Efco Power MTT 3600 Operator's Instruction Manual

MTT 3600 (2.15 cu.in)

OPERATOR’S INSTRUCTION MANUAL

MANUEL D’UTILISATION ET D’ENTRETIEN

MANUAL DE INSTRUCCIONES

WARNING! – This saw is for tree service operators only. Use without proper training can result in severe injuries.

ATTENTION! – L’emploi de cette tronçonneuse est réservé aux opérateurs du secteur de l’entretien des espaces. L'utilisation sans une formation adéquate peut provoquer des blessures extrêmement graves.

¡ATENCIÓN! - Esta motosierra es sólo para personal adiestrado en el mantenimiento de los árboles. El uso sin un adiestramiento adecuado puede causar daños físicos de extrema gravedad.

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CMR7A

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English 5

Français 29

Español 55

INTRODUCTION

To correctly use the chain saw and prevent accidents, do not start work without having first carefully read this manual. You will find explanations concerning the operation of the various parts plus instructions for necessary checks and relative maintenance.

Note: Illustrations and specifications in this manual may vary according to Country requirements and are subject to change without notice by the manufacturer.

THE OPERATOR’S MANUAL

Your operator’s manual is for your protection. READ IT. Keep it in a safe place for reference. Know what you are doing before you begin assembly of the unit. Proper preparation and upkeep go hand-in-hand with satisfactory performance of the saw and safety. Contact your dealer or the distributor for your area if you do not understand any of the instructions in this manual. In addition to the operating instructions, this manual contain paragraphs that require your special attention. Such paragraphs are marked with the symbols described below: Warning: where there is a risk of an accident or personal injury or serious damage to property. Caution: where there is a risk of damaging the machine or its individual components.

WARNING - To ensure safe and correct operation of the chainsaw, this operator's

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manual should always be kept with or near the machine. Do not lend or rent your chainsaw without the operator's instruction manual.

WARNING: Allow only persons who understand this manual to operate your

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chainsaw.

CONTENTS

1. UNDERSTANDING SAFETY LABELS __ 5

2. CHAIN SAW COMPONENTS _________ 5

3. SAFETY RULES ___________________ 6

4. ASSEMBLING THE BAR AND CHAIN __ 13

5. STARTING _______________________ 15

6. STOPPING THE ENGINE ____________ 18

7. USE ____________________________ 18

8. MAINTENANCE ___________________ 20

9. STORAGE ________________________ 26

10. TECHNICAL DATA _________________ 27

11. TROUBLE SHOOTING CHART _______ 28

1. UNDERSTANDING SAFETY LABELS (Fig.1)

1. This symbol indicates Warning, and Caution.

2. WARNING! Beware of Kickback. Avoid bar

nose contact.

3. Wear safety strong shoes or boots having skid-proof sole and anti-piercing insert.

4. Your manual contains special messages to bring attention to potential safety concerns, machine damage as well as helpful operating and servicing information. PLEASE READ ALL THE INFORMATION CAREFULLY TO AVOID INJURY AND MACHINE DAMAGE.

5. Wear eye, hearing and head protection when operating this equipment.

6. Always hold saw properly with both hands.

7. Primer bulb

8. Chain brake, activated (right). Chain brake, not activated (left).

9. WARNING! The surface can be hot!

2. CHAIN SAW COMPONENTS (Fig. 2)

1. Choke lever

2. Throttle trigger

3. Throttle trigger lockout

4. Carburetor adjustment screws

5. Inertial brake lever

6. Exhaust muffler

7. Chain

8. Guide bar

9. Air filter cover

10. STOP button

11. Fuel tank cap

12. Starter handle

13. Oil tank cap

14. Primer bulb

15. Lateral chain tensioner screw

16. Front handle

17. Rear handle

18. Bar cover

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3. SAFETY RULES

State and Local Requirements

The engine is NOT equipped with a Spark Arrester System complying with the requirements of SAE

Recommended Practice J335 and California Codes 4442 and 4443. All national forest land and land

managed by the states of California, Maine, Washington, Idaho, Minnesota, New Jersey and Oregon require internal combustion engines to

be equipped with a spark arrester screen by law. Other states and federal agencies are

enacting similar regulations.

Operating this engine in a state or locale where

such regulations apply, could result in a violation of the law.

Note: When using a chainsaw for logging purposes, refer to Code of Federal

Regulations, Parts 1910 and 1928.

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WARNING: The ignition system of your unit produces an electromagnetic

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field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.

WARNING: Muffler surfaces are very hot during and after operation of the

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chain saw, keep all body parts away from the muffler. Serious burns may occur if contact is made with the muffler.

