NAKAYAMA 5221 Guide Bar Cover Instruction Manual
- June 14, 2024
- NAKAYAMA
Table of Contents
NAKAYAMA 5221 Guide Bar Cover
Product Specifications
- Model Numbers: PB4320, PB5221, PB5600, PB5450, PB7500, PB7700
- Art Numbers: 066606, 033783, 033790, 033967, 033813, 033806
- Version: v2.2
Product Usage Instructions
Starting the Tool:
- Move the stop switch to the “ON” position.
- Press and hold the safety lever.
- Squeeze the throttle lever to increase engine speed.
Stopping the Tool:
- Release the throttle lever.
- Release the safety lever.
- Move the stop switch to the “OFF” position.
Maintenance:
Regularly check and lubricate moving parts. Clean debris and dirt from the tool after each use. Refer to the user manual for detailed maintenance instructions.
Frequently Asked Questions
- Q: How do I refill the primer bulb?
- A: To refill the primer bulb, press it several times until it is full with fuel.
- Q: What is the recommended screw size for assembly?
- A: Use M5x20 screws for specific parts and follow the assembly instructions provided in the manual.
- Q: How do I adjust the choke lever?
- A: Move the choke lever to the “Closed” position for starting and to the “Open” position for running the tool.
PB4320 – PB5221 – PB5600 – PB5450- PB7500 – PB7700
ART NO: 066606 – 033783 – 033790 – 033967 – 033813 – 033806
v2.2
EN FR
IT el BG SL
RO HR
EN el
3 5
2
1 6
4
B
7
A
(4) (3)
C1 EN
C
D
(2)
(1)
Stop Stop Switch
Stop ON/OFF
Start Safety Lever
Throttle Lever
EEN
Start
E () EL
C1EL
F
2
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EN el
12
11
1
16 3
2
4
57 6
8 9
10
Screws M5x20
Safety guard bracket
Gear case
Shield
BEN
520
13
15 14
A
Lever ass’y 5×30 Screws
Bracket
CEN
D
5×60 Screws Cap (Upper)
5×30
Left hand ass y
CEL
F
BEL
Ignition switch
6×30
Throttle lock
Stop Start
Throttle trigger
EEN
ON/OFF
()
()
E EL
Safety lever
Stop Start
3
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EN el
Choke (Closed) Run (Open)
Choke lever Primer Bulb
()
GEN
12cm
G1
GEL
10cm
I
J 0.6 – 0.7mm
4
G2
R2-3mm R4-5mm
3-4mm
H
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K
(1) Grease (1)
FR
IT
3 5
2
1 6
4
B
7
A
(4) (3)
C1 FR
Vis de la poignée
Capuchon supérieur
C
D
(2)
Bracket
(1)
Poignée U
Stop
Interrupteur marche/arrêt
Start
Levier de sécurité
Levier d’accélérateur
EFR
Stop Interruttore on/off
Start Leva di sicurezza
Acceleratore Leva
EIT
C1IT
Vite della maniglia
Tappo superiore
Staffa
Maniglia U
F
5
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FR
IT
12
11
1
16 3
2
4
57 6
8 9
10
Vis M5x20
Support de protection de sécurité
Boîtier d’engrenages
Bouclier
BFR
Viti 520
Staffa di sicurezza
13
Scatola ingranaggi
15
14
Scudo
A
Assemblage du levier
5×30 Vis
5×60 Vis
Capuchon supérieur
Gruppo leva
Viti 5×30
Bracket
CFR
Assemblage de la main gauche
Staffa
CIT
D
F
BIT
Interrupteur d’allumage
Viti 6×30 Tappo superiore Blocage de
l’accélérateur
Stop Start
Assemblaggio a sinistra
Gâchette de l’accélérateur
EFR
Levier de sécurité
Interruttore di accensione Stop
Blocco dell’acceleratore
Start
Grilletto dell’acceleratore
Leva di sicurezza
E IT
6
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FR
IT
Starter (Fermé) Run (Ouvert)
Levier de starter Ampoule d’amorçage
Starter (Chiuso) Corsa (Aperta) Leva dello starter Lampadina primer
GFR
12cm
G1
GIT
10cm
I
J 0.6 – 0.7mm
7
G2
R2-3mm R4-5mm
3-4mm
H
K
(1) Graisse (1) Grasso
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BG SL
3 5
2
1 6
4
B
7
A
(4) (3)
C1 BG
C
D
(2)
(1)
Stop
/
Start
EBG
Stop Stikalo za vklop/izklop
Start
Varnostni vzvod
Rocica za plin
ESL
U
C1SL
Vijak rocaja
Zgornji pokrovcek
Nosilec
Rocaj U
F
8
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BG SL
12
11
1
16 3
2
4
57 6
8 9
10
M5x20
BBG
Vijaki 520
Varnostni nosilec
13
Ohisje menjalnika
15
Scit
14
A
5×30
5×60
Sestava vzvoda
Vijaki 5×30
CBG
Nosilec
CSL
D
F
BSL
Vijaki 6×30
Zgornji pokrovcek
Stop Start
Sestava na levi strani
EBG
Stikalo za vzig
Blokada dusilne lopute
Sprozilec dusilne lopute
Stop Start Varnostna rocica
E SL
9
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BG SL
() ()
Dusilka (zaprta) Run (odprto) Rocica dusilke Osnovna zarnica
GBG
12cm
G1
GSL
10cm
I
J 0.6 – 0.7mm
10
G2
R2-3mm R4-5mm
3-4mm
H
K
(1) (1) Mazivo
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RO HR
