Makita DCS 330 TH User Manual

Owner’ s and Safety Manual

for Gasoline Chain Saws (pages 2 - 35)

Manuel d’emploi et de sécurité

de tronçonneuses thermiques (pages 36 - 69)

1997

DCS 330 TH

WARNING!

Read and understand this Manual. Always follow safety precautions in the Owner’s and Safety Manual.

This chain saw is intended for use only by tree surgeons and other persons trained in working in

trees! Improper use can cause serious injury! Keep this Instruction Manual!

The engine exhaust from this product contains chemicals known to the State of California to cause

cancer, birth defects or other reproductive harm.

ATTENTION:

Suivez toujours les conseils de sécurité du présent manuel d’emploi et de sécurité.

Cette tronçonneuse ne peut être utilisée que par un personnel élagueurs qualifié!

Une utilisation incorrecte de la tronçonneuse peut entraîner des blessures graves!

Garder avec soin le manuel d’emploi!

Les gaz d’échappement émis par ce produit contient des produits chimiques connus par l’Etat de

Californie pour provoquer le cancer, des défauts de naissance ou autres dommages de reproduction.

WARNING !

Careless or improper use of this product can cause serious or even fatal injury. Before operating a chain saw or other MAKITA products it is important that you read, fully understand and carefully follow the instructions outlined in this owners manual. Kickback may cause severe or fatal injury and is one of many potential dangers in operating a chain saw. Kickback and other safety related precautions are described in detail within this owners manual. Additional owners manuals are available from MAKITA USA, INC.,14930-C Northam Street, La Mirada, CA 90638-5753, Telephone: (714) 522 80 88 and MAKITA CANADA INC., 1950 Forbes Street, Whitby, Ontario, Canada, L1N 7B7, Telephone: (905) 571 22 00.

MAKITA DCS 330 TH

This product complies with: American National Standard Institute B 175.1-1991 chain saw safety standard.

Canadian Standards Association Z62.1-95 chain saw safety standard.

Z62.3-96 chain saw kickback standard.

Society of Automotive Engineers SAEJ 335-Jun 95 „Multiposition small

engine exhaust system fire ignition suppression”

With the purchase of this chain saw you have chosen a quality product. Important instructions for the assembly and operation of this saw are given in this manual.

The DCS 330 TH (Tophandle) is a very light and handy chain saw with the handle on the top. This model was developed especially for tree surgery and care, and may be used only by persons specially trained in tree surgery and care.

The automatic chain lubrication with variable-flow oil pump and maintenance-free electronic ignition ensure trouble-free operation, while the hand-saving anti-vibration system and ergonomic grips and controls make work easier, safer, and less tiring for the user.

The safety features of the DCS 330 TH are state of the art and meet all international safety standards. They include handguards on both grips, grip safety, chain catch, safety saw chain, and chain brake. The chain brake

can be actuated manually, and is also inertia-actuated automatically in case of kickback.

In order to ensure the proper functioning and performance of your new chain saw, and to safeguard your own personal safety, it is imperative that you read this instruction manual thoroughly before operation. Be especially careful to observe all safety precautions! Failure to observe these precautions can lead to severe injury or death!

The MAKITA DCS 330 TH will be delivered in a protective cardboard box to prevent transport damage. Cardboard is a basic raw material and is consequently reuseable or suitable for recycling (waste paper recycling).

Contents Page

Delivery inventory 3 Symbols 3 Safety precautions 4-15 Denomination of components 16 Technical data 17 Approved bar and chain combinations 17 Mounting the guide bar and saw chain 18-19 Checking the chain tension 20 Safety chain brake 20 Fuel / Refuelling 21-22 Adjusting the chain lubrication 23 Checking the chain lubrication 23 Starting the engine 24 Stopping the engine 24 Checking the safety chain brake 25 Adjusting the carburetor 25-26

Contents Page

Sharpening the saw chain 26-27 Cleaning the brake band and sprocket interior 28 Cleaning the guide bar,

lubricating the sprocket nose 28 Replacing the saw chain 29 Replacing the suction head 29 Cleaning the air filter 29 Replacing the spark plug 30 Replacing the starter cable / return spring 30-31 Cleaning the muffler / spark arrester screen 31 Cleaning the cylinder space 31 Instructions for periodic maintenance 32 Service, spare parts and guarantee 32-33 Troubleshooting 33 Extract from the spare parts list 34

Delivery inventory

1. Chain saw

2. Guide bar

3. Saw chain

4. Chain protection cover

5. Assembly tool

6. Owner’s manual (not shown)

145

In case one of the parts listed should not be included in the delivery inventory, please consult your sales agent.

Symbols

You will notice the following symbols on the chain saw and in the instruction manual:

Read instruction manual and follow the warningand safety precautions!

Warning! This saw may be used only by trained tree surgeons!

Particular care and caution!

Forbidden!

Wear protective helmet, eye and ear protection!

STOP

No open fire!

Engine stop switch

Stop engine!

Engine -manual start

Choke lever

Hold the saw with both hands while working! One-handed use is extremely hazardous!