WARNING: Exposure to vibrations through prolonged use of gasoline

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powered hand tools could cause blood vessel or nerve damage in the fingers, hands,

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and wrists of people prone to circulation disorders or abnormal swellings. Prolonged use in cold weather has been linked to blood

vessel damage in otherwise healthy people. If symptoms occur such as numbness, pain, loss

of strength, change in skin color or texture, or loss of feeling in the fingers, hands, or wrists, discontinue the use of this tool and seek medical attention.

WARNING: The engine exhaust from this product contains chemicals known

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to the State of California to cause cancer, birth defects or other reproductive harm. Operate your chainsaw outdoors only in a well ventilated area.

SAFETY RULES FOR TREE SERVICE CHAIN SAW

This chain saw for tree service is a specialized chain-saw of limited weight designed for use by a trained and competent operator for pruning and dismantling standing tree crowns.

A trained operator is a person who has competence and knowledge in:

- the use and particular hazards associated with using a chain-saw (for tree service work),

- the precautions to be taken to limit these hazards including wearing recommended personal protective equipment (PPE).

Due to the special compact handle design, there is an increased risk of injury. For this reason these special chainsaws should be used only for work in a tree by persons who are trained in special cutting and working techniques and who are properly secured (lift bucket, ropes, safety harness). For all other cutting work forestry chain saws (with wider spaced handles) must be used.

In addition to the safety instructions listed in the following pages of the manual, when using a tree service chain saw take special attention to the following instructions:

• The specially shaped handgrip on the machine calls for particular care when dealing with kickback.

• Extreme care should be taken at the end of a cutting operation in relation to the machine suddenly dropping. This eventuality is difficult to control with this type of handgrip.

• Attention should be paid to chain sliding. Instead of penetrating the tree trunk, the chain may slide forward and the operator will not be able to fully control this action.

• Tree maintenance operators must be trained in the correct operative techniques concerning safety at work, i.e.: headgear,

safety harnesses, cables and spring-clips, as well as all of the other safety devices that are normally used and must be trained professionally in tree climbing.

• Pay attention to wires while working; always keep distance from them.

• Release machine from hook point while refuelling.

WORKING WITH TREE SERVICE CHAIN-SAWS FROM A ROPE AND HARNESS

This chapter sets out working practices to reduce the risk of injury from tree service chainsaws when working at height from a rope and harness. While it may form the basis of guidance and training literature, it should not be regarded as a substitute for formal training.

General requirements working at height

Operators of tree service chainsaws working at height from a rope and harness should never work alone. A competent ground worker trained in appropriate emergency procedures should assist them. Operators of tree service chainsaws for this work should be trained in general safe climbing and work positioning techniques and shall properly equipped with harnesses, ropes, strops, karabiners and other equipment for maintaining secure and safe working positions for both themselves and the saw.

Preparing to use the saw in the tree

The chainsaw should checked, fuelled, started and warmed up by the ground worker before it is sent up to the operator in the tree. The chainsaw should be fitted with a suitable strop for attaching to the operator’s harness (Fig. 16): a) choke the strop around the attachment point

on the rear of the saw (Fig. 21);

b) provide suitable karabiners to allow indirect

(i.e. via the strop) and direct attachment (i.e. at the attachment point on the saw) of saw to the operators harness;

c) ensure the saw is securely attached when it is

being sent up to the operator;

d) ensure the saw it secured to the harness

before it is disconnected from the means of ascent.

The possibility to attach the unit on the operators belt greatly reduces the risk of machine damage

during aerial work. Stop the machine when it is attached to the operator. The saw should only be attached to the recommended attachment points on the harness. These may be at mid-point (front or rear) or at the sides. Where possible attaching the saw to centre rear mid-point will keep it clear of climbing lines and support its weight centrally down the operator’s spine (Fig. 17). When moving the saw from any attachment point to another, operators should ensure it is secured in the new position before releasing it from the previous attachment point.

Using the chainsaw in the tree

An analysis of accidents with these saws during tree service operations shows the primary cause as being inappropriate one-handed use of the saw. In the vast majority of accidents, operators fail to adopt a secure work position which allows them to hold both handles of the saw. This results in an increased risk of injury due to:

- not having a firm grip on the saw if it kicks back;

- a lack of control of the saw such that it is more liable to contact climbing lines and operators body (particularly the left hand and arm)

- losing control from insecure work position resulting in contact with the saw (unexpected movement during operation of the saw)

Securing the work position for two-handed use

To allow the operator to hold the saw with both hands, they should as general rule, aim for secure work position where they are operating the saw at:

- hip level when cutting horizontal sections;

- solar plexus level when cutting vertical

sections. Where the operator is working close into vertical stems with a low lateral forces on their work position, then a good footing may be all that is needed to maintain a secure work position. However as operators move away from the stem, they will need to take steps to remove or counteract the increasing lateral forces by, for example, a re-direct of the main line via a supplementary anchor point or using an adjustable strop direct from the harness to a supplementary anchor point (Fig. 18). Gaining a good footing at the working position

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can be assisted by use of a temporary foot stirrup created from an endless sling (Fig. 19).