3 5
2
1 6
4
B
7
A
(4) (3)
C1 RO
urubul mânerului
Capacul superior
C
D
(2)
Suport
(1)
Mâner U
Stop Întreruptor pornit/oprit
Start
Pârghie de siguran
Maneta de acceleraie
ERO
Stop Prekidac za zaustavljanje
Pocetak
Sigurnosna poluga
Poluga gasa
EHR
C1HR
Vijak za rucku
Gornja kapa
Zagrada U rucka
F
11
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RO HR
12
11
1
16 3
2
4
57 6
8 9
10
uruburi 520
Suport de protecie de siguran
Cutie de
viteze
Scut
BRO
Vijci M5x20
Sigurnosni zastitni nosac
13
Mjenjac brzine
15
Stit
14
A
BHR
Ansamblu pârghie uruburi 5×30
Suport
CRO
uruburi 6×30
Capacul superior
Ansamblu stânga
Sklop poluge
Vijci 5×30 Vijci 5×60
Kapa (gornja)
Întreruptor de aprindere
Blocarea acceleraiei
Stop Start
Zagrada
CHR
Lijevi sklop
Declanatorul acceleraiei
ERO
Pârghie de siguran
Prekidac za paljenje Stop
Blokada gasa
Pocetak
Okidac gasa
Sigurnosna poluga
E HR
D
F
12
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RO HR
Supapa starterului (închis) Alergai (deschis)
Maneta starterului Bec de amorsare
Prigusnica (zatvorena) Trcanje (otvoreno)
Poluga prigusnice Temeljna zarulja
GRO
12cm
GHR
G1
10cm
I
J 0.6 – 0.7mm
13
G2
R2-3mm R4-5mm
3-4mm
H
K
(1) Unsoare (1) Mast
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EN
Safety instructions
This machine can cause serious injuries. Read the instructions carefully for
the correct handling, preparations, maintenance, starting and stopping of the
machine.
Be familiar with all controls and the proper use of the machine. Keep this
manual handy so that you may refer to it later whenever any questions arise.
Also note, if you have any questions which cannot be answered herein, contact
the dealer from whom you purchased the product. Never allow children or anyone
unable to fully understand the directions given in the manual to use the
machine.
Personal safety equipment When cutting, make sure to wear the following safety
equipment: 1. Helmet 2. Ear protectors 3. Protection goggles or face protector
4. Thick work gloves 5. Non-slip-sole work boots Do not wear loose clothing,
jewellery, short trousers, sandals, or go barefoot. Do not wear anything which
might be caught by a moving part of the unit. Secure hair so it is above
shoulder length.
Work place Never start the engine inside a closed room or building. Exhaust
gases contain dangerous carbon monoxide. Never use the product: A. When the
ground is slippery or when you can’t maintain a steady posture. B. At night,
at times of heavy fog, or at any other times when your field of vision might
be limited and it would be difficult to gain a clear view of the working area.
C. During rain storms, during lightning storms, at times of strong or gale-
force winds, or at any other times when weather conditions might make it
unsafe to use the product. · The machine may not be used unless it is
undamaged and functions properly. If the equipment or parts of it have become
defective, have it repaired by a specialized technician. · Always obey the
current national and international safety, health, and working regulations. ·
Do not operate the machine unless you did not find any faults on checking. If
a part has become defective, make sure to replace it before you use the
machine again. · The environment must be free of easily flammable and
explosive materials. · Do not overload the machine. Use the machine only for
its intended purpose. · Always work with care, and stay alert: Do not operate
the machine when you are tired, ill, or under the influence of alcohol, drugs
or medication, as you will no longer be able to operate the machine safely.
Before starting the machine · Make sure that no persons or animals are within
your work area when you start working. · Make sure there are no obstacles in
your work area. · Ensure that your machine has been fully and properly
assembled. · Check that the machine works properly and make sure, in
particular, that the chain rail or hedge trimmer head sits tightly and
properly, and that the On/Off switch works properly. Do not operate the
machine with a damaged or extensively worn cutting device. · The machine will
vibrate during operation. This may cause its screws and parts to loosen.
Therefore, check all screws and parts for tightness.