Chaine brake

Fuel and oil mixture

Saw chain oil adjustment screw

Chain oil

Direction of chain movement

Wear protective gloves!

No smoking!

IDLE

Carburetor adjustment

First aid

CAUTION: Kickback!

Further symbols see page 5.

Safety precautions for chain saw operators

CAUTION: This chain saw is designed especially for tree care and surgery. Only persons trained in tree care and surgery may use this saw! Observe all literature, procedures and recommendations from the relevant professional organisation. Failure to do so constitutes a high accident risk! We recommend always using a rising platform (cherry picker, lift) for sawing in trees. Rappelling (abseil) techniques are extremely dangerous and require special training! The operator must be trained in and familiar with the use of safety equipment and working and climbing techniques! Always use the appropriate belts, ropes and carabiners when working in trees. Always use restraining equipment for both the operator and the saw!

While operating the chain saw please observe the following rules:

a) Contact of the guide bar nose with any object should

be avoided.

b) Tip contact may cause the guide bar to move suddenly

upward and backward, which may cause serious or fatal injury.

c) Always operate the chain saw with both hands.

WARNING!

Read and follow all safety precautions in the owner’s manual. Failure to follow instructions could result in serious injury. It is recommended to lend the chain saw only to people who are experienced in working with chain saws. Always hand over the Owner‘s and Safety Manual.

WARNING!

This chain saw is capable of severe kickback that could result in serious injury to the operator. Do not operate this chain saw unless you have extraordinary cutting needs and experience in and special training for dealing with kickback. Chain saws with significantly reduced kickback potential are available.

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. This contact may abruptly stop the saw chain and in some cases may cause a lightning fast reverse reaction, kicking the guide bar up and back towards the user, or push the guide bar back towards the operator. Kickback may cause you to lose control of the saw.

As a chain saw user, you can take several steps to reduce the risk of a kickback and potential injury.

A. With a basic understanding of kickback, you can

reduce or eliminate the element of surprise. It is a sudden surprise that contributes to accidents.

B. Keep a good firm grip on the saw with both

hands, your right hand on the rear grip and your left hand on the tubular handle, when the engine is running. Use a firm grip with thumbs and fingers encircling the chain saw handles. A firm grip can neutralize kickback and help you maintain control of the saw. Don’t let go!

C. Make sure that the area in which you are cutting

is free from obstructions. Do not let the nose of the guide bar contact the log, branch, or any other obstructions which could be hit while you

are operating the saw. D. Do not overreach or cut above shoulder height. E. Follow manufacturer’s sharpening and mainten-

ance instructions for the saw chain. F. Only use replacement bars and chains specified

by the manufacturer or the equivalent.

Additional safety precautions

The following additional safety precautions should be observed by all users of chain saws:

1. Do not operate a chain saw when you are fatigued.

2. Use safety footwear; snug-fitting clothing; protective gloves; and eye, hearing, and head protection devices.

3. Use caution when handling fuel. Move the chain saw at least 10 feet (3 m) from the fueling point before starting the engine.

4. Do not allow other persons to be near the chain saw when starting or cutting with the chain saw. Keep bystanders and animals out of the work area.

5. Do not start cutting until you have a clear work area, secure footing, and a planned retreat path from the falling tree.

6. Keep all parts of your body away from the saw chain when the engine is running.

7. Before you start the engine, make sure that the saw chain is not contacting anything.

8. Carry the chain saw with the engine stopped, the guide bar and saw chain to the rear, and the muffler away from your body.

9. Do not operate a chain saw that is damaged, is improperly adjusted, or is not completely and securely assembled. Be sure that the saw chain stops moving when the throttle control trigger is released.

10. Shut off the engine before setting it down.

11. 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.

12. When cutting a limb that is under tension be alert for springback so that you will not be struck when the tension on the wood fibers is released.

13. Keep the handles dry, clean, and free of oil or fuel mixture.

14. Operate the chain saw only in well-ventilated areas.

15. Do not operate a chain saw in a tree unless you have been specifically trained to do so.

16. All chain saw service, other than the items listed in the owner’s manual maintenance instructions, should be performed by MAKITA . (For example, if improper tools are used to remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch structural damage to the flywheel could occur and could subsequently cause the flywheel to burst.)

17. When transporting your chain saw, use the chain protection cover.

18. Low kickback bars and low kickback chains are designed to reduce the risk of kickback injury. Ask your MAKITA dealer about these devices.

General Safety Precautions

The use of any chain saw may be hazardous. At full throttle chain speed can reach 45 mph (20 m/s). It is important that you read; fully understand and observe the following safety precautions and warnings. Read the owner’s manual and the safety instructions periodically.

WARNING !

Reactive forces, including kickback, can be dangerous. Careless or improper use of any chain saw may cause serious or fatal injury.

Have your MAKITA dealer show you how to operate your chain saw. Observe all applicable local safety regulations, standards and ordinances.

Always use two hands when operating the chain saw!

XXX.YYY.ZZZ

Reduced Kickback Bar and Chain combination that has been evaluated with the power head to achieve kickback protection (according to ANSI and CSA standards).