Starting the saw in the tree

When starting the saw in the tree, the operator

should: a) apply the chain brake before starting;

b) hold saw on either the left or right of the body

when starting:

1) on the left side hold the saw with either the

left hand on the front handle or the right hand on the rear handle and thrust the saw away

from the body while holding the pull starter cord in the other hand;

2) on the right side, hold the saw with the right

hand on either handle and thrust the saw away from the body while holding the pull starter cord in the left hand.

The chain brake should always be engaged before lowering a running saw onto its strop.

Operators should always check the saw has sufficient fuel before undertaking critical cuts.

One-hand use of the chainsaw

Operators should not use tree service chainsaws

one-handed in place of unstable work positioning or in preference to a handsaw when cutting small diameter wood at the branch tips.

Tree service chainsaws should only be used onehanded where:

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- the operator cannot gain a work position enabling two-handed use; and

- they need to support their working position

with one hand; and

- the saw is being used at full stretch, at right

angles to and out of line with the operator’s body (Fig. 20).

Operators should never:

- cut with the kickback zone at the tip of the chainsaw guide bar

- ‘hold and cut’ sections

- attempt to catch falling sections.

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Freeing a trapped saw

If the saw should become trapped during cutting,

operators should:

- switch off the saw and attach it securely to the tree inboard (i.e. towards the trunk side) of the

cut or to a separate tool line;

- pull the saw from the kerf whilst lifting the branch as necessary;

- if necessary, use a handsaw or second chain

saw to release the trapped saw by cutting a

minimum of 30 cm away from the trapped saw. Whether a handsaw or a chainsaw is used to free a stuck saw, the release cuts should always be outboard (toward the tips of the branch), in order to prevent the saw being taken with the section and further complicating the situation.

Basic Safety Precautions

· Read this manual carefully until you completely understand and can follow all safety rules, precautions, and operating instructions before attempting to use the unit.

· Restrict the use of your saw to adult users who understand and can follow safety rules, precautions, and operating instructions found in this manual. Minors should never be allowed to use a chainsaw.

· Do not handle or operate a chain saw when you are fatigued, ill, or upset, or if you have taken alcohol, drugs, or medication. You must be in good physical condition and mentally alert. Chain saw work is strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a chain saw. Be more cautious before rest periods and towards the end of your shift.

· Keep children, bystanders, and animals a minimum of 35 feet (10 meters) away from the work area. Do not allow other people or animals to be near the chain saw when starting or operating the chain saw.

· Major cases of chainsaw accidents happen when the chain hits the operator. While working with the chainsaw, always use safety protective approved clothing. The use of protective clothing does not eliminate injury risks, but reduces the injury effects in case of accident. Consult your trusted supplier to choose equipment in compliance with legislation. The clothing must be proper and not an obstacle. Wear adherent anti-cut clothing. Anti-cut jackets, dungarees and leggings are ideal. Do not wear clothes, scarves, ties or bracelets that may get stuck in wood or twigs. Tie up and protect long hair (example with foulards, cap, helmets, etc.).

Safety shoes or boots having skid-proof sole and anti-piercing insert. Wear protective helmet in places where there can be falling objects. Wear protective goggles or face screens! Use protections against

noises: for example noise reduction ear guards or earplugs. The use of protections for

the ear requests much more attention and caution, because the perception of danger audio signals (screaming, alarms, etc.) is limited. Wear anti-cut gloves.

· Only loan your saw to expert users who are completely familiar with saw operation and correct use. Give other users the manual with operating instructions, which they have to read before using the saw.

· Check the chain saw each day to ensure that each device, whether for safety or otherwise, is functional.

· Never use a damaged, modified, or improperly repaired or assembled chain saw. Do not remove, damage or deactivate any of the safety devices. Only use bars of the length indicated in the table (page 12). Always replace bar, chain, hand guard, or chain brake immediately if it becomes damaged, broken or is otherwise removed.

· Carefully plan your sawing operation in advance. Do not start cutting until you have a clear work area, secure footing, and, if you are felling trees, a planned retreat path.

· All saw service, other than the operations shown in the present manual, have to be performed by competent personnel.

· The chain saw must only be used for cutting wood. It is unadvisable to cut other types of material.

· It is unadvisable to hitch tools or applications to the P.t.o. that are not specified by the manufacturer.