Using the product Cut only materials recommended by the manufacturer. And use
only for tasks explained in the manual. 1. Grip the handles firmly with both
hands using your whole hand. Place your feet slightly apart (slightly further
apart than the width of your shoulders) so that your weight is distributed
evenly across both legs, and always be sure to maintain a steady, even posture
while working. 2. Keep cutting attachment below waist level. 3. Maintain the
speed of the engine at the level required to perform cutting work, and never
raise the speed of the engine above the level necessary. 4. If the unit starts
to shake or vibrate, turn off the engine and check the whole unit. Do not use
it until the trouble has been properly corrected. 5. Keep all parts of your
body away from rotating cutting attachment and hot surfaces. 6. Never touch
the muffler, spark plug, or other metallic parts of the engine while the
engine is in operation or immediately after shutting down the engine. Doing so
could result in serious burns or electrical shock.
Maintenance · In order to maintain your product in proper working order,
perform the maintenance and checking operations described in the manual at
regular intervals. · Always be sure to turn off the engine before performing
any maintenance or checking procedures. The metallic parts reach high
temperatures immediately after stopping the engine · Use only original
replacement parts. Only these spare parts are guaranteed to be designed and
suitable for use with this machine. Using other spare parts will void your
warranty and may cause danger to yourself and your surroundings. · In the
event that any part must be replaced or any maintenance or repair work not
described in this manual must be performed, please contact our servicing
dealer for assistance. · Under no circumstances should you ever take apart the
product or alter it in any way. Doing so might result in the product becoming
damaged during operation or the product becoming unable to operate properly.
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EN
Handling fuel · The engine is designed to run on a mixed fuel, which contains
highly flammable gasoline. Never store cans of fuel or refill the tank of the
unit in any place where there is a boiler, stove, wood fire, electrical
sparks, welding sparks, or any other source of heat or fire which might ignite
the fuel. · Never smoke while operating the unit or refilling its fuel tank. ·
When refilling the tank, always turn off the engine and allow it to cool down.
Take a careful look around to make sure that there are no sparks or open
flames anywhere nearby before refuelling. · Wipe spilled fuel completely using
a dry rag if any fuel spillage occurs during refuelling. · After refuelling,
screw the fuel cap back tightly onto the fuel tank and then carry the unit to
a spot 3m or more away from where it was refuelled before turning on the
engine.
Transport and Storage · When you finish cutting in one location and wish to
continue work in another spot, turn off the engine, lift up the unit and carry
it paying attention to the blade. · When transporting or storing the machine
always fit the cutting device guard or guide bar cover. · When hand-carrying
the product, cover over the cutting part if necessary, lift up the product and
carry it paying attention to the blade. · Never transport the product over
rough roads over long distances by vehicle without removing all fuel from the
fuel tank. If doing so, fuel might leak from the tank during transport. ·
Protect the machine from damage when transporting it.
WARNING & DANGER All models trimmers and brush cutters can throw small stone,
metal or small objects as well as the material being cut. Read these ”Rules
for Safe Operation”. Follow the instructions in your operator’s manual.
Read the operator’s manual carefully. Be thoroughly familiar with the controls
and proper use of the unit. Know how to stop the unit and shut off the engine.
Know how to unhook a harnessed unit quickly. Never allow anyone to use the
unit without proper instruction. Be sure the operator wears the foot, leg,
eye, face and hearing protection. Do not rely on the debris shield on the unit
to protect your eyes from ricocheting or thrown objects. Keep the area clear
of bystanders, children and pets. Never allow children to operate or play with
the unit.
Do not allow anyone to enter the operating DANGER ZONE with you. The danger
zone is an area 15 meters in radius (about 16 paces) or 50 feet. Insist that
persons in the RISK ZONE beyond the danger zone wear eye protection from
thrown objects. If the unit must be used where there are unprotected people,
operate at a low throttle speed to reduce the risk of thrown objects. Move the
stop switch to “stop” position when the engine idles, hereby ensuring it is
reliable before cutting. Only may continue to operate the unit when stop
switch is in good condition. Routines for checking that the cutting attachment
stops turning when the engine idles. Hold the brush cutter with the right hand
on the trigger handle and the left hand on the left handle. Keep a firm grip
with both hands while in operation. Brush cutter should be held at a
comfortable position with the trigger handle about hip height. Maintain your
grip and balance on both feet. Position yourself so that you will not be drawn
off balance by the kick-back reaction of the cutting blade. Use the shoulder
harness at all times. Adjust both harness and harness clamp on the unit so
that the unit hangs a few inches above ground level. The cutting head and the
plastic debris shield should be level in all directions. Harness the unit on
the right side of your body.
WARNING & DANGER In addition to head, eye, face and ear protectors wear shoes
to protect your feet and improve your footing on slippery surfaces. Do not
wear ties, jewellery, or loose, dangling clothing which could be caught in the
unit. Do not wear open-toed footwear, or go barefoot or bare legged. In
certain situations you must wear total face and head protection. Pay attention
so as not to kick back and blade thrust.