* The Computed Kickback Angle is a calculated value from energies measured on a test bench. It is

not the angle of the guide bar moved upward in case of a KICKBACK.

The operator

Physical Condition

You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol), which might impair vision, dexterity or judgment.

WARNING!

Minors should never be allowed to use a chain saw. Bystanders, especially children and animals should not be allowed in the area where a chain saw is in use (fig. 1). Never let the saw run unattended. Store it in a locked place away from children. Fill the fuel tank to 7/8 th full (see storing the saw). Do not lend your chain saw without this owner’s manual. Be sure that anyone using your saw understands the information given.

Proper use of a chain saw involves

1. the operator

2. the saw

3. the use of the saw.

max. CKA 21

Maximum Computed Kickback Angle (CKA)* without using the chain brake when using the recommended bar and chain combinations (In this example the CKA is 21°).

Contact of the guide bar tip with any object should be avoided! Tip contact may cause the guide bar to move suddenly upward and backward, which may cause serious injury!

WARNING !

Prolonged use of chain saws exposing the operator to vibrations may produce Whitefinger disease (Raynaud’s phenomenon). This phenomenon reduces the hand’s ability to feel and regulate temperature, produces numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.

All MAKITA saws are therefore provided with an antivibration system which is essential for those using chain saws on a regular or sustained basis. Antivibration systems do not guarantee that you will not sustain Whitefinger disesase, however, they reduce this danger considerably. Nevertheless, continual and regular users should observe their hands and fingers and in case of any abnormal symptoms, seek medical advice immediately.

Proper clothing

The saw

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, or anything that could become entangled with the saw or brush. Wear overalls or jeans with a reinforced cutting resistant insert (fig. 3).

Protect your hands with gloves when handling saw and saw chain. Heavy-duty, nonslip gloves improve your grip and protect your hands.

Parts of the chain saw: illustrations and description of parts see page 16.

WARNING !

Never modify a chain saw in any way. Only attachments supplied by MAKITA or expressly approved by MAKITA for use with the specific saw are authorized.

WARNING !

Bow guide bars substantially increase the potential for kickback and severe or fatal injury due to the greater kickback zone of the bow design. Bow guide bars are not recommended for use on MAKITA chain saws nor are they approved by the ANSI B 175.1-1991 chain saw safety standard.

The use of the saw

Transporting the chain saw

Good footing is most important in chain saw work. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended.

Proper eye protection is a must. Non-fogging, vented goggles and a face screen is recommended. Their use reduces the risk of eye and facial injury.

Wear an approved safety hard hat to protect your head. Chain saw noise may damage your hearing. Always wear noise protection equipment (ear plugs or ear muffs) to protect your hearing.

Continual and regular users should have their hearing checked regularly.

WARNING!

Always stop the engine before putting a chain saw down or carrying it. Carrying a chain saw with the engine running is extremely dangerous. Accidental acceleration of the engine can cause the chain to rotate. Avoid touching the hot muffler.

By hand: When carrying your saw by hand, the engine must be stopped and the saw must be in the proper position. The chain protection cover should be over the chain and the guide bar must point backwards. When carrying your saw the bar should be behind you (fig. 4).

Wear protective helmet, eye and ear protection

By vehicle: When transporting in a vehicle, keep chain and bar covered with the chain guard. Properly secure your saw to prevent turnover, fuel spillage and damage to the saw. Make sure the saw is not exposed to heat or sparks.

Chain saw operating instructions

For assembly follow the procedure in the appropriate section "Mounting Guide Bar and Chain" of this manual. MAKITA chain, guide bar and sprocket must match each other (see the appropriate section in this manual).

WARNING!

Proper tension of the chain is extremely important. In order to avoid false setting the tensioning procedure must be followed as described in this manual. Always make sure the hexagonal nut(s) for the sprocket guard is (are) tightened securely after tensioning the chain. Check chain tension once more after having tightened the nuts and thereafter at regular intervals (always before starting to work). If the chain becomes loose while cutting, shut off the engine and then tighten. Never try to tighten the chain while the engine is running!

Fueling

Your MAKITA saw uses on oil-gasoline mixture for fuel (see chapter "Fuel" of this manual).

Wipe off any spilled fuel before starting your saw and check for leakage.

Check for fuel leakage while refueling and during operation. If fuel or oil leakage is found, do not start or run the engine until leak is fixed and spilled fuel has been wiped away. Clothing with fuel on it has to be changed immediately (this is a danger to your life!). Avoid skin contact with fuel. Never loosen or remove the cap of the fuel tank while the engine is running.

Starting

Do not drop start. This method is very dangerous because you may lose control of the saw (fig. 6).

WARNING!

Gasoline is an extremely flammable fuel. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any sparks or flame near the fuel (fig. 5).

Fueling instructions

Fuel your chain saw in well ventilated areas or outdoors. Always shut off the engine and allow it to cool before refueling. Select bare ground for fueling and move the chain saw at least 10 feet (3 m) from fueling spot before starting the engine (fig. 5a).