Fuel Handling

WARNING: Gasoline is an extremely flammable fuel. Use extreme caution

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when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the chainsaw.

· To reduce the risk of fire and burn injury, handle fuel with care. It is highly flammable.

· Mix and store fuel in a container approved for gasoline.

· Mix fuel outdoors where there are no sparks or flames.

· Select bare ground, stop engine, and allow to cool before refueling.

· Loosen fuel cap slowly to release pressure and

to keep fuel from escaping around the cap.

· Tighten fuel cap securely after refueling. Unit vibration can cause an improperly tightened fuel cap to loosen or come off and spill quantities of fuel.

· Wipe spilled fuel from the unit. Move 10 feet (3 m) away from refueling site before starting engine.

· Never attempt to burn off spilled fuel under any circumstances.

· Do not smoke while handling fuel or while operating the saw.

· Store fuel in a cool, dry, well ventilated place.

· Never place the saw in a combustible area such as dry leaves, straw, paper, etc.

· Store the unit and fuel in an area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.

· Never take the cap off the tank when the engine is running.

· Never use fuel for cleaning operations.

· Take care not to get fuel on your clothing.

· Don’t refuel when you are in a tree; refuel only on a secure ground or on a platform.

Operation and Safety

Warning: Always hold the chain saw with both hands when the engine is running.

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Use a firm grip with thumbs and fingers encircling the chain saw handles.

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

· Always carry the chain saw with the engine stopped and chain brake engaged, the guide bar and saw chain to the rear, and the muffler away from your body. When transporting your chain saw, use the appropriate guide bar scabbard (Fig. 29). 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.

· Apply chain brake prior to any repositioning of the operator in the cutting area.

· Do not operate a chain saw with one hand! Serious injury to the operator, helpers, bystanders, or any combination of these persons may result from one-handed operation. A chain saw is intended for two-

handed use.

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· Before you start the engine, make sure the saw chain is not contacting any object. Never try to

start the saw when the guide bar is in a cut.

· Shut off the engine before setting down the saw. Do not leave the engine running

unattended.

· As an additional safety precaution, apply the chain brake prior to setting down the saw.

· Only use the chain saw in well-ventilated places, do not operate the chain saw in

explosive or flammable atmospheres or in closed environments. Beware of carbon monoxide poisoning.

· Do not operate saw from a ladder. Always cut in a safe position.

· Do not put pressure on the saw at the end of the cut. Applying pressure can cause you to lose control when the cut is completed.

· Do not cut near electric cables.

· Keep the handles dry, clean, and free of oil or

fuel mixture.

· When the chain saw is running, grip the front handle firmly with your left hand and the back

handle with your right hand.

· When cutting a limb that is under tension, be

alert for springback so you will not be struck when the tension in the wood fibre is released.

· Take great care when cutting small branches or

shrubs which can block the chain, be thrown back towards you or cause you to lose your

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balance.

· Never cut with the chain saw above shoulder height.

· Never start up the chain saw without the chain cover fitted.

Precautions Against Kickback

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WARNING: Avoid kickback which can result in serious injury. Kickback is the

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backward, upward or sudden forward motion of the guide bar occurring when the saw chain near the upper tip of the guide bar contacts any object such as a log or branch, or when the wood closes in and pinches the saw chain in the cut. Contacting a foreign object in the wood can also result in loss of chain saw control.

· Rotational Kickback can occur when the moving chain contacts an object at the upper tip of the guide bar. This contact can cause the chain to dig into the object, which stops the

chain for an instant. The result is an extremely fast, reverse reaction which kicks the guide bar up and back toward the operator (Fig. 15).

· Pinch-Kickback can occur when the wood

closes in and pinches the moving saw chain in the cut along the top of the guide bar and the saw chain is suddenly stopped. This sudden stopping of the chain results in a reversal of the chain force used to cut wood and causes the saw to move in the opposite direction of the chain rotation. The saw is driven straight back toward the operator.

· Pull-In can occur when the moving chain

contacts a foreign object in the wood in the cut along the bottom of the guide bar and the saw chain is suddenly stopped. This sudden stopping pulls the saw forward and away from the operator and could easily cause the operator to lose control of the saw.

Avoid Pinch-Kickback:

· Be extremely aware of situations or obstructions that can cause material to pinch the top of or otherwise stop the chain.

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

· Do not twist the saw as the bar is withdrawn from an undercut when bucking.

Avoid Pull-In:

· Always begin cutting with the engine at full speed and the saw housing against wood.

· Use wedges made of plastic or wood. Never use metal to hold the cut open.

Reduce the Risk of Kickback

Recognize that kickback can happen. With a basic understanding of kickback,

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you can reduce the element of surprise which contributes to accidents.

· Never let the moving chain contact any object at the tip of the guide bar.