Before starting the engine 1. The area within a perimeter of 15m of the person
using the product should be considered a hazardous area into which no one
should enter. If necessary yellow warning rope, warning signs should be placed
around the perimeter of the area. When work is to be performed simultaneously
by two or more persons, care should also be taken to constantly look around or
otherwise check for the presence and locations of other people working so as
to maintain a distance between each person sufficient to ensure safety. 2.
Check the condition of working area to avoid any accident by hitting hidden
obstacles such as stumps, stones, cans, or broken glass. Remove any obstacle
before beginning work. 3. Inspect the entire unit for loose fasteners and fuel
leakage. Make sure that the cutting attachment is properly installed and
securely fastened. 4. Be sure the debris guard is firmly attached in place. 5.
Always use the shoulder strap. Adjust the strap for comfort before starting
the engine. The strap should be adjusted so the left hand can comfortably hold
the handlebar grip approximately waist high.
Starting the engine 1. Keep bystanders and animals at least 15m away from the
operating point. If you are approached, immediately stop the engine. 2. The
product is equipped with a centrifugal clutch mechanism, so the cutting
attachment begins to rotate as soon as the engine is started by putting the
throttle into the start position. When starting the engine, place the product
onto the ground in a flat clear area and hold it firmly in place so as to
ensure that neither the cutting part nor the throttle come into contact with
any obstacle when the engine starts. Never place the throttle into the high-
speed position when starting the engine. 3. After starting the engine, check
to make sure that the cutting attachment stops rotating when the throttle is
moved fully back to its original position. If it continues to rotate even
after the throttle has been moved fully back, turn off the engine and take the
unit to your authorized Nakayama servicing dealer for repair.
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Technical Data
Model: Type: Displacement:
Horsepower:
Anti-vibration System:
Shaft dimensions:
Net weight:
PB4320* NAKAYAMA
43cc 1.8hp N/A
26mm 7.4kg
PB5221 NAKAYAMA
52cc 2hp
N/A
PB5600/PB5450
PB7500
PB7700
NAKAYAMA PRO NAKAYAMA PRO NAKAYAMA PRO
52cc
63.3cc
63.3cc
2.3hp / 2hp
3hp
3hp
YES / N/A
N/A
YES
28mm*1.5m 7.6kg
28mm*1.5m 8.5kg
28mm*1.5m 8.8kg
28mm*1.5m 10.8kg
*PB4320: Two-stroke air-cooled engine, Loop handle, Double belt, Automatic head, 255mm (3T) blade
- The manufacturer reserves the right to make minor changes to product design and technical specifications without prior notice unless these changes significantly affect the performance and safety of the products. The parts described / illustrated in the pages of the manual that you hold in your hands may also concern other models of the manufacturer’s product line with similar features and may not be included in the product you just acquired.
- To ensure the safety and reliability of the product and the warranty validity, all repair, inspection, repair or replacement work, including maintenance and special adjustments, must only be carried out by technicians of the authorized service department of the manufacturer.
- Always use the product with the supplied equipment. Operation of the product with non-provided equipment may cause malfunctions or even serious injury or death. The manufacturer and the importer shall not be liable for injuries and damages resulting from the use of non-conforming equipment.
Installation
Identify the parts illustrated on pages 2-3 and follow the corresponding
instructions depending on the type of your brush cutter.
Description of main parts (Picture A, page 2 or 3)
1. CUTTING HEAD: Equipped with a cutting Disk or a replaceable nylon trimming
line that advances when the trimmer head is tapped against the ground while
the head is turning at normal operating speed. 2. DRIVE SHAFT ASSEMBLY:
Contains a specially designed inner flexible drive shaft. 3. THROTTLE TRIGGER:
Spring loaded to return to idle when released. When accelerating, press
trigger gradually for best operating technique .Do not hold trigger while
starting. 4. IGNITION SWITCH: Move switch forward to stop, back to start. 5.
THROTTLE LOCKOUT: Before acceleration, compress it please. 6. U-HANDLE: this
handle can be adjusted at you convenience for comfort. 7. HARNESS ASSEMBLY: a
attachment which hang the machine on the operator and adjustable in length. 8.
AIR CLEANER COVER: Contains replaceable felt element. 9. FUEL TANK LID. 10.
FUEL TANK: Contains fuel and fuel filter. 11. Priming Bulb: Pressing the
priming bulb pumps( 7 to 10 times before starting),will remove all air and
stale fuel from fuel system and bring fresh fuel to the carburetor. 12. CHOKE:
the choke control is located on the top of the filter cover. COLD STARTS: Pull
lever up to close choke for cold starts. Push lever down for RUN position.
13.DEBRIS SHIELD: Mounted just above the cutting attachment. Helps protect
operator by deflecting debris produced during the trimming operation. Do not
operate unit without shield. 14. CUT-OFF KNIFE: Trims nylon filament to the
correct length-7″ ,head to end of line-when nylon trimming head is bumped on
the ground during the operation of advancing the line .If trimmer is operated
without a cut-off knife the line becomes too long(more than 7″) the operating
speed will slow down the engine, this will overheat or damage the engine. 15.
