Ayce YT4302-09 User manual

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Original instructions
INSTRUCTION MANUAL
Electrical Chain saw
YT4302-09/BG PRO CS2400 - 17
2400W

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Description of the symbols
WARNING – To reduce the risk of injury, user must read instruction manual.
These symbols indicates the requirement of wearing ear protection, eye protection,
dust mask and gloves when using the product.
Wear safety boots
Do not expose to rain
Remove plug from the mains immediately if the cable is damaged or cut
Make sure the “chain brake” is disengaged.
Conforms to relevant safety standards.
This class II symbol indicates that the product is correctly insulated.
Grounding this machine is therefore unnecessary.
Indicates danger, warning, or caution.

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The crossed-out wheeled bin symbol indicates that the item should be disposed of
separately from household waste. The item should be handed in for recycling in
accordance with local environmental regulations for waste disposal. By separating a
marked item from household waste, you will help reduce the volume of waste sent to
incinerators or land-fill and minimize any potential negative impact on human health
and the environment.
General tool safety warnings
WARNING Read all safety warnings and all instructions.
Failure to follow the warnings and instructions may result in
electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term "tool" in the warnings refers to your mains-operated (corded)
tool or battery-operated (cordless) tool.
1) Work area safety
a) Keep work area clean and well lit. Cluttered or dark areas invite
accidents.
b) Do not operate tools in explosive atmospheres, such as in the
presence of flammable liquids, gases or dust. Tools create
sparks which may ignite the dust or fumes.
c) Keep children and bystanders away while operating tool.
Distractions can cause you to lose control.
2) Electrical safety
a) Tool plugs must match the outlet. Never modify the plug in any
way. Do not use any adapter plugs with earthed (grounded)
tools. Unmodified plugs and matching outlets will reduce risk of
electric shock.
b) Avoid body contact with earthed or grounded surfaces, such
as pipes, radiators, ranges and refrigerators. There is an
increased risk of electric shock if your body is earthed or grounded.

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c) Do not expose tools to rain or wet conditions. Water entering a
tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for carrying, pulling
or unplugging the tool. Keep cord away from heat, oil, sharp
edges or moving parts. Damaged or entangled cords increase the
risk of electric shock.
e) When operating a tool outdoors, use an extension cord
suitable for outdoor use. Use of a cord suitable for outdoor use
reduces the risk of electric shock.
f) If operating a tool in a damp location is unavoidable, use a
residual current device (RCD) protected supply. Use of an RCD
reduces the risk of electric shock.
3) Personal safety
a) Stay alert, watch what you are doing and use common sense
when operating a tool. Do not use a tool while you are tired or
under the influence of drugs, alcohol or medication. A moment
of inattention while operating tools may result in serious personal
injury.
b) Use personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
c) Prevent unintentional starting. Ensure the switch is in the
off-position before connecting to power source and/or battery
pack, picking up or carrying the tool. Carrying tools with your
finger on the switch or energising tools that have the switch on
invites accidents.
d) Remove any adjusting key or wrench before turning the tool
on. A wrench or a key left attached to a rotating part of the tool may
result in personal injury.
e) Do not overreach. Keep proper footing and balance at all
times. This enables better control of the tool in unexpected
situations.

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f) Dress properly. Do not wear loose clothing or jewellery. Keep
your hair, clothing and gloves away from moving parts. Loose
clothes, jewellery or long hair can be caught in moving parts.
g) If devices are provided for the connection of dust extraction
and collection facilities, ensure these are connected and
properly used. Use of dust collection can reduce dust-related
hazards.
4) Tool use and care
a) Do not force the tool. Use the correct tool for your application.
The correct tool will do the job better and safer at the rate for which
it was designed.
b) Do not use the tool if the switch does not turn it on and off. Any
tool that cannot be controlled with the switch is dangerous and must
be repaired.
c) Disconnect the plug from the power source and/or the battery
pack from the tool before making any adjustments, changing
accessories, or storing tools. Such preventive safety measures
reduce the risk of starting the tool accidentally.
d) Store idle tools out of the reach of children and do not allow
persons unfamiliar with the tool or these instructions to
operate the tool. Tools are dangerous in the hands of untrained
users.
e) Maintain tools. Check for misalignment or binding of moving
parts, breakage of parts and any other condition that may
affect the tool’s operation. If damaged, have the tool repaired
before use. Many accidents are caused by poorly maintained tools.
f) Keep cutting tools sharp and clean. Properly maintained cutting
tools with sharp cutting edges are less likely to bind and are easier
to control.
g) Use the tool, accessories and tool bits etc. in accordance with
these instructions, taking into account the working conditions
and the work to be performed. Use of the tool for operations
different from those intended could result in a hazardous situation.
5) Service