Place the chain saw on firm ground or other solid surface in an open area. Maintain a good balance and secure footing. Place your right foot through the rear handle opening and firmly grasp the front handle with your left hand (fig. 6a).

Be absolutely sure that guide bar and chain are clear of you or all other obstructions and objects, including the ground, because when the engine starts in semithrottle position, engine speed will be fast enough for the clutch to engage the sprocket and turn the chain which may cause a kickback. Never attempt to start the saw when the guide bar is in a cut or kerf.

10 feet

When you pull the starter grip, don’t wrap the starter rope around your hands. Do not allow the grip to snap back, but guide the starter rope slowly back to permit the rope to rewind properly. Failure to follow this procedure may result in injury to hand or fingers and may damage the starter mechanism.

Important adjustments

WARNING!

At correct idle speed, chain should not turn. For directions to adjust idle speed, see the appropriate section of this instruction manual.

Do not use a saw with incorrect idle speed adjustment. Adjust the idle speed yourself according to the appropriate section of this manual.

Have your MAKITA dealer check your saw and make proper adjustments or repairs.

Check the saw chain tension frequently, especially just after installing a new chain. New chains may stretch more during their initial use. A properly adjusted saw chain can be pulled freely around the guide bar by hand without sagging. Always stop the engine and wear gloves when checking or adjusting the chain tension.

Working conditions

Wrap your fingers tightly around the handles, keeping the handles cradled between your thumb and forefinger (fig. 7). With your hands in this position, you can best oppose and absorb the push, pull and kickback forces of your saw without having it slip out of your grip (see section of reactive forces). Make sure your chain saw handle and grip are in good condition and free of moisture, pitch, oil or grease.

Always start a cut with the chain running at full speed and the spike bar in contact with the wood.

WARNING!

Never use the saw with one hand. You cannot control reactive forces (see pages 9 to 11) and may lose control of the saw.

Operate your chain saw only outdoors. Operate the saw under good visibility and daylight conditions only.

WARNING!

Take extreme care in wet and freezing weather (rain, snow, ice). Put off the work when the weather is windy, stormy or rainfall is heavy. Clear the area where you are working.

WARNING!

Avoid stumbling on obstacles such as stumps, roots or rocks and watch out for holes or ditches. Be extremely cautious when working on slopes or uneven ground. There is increased danger of slipping on freshly debarked logs.

Cutting instructions

Always hold the saw firmly with both hands when the engine is running. Place your left hand on the tubular handle and your right hand on grip and throttle lever. Left-handers should follow these instructions too.

WARNING!

Do not operate your chain saw in semi-throttle position. Cutting in this position does not permit the operator proper control of the saw or chain speed.

WARNING!

Never come too close to a rotating chain with your hands or body.

WARNING!

Do not cut any material other than wood or wooden objects.

Use your chain saw for cutting only. It is not designed for prying or shoveling away limbs, roots or other objects.

When sawing, make sure that the saw chain does not touch any foreign materials such as rocks, nails and the like (fig. 8). Such objects may be flung off, damage the saw chain or cause the saw to kick back.

In order to keep control of your saw, always maintain a firm foothold. Never work on a ladder, in a tree or on any other insecure support. Never use the saw above shoulder height (fig. 9).

Position the chain saw in such a way that your body is clear of the cutting attachment whenever the engine is running (fig. 10).

Don’t put pressure on the saw when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control and strike the operator or some other object. If the rotating chain strikes some other object a reactive force (see pages 10 to 12 ) may cause the chain to strike the operator.

Reactive forces during the cut, including kickback

WARNING!

Reactive forces, that may occur during any cut are kickback, pushback and pull-in. Reactive forces can be dangerous! In any chain saw, the powerful force used to cut wood can be reversed (and work against the operator).

If the rotating chain is suddenly stopped by contact with any solid object like a log or branch or is pinched, the reactive forces instantly occur. These reactive forces may result in loss of control which may, in turn, cause serious or fatal injury. An understanding of the causes of these reactive forces may help you avoid loss of control.

The most common reactive forces are

- kickback,

- pushback,

- pull-in.

Kickback:

Kickback occurs when the upper quadrant of the bar nose contacts a solid object in the wood or is pinched (fig. 11). The reaction of the cutting force of the chain causes a rotational force of the chain saw in the direc tion opposite to the chain movement, mainly in the plane of the bar. This may fling the bar in an uncontrolled arc towards the operator.

This reaction can occur in a fraction of a second and under some circumstances, cause the guide bar and chain to strike the operator with enough force to cause severe or fatal injury. It may also occur during limbing. It also occurs when the nose of the guide bar is pinched unexpectedly, unintentionally contacts solid material in the wood (fig.12) or is incorrectly used to begin a plunge or boring cut.

The greater the force of the kickback reaction, the more difficult it becomes for the operator to control the saw.

Many factors influence the occurence and force of the kickback reaction. The type of bar and saw chain you use is a factor in the force of the kickback reaction.

The speed of contact at which the cutter contacts the object.

Kickback force increase with the rate of impact.

The contact angle between the nose of the bar and the foreign object (fig. 11).

