger on the
switch invites accidents.
7. The tool should be switched o󰀨 immediately if
it shows any signs of abnormal operation.
8.
Don't force the tool. It will do the job better and with less likeli-
hood of a risk of injury at the rate for which it was designed.
9. Don't overreach. Keep proper footing and
balance at all times.
10. Stay Alert - Watch what you are doing. Use
common sense. Do not operate appliance
when you are tired.
11. Store idle appliances indoors.
12. Keep ngers away from switch trigger when
not operating the tool and when moving from
one operating position to another.
Intended use of the tool
1. Use right tool. This tool is only intended for
cutting grass and light weeds. It should not be
used for any other purpose such as edging or
hedge cutting as this may cause injury.
2.
Use only the manufacturer’s recommended acces-
sories and attachments. Use of any other accesso-
ries and attachments may increase the risk of injury.
Personal protective equipment
1. Dress Properly. The clothing worn should be
functional and appropriate, i.e. it should be
tight-tting but not cause hindrance. Do not
wear loose clothing or jewelry. They can be
caught in moving parts. Use of thick leather
gloves and substantial footwear is recom-
mended when working outdoors. Wear protec-
tive hair covering to contain long hair.
2.
In order to avoid either head, eye, hand or foot inju-
ries as well as to protect your hearing the following
protective equipment and protective clothing must
be used during operation of the equipment.
3. Always wear a helmet where there is a risk of
falling objects. The protective helmet is to be
checked at regular intervals for damage and
is to be replaced at least every ve years. Use
only approved protective helmets.
4.
Use safety glasses. The visor of the helmet (or alter-
natively goggles) protects the face from ying debris
and stones. During operation of the tool always wear
goggles, or a visor to prevent eye injuries.
5. Wear adequate noise protection equipment to avoid
hearing impairment (ear mu󰀨s , ear plugs etc.).
6. Work overalls protect against injury from
ying stones and debris. It is strongly recom-
mended that the user wears work overalls.
7. Special gloves made of thick leather are part of
the prescribed equipment and must always be
worn during operation of the tool.
8. When using the tool, always wear sturdy shoes
with a nonslip sole. This protects against injuries
from ying debris and ensures a good footing.
9. Use a dust mask if operation is dusty.
Electrical and battery safety
1. Avoid dangerous environment. Don't use the
tool in damp or wet locations or expose it to
rain. Water entering the tool will increase the risk
of electric shock.
2. Prevent unintentional starting. Ensure the
switch is in the o󰀨-position before connecting
to battery pack, picking up or carrying the
machine. Carrying the machine with your nger
on the switch or energizing machine that have the
switch on invites accidents.
3. Disconnect the battery pack from the machine
before making any adjustments, changing
accessories, or storing machine. Such preven-
tive safety measures reduce the risk of starting the
machine accidentally.
4. Recharge only with the charger specied by
the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of re
when used with another battery pack.
5. Use machines only with specically desig-
nated battery packs. Use of any other battery
packs may create a risk of injury and re.
6. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from one
terminal to another. Shorting the battery termi-
nals together may cause burns or a re.

