Shindaiwa 451S User Manual
1Top cover
English
(Original instructions)
Français
Deutsch
Italiano
SHINDAIWA OWNER'S/OPERATOR'S
MANUAL
CHAIN SAW
WARNING
Read the instructions carefully and follow the rules for safe
operation.
Failure to do so could result in serious injury.
Introduction
2Introduction
This chain saw is designed for cutting wood or wood products.
Do not cut solid metal, sheet metal, plastic or any non-wood materials.
It is important for you to understand all safety precautions correctly before using your chain saw.
Misuse of the chain saw can cause serious bodily injury.
Never let children operate the saw.
This manual shows rules of safe operation, proper use, servicing, and maintenance of your shindaiwa chain saw.
Follow these instructions in order to maintain a good operating condition and a long service life.
For future reference, you should keep this operator's manual.
If this operator's manual has become illegible through impairment or is lost, please purchase a new one from your shindaiwa
dealer.
When renting or lending this machine to a person who will operate it, always include this operator's manual, which provides
explanation and instructions.
When transferring a product, please deliver it attaching the operator's manual.
Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are
subject to change without notice.
Illustrations may include optional equipment and accessories, and may not include all standard equipment.
The unit is delivered with guide bar and saw chain separated.
Install guide bar and chain.
If there is any clause in this manual that is hard to be understood, please contact your shindaiwa dealer.
Manufacturer
YAMABIKO CORPORATION
7-2 SUEHIROCHO 1-CHOME, OHME, TOKYO 198-8760, JAPAN
Authorized Representative in Europe
Atlantic Bridge Limited
Atlantic House, PO Box 4800, Earley, Reading RG5 4GB, United Kingdom
2
Contents
Decals and symbols............................................................................................................ 4
Rules for safe operation...................................................................................................... 5
1. General precautions .................................................................................................. 5
2. Kickback safety precautions ...................................................................................... 7
3. Other safety precautions............................................................................................ 8
Description........................................................................................................................ 10
Assembly .......................................................................................................................... 11
Mounting guide bar and chain ..................................................................................... 11
Operation .......................................................................................................................... 13
Fuel and lubricant ........................................................................................................ 13
Chain lubricant............................................................................................................. 13
Cap indication.............................................................................................................. 13
Starting the cold engine ............................................................................................... 14
Starting the warm engine............................................................................................. 15
Running ....................................................................................................................... 15
Stopping the engine..................................................................................................... 16
Checking chain tension................................................................................................ 16
Chain lubrication test ................................................................................................... 16
Pre cutting test............................................................................................................. 16
Correct use of chain brake................................................................................................ 17
Chain brake ................................................................................................................. 17
Checking the brake function of the brake .................................................................... 18
Release the chain brake .............................................................................................. 18
Non-manual chain brake.............................................................................................. 18
Cutting instruction .............................................................................................................19
General........................................................................................................................19
Felling a tree ................................................................................................................ 20
Limbing ........................................................................................................................ 21
Bucking........................................................................................................................21
Tension and compression in timber............................................................................. 22
Service maintenance guide .............................................................................................. 23
Troubleshooting ................................................................................................................ 24
Saw chain maintenance.................................................................................................... 25
Service.............................................................................................................................. 27
Air filter ........................................................................................................................ 27
Check fuel system ....................................................................................................... 27
Fuel filter...................................................................................................................... 27
Oil filter ........................................................................................................................ 27
Spark plug ................................................................................................................... 27
Guide bar..................................................................................................................... 28
Sprocket / Clutch drum ................................................................................................ 28
Carburettor .................................................................................................................. 28
Automatic oiler ............................................................................................................. 28
Cylinder fins (Cooling system)..................................................................................... 29
Silencer........................................................................................................................29
Replacement guide bar and chain............................................................................... 29
Storage ............................................................................................................................. 30
Long term storage (Over 30 days)............................................................................... 30
Disposal procedure ........................................................................................................... 31
Specifications.................................................................................................................... 32
Declaration of conformity .................................................................................................. 33
3
Decals and symbols
DANGER WARNING CAUTION
This symbol accompanied by the
word "DANGER" calls attentions to
an act or a condition which will
lead to serious personal injury or
death of operators and bystanders.
Circle and slash symbol
means whatever is
shown is prohibited.
Symbol form / shape Symbol description / application Symbol form / shape Symbol description / application
Carefully read the operator's manual Chain oil fill
This symbol accompanied by the
word "WARNING" calls attentions
to an act or a condition which can
lead to serious personal injury or
death of operators and bystanders.
NOTE
This enclosed message provide tips
for use, care and maintenance of the
unit.
"CAUTION" indicates a potentially
hazardous situation which, if not
avoided, may result in minor or
moderate injury.
Wear eyes, ears and head protection Chain oiler adjustment
Warning!
Kickback may occur!
Emergency stop Carburettor adjustment
Chain brake operation Guaranteed sound power level
Oil and petrol mixture
Locate this safety decal on your unit.
The complete unit illustration found in the "Description"
section will help you locate them.
Purge bulb (Primer)
- Idle speed
Make sure the decal is legible and that you understand and
follow the instructions on it.
If a decal cannot be read, a new one can be ordered from
your shindaiwa dealer.
4
Rules for safe operation
1. General precautions
Operator's manual
Read the operator's manual for your chain saw carefully.
Be thoroughly familiar with the chain saw's controls and how to use the chain saw properly.
Failure to follow instructions could lead to personal injury.
If you have any questions or problems, please contact your shindaiwa dealer.
Physical condition
Do not operate a chain saw when you are fatigued or under the influence of alcohol or
drugs.
You should be in good physical and mental health in order to handle your chain saw safely.