· Keep the working area free from obstructions such as other trees, branches, rocks, fences, stumps, etc. Eliminate or avoid any obstruction that your saw chain could hit while you are cutting through a particular log or branch.

· Keep your saw chain sharp and properly tensioned. A loose or dull chain can increase the chance of kickback occurring. Follow manufacturer’s chain sharpening and maintenance instructions. Check tension at

regular intervals with the engine stopped, never with the engine running. Make sure the chain brake nuts are securely tightened after tensioning the chain.

· Begin and continue cutting at full speed. If the chain is moving at a slower speed, there is greater chance of kickback

occurring.

· Cut one log at a time.

· Use extreme caution when re-entering a previous cut.

· Do not attempt cuts starting with the tip of the bar (plunge cuts).

· Watch for shifting logs or other forces that could close a cut and pinch or fall into chain.

· Use the Reduced-Kickback Guide Bar and LowKickback Chain specified for your saw.

Maintain Control

· Keep a good, firm grip on the saw with both hands when the

· engine is running and don’t let go. A firm grip will help you reduce kickback and maintain control of the saw. Keep the fingers of your left hand encircling and your left thumb under the front handlebar. Keep your right hand completely around the rear handle whether you are right handed or left handed. Keep your left arm straight with the elbow locked.

· Position your left hand on the front handlebar so it is in a straight line with your right hand on the rear handle when making bucking cuts. Never reverse right and left hand positions for any type of cutting.

· Stand with your weight evenly balanced on both feet.

· Stand slightly to the left side of the saw to keep your body from being in a direct line with the cutting chain.

· Do not overreach. You could be drawn or thrown off balance and lose control of the saw.

· Do not cut above shoulder height. It is difficult to maintain control of saw above shoulder height.

Kickback Safety Features

WARNING: The following features are included on your saw to help reduce the

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hazard of kickback; however, such features will not totally eliminate this dangerous reaction. As a chain saw user, do not rely only on safety devices. You must follow all safety

precautions, instructions, and maintenance in this manual to help avoid kickback and other forces which can result in serious injury.

· Reduced-Kickback Guide Bar, designed with a small radius tip which reduces the size of the kickback danger zone on the bar tip. A Reduced-Kickback Guide Bar has been demonstrated to significantly reduce the number and seriousness of kick-backs when tested in accordance with safety requirements for gasoline powered chain saws as set by ANSI B175.1 - 2000.

· Low-Kickback Chain, designed with a contoured depth gauge and guard link that deflect kickback force and allow wood to gradually ride into the cutter. Low-Kickback Chain has met kickback performance requirements when tested on a representative sample of chain saws below 3.8 cubic inch displacement specified in ANSI B175.1 - 2000.

· Front Hand Guard, designed to reduce the chance of your hand contacting the chain as your hand slips off the front handlebar.

Chain Brake

Chain brakes are designed to rapidly stop the chain from rotating. When the chain brake lever / hand guard is pushed toward the bar, the chain should stop immediately. A chain brake does

not prevent kickback.

Chain brake should be cleaned and tested daily. Clean the chain brake per the Maintenance-Chain Brake Section and test per the Operation-Chain Brake Operation Section.

WARNING: Even with proper maintenance, the correct operation at the chain brake

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under field conditions can not be certified.

WARNING: WE DO NOT REPRESENT AND YOU SHOULD NOT ASSUME THAT THE

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CHAIN BRAKE WILL PROTECT YOU IN THE EVENT OF A KICKBACK. DO NOT RELY UPON ANY OF THE DEVICES BUILT INTO YOUR SAW. YOU SHOULD USE THE SAW PROPERLY AND CAREFULLY TO AVOID KICKBACK.

Reduced-Kickback Guide Bar and LowKickback Chain

Reduced-kickback guide bars and low-kickback saw chains reduce the chance and magnitude of

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kickback and are recommended. Your saw has a low kickback chain and bar as original

equipment. Repairs on a chain brake should be made by an authorized servicing dealer. Take your unit to the place of

purchase if purchased from a servicing dealer, or to the nearest authorized service dealer.