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a) Have your tool serviced by a qualified repair person using only
identical replacement parts. This will ensure that the safety of the
tool is maintained.
b) Caution!
If the replacement of the supply cord is necessary, this has to be
done by the manufacturer or his agent in order to avoid a safety
hazard.
Special safety for chain saw
Keep all parts of the body away from the saw chain when the
chain saw is operating. Before you start the chain saw, make
sure the saw chain is not contacting anything. A moment of
inattention while operating chain saws may cause entanglement of
your clothing or body with the saw chain.
Always hold the chain saw with your right hand on the rear
handle and your left hand on the front handle. Holding the chain
saw with a reversed hand configuration increases the risk of personal
injury and should never be done.
Hold the tool by insulated gripping surfaces only, because the
saw chain may contact hidden wiring or its own cord. Saw chains
contacting a "live" wire may make exposed metal parts of the tool
"live" and could give the operator an electric shock.
Wear safety glasses and hearing protection. Further protective
equipment for head, hands, legs and feet is recommended.
Adequate protective clothing will reduce personal injury by flying
debris or accidental contact with the saw chain.
Do not operate a chain saw in a tree. Operation of a chain saw while
up in a tree may result in personal injury.
Always keep proper footing and operate the chain saw only when
standing on fixed, secure and level surface. Slippery or unstable
surfaces such as ladders may cause a loss of balance or control of
the chain saw.
Hold the tool by insulated gripping surfaces only, because the
saw chain may contact hidden wiring or its own cord. Saw chains

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contacting a "live" wire may make exposed metal parts of the tool
"live" and could give the operator an electric shock.
When cutting a limb that is under tension be alert for spring back.
When the tension in the wood fibers is released the spring loaded limb
may strike the operator and/or throw the chain saw out of control.
Use extreme caution when cutting brush and saplings. The
slender material may catch the saw chain and be whipped toward you
or pull you off balance.
Carry the chain saw by the front handle with the chain saw
switched off and away from your body. When transporting or
storing the chain saw always fit the guide bar cover. Proper
handling of the chain saw will reduce the likelihood of accidental
contact with the moving saw chain.
Follow instructions for lubricating, chain tensioning and
changing accessories. Improperly tensioned or lubricated chain may
either break or increase the chance for kickback.
Keep handles dry, clean, and free from oil and grease. Greasy,
oily handles are slippery causing loss of control.
Cut wood only. Do not use chain saw for purposes not intended.
For example: do not use chain saw for cutting plastic, masonry
or non-wood building materials. Use of the chain saw for
operations different than intended could result in a hazardous
situation.
Causes and operator prevention of kickback:
Kickback may occur when the nose or tip of the guide bar touches an
object, or when the wood closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a sudden reverse reaction, kicking
the guide bar up and back towards the operator.
Pinching the saw chain along the top of the guide bar may push the guide
bar rapidly back towards the operator.
Either of these reactions may cause you to lose control of the saw which
could result in serious personal injury. Do not rely exclusively upon the
safety devices built into your saw. As a chain saw user, you should take
several steps to keep your cutting jobs free from accident or injury.

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Kickback is the result of tool misuse and/or incorrect operating
procedures or conditions and can be avoided by taking proper
precautions as given below:
Maintain a firm grip, with thumbs and fingers encircling the chain
saw handles, with both hands on the saw and position your body
and arm to allow you to resist kickback forces. Kickback forces
can be controlled by the operator, if proper precautions are taken. Do
not let go of the chain saw.
Do not overreach and do not cut above shoulder height. This
helps prevent unintended tip contact and enables better control of the
chain saw in unexpected situations.
Only use replacement bars and chains specified by the
manufacturer. Incorrect replacement bars and chains may cause
chain breakage and/or kickback.
Follow the manufacturer’s sharpening and maintenance
instructions for the saw chain. Decreasing the depth gauge height
can lead to increased kickback.
The first time user should request an experienced operator in the use
of the chainsaw and the protective equipment, and should be have the
initial practice cutting logs on a saw horse or cradle.
In the interest of personal safety it is highly recommended: when using
the chain saw always use it with residual current device (RCD) 30 mA
or less.
Position the cord so that it will not be caught on branches and the like,