Errors in judgement or execution can be serious or fatal.
If you have any physical condition which strenuous work could worsen, check with your
physician before using a chain saw.
Do not operate when ill or fatigued, or under the influence of any substance or medication
which could affect your vision, dexterity or judgement.
Personal equipment
CAUTION
Stuffing ears with cotton is not recommended.
Always wear approved goggles to protect your eyes.
Wood chips, dust, snapping branches and other debris can be thrown by the cutting chain
into the operator's facial area.
Goggles may also offer limited protection in the event of the cutting chain hitting the
operator in the eye area.
If conditions warrant that a ventilated face shield be worn, goggles must be worn
underneath it.
shindaiwa advises wearing hearing protection at all times.
If not followed, hearing loss can occur.
You should reduce the risk of hearing damage by wearing either "headset" type protectors
or ear plugs which are approved by an authorized organization.
All persons who make part of their living using chain saws should be tested periodically
for hearing deterioration.
Always wear a cap or hat when working with a chain saw.
A safety hard hat is highly recommended when felling or working under trees, or when
objects can fall on you.
Wear heavy duty, non-slip gloves for improved grip, and also for protection against cold
and vibration.
Safety tip shoes or boots with non-slip sole should be worn.
Never wear loose clothing, unbuttoned jackets, flared sleeves and cuffs, scarves,
tie-strings, neckties, cords, chains, jewellery, etc. which could snag the saw chain or
underbrush.
Clothing should be of sturdy, protective material.
It should be snug-fitting to resist snagging, but roomy enough for freedom of movement.
Trouser legs should not be flared or cuffed, and should be either tucked into the boot tops
or trimmed short.
Safety vests, leg chaps and logger's pants of ballistic material are available.
It is the operator's responsibility to wear such additional protection if conditions warrant it.
Never operate a chain saw when you are alone.
Arrange to have someone remain within calling distance in case you need help.
5
Fuel
DANGER
Petrol and fuel are extremely flammable.
If spilled or ignited by ignition source, it can cause fire and serious injury or
property damage.
Extreme caution is required when handling petrol or fuel.
After refuelling, tighten fuel cap firmly and check for leakage.
In case of fuel leakage, repair before starting operation since there is a danger of
fire.
1. Oil tank cap
2. Fuel tank cap
A: Tightening direction
Use an appropriate type of fuel container.
Bring an extinguisher or shovel in case of fire.
Despite the precautions which can be taken, operating a chain saw, or just working in the
forest, presents dangers.
Do not smoke or bring flame or sparks near to fuel supplies.
The fuel tank may be under pressure.
Always loosen the fuel cap and wait for pressure to be equalized before removing the cap.
Fill the fuel tank outdoors over bare ground and install the fuel cap securely.
Do not pour fuel indoors.
Wipe any spilled fuel off the unit.
Never refuel while the engine is still hot, or fuel a running engine.
Do not store the unit with fuel in its tank, because a fuel leak could start a fire.
Starting engine
Move the chain saw at least 3 m from the fuelling point before starting the engine.
Do not allow other persons to be near the chain saw when you are starting or cutting with
the chain saw.
Keep bystanders and animals out of the work area.
Do not let anyone hold wood for you to cut.
Do not start cutting until you have a clear work area, secure footing and a planned retreat
path from the falling tree.
Before you start the engine, make sure that the saw chain is not contacting anything.
Keep the handles dry, clean, and free of oil or fuel mixture.
Operate the chain saw only in well-ventilated areas.
Exhaust gas, oil mist (from chain saw lubrication) or saw dust is harmful to health.
Transportation
1. Guide bar cover
When transporting your chain saw, use the appropriate guide bar cover.
Carry the chain saw with the engine stopped, the guide bar and saw chain to the rear, and
the silencer away from your body.
6
2. Kickback safety precautions
DANGER
Kickback safety precaution for chain saw users: 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.
In some cases, tip contact may cause a lightning-fast reverse reaction, kicking the guide
bar up and back toward the operator (this is called a rotational kickback).
Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back
toward the operator (this is called a linear kickback).
Either or these reactions may cause you to lose control of the saw and come in contact
with the moving chain, which could result in serious personal injury.
As a chain saw user, you should take several steps to keep your cutting jobs free from
accident or injury.
With a basic understanding of kickback, you can reduce or eliminate the element of
surprise.
Sudden surprise contributes to accidents.
Understand that rotational kickback is preventable by keeping an unshielded bar nose from
touching an object or the ground.
Do not operate a chain saw with one hand!
Serious injury to the operator, helpers or bystanders may result from one-handed
operation.
For proper control, always use two hands when operating a chain saw, one of which
operates the trigger.
Otherwise, this can result in the chain saw "skating" or skidding, which can result in
personal injury due to loss of control.
Keep a good firm grip on the saw which both hands, with 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.
Two hands must be used to control the saw at all times.
Do not overreach or cut above chest height.
Make sure that the area in which you are cutting is free from obstructions.
Do not let the bar nose contact a log, branch, or any other obstruction which could be hit
while you are operating the saw.
Cutting at high engine speeds may reduce the likelihood of kickback.
But cutting at part-throttle or low engine speeds may be preferable to control the chain saw
in tight situations and may also reduce the likelihood of kickback.
Follow manufacturer's sharpening and maintenance instructions for the saw chain.
Use only replacement guide bars and chains specified by the manufacturer, or the
acceptable equivalents of these guide bars and chains.
7
3. Other safety precautions
Vibration and cold
It is believed that a condition called Raynaud's Phenomenon, which affects the fingers of
certain individuals, may be brought about by exposure to cold and vibration.