Kickback is most pronounced in the upper quadrant of the bar nose.

MAKITA chain types are designed to reduce kickback forces.

The depth gauges:

Improper lowering of the depth gauges also increases the risk of a kickback.

To avoid kickback

The best protection from personal-injury that may result from kickback is to avoid kickback situations:

1. Hold the chain saw firmly with both hands and maintain a secure grip.

Saw chain cutter sharpness:

WARNING!

A dull improperly sharpened chain may increase the risk of kickback. Always cut with a properly sharpened chain.

Devices for reducing the risk of kickback injury

MAKITA have developed a special chain brake to reduce the risk of kickbacks.

This chain brake increases the safety factor on the job, e.g. when the saw suddenly kicks upwards the chain stops rotating within a fraction of a second. A deflection guard on the disengaging lever of the chain brake and a loop rear handle ensure that the operator’s hands are fully protected at all times.

Kickback tendency increases as the radius or size of the guide bar nose increases. MAKITA have developed guide bars with small nose radius, to reduce the kickback tendency.

WARNING!

No chain brake prevents kickback.

These brakes are designed only to stop the chain, if activated.

To ensure a proper operation of the chain brake, it must be properly maintained. Furthermore, there must be a sufficient distance between the operator and the bar to ensure that the chain brake has sufficient time to activate and stop the chain before potential contact with the operator.

2. Be aware of the location of the guide bar nose at all times.

3. Never bring the nose of the guide bar in contact with any object. Do not cut limbs with the nose of the guide bar. Be especially careful with small, tough limbs, small size brush and saplings which may easily catch the chain.

4. Don’t overreach.

5. Don’t cut above shoulder height.

6. Begin cutting and continue at full throttle.

7. Cut only one log at a time.

8. Use extreme caution when re-entering a previous

cut.

9. Do not attempt plunge cuts (see page 13) if you are not experienced with these cutting techniques.

10. Be alert for shifting of the log or other forces that may cause the cut to close and pinch the chain.

11. Maintain saw chain properly. Cut with a correctly sharpened, properly tensioned chain at all times.

12. Stand to the side of the cutting path of the chain saw.

Pushback:

To avoid pull-in

Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain drives the saw straight back toward the operator causing loss of saw control. Pushback frequently occurs when the top of the bar is used for cutting (fig. 14).

To avoid pushback

1. Be alert to forces or situations that may cause material to pinch the top of the chain.

2. Do not cut more than one log at a time.

3. Do not twist the saw when withdrawing the bar from a plunge cut or under buck cut (figures 25 to 27 and 33, pages 13 and 14), because the chain can pinch.

Pull-in:

Pull-in occurs when the chain on the bottom of the bar is suddenly stopped. The chain on the bottom of the bar stops when it is pinched, caught or encounters a foreign object in the wood (see fig. 15). The reaction of the chain pulls the saw forward, causing the operator to lose control.

1. Always start a cut with the chain rotating at full speed and the spike bar in contact with the wood.

2. Pull-in may also be prevented by using plastic wedges to open the kerf or cut.

Cutting techniques

Felling

Felling is cutting down a tree. Before felling a tree, consider carefully all conditions

which may affect the direction of fall, including: The intended direction of the fall.

The neutral lean of the tree. Any unusually heavy limb structure. Surrounding trees and obstacles. The wind direction and speed.

WARNING!

Always observe the general condition of the tree. Look for decay and rot in the trunk. If it is rotted inside, it could snap and fall toward the operator while being cut. Also look for broken or dead branches which could vibrate loose and fall on the operator. When felling on a slope, the operator should stand on the up-hill side.

Pull-in frequently occurs when the spike bar of the saw is not held securely against the tree or limb and when the chain is not rotating at full speed before it contacts the wood.

WARNING!

Use extreme caution when cutting small size brush and saplings which may easily catch the chain and pull you off balance.

When felling in the vicinity of roads, railways and power lines, etc., take extra precautions (see fig.

16). Inform the police, utility company or railway authority before beginning to cut.

45°

= cutting down area

When felling, maintain a distance of at least 2 1/2 tree lengths from the nearest person (see fig. 17)

Note:

The noise of your engine may drown any warning call.

Felling instructions:

First cut

Second cut

If the tree has large buttress roots, cut into the largest buttresses vertically first (horizontally next) and remove (fig. 20).

Direction of fall

First clear the tree base and work area from interfering limbs and brush and clean its lower portion with an axe (see fig. 18).

45°

Then, establish a path of escape and remove all obstacles. This path should be opposite to the planned direction of the fall of the tree and at a 45° angle (fig.

19). An alternate path must also be selected. Place all tools and equipment a safe distance away from the tree, but not on the escape path.

Felling cut

(4cm)

1/10∅

Hinge Felling notch

1/5∅

Felling notch

Hinge

Then, determine the placement of the felling notch (fig. 21). The felling notch when properly placed determines the direction in which the tree will fall. It is made perpendicular to the line of fall and should be as close to the ground as possible. Cut the felling notch to a depth of about one-fifth to one-fourth of the trunk diameter (fig. 22). It should be in no case higher than it is deep. Make the felling notch very carefully.