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during cutting.
Attention for usage of electric chain saw
Before any cutting, you must wait for the saw chain running to reach a stable
speed.
When cutting wood, please do not press the chain saw with big force.
During cutting, if the saw chain is stuck in the wood, please stop the saw
immediately, and take the saw out of the wood carefully. Restart the saw till the
saw chain reaches a stable speed, and then recut again.
Operate the machine properly, activate the trigger completely to avoid brake lever
touching torsion spring during use. And do not work continuously for a long time
to avoid overuse fatigue.
Important safety
• How to read symbols and colors (Fig. 1)
Warning: RED Used to warn that an unsafe procedure should not be performed.
WARNING
1 Avoid bar nose contact.
2 Beware of kick back.
3 Do not attempt to hold saw with one hand.
GREEN RECOMMENDED
Recommended cutting procedure.
4 Hold saw properly with both hands.
Intended use
The chain saw is intended for sawing of trees, tree trunks, branches, wooden beams,
planks, etc. Cuts can be sawed with or across the grain. This product is not suitable
for sawing mineral materials.

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Technical specifications
Model YT4302-09
Voltage: 220-240V~ 50Hz
Power 2400 W
No load speed 13.5 m/s
Guide bar length 405 mm
Guide bar OREGON-160SDEA041
Saw chain OREGON-91PJ057X
Chain pitch 9.53 mm
Chain gauge 1.27 mm
Driving Sprocket 6 Teeth
Net Weight (with guide bar and chain) 5.4 kg (max)
Oil Capacity 210 ml
Sound pressure level LpA 84.92dB(A) K= 3 dB(A)
Sound power level LwA 104.92dB(A) K= 3 dB(A)
Vibration for rear handle 3.284 m/s² K=1.5m/s2
Vibration for front handle 3.838 m/s² K=1.5m/s2
Limites of ambient conditions From 10°C to 40°C
Noise/Vibration Information
Measured sound values determined according to EN 60745-2-13 :2009+A1.
Wear ear protection
Vibration total values (triax vector sum) determined according to EN
60745-2-13 :2009+A1.
The vibration emission level given in this information sheet has been measured in
accordance with a standardised test given in EN 60745-2-13 :2009+A1 and may be
used to compare one tool with another.
It may be used for a preliminary assessment of exposure.
The declared vibration emission level represents the main applications of the tool.
However if the tool is used for different applications, with different accessories or
poorly maintained, the vibration emission may differ. This may significantly increase
the exposure level over the total working period.
An estimation of the level of exposure to vibration should also take into account the
times when the tool is switched off or when it is running but not actually doing the job.
This may significantly reduce the exposure level over the total working period.
Identify additional safety measures to protect the operator from the effects of vibration
such as: maintain the tool and the accessories, keep the hands warm, organisation of
work patterns.

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List of main parts (Fig.2)
Fig.2
1. sprocket cover
2. hand wheel
3. tension adjustment hand wheel
4. front handle
5. brake guard
6. oiltankcap
7. retaining block
8. support plate
9. location pin
10. sprocket
11. oil bottle
12. saw chain
13. bar
14. bar cover
15. power cord
16. rear handle
17. on/off switch
18. cord retention hook
19. lock-off button

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Assembly
Mounting the chain bar
WARNING!
The saw chain has very sharp edges. Use protective gloves for safety.
The saw chain and bar are packed separately in the carton.
1) Place the saw on a firm surface. Fig.3
Fig.3
2) Remove sprocket cover by loose the hand wheel on sprocket cover. Fig. 4
Fig.4
3) Put the chain on the bar, beginning from the top, ensure cutter teeth are facing
direction of chain rotation.Fig.5
Fig.5
Tighten
Loosen

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4) Place the saw chain and guide bar assembly around the sprocket. Check to make
sure that the tensioning pin insert into the hole on the bar and the sprocket cover
insert onto the location pin. (fig.6)
Fig.6
5) Rotate the hand wheel to fix the sprocket cover first, but do not tight it. Fig.7&8
`
Fig.7 Fig.8
6) Rotate the tension adjustment hand wheel to increase the chain tension. (Fig.9)
Following instruction in “adjusting chain tension” section.
Fig.9
7) Tighten the hand wheel to make sure the chain bar with saw chain has been
securely tightened.
WARNING!
Always carry out a test run before starting work and after every tool change! Always
ensure that the tools are in good condition, correctly mounted and able to turn freely.
The trial run should be at last 30 sec.
Adjusting chain tension
WARNING!
The saw chain has very sharp edges. Use protective gloves for safety.
To adjust the chain tension as follows:
a) With the saw still on a firm surface check the chain tension. The tension is correct
when the chain snaps back after being pulled 3mm away from the guide bar with