4ENGLISH
7. Under abusive conditions, liquid may be
ejected from the battery; avoid contact. If con-
tact accidentally occurs, ush with water. If
liquid contacts eyes, seek medical help. Liquid
ejected from the battery may cause irritation or
burns.
8. Do not use a battery pack or machine that is
damaged or modied. Damaged or modied
batteries may exhibit unpredictable behaviour
resulting in re, explosion or risk of injury.
9. Do not expose a battery pack or machine to
re or excessive temperature. Exposure to re
or temperature above 130°C (265°F) may cause
explosion.
10. Follow all charging instructions and do not
charge the battery pack or machine outside of
the temperature range specied in the instruc-
tions. Charging improperly or at temperatures
outside of the specied range may damage the
battery and increase the risk of re.
11. Have servicing performed by a qualied repair
person using only identical replacement parts.
This will ensure that the safety of the product is
maintained.
12. Do not modify or attempt to repair the machine
or the battery pack except as indicated in the
instructions for use and care.
13. Do not dispose of the battery(ies) in a re.
The cell may explode. Check with local codes for
possible special disposal instructions.
14. Do not open or mutilate the battery(ies).
Released electrolyte is corrosive and may cause
damage to the eyes or skin. It may be toxic if
swallowed.
15. Do not charge battery in rain, or in wet
locations.
16. Make sure there are no electrical cables, water
pipes, gas pipes etc. that could cause a hazard
if damaged by use of the tool.
17. Do not replace the battery with wet hands.
18. Do not replace the battery in the rain.
19. Do not wet the terminal of battery with liquid
such as water, or submerge the battery. Do not
leave the battery in the rain, nor charge, use,
or store the battery in a damp or wet place. If
the terminal gets wet or liquid enters inside of bat-
tery, the battery may be short circuited and there is
a risk of overheat, re, or explosion.
20. After removing the battery from the tool or
charger, be sure to attach the battery cover to
the battery and store it in a dry place.
21. If the battery cartridge gets wet, drain the
water inside and then wipe it with a dry cloth.
Dry the battery cartridge completely in a dry
place before use.
22. Do not charge the battery outdoors.
23. Do not handle charger, including charger plug,
and charger terminals with wet hands.
Starting up the tool
1. Make sure that there are no children or other
people within a working range of 15 meters
(50 ft), also pay attention to any animals in the
working vicinity. Otherwise stop using the tool.
2. Before use always check that the tool is safe
for operation. Check the security of the cutting
tool and the guard and the switch trigger/lever
for easy and proper action. Check for clean
and dry handles and test the on/o󰀨 function of
the switch.
3.
Check damaged parts before further use of
the tool. A guard or other part that is damaged
should be carefully checked to determine
that it will operate properly and perform its
intended function. Check for alignment of mov-
ing parts, binding of moving parts, breakage of
parts, mounting, and any other condition that
may a󰀨ect its operation. A guard or other part
that is damaged should be properly repaired
or replaced by our authorized service center
unless indicated elsewhere in this manual.
4. Switch on the motor only when hands and feet
are away from the cutting tool.
5. Before starting make sure that the cutting
tool has no contact with hard objects such as
branches, stones etc. as the cutting tool will
revolve when starting.
6. Remove any adjusting key, wrench or blade
cover before turning the power tool on. An
accessory left attached to a rotating part of the
power tool may result in personal injury.
7. Make sure there are no electrical cables, water
pipes, gas pipes etc. that could cause a hazard
if damaged by use of the tool.
8. Do not use a cutting tool which is not recom-
mended by Makita.
9. Do not operate the tool in bad weather or if
there is a risk of lightning.
Method of operation
1. Only use the tool in good light and visibility.
During the winter season beware of slippery
or wet areas, ice and snow (risk of slipping).
Always ensure a safe footing.
2. Take care against injury to feet and hands from
the cutting tool.
3. Never cut above waist height.
4. Never stand on a ladder and run the tool.
5. Never climb up into trees to perform cutting
operation with the tool.

5ENGLISH
6. Never work on unstable surfaces.
7. Remove sand, stones, nails etc. found within
the working range. Foreign particles may dam-
age the cutting tool.
8. Should the cutting tool hit stones or other hard
objects, immediately switch o󰀨 the motor and
inspect the cutting tool.
9. Before commencing cutting, the cutting tool
must reach full working speed.
10. During operation always hold the tool with
both hands. Never hold the tool with one hand
during use. Always ensure a safe footing.
11. The cutting tool has to be equipped with the
guard. Never run the tool with damaged guards
or without guards in place!
12. All protective equipment such as guards
supplied with the tool must be used during
operation.
13. Except in case of emergency, never drop
or cast the tool to the ground or this may
severely damage the tool.
14. Never drag the tool on the ground when mov-
ing from place to place, the tool may become
damaged if moved in this manner.
15. Always remove the battery cartridge from the
tool:
— whenever leaving the tool unattended;
— before clearing a blockage;
— before checking, cleaning or working on
the tool;
— whenever the tool starts vibrating
abnormally;
— whenever transporting the tool.
16. Always ensure that the ventilation openings
are kept clear of debris.
17. Cutting elements continue to rotate after the
motor is switched o󰀨.
18. Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
19. Take a rest to prevent loss of control caused
by fatigue. We recommend to take a 10 to
20-minute rest every hour.
20. Hold the power tool by insulated gripping
surfaces only, because the cutter blade may
contact hidden wiring. Cutter blades contacting
a “live” wire may make exposed metal parts of the
power tool “live” and could give the operator an
electric shock.
21. Do not use the tool on steep slopes.
22. The shoulder harness must be used during
operation, if supplied with the tool.
23. Do not touch the gear case during and imme-
diately after the operation. The gear case
becomes hot during operation and can cause burn
injury.
24. Do not start the tool when the cutting tool is
tangled with cut grass.
25. Before starting the tool, be sure that the cut-
ting tool is not touching the ground and other
obstacles such as a tree.
26. Always keep your hands, face, and clothes
away from the cutting tool when it is rotating.
Failure to do so may cause personal injury.
27. Only use the cutting tool that are marked with
a speed equal or higher than the speed marked
on the tool.
28. Do not use the tool when there is a risk of
lightning.
29.
When you use the tool on muddy ground, wet slope,
or slippery place, pay attention to your footing.
30. Avoid working in poor environment where
increased user fatigue is expected.
31. Do not use the tool in bad weather where visi-
bility is limited. Failure to do so may cause fall or
incorrect operation due to low visibility.
32. Do not submerge the tool into a puddle.
33. Do not leave the tool unattended outdoors in
the rain.
34. When wet leaves or dirt adhere to the suc-
tion mouth (ventilation window) due to rain,
remove them.
35. Do not use the tool in the snow.
36. Check the cutting attachment frequently
during operation for cracks or damages.
Before the inspection, remove the battery
cartridge and wait until the cutting attachment
stops completely. Replace damaged cutting
attachment immediately, even if it has only
supercial cracks.
Kickback (blade thrust)
Kickback (blade thrust) may occur when the spin-
ning blade contacts an object that it can not imme-
diately cut. It can be violent enough to cause the
unit and/or operator to be propelled in any direc-
tion, and possibly lose control of the unit, resulting
in a serious injury. Kickback can occur without
warning if the blade snags, stalls or binds and is
more likely to occur in areas where it is di󰀩cult to
see the material being cut.
Kickback occurs particularly when applying the
blade segment between 12 and 2 o’clock to hard
objects, bushes and trees with a diameter of 3 cm
or larger.
12 2
To avoid kickback:
1. Apply the segment between 8 and 11 o’clock.
2. Swing the tool evenly in a half-circle from
right to left, like using a scythe. This allows the
proper segment of the blade to contact plants to
be cut.