Begin the felling cut slighty higher than the felling notch and on the opposite side of the tree (fig. 22). Then cut horizontally through towards the felling notch. Apply the chain saw with its spikes directly behind the uncut portion of wood and cut toward the notch (fig.

23). Leave approximately 1/10 of the tree diameter uncut! This is the hinge (fig. 23). Do not cut through the hinge because you could lose control of the direction of the fall. Drive wedges into the felling cut where necessary to control the direction of the fall. Wedges should be of wood, light alloy or plastic - never of steel, which can cause kickback and damage to the chain.

Always keep to the side of the falling tree. When the tree starts to fall, shut off the engine, withdraw the bar and walk away on the pre-planned escape path. Watch out for falling limbs.

WARNING!

Be extremely careful with partially fallen trees which are poorly supported.

Plunge-Cut Method

Timber having a diameter more than twice the length of the guide bar requires the use of the plunge-cut method before making the felling cut. First, cut a large, wide notch. Make a plunge cut in the center of the notch. The plunge cut is made with the guide bar nose. Begin the plunge cut by applying the lower portion of the guide bar nose to the tree at an angle (fig. 25). Cut until depth of the kerf is about the same as the width of the guide bar (fig. 26). Next, align the saw in the direction in which the

When the tree hangs or for some other reason does not fall completely, set the saw aside and pull the tree down with a cable winch, block and tackle or tractor. If you try to cut it down with your saw, you may be injured.

Sectioning Method

WARNING!

Felling a tree that has a diameter greater than the length of the guide bar requires use of either the sectioning or plunge-cut method. These methods are extremely dangerous because they involve the use of the nose of the guide bar and can result in kickback. Only properly trained professionals should attempt these techniques.

recess is to be cut. With the saw at full throttle, insert the guide bar in the trunk (fig. 27).

Enlarge the plunge cut as shown in illustration (fig. 28)

For the sectioning method (fig. 24) make the first cut with the guide bar fanning in toward the hinge. Then, using the bumper spike as a pivot, reposition the saw for the next cut. Avoid repositioning the saw more than necessary. When repositioning for the next cut, keep the guide bar fully engaged in the kerf to keep the felling cut straight. If the saw begins to pinch, insert a wedge to open the cut. On the last cut, do not cut the hinge.

Bucking

WARNING!

There is an extreme danger of kickback at this point. Extra caution must be taken to maintain control of the saw. To make the felling cut, follow the sectioning method described previously (fig.

29). If you are inexperienced with a chain saw plunge-cutting should not be attempted. Seek the help of a professional.

Limbing

Limbing is removing the branches from a fallen tree.

Bucking is cutting a log into sections.

WARNING!

1. When bucking, do not stand on the log. Make sure the log will not roll down-hill. If on a slope, stand on the up-hill side of the log (see fig. 31). Watch out for rolling logs.

WARNING!

There is an extreme danger of kickback during the limbing operation. Do not work with the nose of the bar. Be extremely cautious and avoid contacting the log or other limbs with the nose of the guide bar. Do not stand on a log while limbing it - you may slip or the log may roll.

Start limbing by leaving the lower limbs to support the log off the ground (fig. 30). Always cut from the top of the limb. Do not underbuck freely hanging limbs. A pinch may result or the limb may fall, causing loss of control. If a pinch occurs, stop the engine and remove the saw, by lifting the limb.

2. Cut only one log at a time.

WARNING!

3. Shattered wood should be cut very carefully. Sharp slivers of wood may be caught and flung in the direction of the operator of the saw.

WARNING!

4. When cutting small logs, use a sawhorse (fig. 32). Never permit another person to hold the log. Never hold the log with your leg or foot.

WARNING!

Be extremely cautious when cutting limbs under tension. The limbs could spring back toward the operator and cause loss of control of the saw or injury to the operator.

1. Relieving cut

2. Cross cut

Tension side

Pressure side

1. Relieving cut

Pressure side

Tension side

Maintenance and Repair

Never operate a chain saw that is damaged, improperly adjusted or not completely or securely assembled. Follow the maintenance and repair instructions in the appropriate section of this manual.

WARNING !

Always stop the engine and make sure that the chain is stopped before commencing any maintenance or repair work or cleaning the saw. Do not attempt any maintenance or repair work not described in this manual. Have such work performed by your MAKITA service shop only.

Maintaining and storing the saw

Keep the chain, bar and sprocket clean and lubricated; replace worn sprockets or chains.

WARNING!

5. Logs under strain require special attention to prevent the saw from pinching. The first cut is made on the compression side to relieve the stress on the log (see fig. 33, 34). The bucking cut is then made as shown. If the saw pinches, stop the engine and remove it from the log.

Keep the chain sharp. You can spot a dull chain when easy-to-cut wood becomes hard to cut and burn marks appear on the wood.

Keep the chain at proper tension. Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.

Keep spark plug and wire connection tight and clean. Store saws in a high or locked place, away from

children.

WARNING!