Accordingly, your shindaiwa chain saw has shock mounts designed to reduce the intensity of
vibration received through the handles.
Exposure to cold and vibration may cause tingling and burning followed by loss of colour and
numbness in the fingers.
We strongly recommend you take the following precautions because the minimum exposure
which might trigger the ailment is unknown.
Keep your body warm, especially the head and neck, feet and ankles, and hands and
wrists.
Maintain good blood circulation by performing vigorous arm exercises during frequent
work breaks and also by not smoking.
Limit the number of hours of chain saw operation.
Try to fill a part of each work day with jobs other than chain sawing.
If you experience discomfort, redness and swelling of the fingers, followed by whitening
and loss of feeling, consult your physician before further exposing yourself to cold and
vibration.
Repetitive stress injuries
It is believed that over-using the muscles and tendons of the fingers, hands, arms and
shoulders may cause soreness, swelling, numbness, weakness and extreme pain to the
areas just mentioned.
To reduce the risk of repetitive stress injury, do the following:
Avoid using your wrist in a bent, extended or twisted position.
Instead, try to maintain a straight wrist position.
Also, when grasping, use your whole hand, not just the thumb and index finger.
Take periodic breaks to minimize repetition and rest your hands.
Reduce the speed and force in which you do the repetitive movement.
Do exercises to strengthen the hand and arm muscles.
See a doctor if you feel tingling, numbness or pain in the fingers, hands, wrists or arms.
Relative to EU directive "Vibration"
EU Directive "Vibration" (2002/44/EC) was designed to protect people from safety and health
risks arising from mechanical vibration of a machine by enforcing employers to limit a
standardized 8 hour daily vibration exposure level, A(8).
Any person or organization that employs a person to operate a machine has to take the A(8)
value into account when letting the person use it.
Mechanical vibration values (equivalent vibration value) of this machine, which shall be used
as a guide to simplify the calculation of A(8) value, are as follows:
MODEL Type
Front / Left handle (m/s
Rear / Right handle (m/s
2
)1.8
2
)1.9
8
Machine conditions
WARNING
Do not modify a chain saw in any way.
Only attachments and parts supplied by shindaiwa or expressly approved by
shindaiwa for use with the specific shindaiwa chain saw models are authorized.
Although certain unauthorized attachments are useable with the shindaiwa
powerhead, their use may, in fact, be extremely dangerous.
Do not operate a chain saw that is damaged, improperly adjusted, or not completely and
securely assembled.
Do not operate the chain saw with a loose or defective silencer.
Be sure that the saw chain stops moving when the throttle control trigger is released.
Cutting
CAUTION
Do not touch hot surfaces of cylinder cover and silencer after you used the chain saw.
Do not operate a chain saw in a tree unless you have been specifically trained to do so.
Keep all parts of your body away from the saw chain when the engine is running.
Use extreme caution when cutting small-size brush and saplings because slender
material may catch the saw chain and be whipped toward you or pull you off balance.
Stay on the uphill side when bucking or limbing logs which might roll when cut.
When cutting a limb that is under tension, be alert for spring-back so that you will not be
struck by the limb or chain saw when the tension in the wood fibres is released.
Cutting while on a ladder is extremely dangerous because the ladder can slip and your
control of the chain saw is limited.
Working aloft should be left to professionals.
Keep both feet on the ground.
Do not work from off-the-ground positions.
Stop the engine before setting the chain saw down.
Wood practices
Operating a chain saw safely requires a chain saw in proper working order, sound
judgement, and knowledge of the methods which should be applied in each cutting
situation.
Do not let any person use your saw unless he has read this operator's manual and fully
understands its instructions.
Use your saw only to cut wood or wood products.
Do not cut solid metal, sheet metal, plastics or any non-wood materials.
Services
All chain saw service operations, other than items listed in the operator's manual
maintenance instructions, should be performed by competent service personnel.
(For example, if an improper tool is used to hold the flywheel in order to remove the clutch,
structural damage to the flywheel could occur and subsequently could cause the flywheel
to burst.)
9
Description
1. Silencer - The silencer controls the exhaust noise and
prevents hot, glowing particles of carbon from leaving the
silencer.
2. 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.
3. Rear handle (for the right hand) - Support handle
located towards the rear of the engine housing.
4. Rear hand guard - Extension on the lower part of the
rear handle for protecting the hand from the chain if it
breaks or degrooves.
5. Clutch cover - Protective cover to the guide bar, saw
chain, clutch and sprocket when the chain saw is in use.
6. Chain tension adjuster - Device to adjust chain tension.
7. 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.
8. Spiked bumper - Device, fitted in front of the guide bar
mounting point, acting as a pivot when in contact with a
tree or log.
9. Guide bar - The part that supports and guides the saw
chain.
10. Chain - Chain, serving as a cutting tool.
11. Oil tank cap - For closing the oil tank.
12. Starter handle - The grip of the starter, for starting the
engine.
13. Fuel tank cap - For closing the fuel tank.
14. Ignition switch - Device for connecting and
disconnecting the ignition system and thus allowing the
engine to be stopped.
15. Throttle trigger - Device activated by the operator's
finger, for controlling the engine speed.
16. Throttle trigger lockout - A safety lever which must be
depressed before the throttle trigger can be activated in
order to prevent the accidental operation of the throttle
trigger.
17. Purge bulb (primer pump) - When starting engine, push
primer pump 3 or 4 times.
18. Choke control knob - Device for enriching the fuel / air
mixture in the carburettor to aid cold starting.
19. Cleaner cover latch - Device for installing the air cleaner
cover.
20. Air cleaner cover - Covers air filter.
21. Front handle (for the left hand) - Support handle
located at the front of the engine housing.