BLADE: Circular blade for grass, weed or brush cutting applications. Harness,
plastic shield and U-Handles required for blade operation. 16. THROTTLE LOCK
(not included on all models)
Assembly and main adjustments Installing the handle (Picture C, page 2)
· Loosen the 4 bolts on the upper cap and insert the handle. Re-tighten the
bolts securely.
Installing the handle (Picture C, page 3)
· Install handle in bracket. Position handle in a comfortable operating
position and tighten the M5X30 and M6X50 screws. Warning! Do not attempt to
disassemble the two special screws. The two clamps position has been adjusted
at a suitable place,do not attempt to remove or move them. Otherwise,it can
result in serious personal injury.
Installing the handle (Picture C1, page 2) · Install handle in bracket.
Position handle in a comfortable operating position and tighten U Handle Screw
Assy.
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Installing debris guard (Picture B, page 2) · Attach the debris guard with the
bolts provided to the shaft. Installing debris guard (Picture B, page 3)
Install the safety cover on the shaft with the safety cover bracket and the
screws provided. Tighten the screws after setting the safety cover bracket at
the appropriate position.
Caution! Always place the inner ring nut in front of the disc or the nylon
trimming heads on the drive shaft of the angle transmission.
Installing the blade (Picture D, page 2) 1. Put the angled bar (1) into the
side holes of the inner holder and the gear case. 2. Remove the nut (left-
handed) and the outer holder (3) from the gear shaft. 3. Put the blade onto
the inner holder (2). make the marked side face the holder. 4. Put the outer
holder (3) onto the gear shaft making the recessed side face the blade. 5.
Fasten the blade by the nut and the cover (4). Warning! Always wear protective
gloves when handling the blade and place the blade guard when applicable.
Installing the blade (Picture D, page 3) Insert the hex key (2) into the
specific hole in the angle transmission (3) and rotate the blade (1) by hand
until the hex key enters the inner hole, blocking rotation. Unscrew the nut
(5) in a clockwise direction. Pull out the outer ring-nut (7) and remove the
blade (1). Ensure that the grooves in the inner ring-nut (8) match-up
perfectly with the angle transmission (3). Fit the blade (1) and outer ring
-nut (7). Refit the nut (5), fully tightening it in an anticlockwise
direction. Remove the hex key (2). Warning! Always wear protective gloves when
handling the blade and place the blade guard when applicable.
Installing line head (Picture F, page 2) 1. While locking the gear shaft by
inserting the supplied tool into the upper holder on the gear box, loosen and
remove the nut (left-handed). 2. Detach the cover (1), fit the line head
assembly to the gear shaft and hand tighten it securely.
Installing line head (Picture F, page 3) Insert the hex key (2) into the
specific hole in the angle transmission (3) and rotate the cutting line head
(1) by hand until the hex key enters the inner hole, blocking rotation. Ensure
that the grooves in the inner ring-nut (4) match perfectly with the angle
transmission(3). Fit the cutting line head (1) turning in an anticlockwise
direction. Remove the hex key (2).
Line head spool replacement: (Pictures G1 and G2)
Balancing the unit 1. Put on strap and attach unit to strap. 2. Slide clamp up
or down until unit balances with head apart from the ground when using it.
Before operation
When mixing gasoline with two cycle engine oil, use only gasoline which
contains no ethanol or methanol (types of alcohol). this will help to avoid
possible damage to engine fuel lines and other engine parts. Do not mix
gasoline and oil directly in the engine fuel tank. IMPORTANT: Failure to
follow proper fuel mix instructions may cause damage to the engine. 1. When
preparing fuel mixture, mix only the amount needed for the job you are to do.
Do not use fuel that has been stored longer than 1 month. Fuel mixture stored
longer than this will cause hard starting and poor performance. lf fuel mix
has been stored longer than this time, it should be removed and filled with
fresh mixture.
WARNING! DANGER 2. Never fill the fuel tank to the very top (under 3/4 of the
tank) 3. Never add fuel to the tank in a closed non-ventilated area. 4. Don’t
add fuel to this unit close to an open fire or sparks. 5. Be sure to wipe off
spilled fuel before attempting to start engine 6. Do not attempt to refuel a
hot engine.
Check points before operation 1. Check for loose bolts, nuts and fittings. 2.
Check the air cleaner for dirt. Clean the air filter of all dirt, etc. before
operation. 3. Check to be sure that protector is securely in place. 4. Check
to be sure that fuel is not leaking. 5. Check to be sure that blade is not
cracked.
WARNING! DANGER! The engine exhaust from this product contains chemicals known
to cause cancer, birth defects, or other reproductive harm.