6ENGLISH
3.
Never apply the segment between 12 and 2 o’clock.
4. Never apply the segment between 11 and 12
o’clock and between 2 and 5 o’clock, unless
the operator is well trained and experienced
and does it at his/her own risk.
12 1
2
3
4
5
8
9
10
11
5. Never use cutting blades close to hard objects,
such as fences, walls, tree trunks and stones.
6. Never use cutting blades vertically, for such
operations as edging and trimming hedges.
7. Avoid using the tool in areas where it is di󰀩-
cult to see the object being cut.
Vibration
1. People 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" (numbness), tingling, pain, stabbing sen-
sation, alteration of skin color or of the skin. If any
of these symptoms occur, see a physician!
2. To reduce the risk of "white nger disease",
keep your hands warm during operation and
well maintain the tool and accessories.
Maintenance instructions
1. The condition of the cutting tool, protective
devices must be checked before commencing
work.
2. Turn o󰀨 the motor and remove the battery
cartridge before carrying out maintenance,
replacing the cutting tool and cleaning the
tool.
3. Check for loose fasteners and damaged parts
such as cracks in the cutting tool.
4. Follow instructions for lubricating and chang-
ing accessories if applicable.
5. When not in use store the equipment in an
indoor dry location that is locked up or out of
children's reach.
6. Use only the manufacturer's recommended
replacement parts and accessories.
7. Inspect and maintain the tool regularly, espe-
cially before/after use. Have the tool repaired
only by our authorized service center.
8. Keep handles dry, clean and free from oil and
grease. Keep all cooling air inlets clear of
debris.
9. Always keep the tool in good working condi-
tion. Poor maintenance can result in inferior per-
formance and shorten the life of the tool.
10. Do not wash the tool with high pressure water.
11. When washing the tool, do not let water enter
the electrical mechanism such as battery,
motor, and terminals.
12. When storing the tool, avoid direct sunlight
and rain, and store it in a place where it does
not get hot or humid.
13. Perform inspection or maintenance in a place
where rain can be avoided.
14. After using the tool, remove the adhered dirt
and dry the tool completely before storing.
Depending on the season or the area, there is a
risk of malfunction due to freezing.
15. When not in use, attach the blade cover onto
the blade. Remove the cover before operation.
16. Before transporting the tool, turn it o󰀨 and
remove the battery cartridge. Attach the cover
to the cutting blade.
Storage
1. Before storing the tool, perform full cleaning
and maintenance. Remove the battery car-
tridge. Attach the cover to the cutting blade.
2. Store the tool in a dry and high or locked loca-
tion out of reach of children.
3. Do not prop the tool against something, such
as a wall. Otherwise it may fall suddenly and
cause an injury.
SAVE THESE INSTRUCTIONS.
WARNING: 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.
WARNING: Use of this product can create
dust containing chemicals which may cause
respiratory or other illnesses. Some examples of
these chemicals are compounds found in pesti-
cides, insecticides, fertilizers and herbicides.
Your risk from these exposures varies, depend-
ing on how often you do this type of work. To
reduce your exposure to these chemicals: work
in a well ventilated area, and work with approved
safety equipment, such as those dust masks that
are specially designed to lter out microscopic
particles.
Symbols
The followings show the symbols used for tool.
volts
direct current
no load speed
revolutions or reciprocation per minute