22. Cylinder cover - The cooling air flow grill.
It cover the cylinder, spark plug and silencer.
23. Safety decal - Part number X505-010150
24. Operator's manual - Included with unit.
Read before operation and keep for future reference to
learn proper, safe operating techniques.
25. Tools - 13 x 19 mm T-wrench (combination screwdriver
/ spark plug socket).
26. Guide bar cover - Device for covering the guide bar and
saw chain during transport and other times when the
chain saw is not in use.
10
Assembly
Mounting guide bar and chain
WARNING
For your own safety, always stop the engine before performing any of the following
operations.
CAUTION
1. All adjustments should be made cold.
2. Always wear gloves when working on chain.
3. Do not operate with a loose chain.
NOTE
Move the chain brake lever (Front hand guard, Brake connector) fully rearward to remove or
install the clutch cover to the chain saw.
1. Release chain brake
2. Two nuts
3. Clutch cover
Install guide bar and chain as follows.
Loosen two nuts and remove clutch cover.
Mount the bar and slide toward clutch to make saw chain installation easier.
4. Guide bar
5. Clutch
6. Bar hole
7. Tension adjuster
8. Brake connector
9. Direction to tension the chain
10. Front hand guard (Brake lever)
Install saw chain as shown.
(Ensure cutters are pointing in the right direction)
Release the chain brake, and install the clutch cover over the guide bar studs.
Tighten two nuts finger tight.
Ensure that chain tension adjuster fits into bar hole.
Align the brake connector of the clutch cover to the groove on the side of the front hand
guard.
11
Hold the bar nose up and turn the adjuster clockwise until the chain fits snugly against
the underside of the bar.
A: Proper tension
B: Improper tension
Tighten both nuts with the bar nose held up.
Pull the chain around the bar by hand.
Loosen the adjustment if you feel tight spots.
12
Operation
Fuel and lubricant
CAUTION
Whenever opening up the fuel tank, always loosen the cap very slowly and wait for
the tank pressure to be equalized before removing the cap.
Fuel is a mixture of regular grade petrol and an air-cooled 2-stroke engine oil of reputable
brand name.
Minimum 89 Octane unleaded petrol is recommended.
Do not use fuel containing methyl alcohol or more than 10 % of ethyl alcohol.
Recommended mixture ratio; 50 : 1 (2%) for ISO-L-EGD Standard (ISO/CD13738),
JASO FC, FD grade and shindaiwa 50 : 1 oil.
- Do not mix directly in engine fuel tank.
- Avoid spilling petrol or oil.
Spilled fuel should always be wiped up.
- Handle petrol with care, it is highly inflammable.
- Always store fuel in approved container.
Chain lubricant
Proper lubrication of the chain while in operation minimizes friction between the chain,
the guide bar and sprocket and also clutch components such as needle bearing and
clutch assembly.
Use shindaiwa genuine chain oil or shindaiwa recommended chain oil specially
formulated for bars and chains for proper lubrication.
These oils contain tackifiers, anti-aging and anti-oxidizing agents.
Consult your shindaiwa dealer for the proper chain oil.
Never use waste or reclaimed oil to avoid various malfunctions on oil system, clutch
system, chain and guide bar.
Lubrication problems caused by the use of improper oil will void the warranty.
Especially, vegetable based chain oil quickly turns to resin and adheres to oil pump,
chain, guide bar, clutch needle bearing and clutch assembly.
It causes malfunctions and shorten product life.
Flush chain oil system with mineral or chemical based chain oil after use, if it is required to
use vegetable oil due to local / municipal rule or any other reason.
For a short time emergency operation, fresh SAE 10W-30 motor oil can be used.
Cap indication
Fuel and oil tanks are indicated by the following illustrations.
Fuel tank cap
(Red)
Chain oil tank cap
(Black)
13
Starting the cold engine
WARNING
After choke control knob is pulled and then knob is returned to original position,
throttle remains a little open (latch condition).
If engine is started in this latch condition, chain starts to turn.
Do not start engine before chain brake is activated.
CAUTION
1. After starting the engine, immediately squeeze and release throttle trigger for
disengaging throttle latch and returning engine to idle, and pull front hand guard
towards the operator immediately. (Chain brake RELEASED position)
2. Do not increase engine speed while chain brake is engaged.
3. Use the chain brake only in starting the engine or in emergencies.
4. Never use throttle latch for cutting.
Use it only when starting the engine.
NOTE
Do not pull starter rope out to the maximum position.
Do not allow starter handle to snap back against the casing.
A: Starter handle
1. Chain brake ACTIVATED position
2. Choke control knob (Close)
3. Purge bulb (Primer pump)
4. Choke control knob (Open)
Fill the fuel tank with fuel mixture.
It is not permitted to fill fuel above the shoulder level of fuel tank.
Fill the chain oil tank with lubricant.
Press hand guard forward.
(Chain brake ACTIVATED position)
Pull choke control knob all the way out.
Push primer pump until fuel is visible in primer pump.
Securely hold the chain saw.
Make sure guide bar and saw chain are not touching anything when starting the saw.
Pull starter handle several times until first firing sound is heard.
Push choke control knob all the way in.
Pull starter handle again.
14
Starting the warm engine
1. Chain brake ACTIVATED position
Confirm there is fuel and chain oil in the tanks.
Press hand guard forward.
(Chain brake ACTIVATED position)
Securely hold the chain saw.
Pull starter handle.
Choke may be used if necessary, but after first firing sound pull throttle trigger a little to
release throttle latch and choke.
After choke control knob is pulled and then knob is returned to original position, throttle
remains a little open (latch condition).