6. Only properly trained professionals should work in an area where the logs, limbs and roots are tangled (i. e. a blowdown area, fig. 35). Working in blowdown areas is extremely hazardous.

WARNING!

7. Drag the logs into a clear area before cutting. Pull out exposed and cleared logs first.

Denomination of components

16 15

2 3 4 5

1314

10 91112

19 2018

1 Rear handle 2 Safety locking button (throttle lock) 3 Throttle lever 4 Stop knob for halfway throttle 5 Hand guard (release for chain brake) 6 Spike bar (accessories)

(toothed stop for holding saw steady against wood)

7 Chain 8 Guide bar

9 Chain protection cover 10 Retaining nut 11 Chain catch 12 Sprocket guard 13 Muffler with spark arrester screen

27 26 25

222324

14 Serial number 15 Adjusting screw for oil pump 16 I/STOP-switch 17 Front grip (tubular handle) 18 Filter cover 19 Starter grip 20 Carabiner or rope attachment point 21 Spark plug 22 Oil tank cap 23 Fan housing with starting assembly 24 Fuel tank cap 25 Idle adjustment screw 26 Choke 27 Adjusting screws "H-L" for carburetor

Technical data DCS 330 TH

Single-cylinder two-stroke

Piston displacement 1.96 cu. in (32.3 cm3) Cylinder bore 1.45" (37 mm) Piston stroke 1.18" (30 mm) Max. power at speed 1.0 / 7,000 kW/rpm Max. torque at speed 1.45 / 5,800 Nm/rpm Idling speed / max. engine speed with bar and chain 2,800 rpm / 11,000 rpm

Sound Pressure Level at the operator’s ear at full load according to ANSI B 175.1 100 db(A)

Sound Pressure Level at the bystander’s position (50ft/15 m distance) according to ANSI B 175.1 76 db(A)

Ignition system

Electronic, without breaker Spark plug CHAMPION RCJ 8 or Spark plug Electrode gap .020" (0.5 mm)

Fuel system

Carburetor WALBRO WT with limiter caps (all position diaphragm carburetor with integral fuel pump) Fuel tank capacity 8.8 oz. (0.25 l) Fuel mixture see chapter "Fuel"

NGK BMR 6A

Weight

without cutting attachment 7 lbs. 15 oz. (3.6 kg)

Cutting attachment

Guide bar sprocket nose bar Cutting length 14" (35 cm) Safety saw chain (pitch) 3/8 Drive link gauge .050 Chain sprocket 6 teeth

Chain lubrication fully automatic oil pump (variable-flow) Oil tank capacity 5.6 oz. (0.16 l)

Approved bar and chain combinations

"Low-kickback saw chain is a chain which has met the kickback performance requirements of ANSI B 175.11991 (American National Standard for Power ToolsGasoline-Powered Chain Saws-Safety Requirements) when tested on the representative sample of chain saws below 3.8. C.l.D. specifed in ANSI B 175.11991". The approved bar and chain combinations are low kickback chains according to ANSI B 175.1-1991 and also meet the kickback requirements of CSA

Z62.3-96 for chain saws below 80 cm

The chain saw DCS 330 TH has been approved with following guide bar and chain combinations:

Drive link gauge .050"

Do not use other replacement bars and chains unless they have been designated as meeting the ANSI B 175.1-1991 (for USA) and CSA Z62.3-96 (for Canada) kickback performance requirements on that specific powerhead, or has been designated as "low kickback" saw chain in accordance with the ANSI B 175.1-1991 (for USA) and CSA Z62.3-96 (for Canada) standard.

WARNING

MAKITA: Guide bar 3/8" Saw chain 3/8" length Part no. Part no.

14" (35 cm) 1682473 91VG-52E

OREGON: Guide bar 3/8" Saw chain 3/8" length Part no. Part no.

14" (35 cm) 140SDEA041 91VG-52E

"There may be other replacement bar and chain combinations available that also reduces the risk of injury from kickback".

PUTTING INTO OPERATION

CAUTION:

Before doing any work on the guide bar or chain, always

STOP

1 2

switch off the engine and pull the plug cap off the spark plug (see "Replacing the spark plug"). Always wear protective gloves!

CAUTION:

Do not start the saw until it has been completely assembled and inspected!

Mounting the guide bar and saw chain

Use the universal wrench delivered with the chain saw for the following work.

Put the chain saw on a stable surface and carry out the following steps for mounting the guide bar and chain:

Disengage the chain brake by pulling the hand guard (1) in the direction of the arrow.

Unscrew retaining nut (2). Spread the sprocket guard (3) slightly, push it out of the

mounting (4) and remove it.

Remove the transport cover (5). Turn the chain tensioning screw (6) to the left (counter-clock-

wise) until the lug (7) is below the guide pin (8).

678

Position the guide bar (9). Make sure that the pin (10) of the chain tightener is in the hole on the guide bar.

11 13

12 11

Lift the chain (11) over the clutch drum and onto the sprocket (12). Using your right hand, guide the chain into the top guide groove on the guide bar. Note that the cutting edges along the top of the chain must point in the direction of the arrow!