17
EN
Fuel Warning: Gasoline is very flammable. Avoid smoking or bringing any flame
or sparks near fuel. Wipe up all spills before starting the engine. Make sure
to stop the engine and allow it cool before starting the engine. Keep open
flames away from the area where fuel is handled or stored. Important: Never
use oil for 4 cycle engine use or water cooled 2-cycle engine. Never use “FUEL
WITH NO OIL (RAW GASOLINE)”. Never use fuel laced with water. Mixed fuel which
have been left unused for period of one month or more may clog the carburetor
or result in the engine failing to operate properly. Put remained fuel into an
air-tight container and keep it in the dark and cool room. Please ask for
“mixed gasoline for air-cooled 2-cycle engines” at your nearest gas station,
or use fuel made by putting unleaded 94 octane gasoline or higher and air-
cooled 2-cycle special engine oil into a mixing container in accordance with
the following ratios and then shaking to mix well.
Mixing ratios: Use a special type 2-cycle oil (30ml of oil for each 1L of
unleaded gasoline 94 octanes or higher).
Fuelling the unit 1. Untwist and remove the fuel cap. Rest the cap on a
dustless place. 2. Put fuel into the fuel tank to 80% of the full capacity. 3.
Fasten the fuel cap securely and wipe up any fuel spillage around the unit.
Operatio
Engine starting and stopping procedures Starting a cold engine (Picture E,
page 2 & picture G) 1. Move the stop switch to “START” position. 2. Give a
gentle push on the primer pump repeatedly (7-10 times) until fuel comes into
the primer pump. 3. Cold Starts: Pull lever up to close choke. 4. Pull starter
handle until engine false fires. If fuel tank was not run dry, pull Starter.
5. Push choke lever inwards (excessive cranking with choke lever will cause
flooding of engine making it difficult to start). 6. Pull starter handle until
engine starts. 7. Allow engine to warm up for a few minutes before using one
to three times and engine should start.
Starting a warm engine (Picture E, page 2 & picture G) If the fuel tank was
not run dry, pull starter rope one to three times and engine should start.
Warning! DO NOT USE CHOKE! If the fuel tank was run dry, after refilling
repeat steps 3 – 7 in starting cold engine.
Starting a cold engine (Picture E, page 3 & picture G) 1. Move the ignition
switch to “START”. 2. Give a gentle push on the primer pump repeatedly (7 -1O
times) until fuel comes into the primer pump. 3. Pull the chock lever up to
close choke. 4. Move the throttle trigger and keep it in position with the
throttle lock (if present). 5. Pull starter handle until engine false fires.
6. Push choke lever inwards( excessive cranking with choke lever will cause
flooding of engine making it difficult to start.) 7. Pull starter handle until
engine starts. 8. When the engine is started, disconnect the starter by
turning the choke lever to “RUN “. 9. Disengage the throttle lock (if present)
pressing the throttle trigger briefly. 10. Allow engine to warm up for a few
minutes before using.
Starting a warm engine (Picture E, page 3 & picture G) The choke lever to the
“RUN” · If the fuel tank was not run dry, pull starter one to three times and
engine should start. · If fuel tank was run dry, after refilling repeat steps
1-2-7 .
Warning: If the starter rope is been pulled repeatedly with the choke on, it
may flood the engine and make starting difficult. If you have flooded the
engine, remove the spark plug and gently pull the handle on the starter rope
to eliminate any excess fuel; then dry the spark plug electrodes and replace
it on the engine.
Stopping the engine · Release the throttle trigger and allow the engine to run
idle for a few seconds. · Move switch to STOP position.
Using the shoulder harness 1. Assemble and adjust the shoulder harness and
belt. 2. Adjust the shoulder-harness button,and move the hook to your waist,
then adjust the belt (if a belt is included). 3. Hang the latch tab on the
harness hook. 4. If he brush cutter doesn’t balance, then adjust the harness
hanger, and the handlebar, until the it balances.
WARNING! The hook is situated at your right hip,and the quick-release latch is
situated at the outside. Before using, please check the shoulder harness and
confirm it is OK. Encounter danger,please stop the brush cutter
immediately,and pull the quick-release latch tab, the brush cutter will be
depart from your body.
18
WWW.NIKOLAOUTOOLS.COM
EN
Cutting with a nylon head The CUT – OFF KNIFE will be on the right side of the
debris shield. If the brush cutter is equipped with an bump feet head in order
to increase the length of the cutting line press the cutting head on the
ground by guiding it downwards.
WARNING! The proper debris shield must be in place on the unit when nylon
cutting line is used. The cutting line can flap around if too much line is
exposed. Always use the plastic debris shield with cut-off knife when using
nylon cutting heads.
For nearly all cutting, it is good to tilt the line head so that contact is
made on the part of the line circle where the line is moving away from you and
the debris shield.
WARNING&DANGER Tilting the head to the wrong side will shoot the debris
TOWARDS you. lf the line head is held flat to the ground so that cutting
occurs on the whole line circle, debris will be THROWN at you, drag will slow
the engine down, and you will use up a lot of line.