Running
1. Chain brake RELEASED position
2. Throttle trigger lockout
3. Throttle trigger
After engine starts, allow it to idle for a few minutes.
Pull front hand guard towards the operator immediately.
(Chain brake RELEASED position)
Squeeze throttle trigger gradually to increase engine revolution.
The chain starts moving when the engine reaches 3800 r/min approximately.
Ensure proper acceleration and lubrication of saw chain and guide bar.
Do not run the engine at high speed unnecessarily.
Be sure that saw chain stops moving when throttle trigger is released.
15
Stopping the engine
NOTE
If engine does not stop, pull choke control knob all the way out to stop engine.
Return the unit to your authorized shindaiwa dealer to check and repair ignition switch
before starting the engine again.
1. Throttle trigger
2. Ignition switch
Release throttle trigger and allow engine to idle.
Push the ignition switch until the engine is stopped.
Checking chain tension
WARNING
Make sure that the engine is shut off when checking chain tension.
NOTE
Always loosen clutch cover nuts before turning the chain tension adjuster, otherwise the
clutch cover and tensioner will be damaged.
Chain tension should be checked frequently during work and corrected if necessary.
Tension the chain as tight as possible, but so it can still be pulled easily along the bar by
hand.
Chain lubrication test
Hold the chain just above a dry surface and open the throttle to half speed for 30
seconds.
A thin line of "thrown" oil should be seen on the dry surface.
Pre cutting test
Familiarize yourself with your chain saw before you start actual cutting.
For this purpose it may be wise to practice by cutting some small logs or limbs several
times.
Do not allow either people or animals into the work area.
Multiple operators - Keep a safe distance between two or more operators when working
together simultaneously.
16
Correct use of chain brake
DANGER
Kickback motion is very hazardous.
If the tip of the bar touches wood or the like, the guide bar kicks back in an instant.
The chain brake reduces the possibility of injury due to kickback.
Always check that chain brake works properly before use.
NOTE
For practice, while cutting a small tree, push the front guard forward to engage the
brake.
At all times, confirm whether the brake works properly before each task.
If the chain brake is clogged with wood chips, function of the brake deteriorates a little.
Always keep the device clean.
Do not increase engine revolutions while the chain brake is engaged.
Chain brake is used in emergencies.
Do not use it unless absolutely necessary.
When using throttle latch at starting, keep the chain brake in position.
And after starting the engine, release the brake immediately.
Never test the brake in an area where petrol fumes are present.
Chain brake
The chain brake's function is to stop chain rotation after a kickback.
It neither prevents nor reduces kickback.
Do not depend on the chain brake for protection against kickback.
Even with a chain brake, depend on your own good sense and proper cutting methods just as
though there were no chain brake.
Even with normal use and proper maintenance, the response time of the brake may lengthen.
The following may interfere with the brake's ability to protect the operator:
Saw wrongly held too close to operator's body.
Kickback time may be too fast even for a perfectly maintained brake to work in time.
The operator's hand may not be in position to contact the hand guard.
Brake will not be tripped.
Lack of proper maintenance lengthens the brake's stopping time, making it less effective.
Dirt, grease, oil, pitch, etc. getting into the working parts of the mechanism may lengthen
the stopping time.
Wear and fatigue of the activating brake spring, and wear of the brake / clutch drum and
pivot points may lengthen the brake's stopping time.
A damaged hand guard and lever may render the brake inoperative.
17
Checking the brake function of the brake
1. Place the chain saw on the ground.
2. Hold the handle with both hands and accelerate the engine to high speed by using the
throttle trigger.
3. Operate the chain brake by turning your left wrist against the front hand guard whilst
gripping the front handle.
4. The chain stop immediately.
5. Release the throttle trigger.
If the chain does not stop immediately, take the saw to your shindaiwa dealer to repair.
Release the chain brake
When front hand guard is fully pulled towards the operator, chain brake is released.
Non-manual chain brake
IMPORTANT
When checking the operation of the non-manual chain brake, use a soft surface substance
like wood to provide the impact so the saw chain is not damaged.
1). End of the guide bar may be placed at the height about 50 cm.
2). Rear handle should be gripped lightly with the right handle.
The non-manual chain brake stops the operation of the saw chain in such a manner that the
kickback action produced at the end of the guide bar non-manually actuates the chain brake.
To make sure that the non-manual chain brake operates properly, proceed as follows:
1. Stop the engine of the chain saw.
2. Operate the front and rear handles with hands (grip them lightly), so that the guide bar
may be placed at the height of about 50 cm as shown in Fig.
3. Softly detach the left hand from the front handle, and touch the end of the guide bar
against the wood or the like placed below so that the machine receives an impact.
(* at this time the rear handle should be gripped lightly with right hand)
4. The impact is transferred to the brake lever, which actuates the chain brake.
18
Cutting instruction
DANGER
Do not let the nose or tip of the guide bar touch anything while engine is running to
avoid kickback.
General
In all circumstances the operation of the chain saw is a one-man job.
It is difficult at times to take care of your own safety, so don't assume the responsibility for a
helper as well.
After you have learned the basic techniques of using the saw, your best aid will be your own
good common sense.
The accepted way to hold the saw is to stand to the left of the saw with your left hand on the
front handle so you can operate the throttle trigger with your right index finger.
Before attempting to fell a tree, cut some small logs or limbs.
Be thoroughly familiar with the controls and the responses of the saw.
Start the engine, see that is running properly.
Squeeze the trigger to open the throttle wide open, then start the cut.
It is not necessary to press down hard to make the saw cut.
If the chain is properly sharpened, the cutting should be relatively effortless.
Pushing the saw too hard will slow the engine and cutting will actually be more difficult.