7ENGLISH
Important safety instructions for
battery cartridge
1. Before using battery cartridge, read all instruc-
tions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using
battery.
2. Do not disassemble or tamper the battery
cartridge. It may result in a re, excessive heat,
or explosion.
3. If operating time has become excessively
shorter, stop operating immediately. It may
result in a risk of overheating, possible burns
and even an explosion.
4. If electrolyte gets into your eyes, rinse them
out with clear water and seek medical atten-
tion right away. It may result in loss of your
eyesight.
5. Do not short the battery cartridge:
(1) Do not touch the terminals with any con-
ductive material.
(2) Avoid storing battery cartridge in a con-
tainer with other metal objects such as
nails, coins, etc.
(3) Do not expose battery cartridge to water
or rain.
A battery short can cause a large current
ow, overheating, possible burns and even a
breakdown.
6. Do not store and use the tool and battery car-
tridge in locations where the temperature may
reach or exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge even if
it is severely damaged or is completely worn
out. The battery cartridge can explode in a re.
8. Do not nail, cut, crush, throw, drop the battery
cartridge, or hit against a hard object to the
battery cartridge. Such conduct may result in a
re, excessive heat, or explosion.
9. Do not use a damaged battery.
10. The contained lithium-ion batteries are subject
to the Dangerous Goods Legislation require-
ments.
For commercial transports e.g. by third parties,
forwarding agents, special requirement on pack-
aging and labeling must be observed.
For preparation of the item being shipped, consult-
ing an expert for hazardous material is required.
Please also observe possibly more detailed
national regulations.
Tape or mask o󰀨 open contacts and pack up the
battery in such a manner that it cannot move
around in the packaging.
11. When disposing the battery cartridge, remove
it from the tool and dispose of it in a safe
place. Follow your local regulations relating to
disposal of battery.
12. Use the batteries only with the products
specied by Makita. Installing the batteries to
non-compliant products may result in a re, exces-
sive heat, explosion, or leak of electrolyte.
13. If the tool is not used for a long period of time,
the battery must be removed from the tool.
14. During and after use, the battery cartridge may
take on heat which can cause burns or low
temperature burns. Pay attention to the han-
dling of hot battery cartridges.
15. Do not touch the terminal of the tool imme-
diately after use as it may get hot enough to
cause burns.
16. Do not allow chips, dust, or soil stuck into the
terminals, holes, and grooves of the battery
cartridge. It may result in poor performance or
breakdown of the tool or battery cartridge.
17. Unless the tool supports the use near
high-voltage electrical power lines, do not use
the battery cartridge near a high-voltage elec-
trical power lines. It may result in a malfunction
or breakdown of the tool or battery cartridge.
18. Keep the battery away from children.
SAVE THESE INSTRUCTIONS.
CAUTION: Only use genuine Makita batteries.
Use of non-genuine Makita batteries, or batteries that
have been altered, may result in the battery bursting
causing res, personal injury and damage. It will
also void the Makita warranty for the Makita tool and
charger.
Tips for maintaining maximum
battery life
1. Charge the battery cartridge before completely
discharged. Always stop tool operation and
charge the battery cartridge when you notice
less tool power.
2. Never recharge a fully charged battery car-
tridge. Overcharging shortens the battery
service life.
3. Charge the battery cartridge with room tem-
perature at 10 °C - 40 °C (50 °F - 104 °F). Let
a hot battery cartridge cool down before
charging it.
4. When not using the battery cartridge, remove
it from the tool or the charger.
5. Charge the battery cartridge if you do not use
it for a long period (more than six months).

8ENGLISH
PARTS DESCRIPTION
6
14
12
6
7
7
8
8
9
9
10
10
11
12
GRU03
GRU02
13
13
21
3
54
6
14
12
6
7
7
8
8
9
9
10
10
11
12
13
13
21
3
54
14
1Speed indicator 2ADT indicator
(ADT = Automatic Torque
Drive Technology)
3Caution lamp 4Main power button
5Reverse button 6Battery cartridge 7Lock-o󰀨 lever 8Switch trigger
9Hanger 10 Handle 11 Barrier (country specic) 12 Protector
13 Protector extension (for
nylon cutting head)
14 Shoulder harness - - - -

