Zhejiang YD-45A User manual

1
GASOLINE CHAIN SAW
YD-45A
OWNER’S MANUAL
Caution
Before using our chain saws,
please read this manual
carefully to understand the
proper use of your unit.
Keep this manual handy.
CE TUV/GS EMC
Zhejiang Yongkang Zhongjian Tools Manufacture Co.,Ltd.
27,Yongdong Road E,Great Wall Industrial Zone,Yongkang,Zhejiang Province,
P.R.China

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SAFETY FIRST
Instructions contained in warnings within this manual marked with a symbol concern
critical points which must be taken into consideration to prevent possible serious
bodily injury, and for this reason you are requested to read all such instructions
carefully and follow them without fail.
NOTES ON TYPES OF WARNINGS IN THE MANUAL
WARNING
This mark indicates instructions which must be followed in order to prevent accidents
which could lead to serious bodily injury or death.
IMPORTANT
This mark indicates instructions which must be followed, or it leads to mechanical
failure, breakdown, or damage.
NOTE
This mark indicates hints of directions useful in the use of the product.
1. PARTS LOCATION………………………………………………… 3
2. WARINIG LABELS ON THE MACHINE………………………… 4
3. SYMBOLS ON THE MACHINE ……………………………………5
4. SAFETY PRECAUTIONS …………………………………………6
5. INSTALLING GUIDE BARAND SAW CHAIN……………………12
6. FUELAND CHAIN OIL……………………………………………14
7. OPERATING ENGINE………………………………………………15
8. SAWING ……………………………………………………………20
9. MAINTENANCE……………………………………………………23
10. MAINTENANCE OF SAW CHAIN AND GUIDE BAR …………26
11. SPECIFICATIONS …………………………………………………28

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1.Front hand guard 10.Fuel tank cap
2.Starter handle 11.Oil tank cap
3.Air cleaner cover 12.Front handle
4.Choke knob 13.Saw chain
5.Throttle trigger lockout 14.Guide bar
6.Rear handle 15.Spiked bumper
7.Throttle trigger 16.Chain catcher
8.Throttle lock button 17.Rear hand guard
9.Stop switch 18.Muffler/clutch cover
17
18
16
15

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Safety Device:
1. 1．Chain brake with front Hand Guard--Guard between the front handle and
the saw chain for protecting the hand from injuries and aiding in control of
the chain saw if the hand slips off the handle. This guard is used to activate
the chain brake which is to stop the saw chain rotation.
2. Muffler--Reduce exhaust noise please stop operating when the silencer is
broken or the silencer bolt is loose.
3. Chain Catcher—A projection designed to reduce the risk of the operator’s
right hand from being hit by a chain which has broken or derailed from the
guide bar during cutting.
4. Rear Hand guard—Support handle located towards the rear of the engine
housing
5. Throttle Lock—A safety lever which must be depressed before the throttle
trigger can be activated in order to prevents the accidental operation of the
throttle trigger.
6. Vibration Damping Device—Reduce the vibration.
7. Spiked Bumper —The spiked bumper is used for your personal safety and
ease of cutting. Spiked bumper will increase your stability while performing
vertical cutting.

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(1) Read owner’s manual before operating this machine.
(2) Wear head, eye and ear protection.
(3) Use the chain saw with two hands.
(4) Warning! Kickback is dangerous.
(5) Warning/Attention.
（6）Wear thick work gloves
(7)Wear safety boots with saw protection against cutting.
IMPORTANT
If warning seals peel off or become soiled and impossible to read,
you should contact the dealer from which you purchased the
product to order new seals and affix the new seal(s) in the
required location(s).

