Hyundai HDBT521T User manual
1. SAFETY WARNINGS
Never modify a trimmer or cutter in any way.
Improper use of the machine can cause SERIOUS OR FATAL PERSONAL INJURY.
The engine exhaust form this product contains chemicals to cause cancer, birth
defects, of other reproductive harm.
Kickback and Related Warnings
a) Never place your hand near the rotating accessory.
b) Do not position your body in the area where power tool will move if kickback occurs.
c) Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the
accessory.
OPERATION OF QUICK RELEASE MECHANISM
Explanation of symbols
2. YOUR PRODUCT
a. Description
b. Technical data
（）
3. ASSEMBLY
INSTALLING HANDLE
INSTALLING THE CARTER OF PROTECTION
INSTALLING NYLON LINE CUTTER HEAD (FOR GRASS TRIMMING)
INSTALLING THE METAL BLADE (FOR BRUSHCUTTING)
When installing and removing the blade, pay attention to its sharp edges. Wear protective
gloves.
INSTALLING THE SHOULDER STRAP
Please do not use both functions at the same time. Before using the tool, check that the
tubes, cutting accessories and the harness are properly installed.
4. OPERATION
RULES FOR SAFE OPERATION
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” with care.
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 unit without proper instruction. Be sure the operator wears the foot,
leg, eye, face and hearing 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 “o” position when the engine idles, insure it 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.
WARNING △
!DANGER
In addition to head, eye, face and ear protectors shoes to protect your feet improve
your footing on slippery surfaces. Do not wear ties, jewelry, or loose, dangling clothing
which could be caught in the unit.
Do not wear open-toed footwear, or go bare-foot or bare legged. In certain situations
you must wear total face and head protection.
△
!DANGER ZONE
NO PERSON EXCEPT OPERATOR ALLOWED 15 METERS RADIUS DANGER ZONE. EYE,
EAR, FACE, FOOT, LEG AND BODY PROTECTION MUST BE WORN BY OPERATOR.
PERSONS IN ZONE OR RISK BEYOND DANGER ZONE SHOULD WEAR EYE PROTECTION
AGAINST THROWN OBJECTS. RISK DIMINISHES WITH DISTANCE FROM DANGER ZONE.
CUTTING WITHANYLON HEAD
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 A W A Y from
you and the debris shield. (See appropriate) This
results in the debris being thrown A W AY from
you.
WARNIN △
!DANCER
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.
WARNING △
!DANGER
Tilting the head to the wrong side will shoot the debris
TOWARDS you. If 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
Use only quality nylon monofilament line of the
diameter 2.5mm, 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 NYLON HEAD
TRIMMING:
This is feeding the trimmer carefully into the material
you wish to cut. Tilt the head slowly to direct debris
away from you. If cutting up to a barrier such as fence,
wall or tree, approach from an angle where any debris
ricocheting off the barrier will fly away from you, Move
the line head slowly until the grass is cut right up the
barrier, but do not jam (overfeed) the line into the
barrier. If trimming up to a wire mesh or chain linked
fence be careful to feed only up to wire. If you go to far
the line will snap off around the wire. Trimming can be
done to cut through weed stems one at a time. Place the
trimmer line head near the bottom of the weed-never
high up which could cause the weed to chatter and catch
the line. Rather than cut the weed right through, just use
the very end of the line to wear through the stem slowly.
WARNING△
!DANGER
Do not to use a steel blade for edging or scalping.
SCALPING AND ENGING:
Both of these are done with the line head tilted at a steep
angle Scalping is removing top growth leaving the earth
bear.
Edging is trimming the grass back where it has spread
over a sidewalk or drive way. During both edging and
scalping, hold the unit a steep angle and in a position
where the debris, and any dislodging dirt and stones,
will not come back towards you even if it ricochets off
the hard surface. Although the picture shows how to
edge and scalp every operator must find for himself the
angles which suits his body size and cutting situation.
WARNING △
!DANGER
Do not trim in any area where there are strands of
fencing wire. Wear protective safety protecting , Do not
cut where you cannot see what the cutting device is
cutting.
CUTTING WITH A BLADE
CUTTING
CUTTING WITH
WITH A
ABLADE
BLADE
3-tooth metal blade metal blade are provided with the machine
The metal blade is used for cutting brush and weeds up to 3/4” in diameter.
Use of saw blade with this machine is prohibited.
WARNING △
!DANGER
Do not cut with dull, cracked or damaged
meal blade.
Before cutting growth, inspect for
obstructions such as boulders, metal stakes
or strands of wire from broken fences. If
an obstruction can not be removed, mark
its location so that you can avoid it with
the blade. Rocks and metal will dull or
damage a blade. Wire can catch on the
blade head and flap around or be thrown
into the air.
WARNING △
!DANGER
DO NOT USE A BRUSH CUTTER
FOR CUTTING TREES.
WARNING △
!DANGER
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 debris shield should
be level in all directions. Harness the
unit on the right side of your body.
CUTTING WITH A BLADE
SCYTHING
SCYTHING WEEDS.
WEEDS. This is cutting by swinging the
blade in a level arc. It can quickly clear areas of field
grass and weeds. Scything should not be used to cut
large, tough weeds or woody growths.
NOTE
NOTE
Do not use a brush blade to cut trees which
exceed a diameter of 1/2 to 3/4 inches.
Scything can be done in both directions, or just in one
way which results in the debris being thrown away
from you.
That is using the side of the blade that it is rotating
away from you. Tilt down the blade slightly on this
same side. You will be hit by some debris if you
scythe in both directions.
Cut only with the side of the blade that the debris is
moving away from you.