9ENGLISH
FUNCTIONAL DESCRIPTION
WARNING: Always be sure that the tool is
switched o󰀨 and the battery cartridge is removed
before adjusting or checking function on the tool.
Failure to switch o󰀨 and remove the battery cartridge
may result in serious personal injury from accidental
start-up.
Installing or removing battery
cartridge
CAUTION: Always switch o󰀨 the tool before
installing or removing of the battery cartridge.
CAUTION: Hold the tool and the battery car-
tridge rmly when installing or removing battery
cartridge. Failure to hold the tool and the battery
cartridge rmly may cause them to slip o󰀨 your hands
and result in damage to the tool and battery cartridge
and a personal injury.
2 3
1
1
► 1. Red indicator 2. Button 3. Battery cartridge
To remove the battery cartridge, slide it from the tool
while sliding the button on the front of the cartridge.
To install the battery cartridge, align the tongue on the
battery cartridge with the groove in the housing and slip
it into place. Insert it all the way until it locks in place
with a little click. If you can see the red indicator as
shown in the gure, it is not locked completely.
CAUTION: Always install the battery cartridge
fully until the red indicator cannot be seen. If not,
it may accidentally fall out of the tool, causing injury to
you or someone around you.
CAUTION: Do not install the battery cartridge
forcibly. If the cartridge does not slide in easily, it is
not being inserted correctly.
Tool / battery protection system
The tool is equipped with a tool/battery protection
system. This system automatically cuts o󰀨 power to
the motor to extend tool and battery life. The tool will
automatically stop during operation if the tool is placed
under one of the following conditions:
Caution lamp Status
Color On Blinking
Green Overload
Red (tool) / (battery) Overheat
Red Over
discharge
Overload protection
If the tool gets into one of the following situation, the
tool automatically stops and the caution lamp starts
blinking in green:
— The tool is overloaded by entangled weeds or
other debris.
— The cutting tool is locked or kicked back.
— The main power button is turned on while the
switch trigger is being pulled.
In this situation, release the switch trigger and remove
entangled weeds or debris if necessary. After that, pull
the switch trigger again to resume.
CAUTION: If you need to remove the entan-
gled weeds on the tool or release the locked
cutting tool, be sure to turn the tool o󰀨 before you
start.
Overheat protection for tool or
battery
If the tool or battery cartridge is overheated, the tool
stops automatically. When the tool is overheated, the
caution lamp lights up in red. When the battery cartridge
is overheated, the caution lamp blinks in red. Let the
tool and/or battery cool down before turning the tool on
again.
Overdischarge protection
When the battery capacity becomes low, the tool stops
automatically and the caution lamp starts blinking in red.
If the tool does not operate even when the switches are
operated, remove the battery cartridge from the tool and
charge it.

10 ENGLISH
Indicating the remaining battery
capacity
Press the check button on the battery cartridge to indi-
cate the remaining battery capacity. The indicator lamps
light up for a few seconds.
1
2
► 1. Indicator lamps 2. Check button
Indicator lamps Remaining
capacity
Lighted O󰀨 Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
The battery
may have
malfunctioned.
NOTE: Depending on the conditions of use and the
ambient temperature, the indication may di󰀨er slightly
from the actual capacity.
NOTE: The rst (far left) indicator lamp will blink when
the battery protection system works.
Main power switch
Tap the main power button to turn on the tool.
To turn o󰀨 the tool, press and hold the main power
button until the speed indicator goes o󰀨.
2
1
► 1. Speed indicator 2. Main power button
NOTE: The tool will automatically turned o󰀨 if it is left
without any operations for a certain period of time.
Switch action
WARNING: For your safety, this tool is
equipped with lock-o󰀨 lever which prevents the
tool from unintended starting. NEVER use the tool
if it runs when you simply pull the switch trigger
without pressing the lock-o󰀨 lever. Return the
tool to our authorized service center for proper
repairs BEFORE further usage.
WARNING: NEVER tape down or defeat pur-
pose and function of lock-o󰀨 lever.
CAUTION: Before installing the battery car-
tridge into the tool, always check to see that the
switch trigger actuates properly and returns to
the "OFF" position when released. Operating a tool
with a switch that does not actuate properly can lead
to loss of control and serious personal injury.
CAUTION: Never put your nger on the main
power button and switch trigger when carrying
the tool. The tool may start unintentionally and cause
injury.
NOTICE: Do not pull the switch trigger hard with-
out pressing the lock-o󰀨 lever. This can cause
switch breakage.