WARNING: Computed kickback angle (CKA) listed on your saw and listed in

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the CKA table below represents angle of kickback your bar and chain combinations will have when tested in accordance with CSA

(Canadian Standards Association) and ANSI standards. When purchasing replacement bar

and chain, considerations should be given to the lower CKA values. Lower CKA values represent safer angles to the user, higher

values indicate more angle and higher kick energies. Computed angles represented

Recommended bar and chain combination

3/8” x .050” Low Prole Chain

LENGTH EFCO BAR P/N OREGON BAR P/N CHAIN TYPE

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12” EUSA50018 120SDEA041 91PX 91PX045X 27° 14” EUSA50000 140SDEA041 91PX 91PX052X 30° 16” EUSA50001 160SDEA041 91PX 91PX057X 35°

indicate total energy and angle associated without activation of the chain brake during kickback. Activated angle represents chain stopping time relative to activation angle of chain break and resulting kick angle of saw. In all cases lower CKA values represent a safer operating environment for the user. The following guide bar and chain combinations meet kickback requirements of CSA Standards Z62.1, Z62.3, & ANSI B175.1 when used on saws listed in this manual. Use of bar and chain combinations other than those listed is not recommended and may not meet the CKA requirements per standard.

WARNING: Do not mount a bow guide on any Efco chainsaw. The risk of kickback

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is increased with a bow guide because of the increased kickback contact area.

EFCO CHAIN

P/N (SAME AS

OREGON)

CKA WITHOUT

CHAIN BRAKE

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WARNING: The computer derived angles of par. 5.11 of ANSI B 175.1 – 2000 may

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bear no relationship to actual kickback bar rotation angles that may occur in real life cutting situations. In addition, features designed to reduce kickback injuries may lose some of their effectiveness when they are no longer in their original condition, especially if they have been improperly maintained. Compliance with par. 5.11 of ANSI B 175.1 – 2000 does not automatically mean that in a real life kickback the bar and chain will rotate at most 45°.

Precautions to Reduce Vibration Risk

· The chain saw is provided with anti-vibration (AV) system; never alter or modify it.

· Wear gloves and keep your hands warm.

· Keep the saw chain sharp and the saw,

including the AV system, well maintained. A dull chain will increase cutting time, and pressing a dull chain through wood will increase the vibrations transmitted to your hands.

· Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressures, take frequent breaks. All the above mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should monitor closely the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.

Maintenance Precaution

WARNING: Never operate a chain saw that is damaged, improperly adjusted, or is

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not completely and securely assembled.

· Be sure that the saw chain stops moving when the throttle control trigger is released. If the saw chain moves at idle speed, the carburetor may need adjusting, see Operation-Carburetor Adjusting Section. If the saw chain still moves at idle speed after adjustment has been made, contact a Servicing Dealer for adjustment and discontinue use until the repair is made.

WARNING: All chain saw service, other than items in the Operator's Manual

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maintenance instructions, have to be performed by competent chain saw service personnel. (If improper tools are used to remove the flywheel or clutch, or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur which could subsequently cause the flywheel to burst and serious injury could result.)

· Never modify your saw in any way.

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

WARNING: Use only accessories and replacement parts recommended.

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· Never touch the chain or attempt to service the saw while the engine is running.

· Never use fuel for cleaning operations.

· Keep the chain saw in a dry place, off the ground with the chain guard on and the tanks empty.

· If your chain saw is no longer usable, dispose of it properly without damaging the environment by handing it in to your local Dealer who will arrange for its correct disposal.

· Replace immediately any safety device when damaged or broken.

WARNING: The muffler and other parts of the engine (e.g. fins of the cylinder,

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spark plug) become hot during operation and remain hot for a while after stopping the engine. To reduce risk of burns do not touch the muffler and other parts while they are hot.

4. ASSEMBLING THE BAR AND CHAIN

WARNING: Check the chain tension frequently when operating the chain

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saw. Never touch or adjust the chain while the engine is running. The saw chain is very sharp, always wear protective gloves when performing maintenance to the chain.

1 Ensure that the chain brake is not set by

pulling the chain brake lever / hand guard towards the front handle as shown in Fig. 3. Refer to Safety-Chain Brake and OperationChain Brake Sections for additional information.

2. Remove the bar nut (A, Fig. 4) and the clutch cover (B).

3. Remove and discard the plastic shipping

spacer (C, Fig. 5) that has been installed on the bar studs in place of the bar for shipping purposes.

4. Adjust the chain tensioning pin (D) fully towards the brake band by turning the chain tensioning screw (L) counterclockwise as shown in inset (Fig. 5).

5. The guide bar (F) contains a bar stud slot that fits over the bar studs (N). The guide bar also contains two chain tensioning pin holes (G) and two lubrication holes, one per side. The bar is reversible and either tensioning pin hole may be utilized with the chain tensioning pin.

6. Place the guide bar (F) onto the bar studs (H) as shown in Fig. 5.

7. Position the guide bar (F) tip through the chain (H) loop as shown in Fig. 6. The cutters on the top of the guide bar should face toward the bar nose, in the direction of the chain rotation. See insert (M) in Fig. 8.

8. Fit the chain (H) over the rim sprocket (E) and into bar groove.

CAUTION: Severe damage can occur to the rim sprocket, clutch drum, guide bar and

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chain, if the chain is not correctly seated into the rim sprocket.