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WARNING
This product should only be used in the original condition.
The warranty only applies to machines that have been
operated in their original condition and as instructed in
the user’s manual.
For safe operation and maintenance, symbols are carved
in relief on the machine. According to these indications,
please be careful not to take a mistake.
(a).The port to refuel the “GASOLINE MIX”
Position: fuel tank cap
(b).The port to refuel the “CHAIN OIL”
Position: oil cap
(c).The indication regarding the switch.
Flipping the engine switch to the “O”(STOP)
direction stops the engine from running.
0Position: rear-left of the unit
(d).The indication regarding the choke.
Pulling out the choke knob, the choke closes.
Position: rear-right of the unit
(e). The indication regarding the chain oil adjuster
nut.
“MIN”direction-the oil flow decrease
“MAX”direction-the oil flow increase.
Position: bottom of the clutch side
(f).The position of H-needle
The position of L-needle
The position of idle adjusting screw (T)
Position: rear-left of the unit

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BEFORE USING THE MACHINE
a. Read this owner’s manual carefully to understand how to operate this unit
properly.
b. You should never use the product when under the influence of alcohol, when
suffering from exhaustion or lack of sleep, when suffering from drowsiness
as a result of having taken cold medicine, or at any other time when a
possibility exists that your judgment might be impaired or that you might not
be able to operate the machine properly and in a safe manner.
c. Avoid running the engine indoors. The exhaust gases contain harmful carbon
monoxide.
d. Never use the product under circumstances like those described below:
1. When the ground is slippery or when other conditions exist which might
make it impossible to maintain a steady posture.
2. 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 area.
3. 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 this product.
e. When using this product for the first time, before beginning actual work,
learn to handle the machine from a skilled worker.

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f. Lack of sleep, tiredness, or physical exhaustion results in lower attention
spans, and this in turn leads to accidents and injury. Limit the amount of time
of using the machine continuously to somewhere around 10 minutes per
session, and take 10-20 minutes of rest between work sessions. Also try to
keep the total amount of work performed in a single day under 2 hours or
less.
g. Be sure to keep this manual handy so that you may refer to it later whenever
any questions arise.
h. Always be sure to include this manual when selling, lending, or otherwise
transferring the ownership of this product.
i. Never allow children or anyone unable to fully understand the directions
given in this manual to use this product.
j. Please go to the nearest hospital at once if you get hurt during cutting
because of forgetting to wear gloves
k. Be aware of prolonged vibrations effects. Due to vibration, long time
operation may cause user’s finger losing sensation or painful.
！WARNING:PERSONAL PROTECTION
WORKING GEAR AND CLOTHING
a. When using the product, you should wear proper
clothing and protective equipment as follows.
(1) Helmet
(2) Protection goggles or face protector
(3) Thick work gloves with saw protection
(4) Non-slip-sole work boots with saw protection
(5) Ear protectors
(6)Protective trousers with saw protection
b. And you should carry with you.
1. Attached tools and files.
2. Properly reserved fuel and chain oil.

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3. Things to notify your working area (Rope,
warning signs)
4. Whistle (for collaboration or emergency)
5. Hatchet or saw (for removal of obstacles)
c. Never use the product when wearing pants with
loose cuffs, when wearing sandals, or when barefoot.
WARNING CONSIDERING HANDLING OF FUEL
a. The engine of this product is designed to run on a fuel mixture that contains
highly flammable gasoline. Never store cans of fuel or refill the fuel tank 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.
b. Smoking while operating the product or refilling its fuel tank is extremely
dangerous. Always be sure to keep lit cigarettes away from the product at all
times.
c. When refilling the tank always turn off the engine first and take a careful
look around to make sure that there are no sparks or open flames anywhere
nearby before refueling.
d. If any fuel spillage occurs during refueling, use a dry rag to wipe up spills
before turning the engine back on again.
e. After refueling, screw the fuel cap back tightly onto the fuel tank and then
carry the product to a spot 3m or more away from where it was refueled
before turning on the engine.
NOTE
If fuel or product is ignited, please put out fire with dry powder fire extinguisher.
BEFORE STARTING ENGINE
Check the working place, the cutting object and cutting direction. It there are any
obstacles, remove it before proceeding with work.
Never start cutting until you have a clear work area, secure footing and a planned
retreat-path from the falling tree.