Lead the chain (11) around the sprocket nose (13) of the guide bar.

NOTE:

The chain should be easy to pull in the direction of the arrow. The clutch drum (E/12) should turn with the chain (the sprocket engages the chain).

First push the sprocket guard (3) into the mounting (4) and then over the mounting bolt (14).

NOTE:

If the chain brake on the dismounted chain guard is inadvertently actuated, it will not be possible to push the sprocket guard all the way over the mounting bolt. You will first have to release the chain brake (Fig. B).

Tighten the mounting nut (2) hand-tight.

Tightening the saw chain

Turn the chain tightener (C/6) to the right (clockwise) until the chain engages the guide groove of the bottom side of the bar (see circle).

Slightly lift the end of the guide bar and turn the chain adjusting screw (C/6) to the right (clockwise) until the chain rests against the bottom side of the guide bar.

While still holding up the guide bar, tighten the retaining nut (2) with the universal wrench.

STOP

Checking the chain tension

The tension of the chain is correct if the chain rests against the bottom side of the guide bar and can still be easily turned by hand.

While doing so the chain brake must be released. Check the chain tension frequently - new chains tend to get

longer during use! When checking the chain tension the engine must be

off.

NOTE:

It is recommended to use 2-3 chains alternatively. In order to guarantee uniform wear of the guide bar the bar

should be turned over whenever replacing the chain.

switched

Chain brake

The DCS 330 TH comes with an inertia chain brake as standard equipment. If kickback occurs due to contact of the guide-bar tip with wood (see SAFETY PRECAUTIONS, pages 5, 9, 10), the chain brake will stop the chain through inertia activation if the kickback is strong enough.

The chain will stop within a fraction of a second.

The chain brake is installed to block the saw chain before starting the engine and to stop it immediately in case of an kickback emergency.

Engaging the chain brake (braking)

If the kickback is strong enough the sudden acceleration of the guide bar combined with the inertia of the hand guard (2) will automatically actuate the chain brake.

To engage the chain brake manually, simply push the hand guard (2) forward (towards the tip of the saw) with your left hand (arrow 1).

Releasing the chain brake

Pull the hand guard (2) towards you (arrow 2) until you feel it catch. The brake is now released.

Fuel CAUTION:

This saw is powered by mineral-oil products (gasoline (petrol) and oil).

Be especially careful when handling gasoline (petrol). Avoid all flame or fire. Do not smoke (explosion hazard).

Fuel mixture

The engine of the chain saw is a high-efficiency two-stroke engine. It runs on a mixture of gasoline and two-stroke engine oil.

The engine is designed for unleaded regular gasoline with a min. octane value of 91 ROZ. In case no such fuel is available, you can use fuel with a higher octane value. This will not affect the engine.

In order to obtain an optimum engine output and to protect your health and the environment use unleaded fuel only. Gasoline which contens alcohol should not used in MAKITA products.

For lubricating the engine use a two-stroke engine oil (quality grade: TC-3), which is added to the fuel.

The correct mixture ratio: 25:1 Mix 25 parts fuel and 1 part oil.

Gasoline

25:1

OIL

1.0 US-gal. (3.7 l) 5.0 floz (150 cm3)

2.5 US-gal. (9.4 l) 12.8 floz (378 cm3)

5.0 US-gal. (18.9 l) 25.6 floz (756 cm3)

NOTE:

Fuel cannot be stored for an unlimited period of time. Buy only as much as will be consumed in 4 weeks.

Use only approved and marked containers for transport and storage.

NOTE:

For preparing the fuel-oil mixture first mix the entire oil quantity with half of the fuel required, then add the remaining fuel. Shake the mixture thoroughly before pouring it into the tank.

Note: Carefully open the fuel tank cap. Pressure may have built up in the tank!

It is not wise to add more engine oil than specified to ensure safe operation. This will only result in a higher production of combustion residues which will pollute the environment and clog the exhaust channel in the cylinder as well as the muffler. In addition, fuel consumption will rise and performance will decrease.

Chain oil

Use an oil with adhesive additive for lubricating the chain and guide bar. The adhesive additive prevents the oil from being flung off the chain too quickly.

We recommend the use of chain oil which is bio-degradable in order to protect the environment. The use of bio-degradable oil may even be required by local regulations.

The chain oil BIOTOP sold by MAKITA is made of special vegetable oils and is 100% bio-degradable. BIOTOP has been granted the "blue angel" (Blauer Umweltschutz-Engel) for being particularly environment-friendly (RAL UZ 48).

AVOID SKIN AND EYE CONTACT

Mineral oil products degrease your skin. If your skin comes in contact with these substances repeatedly and for an extended period of time, it will desiccate. Various skin deseases may result. In addition, allergic reactions are known to occur.

Eyes can be irritated by contact with oil. If oil comes into your eyes, immediately wash them with clear water.

If your eyes are still irritated, see a doctor immediately!

BIOTOP chain oil is available in the following sizes:

1 l 5 l 20 l

Bio-degradable oil is stable only for a limited period of time. It should be used within 2 years from the date of manufacture (printed on the container).

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