WARNING&DANGER Never use wire or wire-reinforced line in place of nylon
trimmer line. Load your nylon line cutting head only with nylon trimmer line
of the proper diameter.
WARNING&DANGER Use extreme caution when operating over bare spots and gravel,
because the line can throw small rock particles at high speeds. Debris shields
on the unit cannot stop objects which bounce or ricochet off hard surfaces.
Cutting with a blade There are many different types of blades, however the two
most commonly used are the following. BRUSH CUTTER BLADE is used for cutting
brush and weeds up to 3/4″ in diameter.
DANGER! DO NOT TOUCH THESE TYPES OF OBJECTS WITH BLADE: Utility wi es, metal
stakes, rubber, rocks, masonry, fences. NEVER USE A BRUSH CUTTER FOR CUTTING
TREES. Do not cut with dull, cracked or damaged metal blade. Before cutting
growth, inspect for obstructions such as boulders, metal stakes or strands of
wire from broken fences. If an obstruction cannot be removed, mark its
location so that you can avoid it with the blade. Rocks and metal will dull or
damage a blade. Wires can catch on the blade head and flap around or be thrown
into the air. Blade thrust is the reaction which may occur when the spinning
blade contacts anything it cannot cut. This contact may cause the blade to
stop for an instant ,and suddenly “thrust” the unit away from the object that
was hit. This reaction can be violent enough to cause the operator to lose
control of the unit. Blade thrust may occur without warning if the blade
snags, stalls or binds. This is more likely to occur in areas where it is
difficult to see the material being cut. For cutting ease and safely, approach
the weeds being cut from the right to the left,in the event that an unexpected
object or woody stock is encountered,this could minimise the blade thrust
reaction.
Maintenance and care
Refilling trimming line 1. For replacement line, use a diameter of up to 3mm.
The spool is capable for a line up to 6m(20ft) on the 10cm(4″) head. Avoid
using a larger line as it may cut down the trimming performance. For safety
reasons, do not use metal reinforced line. 2. Pinch the slotted area on the
both sides of the spool housing to unhook the bottom cap. 3. Take out the
spool and pull off the old line. Put one end of new line through the spool
holes and pull it until the length is equal between each part of the line. 4.
Wind up the line in the correct direction as indicated on the spool. 5. Hook
each end of the line in the slot on the edge of the spool, and then put the
ends through the eyelets on the housing. Make sure that the spring and the
washers are in place. 6. While holding the spool against the housing, pull the
line ends to release them from the slot. 7. Line up the slot on the bottom cap
with the hook on the housing, press the cap against the housing until it
clicks. Fast winding thread heads (not included with all models): Align the
spool holes with the corresponding head holes, align the two ends of the
cutting thread and rotate the head by winding the cutting thread.
Blade (Picture H) · Check the blade and the fasteners for looseness, cracking,
or bending. · Check the cutting edges and reform with a flat file 1. Keep the
end corner sharp. 2. Round the root of the edge, using round file. 3. Do not
use water when using a grinder. · It is recommended that filing should be done
by professionals. · Especially regarding filing the saw blade, Leave it to the
professionals.
WARNING: Make sure that the engine has stopped and is cool before performing
any service to the machine. Contact with moving cutting head or hot muffler
may result in a personal injury.
19
EN
Air Filter Accumulated dust in the air filter will reduce engine efficiency.
Increase fuel consumption and allow abrasive particles to pass into the
engine. Remove the air filter as Often as necessary to maintain in a clean
condition. Light surface dust can readily be removed by tapping the filter.
Heavy deposits should be washed out in suitable solvent. Remove filter cover
by loosening air filter cover knob.
Adjusting the Carburetor Do not adjust carburetor unless necessary. If you
have trouble with the carburetor, see your dealer. Improper adjustment may
cause engine damage and void warranty.
Fuel filter Fuel tank is fitted with a filter. Filter is situated at the free
end of fuel pipe and can be picked out through fuel port with a piece of
hooked wire or the like. Check the fuel filter periodically. Do not allow dust
to enter into fuel tank. Clogged filter will cause difficulty in starting
engine or abnormalities in engine performance. · When filter is dirty, replace
the filter. · When the inside of the fuel tank is dirty, it can be cleaned by
rinsing the tank out with gasoline.
Checking the spark plug (Picture J) Do not attempt to remove the plug from a
hot engine in order to avoid possible damage to the threads. Clean or replace
the plug if fouled with heavy oily deposits. Replace the plug if the center
electrode is worn rounded at the end.
Spark plug gap: 0.6-0.7mm
Gear Case (Picture K) · The reduction gears are lubricated by a special angled
transmission grease, in the gear case. Supply new grease every 25 hours of use
or more often depending on the job condition. · Remove the bolt of the grease
nipple and the bolt opposite side of the grease nipple. Install new grease
into the grease nipple to arrange for old grease to exit from the opposite
side.