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Use caution and keep bystanders and animals out of the working area whose diameter
is 2.5 times of the cutting object.
Inspect the machine for worn, loose, or damaged parts. Never operate the machine
that is damaged, improperly adjusted, or is not completely and securely assembled.
Make sure that the saw chain stops moving when the throttle control trigger is
released.
WHEN STARTINGTHE ENGINE
Always hold the machine firmly with both
hands when the engine is running. Use a firm
grip with thumb and fingers encircling the
handles.
Keep all parts of your body away from the
machine when the engine is running.
Before starting the engine, make sure the saw
chain is not in contact with anything.
OPERATION
Keep the handles dry, clean and free of oil or
fuel mixture.
Never touch the muffler, spark plug or other
metallic parts of the engine while the engine is
in operation or immediately after stopping the
engine. Doing so could result in serious burns or
electrical shock.
Use extreme caution when cutting small size
brush and saplings because slender material may
catch the saw chain and be whipped toward you

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or pull you off balance.
When cutting a limb that is under tension, be
alert for spring back so that you will not be
struck when the tension in the wood fibers is
released.
Check the tree for dead branches that could fall
during the felling operation.
Always shut of the engine before setting it
down.
KICKBACK SAFETY PRECAUTIONS FOR CHAIN SAW USERS
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. Top 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 personal injury.
Do not rely exclusively on the safety devices built into your saw. As a chain saw user
you should take several steps to keep cutting jobs free from accident or injury.
1. With a basic understanding of kickback you can reduce or eliminate the element
of surprise. Sudden surprise contributes to accidents.
2. Keep a good grip on the saw with both hands, the right hand on the rear handle,
and the left hand on the front handle, when the engine is running. Use a firm grip
with thumbs and fingers encircling the chain saw handles. A firm grip will help
you reduce kickback and maintain control of the saw.
3. Make certain that the area in which you are cutting is free from obstructions. Do
not let the nose of the guide bar contact a log, branch, or any other obstruction
which could be hit while you are operating the saw.
4. Out at high engine speeds.
5. Do not overreach or cut above shoulder height.
6. Follow manufacturers sharpening and maintenance instructions for saw chain.
7. Only use replacement bars and chains specified by the manufacturer or the
equivalent.

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MAINTENANCE
In order to maintain your product in proper working order,
perform the maintenance and checking operations
described in the manual at regular intervals.
MAINTENANCE INSTRUCTIONS
All chain saw service, other than items listed here in your
user manual maintenance instructions, should be
performed by a professional.
PREVENTATIVE MAINTENANCE.
A good preventive maintenance program of regular
inspection and care will increase life and improve
performance of your chain saw. This maintenance
checklist is a guide for such a Program.
Cleaning, adjustment, and parts replacement may be
required, under certain conditions, at more frequent
intervals than those indicated.
Always be sure to turn off the engine before performing
any maintenance or checking procedures.
WARNING
The metallic parts reach high temperatures immediately
after stopping the engine.
Leave all maintenance other than the items listed in the
Owner’s Manual to your competent servicing dealer.
TRANSPORTATION
Always carry the unit with the engine stopped, the guide
bar covered with the protector to the rare, and muffler
away from your body.
Maintenance
Checklist
EACH
USE
HOURS OF
OPERATIO
N
ITEM
ACTIOPN
√
10
20
Screws/Nuts/Bolts
Inspect/tighten
√
Air Filter
Clean or replace
√
Fuel Filter/Oil Filter
Replace
√
Spark Plug
Clean/Adjust/Replace
√
Spark Arrester Screen
Inspect
√
Fuel Hoses
Inspect
√
Replace as Required
Chain brake
components
Inspect
√
Replace as Required