If kickback occurs, the blade may be dull, or the
material so thick and hard that you should use other
tool instead of this machine.
Do not force the blade to cut. Do not change the
angle of cut after into the wood. Avoid using any
pressure or leverage which could cause the blade to
bind or crack .
FUEL & OIL MIXTURE
Never fill the fuel tank to the very top.
Never add fuel to the tank in a closed non-ventilated area.
Do not add fuel to this unit close to an open fire or sparks.
Be sure to wipe off spilled fuel before attempting to start engine.
Do not attempt to refuel a hot engine.
Fuel used for this model is a mixture of unleaded gasoline and approved engine lubricant.
When mixing gasoline with two-cycle engine oil, use only gasoline which contains NO
ETHANOL or METHANOL(Types of Alcohol) Use Branded 89 octane or higher
Unleaded gasoline known to be of good quality. This will help to avoid possible damage
to engine fuel lines and other engine parts.
MIXTURE RATIO IS 40:1
GASOLINE-40PART OIL-1 PART
Fuel mixture at the rate other than 40:1 may
cause damage to the engine, Ensure mixture
ratio is correct.
FUEL IMPORTANT
The engine uses two-stroke fuel, a mixture Two-stroke fuel may separate. Shake fuel
of gasoline and 2-stroke lubricant 40:1 container thoroughly before each use. Stored
fuel ages. Do not mix more fuel than you
expect to use within a month.
GASOLINE
Use branded 89 octane or higher unleaded
gasoline known to be of good quality.
FUEL AND OIL MIXTURE
STORING FUEL
Store fuel only in a clean, safe, approved Inspect fuel tank making sure that it is
container. Check and follow local clean and fill with fresh fuel. Use a mixture
ordinances. on type and location of of 40:1
storage container.
PREPARING FOR OPERATIONS
WHEN MIXING GASOLINE WITH TWO CYCLE ENGINE OIL, USE
ONLY GASOLINE WHICH CONTAINS NO ETHANOL OR METHANOL
(TYPES OF ALCOHOL). THIS WILL HELP TO A VOID 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 two
months. Fuel mixture stored longer than this will cause hard starting and
poor performance. If 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.
3. Never add fuel to the tank in a closed non-ventilated area.
4. Do not 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 is not leak.
5. Check to be sure the blade is not running in idling speed.
WARNING △
!DANGER
The engine exhaust from this product contains chemicals known to
cause cancer, birth defects, or other reproductive harm.
OPERATIONS
ENGINE STARTING AND
STOPPING PROCEDURES
STARTING COLD ENGINE
Move the stop switch to “START”
position.
1. Give a gentle push on the primer pump
repeatedly (7-10times) until fuel comes
into the primer pump.
2. Cold Starts: Pull lever up to close choke.
3. Pull starter handle until engine flash. fires.
4. Push choke lever inwards (excessive cranking with choke lever will cause
flooding engine making it difficult to start).
5. Pull starter handle until engine starts.
6. Allow engine to warm up for a few minutes before using.
STARTING WARM ENGINE
If fuel tank was not run dry, pull starter. one to three times and should
start.
DO NOT USE CHOKE
If fuel tank was run dry, after refilling repeat steps 3 thru 7 in.
STARTING COLD ENGINE.
STOPPING THE ENGINE
Move switch to STOP position
MAINTENANCE & CARE
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 CARBURETOR
NOTE
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 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.
CHECK SPARK PLUG
Do not attempt to remove the plug from a
hot engine in order to avoid possible
damage to the threads.
TROUBLE SHOOTING
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 gap 0.6-0.7mm (.023".028")
Fastening torque = 145-155kg.cm (125-135in.lb)
WARNING: Always cover the metal blade with the transportation guard
while transportation and storage.
TRANSPORT, HANDLING
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 is not leaked from tank.
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.
FAILURES such as difficulty in starting engine, irregularity in functions and
abnormality in performance can normally be prevented if careful attention is
paid to all operating instructions and maintenance procedures.
Should the engine not function properly, check the following;
That the fuel system is in good condition and fuel is flowing to the
engine.
The ignition system is in good condition and the spark plug, sparks
correctly;
Compression of the engine is adequate.
FAILURE TO START
Dispose of fuel in tank.
Insure that fuel is fresh and clean.
Check fuel filter to make sure it is clean. (Replace filter if necessary).
Make sure air filter elements are clean.
Install new, properly gapped spark plug.
When there is serious trouble with the unit, do not try to repair it yourself
but have your distributor or dealer do it for you.
TROUBLESHOOTING GUIDE
1. FAILURE TO START
symptom
probable cause
remedy
cylinder
compress
pressure
normal
spark
plug
spark
normal
fuel
system
abnormality
these is no fuel in tank
fuel filter obstruct
Add fuel in tank
Clean fuel filter
fuel
system
normal
fuel
fuel is too dirty
there is water in fuel
there is too much
mixture ratio is improper
instead fuel
instead fuel
tear down spark plug
and dry it
mixture peroration
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 oil deposits
replace spark plug
adjust spark gap 0.6-0.7mm
high
voltage
spark
abnormality
high voltage wire breach
or break off
coil looseness
replace or tighten
tighten
fuel
system
normal
Ignition
System
normal
compress
press
is
shortage
piston ring attrite
piston ring is broken
piston ring cementation
spark plug looseness
conjoint surface of the
cylinder and crank cast leak
replace a new
replace
eliminate
tighten
eliminate
Compress
normal
High voltage wire and spark
Plug contact badness
Stop switch failure or short
circuit
tighten the spark plug cap
repair or replace
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