9. Replace the clutch cover (B). Turn the chain tensioning screw (L) clockwise (as shown in Fig. 7) until the chain tensioning pin (D) fits into the chain tensioning pin hole (G). Install the bar nut (A). Tighten the bar nut finger tight only. The bar must be free to move for tension adjustment.

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CAUTION: Failure to ensure that the chain tensioning pin is in the chain tensioning

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pin hole will result in severe damage to the chain saw during reassembly of the clutch cover.

NOTE: If the clutch cover does not slide on

freely, check that the chain brake is not engaged. To disengage chain brake with clutch cover removed, grasp clutch cover as

shown in Fig. 3 and pull back on chain brake lever / hand guard.

10. Remove all slack from chain by turning the

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chain tensioning screw (L) clockwise, assuring that the chain seats into the bar groove during tensioning.

11. Lift the tip of the guide bar up to check for sag, see Fig. 10. Release the tip of the guide bar, and turn the chain tensioning screw (L) 1/2 turn clockwise. Repeat this process until sag does not exist.

12. Hold the tip of the guide bar up and tighten the bar nuts

securely as shown in Fig. 9.

13. Chain is correctly tensioned when there is no slack on the underside of the guide bar, the chain is snug, but it can be

turned by hand without binding, see Fig. 10.

Ensure that the chain brake is not set.

NOTE: If chain is too tight, it will not rotate. Loosen bar nuts slightly and turn adjusting screw 1/4 turn counterclockwise. Lift the tip of the guide bar up and retighten bar nuts.

WARNING: Check the chain tension frequently when operating the chain



saw. Never touch or adjust the chain while the motor is running. The saw chain is very sharp, always wear protective gloves when performing maintenance to the chain.

WARNING: The replacement chain must have the same or lower kickback



characteristics as that originally supplied.

WARNING: If the saw is operated with a loose chain, the chain could jump off the

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guide bar and result in serious injury.

WARNING: Never start the saw with the sprocket cover loose.

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CHAIN TENSION

WARNING: Never touch or adjust the chain while the motor is running. The saw

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chain is very sharp, always wear protective gloves when performing maintenance to the chain.

1. Stop the engine before setting the chain tension. Loosen the guide bar nuts slightly,

turn the chain tensioning screw clockwise to tension the chain. Refer to AssemblyAssembling the Bar and Chain Section. Retighten guide bar nuts. A cold chain is correctly tensioned when there is no slack on the underside of the guide bar, the chain is snug, but it can be turned by hand without binding. For warm chain, see Item 3.

2. Chain must be retensioned whenever the flats on the drive link tangs hang out of the bar groove.

3. During normal saw operation, the temperature of the chain will increase. The drive link tangs of a correctly tensioned warm chain will hang approximately .050” (1.25 mm) out of the bar groove. To help determine the correct warm chain tension, the tip of the combination wrench can be used as a guide.

CAUTION: Chain tensioned while warm, may be too tight upon cooling. Check the

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"cold tension" before next use.

CAUTION: A new chain has to be retensioned more often than one that

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has been in use for some time.

Breaking-in the Chain New chains will stretch and must be tightened frequently.

Lift the chain out of the bar groove and lubricate the bar groove with additional oil. Place the chain saw on a piece of cardboard or scrap plywood. Start the chain saw (refer to the OperationStarting Engine Section) and allow it to run at moderate speed for approximately one (1) minute. Stop the engine. Check that the oil pump is working properly. The cardboard should have excess oil from the chain rotation if the oil pump is working properly. Adjust the chain

tension (refer to Operation-Chain Tension Section). Start the saw again and make a few cuts in a log to heat up the chain. Stop the engine and re-adjust chain again. Repeat this process until the chain retains proper warm tension adjustment in Operation-Chain Tensioning Section. Never touch the ground with the

chain.

Bucking Spike

WARNING: Your chain saw is fitted with a bucking spike. The bucking spike is very

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sharp and can cause injury. Be extremely careful when working near the bucking spike.

5. STARTING

FUELING

This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle oil. Pre-mix unleaded gasoline and 2-cycle engine oil in a clean container approved for gasoline. RECOMMENDED FUEL: THIS ENGINE IS CERTIFIED TO OPERATE ON UNLEADED GASOLINE INTENDED FOR AUTOMOTIVE USE WITH AN OCTANE RATING OF 89 ([R + M] / 2) OR HIGHER. Mix 2-cycle engine oil with gasoline according to the instructions on the package. We strongly recommend the use of 2% (1:50) Efco two cycle engine oil, which is specifically formulated for all air-cooled two-stroke engines. The correct oil / fuel proportions shown in the table are suitable when using the Efco PROSINT 2 and EUROSINT 2 or an equivalent high-quality engine oil (JASO specification FD or ISO

specification L-EGD).