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STORAGE
WARNING: Stop engine and allow to cool. Secure the unit before storing or
transporting in a vehicle. Store unit and fuel in an area where fuel vapors cannot reach
sparks or open flames from water heaters, electric motors or switches, fumaces, etc.
Store unit with all guards in place. Position the unit so that any sharp object cannot
accidentally cause injury to passersby. Store the unit ort of reach of children.
Improper maintenance and removal or modification of safety components will cause
deviation in the engine’s work. Personal injury and death may follow due to improper
use..
Before storing, drain all fuel from the unit. Start engine and run the engine until it
stops.
Clean the unit before storing. Pay particular attention to the air intake area, keeping it
free of debris. Use a mild detergent and sponge to clean the plastic surfaces.
Do not store the unit or fuel in a closed area where fuel vapors can reach sparks or an
open flame from hot water heaters, electric motors or switched, fumaces. etc.
Store in a dry area out of the reach of children.
NOTE: It is important to prevent gum deposits from forming in essential fuel system
parts such as the carburetor, fuel filter, fuel hose, or fuel tank during storage. Alcohol
blended fuels (called gasohol or using ethanol or methanol) can attract moisture
which leads to fuel mixture separation and formation of acids during storage. Acidic
gas can damage the engine.
A standard saw unit package contains the items as
illustrated. (F1)
(1) Power unit
(2) Guide bar
(3) Saw chain
(4) Plug wrench
(5) Screw driver
(6) Spiked bumper
Open the box and install the guide bar and the saw
chain on the power unit as follows:

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WARNING The saw chain has very sharp edges. Pay attention to
the correct direction of the saw chain.(F3)Use thick
protective gloves for safety.
1.Pull the guard towards the front handle to check
that the chain brake is not on.
2.Loosen the nuts and remove the chain cover.
3.Install the attached spike to the power unit.
4.Gear the chain to the sprocket and, while fitting the
saw chain around the guide bar, mount the guide bar
to the power unit. Adjust the position of chain
tensioner nut on the chain cover to the lower hole of
guide bar. (F2,F4)
(8) Hole
(9) Chain tensioner adjuster
(10) Clutch cover

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FUEL
Mix a regular grade gasoline (leaded or
unleaded, alcohol-free) and a quality-proven
motor oil for air cooled 2 cycle engines.
Recommended mixing ratio:
Condition Gasoline: Oil
Up to 20 hours use 20:1
After 20 hours use 25:1
25:1 Mix Chart
Gasoline liters 1 2 3 4 5
2-cycle oil ml. 40 80 120 160 200
WARNING:
Keep open flames away from the area where
fuel is handled or stored.
Mix and store fuel only in an approved gasoline
container.
NOTE:
Most engine troubles are caused, directly or
indirectly, by the fuel used on the machine. Take
special care not to mix a motor oil for 4 cycle
engines.
CHAIN OIL:
Use motor oil SAE #10W-30 all year round or
SAE #30~#40 in summer and SAE #20 in
winter.
NOTE:
Do not use wasted or regenerated oil that can
cause damage to the oil pump.

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STARTING ENGINE
1.Fill fuel and chain oil tanks respectively, and tighten the
caps securely. (F7)
2.Put the switch to “I”position. (F8)
3.While holding the throttle lever together with the throttle
interlock, push in the side throttle lock button and release
the throttle lever to hold it at the starting position. (F9)
(1) Chain oil
(2) Fuel
(3) Switch
(4) Throttle lock button
(5) Throttle lever
(6) Throttle interlock
(7) Choke knob
4.Pull out the choke knob to the closed position. (F10)
NOTE
When restarting immediately after stopping the engine,
leave the choke knob at the open position.
5.While holding the saw unit securely on the ground, pull
the starter rope firmly. (F11)
WARNING
Do not start the engine while hanging the saw chain with a
hand. The saw chain may touch your body. It’s very
dangerous.
6.When engine has ignited first, push in the choke knob and
pull the starter again to start the engine.
7.Allow the engine to warm up with the throttle lever pulled
slightly.
WARNING
Keep clear of the saw chain as I t will start rotating upon
starting of will start rotating upon starting of engine.