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light force from the middle finger and thumb. There should be no sag between the
guide bars.
b) Rotate the hand wheel to loosen the sprocket cover first, but do not remove it and
make the tensioning pin on the sprocket cover get out from the hole on the bar.
c) Rotate the tensioning wheel to increase or reduce the chain tension.
d) Once chain tension is correct, please always tighten the hand wheel.
WARNING!
Do not over tension the chain as this will lead to excessive wear and will reduce the
life of bar and chain. Over tensioning also reduce the amount of cuts you should get.
Oil filling
Note: the chain saw is shipped without oil in it, the chain saw must never be used without
oil or with an oil level that is below the indicator.
Warning, always ensure that the chainsaw is switched off and the plug is removed from
the power point before making any adjustments.
1. Remove oil cap. (fig.10)
Fig.10
2. Fill oil tank with chain Lubricating oil.
Fig.11
3. Check the oil level periodically , through the oil level indicator(fig.12)
Fig.12
4. Tighten oil cap firmly for good seal, this will avoid oil seepage from tank.
5. Wipe off excess oil.
Note: it is normal for oil to seep when saw is not in use. Empty oil tank after each use
to prevent seepage.

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Checking the automatic oil function
Check the automatic operation of the chain lubrication by pointing the tip of the switched
–on saw towards a piece of paper laying on the ground, if a patch of oil appears and
becomes larger, then the automatic oil function is working. If there are no traces of oil
even though the oil tank is full. Then the automatic oil function is not working .
If the automatic oil function is not working . remove the chain bar and clean out the oil
ways of the chainsaw and chain bar, on reassemble if the chainsaw is still not working
take it to a autorised if the chainsaw is still not working take it to an autorised service
centre.
KICKBACK
Warning: kickback may occur when the nose or tip of the guide bar touches an object, or
when the wood closes in and pinches the saw chain in the cut. Tip contact in some cases
may cause a lightning fast reverse reaction. Kicking the guide bar up and back towards
the operator, pinching the saw chain along the top of the guide bar may push the guide
bar rapidly back towards the operator, either of these reactions may cause you to lose
control of the saw which could result in serious injury to user.
Kickback safety devices on this saw. (fig.13)
This saw has a low-kickback chain and reduced kickback guide bar , both items reduce
the chance of kickback, kickback can still occur with this saw.
Properly install front hand guard, this item can reduce injures from kickback, do not
remove front hand guard, do not replace front hand guard with substitute.
The following steps will reduce the risk of kickback.
-use both hands to grip saw while saw is running. Use firm grip. Thumbs and
fingers must wrap around saw handles.
-Keep all safety items in place on saw make sure they work properly.
-Do not overreach or cut above shoulder height.
-Keep solid footing and balance at all times.
-Stand slightly to left side of saw. This keeps your body from being in direct line
with chain.
-Do not let guide bar nose touch anything when chain is moving
Fig. 13

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-Never try cutting through two logs at same time, only cut one log at a time.
-Do not bury guide bat nose or try plunge cut(boring into wood using guide bar
nose)
-Watch for shifting of wood or other forces that may pinch chain.
-Use extreme caution when reentering a previous cut.
-Use low-kickback chain and guide bar supplied with this chain saw. Only replace
these parts with chains ad guide bar listed in this manual.
-Never use dull or loose chain, keep chain sharp with proper tension.
-Do not hand sharpen chain on automatic chain sharpening (fast sharp) models.
Avoid jamming
Always cut into the compression wood first until the cut starts to close. Always make the
compression cut beneath if the log or limb is suspended from one end, and on top if it is
supported at both ends, cut from the other side towards the compression cut, make a
habit of using a wedge to prevent the compression cut jamming tight on the chainsaw
blade.
Extension cord support
During use of the chainsaw. The extension cord will continually be pulled as you move
from one area to another.
A cord retention hook has been provided on the housing of the chainsaw to assist in
preventing the electrical connection between the extension cord and chainsaw plug being
forced apart.
Note: the support is for the extension cord, and not the cable from the chainsaw.
1. to fit the extension cord to the support. Make a tight loop in the extension cord,
approximately 300mm from the socket on the extension cord.
2. fit the loop into the rectangle recess in the back portion of the chainsaw.
3. push the loop all the way through the housing by approximately 25 mm.
4. push each side of the loop downwards so each side of the loop fits over the cord
retention hook.
5. to seat the cable firmly. Gently pull one of the two lengths of extension cable on the
right hand side of the chainsaw.
6. after , and only after the cable is correctly seated, plug the chainsaw plug into the
socket of the extension cable.
Before start-up
1. check the tool and cable are in good working order before staring the chain saw.
2. make sure that the chain lubrication is working and check the oil level.
3. check the chain tension and the operation of the chain brake.
Caution：
Pass the extension cable over your shoulder and pay attention that it always stays behind
you while you are working. Never pass the cable over the saw chain, it is likely to be
caught by the chain.