Muffler Inspect periodically, the muffler for loose fasteners, any damage or
corrosion. If any sign of exhaust leakage is found, stop using the machine and
have it repaired immediately. Note that failing to do so may result in the
engine catching on fire.
PROCEDURES TO BE PERFORMED AFTER EVERY 100 HOURS OF USE 1. Remove the muffler,
insert a screwdriver into the vent, and wipe away any carbon build-up. Wipe
away any carbon build-up on the muffler exhaust vent and cylinder exhaust port
at the same time. 2. Tighten all screws, bolts, and fittings. 3. Check to see
if any oil or grease has worked its way in between the clutch lining and drum,
and if it has, wipe it away using oil-free, lead-free gasoline.
Transport & Storage
· The engine should be turned off when the unit is moved between work areas. ·
After the engine has stopped ,the muffler is still hot. Never touch hot Parts
such as the muffler. · Confirm that the fuel has not leaked from the tank. ·
Allow the engine to cool. Empty the fuel tank and secure the unit from moving
before transporting in a vehicle, if the blade is fitted, always use the blade
guard.
WARNING! DANGER! · Always place the blade guard on the blade when the unit is
not in use. Remove the blade guard before using the unit. If not removed the
blade guard could become a thrown object as the blade begins to turn.
WARNING! DANGER! · Please empty the fuel tank before transporting,to avoiding
the engine leaked. · For avoiding the cutting attachment damaged the brush
cutter and people, please removed the cutting attachment, and at the same
time, resile the brush · Cutter as factory state ,and then casting all parts
into the package. · Before transporting, all parts should be packed and
validated safe.
Extended storage · Inspect, clean and repair unit if necessary. · Remove all
fuel from tank. · Start engine-This will consume all fuel in fuel line and
carburetor. · Remove spark plug and pour one tea spoon of clean motor oil into
spark plug hole of cylinder-replace spark plug. · Store in clean, dry, dust
free area.
WARNING! DANGER! · Do not store in a closed area where fuel vapours can reach
an open flame from hot water heaters, furnaces, etc. Store in a locked, well
ventilated area only.
20
EN
Troubleshooting
1. FAILURE TO START
Symptom
Cylinder compression pressure normal
Spark plug spark normal
Fuel system abnormality
Possible cause
There is no fuel in tank fuel filter obstructed
Remedy
Add fuel in tank Clean fuel filter
Fuel
Fuel
system
normal
Fuel is too dirty. There is water in fuel. There is too much fuel in the cylinder. Mixture ratio is improper.
Replace the fuel. Replace the fuel. Remove the spark plug and dry it. Mixture proration.
Fuel system normal
High voltage wire spark normal
Spark plug
Spark plug fouled with oily deposits. Spark plug insulation damage. Spark gap is too large or small.
Clean the oily deposits. Replace the spark plug. Adjust the spark plug gap to 0.6-0.7mm.
High voltage wire spark High voltage wire breach or break off.
abnormality
Coil looseness
Replace or tighten. Tighten.
Fuel system normal Ignition system normal
Compression pressure is inadequate
Piston ring attrite Piston ring is broken Piston ring cementation Spark plug looseness. Conjoint surface of the cylinder and crank case leak
Replace with a new one Replace Eliminate Tighten Eliminate
Compression normal
High voltage wire and spark plug contact Tighten the spark plug cap.
poor
Repair or replace.
Stop switch failure or short circuit.
2. LOW OUTPUT
Symptom
Flameout when speedup The smoke is thin, carburetor spout backward.
Possible cause
Fuel filter clogged Low fuel level Muffler fouled with oily deposits
Compress press is inadequate
Piston, piston ring, cylinder attrite
Engine leak
Conjoint surface of the cylinder and crankcase leak
The end of two crank shaft leak
Damaged seal
Engine overheats Burning chamber fouled with oily deposits
Remedy Clean fuel filter, clean fuel road, adjust carburetor
Replace piston, piston ring
Repair
Replace seal
Avoid using it for a long time, in high speed and heavy load. Clean the oily
deposits
21
EN
3. ENGINE RUNNING UNSTABLE
Symptom
Possible cause
There are knock sound in engine
Piston, piston ring, Cylinder attrite, Piston pin, piston attrite, Bearing of crank shaft attrite
Remedy
Replace piston, piston ring Replace piston pin, piston Replace bearing
There are metal knock sound
Engine overheats Burning chamber fouled with oily deposits Gasoline branded is ufit
Engine ignition break off
There is water in fuel Spark gap is wrong Coil gap is wrong
Replace fuel Adjust spark gap 0.6-0.7mm Adjust coil gap 0.3-0.4mm
4. THE ENGINE SUDDENLY STOPPED
Possible cause
Fuel has been used up Spark plug fouled with oily deposits and short circuit
High voltage wire fall off
Remedy
Add fuel Clean the oily deposits Connect
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