11 ENGLISH
To prevent the switch trigger from being accidentally
pulled, a lock-o󰀨 lever is provided. To start the tool,
depress the lock-o󰀨 lever and pull the switch trigger.
The tool speed increases by increasing pressure on the
switch trigger. Release the switch trigger to stop.
GRU02
1
2
► 1. Lock-o󰀨 lever 2. Switch trigger
GRU03
1
2
► 1. Lock-o󰀨 lever 2. Switch trigger
NOTE: Always depress the lock-o󰀨 lever and pull the
switch trigger to run the tool. In the following cases,
the main power switch turns o󰀨 automatically:
— When both the lock-o󰀨 lever and switch trigger
are released.
— When the lock-o󰀨 lever is released for 1 second.
— When the lock-o󰀨 lever is not depressed within
45 seconds after the main power switch is
turned on.
— When the switch trigger is not pulled for 60 sec-
onds while the lock-o󰀨 lever is being depressed.
Speed adjusting
You can select the tool speed by tapping the main
power button. Each time you tap the main power button,
the level of speed will change.
2
1
► 1. Speed indicator 2. Main power button
Speed indicator Mode Rotation speed
High 0 - 7,000 /min
Medium 0 - 5,500 /min
Low 0 - 4,600 /min
Automatic Torque Drive Technology
When you turn on the Automatic Torque Drive
Technology (ADT), the tool runs at optimum rotation
speed and torque for the condition of grass being cut.
To start ADT, press and hold the reverse button until
the ADT indicator turns on. After that, tap the main
power button to select the cutting tool attached to the
tool. Light the lamp beside marking to select cutter
blade, marking to select nylon cutting head.
To stop ADT, press and hold the reverse button until the
ADT indicator turns o󰀨.
54
1
2
3
► 1. marking 2. marking 3. ADT indicator
4. Main power button 5. Reverse button

12 ENGLISH
Indicator Mode Cutting tool Rotation
speed
ADT
(Cutter blade)
Cutter blade 3,500 - 7,000
/min
ADT
(Nylon cutting
head)
Nylon cutting
head
3,500 - 5,500
/min
Reverse button for debris removal
WARNING: Switch o󰀨 the tool and remove
the battery cartridge before you remove entan-
gled weeds or debris which the reverse rotation
function can not remove. Failure to switch o󰀨 and
remove the battery cartridge may result in serious
personal injury from accidental start-up.
This tool has a reverse button to change the direction of
rotation. It is only for removing weeds and debris entan-
gled in the tool.
To reverse the rotation, tap the reverse button and pull
the switch trigger while depressing the lock-o󰀨 lever
when the cutting tool is stopped. The speed indicators
and ADT indicator start blinking, and the cutting tool
rotates in reverse direction when you pull the switch
trigger.
To return to regular rotation, release the trigger and wait
until the cutting tool stops.
3
1
2
► 1. Speed indicator 2. ADT indicator 3. Reverse
button
NOTE: During the reverse rotation, the tool operates
only for a short period of time and then automatically
stops.
NOTE: Once the tool is stopped, the rotation returns
to regular direction when you start the tool again.
NOTE: If you tap the reverse button while the cutting
tool is still rotating, the tool comes to stop and to be
ready for reverse rotation.
Electric brake
This tool is equipped with an electric brake. If the tool
consistently fails to quickly stop after the switch trigger
is released, have the tool serviced at our service center.
CAUTION: This brake system is not a substi-
tute for the protector. Never use the tool without
the protector. An unguarded cutting tool may result
in serious personal injury.
Electronic function
Constant speed control
The speed control function provides the constant rota-
tion speed regardless of load conditions.
Soft start feature
Soft start because of suppressed starting shock.
ASSEMBLY
WARNING: Always be sure that the tool is
switched o󰀨 and battery cartridge is removed
before carrying out any work on the tool. Failure to
switch o󰀨 and remove the battery cartridge may result
in serious personal injury from accidental start-up.
WARNING: Never start the tool unless it is
completely assembled. Operation of the tool in a
partially assembled state may result in serious per-
sonal injury from accidental start-up.
Installing the handle
For GRU02
1. Insert the shaft of the handle into the grip. Align
the screw hole in the grip with the one in the shaft.
Tighten the screw securely.
1
3
2
► 1. Grip 2. Screw 3. Shaft
NOTICE: Note the direction of the grip. The
screw holes will not be aligned if the grip is not
inserted in the correct direction.