Some material may adversely affect the housing of your chain saw.
(Example: palm tree acid, fertilizer etc.)
To avoid housing deterioration carefully remove all packed saw dust around clutch and guide
bar area and wash with water.
19
Felling a tree
A falling tree can seriously damage anything it may hit - a car, a house, a fence, a power-line
or another tree.
There are ways to make a tree fall where you want it, so first decide where that is!
Before cutting, clear the area around the tree.
You will need good footing while working and you should be able to work the saw without
hitting any obstacles.
Next select a path of retreat.
When the tree begins to fall you should retreat away from the direction of fall at a 45-degree
angle and at least 3 m from the trunk to avoid the trunk kicking back over the stump.
Begin the cut on the side to which the tree is to fall.
o
Notch: 1/3 of diameter and 30
Back cut: 2.5 to 5 cm higher
Uncut hinge wood: 1/10 of diameter
Cut a notch approximately 1/3 of the way into the tree.
The position of this notch is important since the tree will try to fall "into" the notch.
The felling cut is made on the side opposite the notch.
Make the felling cut by placing spiked bumper 2.5 cm to 5 cm above the bottom of the notch
and stop cutting at approximately 1/10 of diameter to the inner edge of the notch in order to
leave the uncut portion of the wood as a hinge.
1. Notch cuts
2. Back cut
3. Wedges (when room)
4. Fall
A: Leave 1/10 of diameter hinge
Do not try to cut through to the notch with the felling cut.
The remaining wood between the notch cut and felling cut will act as a hinge when the tree
falls, guiding it in the desired direction.
When the tree starts to fall, stop the engine, place the saw on the ground and make your retreat
quickly.
to 45o angle
Fell big tree.
1. Notching cuts
2. Draw-across method
3. Back cut
4. Draw-across method
5. Felling cuts
A: Wedges
To fell big trees with a diameter exceeding twice the bar length, start the notching cuts from
one side and draw the saw through to the other side of the notch.
Start the back cut on one side of the tree with the spiked bumper engaged, pivoting the saw
through to form the desired hinge on that side.
Then remove the saw for the second cut.
Insert the saw in the first cut very carefully so as not to cause kickback.
The final cut is made by drawing the saw forward in the cut to reach the hinge.
20
Limbing
CAUTION
Don't saw above chest height.
Limbing a fallen tree is much the same as bucking.
Never remove a limb from a tree while it is supporting your weight.
Be careful of the tip touching other limbs.
Always use both hands.
Don't cut with the saw overhead or the bar in a vertical position.
If the saw should kickback, you may not have good enough control to prevent possible injury.
Know how limb is stressed
1. Leave supporting limbs till last.
2. Slide support logs under trunk.
Bucking
CAUTION
Stay on the uphill side of logs.
Bucking is the sawing of a log or fallen tree into smaller pieces.
There are a few basic rules which apply to all bucking operations.
Keep both hands on the handles at all times.
Support logs if possible.
When cutting on a slope or hillside, always stand uphill.
No standing on log.
21
Tension and compression in timber
WARNING
Never use throttle latch for cutting jobs.
CAUTION
If you have misjudged the effects of tension and compression, and cut from the wrong
side, the timber will pinch the guide bar and chain, trapping it.
Racing the engine with the chain jammed will burn out your clutch.
If the chain should become jammed and the saw can not be removed from the cut do
not force it out.
Stop the saw, force a wedge into the cut to open it up.
Never force the saw when it is jammed.
Do not force the saw into the cut.
A dull chain is unsafe and will cause excessive wear to the cutting attachments.
A good way to tell when the chain is dull is when fine saw dust comes out instead of
chips.
1. Hinge
2. Opened
3. Closed
A length of timber lying on the ground will be subject to tension and compression, depending
at which points the major support is.
When timber is supported at its ends the compression side is at the top and the tension side
is at the bottom.
To cut between these support points, make the first cut downwards approximately 1/3rd the
timber diameter.
The second cut is made upwards and should meet the first cut.
Heavy stress
4. 1/3 diameter. To avoid split.
5. Weakening cut to finish.
When the timber is supported at one end only, make the first cut upwards approximately 1/3rd
the timber diameter.
The second cut is made downwards and should meet the first cut.
Overbuck
6. Down
7. Unsupported end
Underbuck
8. Up
9. Wedge
Make angled cut when one section may settle against the other.
22
Service maintenance guide
Area Maintenance Page Before use Monthly
Air filter Clean / Replace 27 •
Fuel system Inspect 27 •
Fuel filter Inspect / Clean / Replace 27 •
Oil filter Inspect / Clean / Replace 27 •
Spark plug Inspect / Clean / Adjust / Replace 27 •
Cooling system Inspect / Clean 29 •
Guide bar Inspect / Clean 28 •
Sprocket / Clutch drum Inspect / Replace 28 ••
Carburettor Adjust / Replace and adjust 28 •
Silencer Inspect / Tighten / Clean 29 •O
Chain brake Inspect / Replace 17 •O
Starter Inspect 24 •
Screws, bolts and nuts Inspect, Tighten / Replace - •O
WARNING
If not maintained properly, the product may pose a serious risk to physical health.
CAUTION
Before and after using the product, check the antivibration rubber or spring for making sure that it is not worn, cracked,
or deformed.
NOTE
If not maintained properly, the product's performance may deteriorate.
IMPORTANT
Time intervals shown are maximum.
Actual use and your experience will determine the frequency of required maintenance.
If you continuously use vegetable based chain oil, inspect and do maintenance often.
When you find anything wrong, ask your shindaiwa dealer for repair.