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Start up
1. remove the bar cover
2. release the chain brake by pulling the front hand guard(5). Firmly towards the back of
the electric chain saw until a click is heard, to check the chain brake has been
released, you should be able to move the chain by hand. (fig.14&fig.15)
Fig.14 fig.15
3. connect the cable to the power.
Note: ensure the brake is working efficiency. Check its operation every time you use
the chain saw before commencing work with it.
Warning : the on/off switch ever be depressed before pulling back the front hand
guard.
4. hold the electric chain saw by its grip with both hands.
5. to start the chainsaw , press the lock-off button on the trigger switch.
6. to stop the chain saw , release the trigger switch.
Warning: hold the electric chain saw with both hands until the chain is completely still.
Operating the electric chain saw
Safe chainsaw operation
While cutting , always :
-run the chainsaw motor at full revs, this makes the job safer, as these is less
chance of pull-in or kick-back.
-Position your body to the left of the chainsaw so if it kicks back uncontrollably. It
goes over your right shoulder.
-Keep a firm grip with your left hand on the front handle, with your thumb securely
below the handle. The swivel of your wrist in a kick-back situation will activate the
chain brake.
-Make sure the chain is tensioned correctly.
-Observe the size of wood shavings, if they become dusty your chain could need
sharpening.
Trimming a tree(pruning) (fig16)
Warning : avoid kickback, kickback can result in severe injury or death,
Warning: do not operate chain saw while
-in a tree.
-On a ladder or any other unstable surface
-In any awkward position
You may lose control of saw causing severe injury.
Warning: do not cut limbs higher than your shoulders.

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Trimming a tree is the process of cutting limbs from a living tree, makes sure your footing
is firm keep feet apart. Divide your weight evenly on both feet. Follow directions below to
trim a tree.
1. make first cut 15 centimeters from tree trunk on underside of limb, use top of guide
bar to make this cut. Cut 1/3 through diameter of limb
2. move five to ten centimeters farther out on limb, make second cut from above limb.
Continue cut until you cut limb off.
3. make third cut as close to tree trunk as possible on underside of limb stub. Use top
of guide bar to make this cut. Cut 1/3 through diameter of stub.
4. make fourth cut directly above third cut. Cut down to meet third cut, this will remove
limb stub.
CAUTION: Seek professional help if facing conditions beyond your ability.
Fig.16

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Felling a tree
When bucking and felling operations are being performed by two or more persons at
the same time, the felling operations should be separated from the bucking operation
by a distance of at least twice the height of the tree being felled.
Trees should not be felled in a manner that would endanger any person, strike any
utility line or cause any property damage. If the tree does make contact with any utility
line, the company should be notified immediately.
The chain saw operator should keep on the uphill side of the terrain as the tree is
likely to roll or slide downhill after it is felled.
An escape path should be planned and cleared as necessary before cuts are started.
The escape path should extend back and diagonally to the rear of the expected line of
fall as illustrated in Figure 17.
Before felling is started, consider the natural lean of the tree, the location of larger
branches and the wind direction to judge which way the tree will fall.
Remove dirt, stones, loose bark, nails, staples and wire from the tree.
Fig.17 Description of felling:excape routes

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Notching undercut
Make the notch 1/3 the diameter of the tree, perpendicular to the direction of falls as
illustrated in Figure 18. Make the lower horizontal notching cut first. This will help to
avoid pinching either the saw chain or the guide bar when the second notch is being
made.
Felling back cut
Make the felling back cut at least 50 mm higher than the horizontal notching cut as
illustrated in Figure 18. Keep the felling back cut parallel to the horizontal notching cut.
Make the felling back cut so enough wood is left to act as a hinge. The hinge wood
keeps the tree from twisting and falling in the wrong direction. Do not cut through the
hinge.
As the felling gets close to the hinge, the tree should begin to fall. If there is any
chance that the tree may not fall in desired direction or it may rock back and bind the
saw chain, stop cutting before the felling back cut is complete and use wedges of
wood, plastic or aluminium to open the cut and drop the tree along the desired line of
fall.
When the tree begins to fall remove the chain saw from the cut, stop the motor, put
the chain saw down, then use the retreat path planned. Be alert for overhead limbs
falling and watch your footing.
Fig.18 Description of felling:undercutting