13 ENGLISH
2. Adjust the handle position, and then tighten the
knob to x the handle.
1
► 1. Knob
For GRU03
1. Attach the upper and lower clamps on the damper.
2. Put the handle on the upper clamp and x it with
hex socket head bolts as illustrated.
1
2 3
5
4
► 1. Hex socket head bolt 2. Handle 3. Upper clamp
4. Damper 5. Lower clamp
Attaching the barrier
For the loop handle model only (country specic)
If the barrier is included in your model, attach it to the
handle using the screw on the barrier.
1
2
► 1. Barrier 2. Screw
CAUTION: After assembling the barrier, do
not remove it. The barrier works as a safety part
to prevent you from contacting the cutting blade
accidentally.
Hex wrench storage
CAUTION: Be careful not to leave the hex
wrench inserted in the tool head. It may cause
injury and/or damage to the tool.
When not in use, store the hex wrench as illustrated to
keep it from being lost.
GRU02
1
► 1. Hex wrench

14 ENGLISH
GRU03
1
► 1. Hex wrench
Correct combination of the cutting
tool and the protector
CAUTION: Always use the correct combi-
nation of cutting tool and the protector. A wrong
combination may not protect you from the cutting tool,
ying debris, and stones. It can also a󰀨ect the bal-
ance of the tool and result in an injury.
Cutting tool Protector
Cutter blade
(2-tooth, 3-tooth, 4-tooth
blades)
Nylon cutting head
Installing the protector
WARNING: Never use the tool without the
guard or with the guard improperly installed.
Failure to do so can cause serious personal injury.
NOTE: The type of the protector supplied as the stan-
dard accessory varies depending on the countries.
For cutter blade
Attach the protector to the clamp using bolts.
1
2
► 1. Clamp 2. Protector
For nylon cutting head
CAUTION: Take care not to injure yourself on
the cutter for cutting the nylon cord.
Attach the protector to the clamp using bolts. After
that, install the protector extension. Insert the protector
extension to the protector and then snap the clips on.
Make sure that the tabs on the protector extension t
into the slots on the protector.
1
2
4
3
6
5
► 1. Protector 2. Clip 3. Protector extension 4. Cutter
5. Slot 6. Tab

15 ENGLISH
To remove the protector extension from the protec-
tor, unclasp the clips by inserting the hex wrench as
illustrated.
1
2
► 1. Hex wrench 2. Clip
Installing the cutting tool
CAUTION: Always use the supplied wrenches
to remove or to install the cutting tool.
CAUTION: Be sure to remove the hex wrench
inserted into the tool head after installing the
cutting tool.
NOTE: The type of the cutting tool(s) supplied as
the standard accessory varies depending on the
countries. The cutting tool is not included in some
countries.
NOTE: Turn the tool upside down so that you can
replace the cutting tool easily.
Cutter blade
CAUTION: When handling a cutter blade,
always wear gloves and put the blade cover on
the blade.
CAUTION: The cutter blade must be well pol-
ished, and free of cracks or breakage. If the cutter
blade hits a stone during operation, stop the tool and
check the cutter blade immediately.
CAUTION: Always use the cutter blade
with the diameter described in the section for
specications.
1. Put the blade cover on the cutter blade.
2-tooth blade
3-tooth blade
4-tooth blade

16 ENGLISH
2. Insert the hex wrench through the hole in the gear
case to lock the spindle. Rotate the spindle until the hex
wrench is fully inserted.
1
2
4
5
6
7
3
► 1. Nut 2. Cup 3. Clamp washer 4. Cutter blade
5. Spindle 6. Receive washer 7. Hex wrench
3. Mount the cutter blade onto the receive washer
so that the arrows on the cutter blade and protector are
pointing in the same direction.
1
1
► 1. Arrow
4.
Put the clamp washer and cup onto the cutter blade
and then tighten the nut securely by the box wrench.
1
2
3
4
► 1. Box wrench 2. Hex wrench 3. Loosen 4. Tighten
NOTE: Tightening torque : 20 - 30 N•m
5. Remove the hex wrench from the gear case.
To remove the cutter blade, follow the installation proce-
dures in reverse.
Nylon cutting head
NOTICE: Be sure to use genuine Makita nylon
cutting head.
4
5
3
1
2
► 1. Nylon cutting head 2. Spindle 3. Hex wrench
4. Loosen 5. Tighten
1. Insert the hex wrench through the hole in the gear
case to lock the spindle. Rotate the spindle until the hex
wrench is fully inserted.
2. Place the nylon cutting head onto the spindle and
tighten it securely by hand.
3. Remove the hex wrench from the gear case.
To remove the nylon cutting head, follow the installation
procedures in reverse.
OPERATION
Attaching the shoulder harness
WARNING: Be extremely careful to maintain
control of the tool at all times. Do not allow the
tool to be deected toward you or anyone in the
work vicinity. Failure to keep control of the tool
could result in serious injury to the bystander and the
operator.