23
Trouble
Engine - hard to start
- does not start
Troubleshooting
Cause Remedy
Engine
cranks
Engine
does not
crank
Engine
runs
Fuel at carburettor Not fuel at carburettor Fuel filter clogged
Fuel line clogged
Carburettor
Fuel at cylinder No fuel at cylinder Carburettor Ask your shindaiwa dealer
Silencer wet with fuel Fuel mixture is too rich Open choke
Spark at end of
plug wire
Spark at plug No spark at plug Spark gap incorrect
Dies or accelerates poorly Air filter dirty
No spark at end of
plug wire
Electrical problem Ask your shindaiwa dealer
Covered with carbon
Fouled with fuel
Spark plug defective
Internal engine problem Ask your shindaiwa dealer
Fuel filter dirty
Fuel vent plugged
Spark plug
Carburettor
Cooling system plugged
Exhaust port / silencer plugged
Clean or replace
Clean
Ask your shindaiwa dealer
Clean / replace air filter
Adjust carburettor
Ask your shindaiwa dealer
Adjust 0.6 to 0.7 mm
Clean or replace
Clean or replace
Replace plug
Clean or replace
Clean or replace
Clean
Clean and adjust / replace
Adjust
Clean
Clean
Rotating saw chain at idling speed Carburettor
Clutch damaged or binded
Ask your shindaiwa dealer
Ask your shindaiwa dealer
WARNING
All chain saw service operations, other than items listed in the Operator's Manual, should be performed by
competent service personnel.
Fuel vapors are extremely flammable and may cause fire and / or explosion.
Never test for ignition spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury may
result.
NOTE
When starter grip cannot be pulled lightly, the trouble is diagnosed as failure of engine inside.
Please consult your dealer.
If disassembled inadvertently, it can cause injury.
24
Saw chain maintenance
WARNING
Switch off the engine before sharpening the chain.
Always wear gloves when working on chain.
CAUTION
The following faults will increase the risk of kickback considerably.
1) Top plate angle too large
2) File diameter too small
3) Depth gauge too large
NOTE
These angles are referred to as Oregon 21BPX and Carlton K2L saw chains.
For other branded saw chain, follow it's chain manufacturer's instruction.
Properly filed cutters are shown below.
A: Top plate angle K2L; 35°, 21BPX; 30°
B: Top plate cutting angle K2L; 60°, 21BPX; 55°
C: Depth gauge K2L; 0.71 mm, 21BPX; 0.65 mm
D: Parallel
1. Left hand cutter
2. Tie strap
3. Right hand cutter
4. Depth gauge
5. Drive link
6. Rivet
Never operate a chain saw with a dull or damaged chain.
If the chain requires excessive pressure to cut or produces dust instead of wood chips then
inspect the cutters for damage.
When sharpening the chain the objective will be to maintain the same angles and profiles
throughout its life as when it was new.
Inspect the chain for damage or wear every time you refuel your chain saw.
25
Sharpening
In order to file the chain correctly you need: round file and file holder, flat file and a depth
gauge tool.
By using the correct file size (K2L; 4.5 mm Round file, 21BPX; 4.8 mm Round file) and a file
holder, it is easier to receive a good result.
Consult your shindaiwa dealer for correct sharpening tools and sizes.
1. Lock the chain - push the front hand guard forward.
To rotate the chain - pull the front hand guard against front handle.
2. Your chain will have alternative left and right hand cutters.
Always sharpen from the inside out.
3. Keep the angle lines of the file holder parallel to the line of the chain and file the cutter
back until the damaged area (side plate and top plate) has been removed.
4. Hold the file tipped 10° upward.
5. Avoid touching the tie straps with the file.
6. Sharpen the most damaged cutter first and then take all the other cutters back to the same
length.
7. The depth control determines the thickness of wood chip produced and must be
maintained correctly throughout the chain life.
8. As the cutter length is reduced, the depth control height is altered and must be reduced.
9. Position the depth gauge, and file off any of the depth control which protrudes.
10. Round off the front of the depth control to allow smooth cutting.
11. Drive link serves to remove sawdust from the groove of the guide bar.
Therefore, keep the lower edge of the drive link sharp.
When setting of the chain is finished, soak it in oil and wash away filings completely before
using.
When the chain has been filed on the bar, supply sufficient oil to it, and rotate the chain slowly
to wash away the filings before using again.
If the chain saw is operated with filings clogged in the groove, the saw chain and the guide bar
will be damaged prematurely.
If the saw chain becomes soiled with resin for instance, clean it with kerosene and soak it in oil.
26
Service
If you have any questions or problems, please contact your shindaiwa dealer.
Air filter
1. Cleaner cover latch 2. Air cleaner cover 3. Air filter 4. Arrow
Check before every use.
Close choke.
Release the cleaner cover latch, and pull the cleaner cover while lifting it, and remove it.
Remove the air filter by turning it anticlockwise by hand.
Brush off dust lightly, or clean with compressed air, or replace the air filter.
Turn the air filter to the right by hand and install it, and tighten it securely.
(The arrow of the air filter faces upward in a standard position.)
Align the air cleaner cover with the cylinder cover and push it forward to install.
Engage the cleaner cover latch.
Check fuel system
Check before every use.
After refuelling, make sure fuel does not leak or exude from around fuel pipe, fuel grommet
or fuel tank cap.
In case of fuel leakage or exudation there is a danger of fire.
Stop using he machine immediately and request your dealer to inspect or replace.
Fuel filter
DANGER
Petrol and fuel are extremely flammable.
Extreme caution is required when handling petrol or fuel.
1. Fuel filter
2. Fuel tank cap
Check periodically.
- Do not allow dust to enter fuel tank.