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CHECKING OIL SUPPLY
After starting the engine, run the chain at
medium speed and see if chain oil is scattered
off as shown in the figure. (F12)
(1) Chain oil
The chain oil flow can be changed by inserting a
screwdriver in the hole on bottom of the clutch
side. Adjust according to your work conditions.
Causion！Wear your protective glasses to prevent your eyes hurt by the splashed
lubricating oil and flying off sawdust.
(F13)
(1) Adjuster
NOTE
The oil tank should become nearly empty by the
time fuel is used up. Be sure to refill the oil tank
every time when refueling the unit.
ADJUSTING CARBURETOR (F14)
The carburetor on your unit has been factory
adjusted, but may require fine turning due to
change in operating conditions.
Before adjusting the carburetor, make sure that
provided are clean air/fuel filters and fresh,
properly mixed fuel.
When adjusting, take the following steps:
NOTE
Be sure to adjust the carburetor with the bar
chain attached
1.Stop engine and screw in both H and L needles
until they stop. Never force. The set them back
the initial number of turns as shown below.
H needle: 1⅜

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L needle: 1¼
2.Start engine and allow it to warm up at
half-throttle.
3.Turn L needle slowly clockwise to find a
position where idling speed is maximum, then set
the needle back a quarter (1/4) turn
counterclockwise.
4.Turn idle adjusting screw (T) counterclockwise
so that saw chain does not turn. If idling speed is
too slow, turn the screw clockwise.
5.Make a test cut and adjust the H needle for best
cutting power, not for maximum speed.
(1) L needle
(2) H needle
(3) Idle adjusting screw
！CAUTION
Be care of lubrication oil and saw dust emission during operating the chain saw.

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CHAIN BRAKE
This machine is equipped with an automatic brake
to stop saw chain rotation upon occurrence of
kickback while in saw cutting operation. The brake
is automatically operated by inertial force which
acts on the weight fitted inside the Front hand
guard.
This brake can also be operated manually with the
Front hand guard turned down to the guide bar.
To release brake, pull up the Front hand guard
toward the front handle till “click”sound is heard.
[Caution]
Be sure to confirm brake operation on the daily
inspection.
How to confirm:
(1) Turn off the engine.
(2) Holding the chain saw horizontally, release
your hand from the front handle, hit the tip of the
guide bar to a stump or a piece of wood, and
confirm brake operation. Operating level varies by
bar size. (F18)
In case the brake is not effective, ask our dealer
inspection and repairing. The engine, if being kept
rotated at high speed with the brake engaged, heats
the clutch, causing a trouble. When the brake is
operated while in operation, immediately release
your fingers from the throttle lever and keep the
engine idling.
STOPPING ENGINE
1.Release the throttle lever to allow the engine
idling for a few minutes.

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Put the switch to the “O”(STOP) position. (F19)
(1) Switch
WARNING
Before proceeding to your job, read “For Safe Operation”section it is recommended
to first practice sawing easy logs. This also helps you get accustomed to your unit.
Always follow the safety regulations. The chain saw must only be used for cutting
wood. It is forbidden to cut other types of material. Vibrations and kickback vary with
different materials and the requirements of the safety regulations would not be
respected. Do not use the chain saw as a lever for lifting, moving or splitting objects.
Do not lock it over fixed stands. It is forbidden to hitch tools or applications to the
P.t.o. that are not specified by the manufacturer.
It is not necessary to force the saw into the cut. Apply only light pressure while
running the engine at full throttle.
When the saw chain is caught in the cut, do not attempt to pull it out by force, but use
a wedge or a lever to open the way.
GUARD AGAINST KICKBACK (F21)
This saw is equipped with a chain brake that will stop the chain in the event of
kickback if operating properly. You must check the chain brake operation before each
usage by running the saw at full the throttle for 1-2seconds and pushing the front hand
guard forward.
The chain should stop immediately with the engine at full speed, if the chain is slow
to stop or does not stop, replace the brake band and clutch drum before use.
It is extremely important that the chain brake be checked for proper operation before
each use and that the chain be sharp in order to maintain the kickback safety level