17 ENGLISH
CAUTION: Always use the shoulder harness
attached to the tool. Before operation, adjust the
shoulder harness according to the user size to
prevent fatigue.
CAUTION: Before operation, make sure that
the shoulder harness is properly attached to the
hanger on the tool.
CAUTION: When you use the tool in combi-
nation of the backpack-type power supply such
as portable power pack, do not use the shoulder
harness included in the tool package, but use the
hanging band recommended by Makita.
If you put on the shoulder harness included in the
tool package and the shoulder harness of the back-
pack-type power supply at the same time, removing
the tool or backpack-type power supply is di󰀩cult in
case of an emergency, and it may cause an accident
or injury. For the recommended hanging band, ask
Makita Authorized Service Centers.
For GRU02
1. Put on the shoulder harness and fasten the
buckle.
2. Clasp the hook on the shoulder harness to tool's
hanger.
1
2
► 1. Hook 2. Hanger
3. Adjust the shoulder harness to a comfortable
working position.
The shoulder harness features a means of quick
release. Simply squeeze the sides of the buckle while
holding the tool to release the tool from the shoulder
harness.
1
► 1. Buckle
For GRU03
1. Clasp the hook on the shoulder harness to tool's
ring and hanger.
1
2
3
2
► 1. Ring 2. Hook 3. Hanger

18 ENGLISH
2. Put on the shoulder harness on your left shoulder.
Adjust the shoulder harness to a comfortable working
position.
The shoulder harness features a means of quick
release. Simply squeeze the sides of the buckle while
holding the tool to release the tool from the shoulder
harness.
1
► 1. Buckle
Adjusting the hanger position
For GRU02 only
For more comfortable handling of the tool, you can
change the hanger position.
1. Loosen the hex socket head bolt on the hanger,
and slide the hanger to a comfortable working position.
2
1
► 1. Hanger 2. Hex socket head bolt
2. Adjust the hanger position as shown in the gure
and then tighten the hex socket head bolt.
12
3
750 mm
(29-1/2″)
750 mm
(29-1/2″)
100-300 mm
(4″-11-3/4″)
1The hanger position from the ground
2The cutting tool position from the ground
3The horizontal distance between the hanger
and the unguarded part of the cutting tool
Correct handling of the tool
WARNING: Always position the tool on your
right-hand side. Correct positioning of the tool allows
for maximum control and will reduce the risk of seri-
ous personal injury caused by kickback.
WARNING: Be extremely careful to maintain
control of the tool at all times. Do not allow the
tool to be deected toward you or anyone in the
work vicinity. Failure to keep control of the tool
could result in serious injury to the bystander and the
operator.
WARNING: To avoid accident, leave more
than 15m (50 ft) distance between operators when
two or more operators work in one area. Also,
arrange a person to observe the distance between
operators. If someone or an animal enters the
working area, immediately stop the operation.
CAUTION: If the cutting tool accidentally
impacts a rock or hard object during operation,
stop the tool and inspect for any damage. If the
cutting tool is damaged, replace it immediately.
Use of a damaged cutting tool may result in serious
personal injury.
CAUTION: Remove the blade cover from the
cutter blade when cutting the grass.

19 ENGLISH
Correct positioning and handling allow optimum control
and reduce the risk of injury caused by kickback.
GRU02
GRU03
When using a nylon cutting head (bump & feed
type)
The nylon cutting head is a dual string trimmer head
provided with a bump & feed mechanism.
To feed out the nylon cord, tap the cutting head against
the ground while rotating.
1
► 1. Most e󰀨ective cutting area
NOTICE: The bump feed will not operate prop-
erly if the nylon cutting head is not rotating.
NOTE: If the nylon cord does not feed out while
tapping the head, rewind/replace the nylon cord
by following the procedures in the section for the
maintenance.
MAINTENANCE
WARNING: Always be sure that the tool is
switched o󰀨 and battery cartridge is removed
before attempting to perform inspection or main-
tenance on the tool. Failure to switch o󰀨 and remove
the battery cartridge may result in serious personal
injury from accidental start-up.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
Cleaning the tool
Clean the tool by wiping o󰀨 dust, dirt, or cut o󰀨 grass
with a dry cloth or one dipped in soapy water and wrung
out. To avoid overheating of the tool, be sure to remove
the cut o󰀨 grass or debris adhered to the vent of the
tool.
Replacing the nylon cord
WARNING: Use only the nylon cord with
diameter specied in this instruction manual.
Never use heavier line, metal wire, rope or the
like. Failure to do so may cause damage to the tool
and result in serious personal injury.
WARNING: Always remove the nylon cutting
head from the tool when replacing the nylon cord.
WARNING: Make sure that the cover of the
nylon cutting head is secured to the housing
properly as described below. Failure to properly
secure the cover may cause the nylon cutting head to
y apart resulting in serious personal injury.
Replace the nylon cord if it is not fed any more. The
method of replacing the nylon cord varies depending on
the type of the nylon cutting head.

20 ENGLISH
96-M10L
1
2
4
3
5
6
4 m (13 ft)
100 mm
(3-15/16″)