- A clogged filter will cause difficulty in starting engine or abnormalities in engine
performance.
- Pick up the fuel filter through fuel inlet port with a piece of steel wire or the like.
- When the filter is dirty, replace it.
- When the inside of the fuel tank is dirty, it can be cleaned by rinsing the tank out with
petrol.
Oil filter
1. Oil filter
2. Oil tank cap
Check periodically.
- Do not allow dust to enter oil tank.
- A clogged oil filter will affect the normal lubricating system.
- Pick it up through oil filling hole with a piece of steel wire or the like.
- If the filter is dirty, wash it in petrol or replace it.
- When the inside of the oil tank gets dirty, it can be cleaned by rinsing the tank out with
petrol.
Spark plug
∗ Spark plug gap: 0.6 to 0.7 mm
Check periodically.
- The standard spark gap is 0.6 to 0.7 mm.
- Correct the spark gap if it is wider or narrower than the standard gap.
Fastening torque: 15 to 17 N•m (150 to 170 kgf•cm)
27
Guide bar
NOTE
When replacing guide bar or saw chain, ask your shindaiwa dealer.
1. Groove 2. Oil hole 3. Guide bar 4. Sprocket
Clean before using.
- Clean the groove of the guide bar with a small screw driver, for example.
- Clean oil holes with a wire.
Reverse guide bar periodically.
Check sprocket and the clutch and clean the bar mount area before installation of the guide
bar.
Replace either or both if worn.
Sprocket / Clutch drum
∗ Worn out: 0.5 mm
The damaged sprocket will cause premature damage or wear of saw chain.
- When the sprocket has worn out 0.5 mm or more, replace it.
Check sprocket when you install new chain.
Replace it if worn.
Check clutch drum, if it rotates freely and smoothly.
If not, ask your dealer for repair.
Carburettor
CAUTION
When starting, idle speed adjuster (T) should be adjusted not to rotate the saw chain.
When there is some trouble with the carburettor, contact your dealer.
T: Idle speed adjuster
Do not adjust the carburettor unless necessary.
To adjust the carburettor proceed as follows:
- Start engine and allow it to run at high idle until warm.
- Turn the idle speed adjuster (T) anticlockwise until the saw chain stops moving.
- Turn idle speed adjuster (T) anticlockwise an additional 1/2 turn.
- Accelerate to full throttle to check for smooth transition from idle to full throttle.
Automatic oiler
1. Oil adjusting screw 2. Decrease 3. Increase
The discharge volume of the automatic oiler is adjusted to 7 mL/min approximately at
7000 r/min, prior to shipment from factory.
- To increase the delivery volume, turn the adjusting screw anticlockwise.
When the adjusting screw touches stopper and stops, this position indicates maximum
discharge volume. (13 mL/min at 7000 r/min)
- Do not turn the adjusting screw beyond the maximum or minimum limit of volume
adjustment.
28
Cylinder fins (Cooling system)
1. Cylinder cover 2. Spark plug 3. Three bolts 4. Cleaner case
5. Two bolts 6. Cushion 7. Cylinder fins
Check periodically.
Clogged fins will result in poor engine cooling.
Remove the air cleaner cover and the air filter, and the spark plug lead.
Remove the three bolts of the cylinder cover.
Loosen the two mounting bolts of the cleaner case.
Lift the cylinder cover up to the cushion of the cleaner case and pull it out.
Remove dirt and dust from between fins to let cooling air pass easily.
Assemble the components in reverse order.
Do not forget to fasten the two loose bolts of the cleaner case.
Silencer
NOTE
Carbon deposits in silencer will cause drop in engine output.
The spark arrester screen must be checked periodically.
1. Silencer 2. Front hand guard 3. Bolt 4. Spark arrester screen
Remove the clutch cover and pull the front hand guard backwards.
Remove the spark arrester screen bolt and pull out the screen from the silencer body.
Clean carbon deposits from the silencer components.
Replace the screen if it is cracked, or has holes burned through.
Assemble the components in reverse order.
Replacement guide bar and chain
Length cm Guide bar Chain Clutch drum (Part number)
33 Y33S21-56ML- SD 21BPX-56E
38
45
50
Y38S21-64ML- SD
Y38R21-64AA- ST
Y45S21-72ML- SD
Y45R21-72AA- ST
Y50S21-80AL- SD
Y50R21-80AA- ST
21BPX-64E
(A556-000481)
21BPX-72E
21BPX-80E
29
Storage
Long term storage (Over 30 days)
WARNING
Do not store in an enclosure where fuel fumes may accumulate or reach an open
flame or spark.
NOTE
For future reference, you should keep this operator's manual.
Do not store your unit for a prolonged period of time (30 days of longer) without performing
protective storage maintenance which includes the following:
1. Drain the fuel tank completely and pull the recoil starter handle several times to remove
fuel from the carburettor.
2. Always store fuel in approved container.
3. Remove accumulation of grease, oil, dirt and debris from exterior of unit.
4. Perform all periodic lubrication and services that are required.
5. Tighten all the screws, bolts and nuts.
6. Remove the spark plug and pour 10 mL of fresh, clean, two-stroke engine oil into the
cylinder through the spark plug hole.
A. Place a clean cloth over the spark plug hole.
B. Pull the recoil starter handle 2 or 3 times to distribute the oil inside the cylinder.
C. Observe the piston location through the spark plug hole.
Pull the recoil starter handle slowly until the piston reaches the top of its travel and leave
it there.
7. Install the spark plug (Do not connect ignition cable).
8. Cover the chain and the guide bar with the guide bar cover before putting them in storage.
9. Store unit in a dry, dust free place, out of the reach of children and other unauthorized
persons.
30
Loading...