GASOLINE OIL

2% - 50:1

ℓ ℓ

5 10 15 20 25

CAUTION: DO NOT USE AUTOMOTIVE OIL

OR 2-CYCLE OUTBOARD OIL.

0,02 0,10 0,20 0,30 0,40 0,50

(cm3)

(20) (100) (200) (300) (400) (500)

CAUTION:

- Match your fuel purchases to your consumption; don’t buy more than you will use in one or two months;

- Store gasoline in a tightly-closed container in a cool, dry place.

CAUTION - For the mixture, never use a fuel with an ethanol percentage higher

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than 10%; gasohol (mixture of gasoline and ethanol) up to 10% ethanol or E10 fuel are acceptable.

When using an Oxygenated Gasoline a good practice of Fuel Management is necessary. Gasoline Oxygenated with alcohol readily takes/ up water when it is present; the water may be condensed out of humid air or be a contaminant in the fuel system, including tank. The use of Oxygenated Gasoline may cause the occurrence of vapor-lock easier.

NOTE - Prepare only the quantity of mixture required for immediate use; do not leave fuel in the tank or a container for a long time. Were commend the use of the additive Emak ADDITIX 2000 code 001000972 if the mixture is to be stored for 12 months.

Alkylate gasoline

CAUTIONS – Alkylate fuels have different density than normal fuel. Therefore

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engines, set with normal fuel, need different H jet regulation to avoid critical issues. For this operation it’s necessary turned at a Licensed Service Dealer.

FILLING THE TANK

WARNING: Follow safety instruction for fuel handling. Always shut off engine

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before fuelling. Never add fuel to a machine with a running or hot engine. Move at least 3 m from refuelling site before starting engine. DO NOT SMOKE!

1. Clean surface around fuel cap to prevent contamination.

2. Loosen fuel cap slowly.

3. Carefully pour fuel mixture into the tank. Avoid spillage.

4. Prior to replacing the fuel cap, clean and

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inspect the gasket.

5. Immediately replace fuel cap and hand

tighten. Wipe up any fuel spillage.

NOTE: It is normal for smoke to be emitted from a new engine during and after first use.

WARNING: Check for fuel leaks, if any are found, correct before use. Contact a

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Servicing Dealer if necessary.

Chain Oil System

The bar and chain require continuous lubrication.

Lubrication is provided by the automatic oiler system when the oil tank is kept filled. Lack of oil

will quickly ruin the bar and chain. Too little oil will cause overheating shown by smoke coming

from the chain and/or discoloration of the bar. In freezing weather oil will thicken, making it

necessary to thin bar and chain oil with a small amount (5 to 10%) of Diesel Fuel or kerosene. Bar and chain oil must be free flowing for the oil

system to pump enough oil for adequate lubrication.

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CAUTION: Never use waste oil. Always use biodegradable lubrificant that is specific

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for bar and chain and that is better for the environment and chainsaw’s parts.

CAUTION: Do not use dirty, used or otherwise contaminated oils. Damage

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may occur to the oil pump, bar, or chain.

WARNING: Do not use waste oil! Medical studies have shown that renewed contact

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with waste oil can cause skin cancer.

1. Fill the oil tank every time engine is fueled. Chain saw should use approximately one tank of oil per tank of fuel.

2. The automatic oil pump is a positive displacement pump operated through gears driven off the clutch drum assembly.

The pump will not oil at idle speeds.

Preparation for Cutting Proper Grip on Handles.

Refer to Safety Section for appropriate Safety Equipment.

1. Wear non-slip gloves for maximum grip and protection.

WARNING: Hold the saw firmly with both hands. Always keep your LEFT HAND on

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the front handlebar and your RIGHT HAND on the rear (throttle) handle, so that your body is to the left of the chain line. Never use a crosshanded grip, or any stance which would place your body or arm across the chain line. Lefthanders should follow these instructions too.

2. Maintain a proper grip on the saw whenever the engine is running. The fingers should encircle the handlebar and the thumb is wrapped under the handlebar. This grip is least likely to be broken (by a kickback or other sudden reaction of the saw). Any grip in which the thumb and fingers are on the same side of the handle, is dangerous because a slight kick of the saw can cause loss of control.

WARNING:

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Proper Cutting Stance

- Weight should be balanced on both feet - feet on solid ground.

- Keep arm with elbow locked in a "straight arm" position to withstand any kickback force.

- Your body should always be to the left of the chain line.

- Thumb on underside of handlebar.

Basic Cutting Procedure

Practice cutting a few small logs using the following technique to get the "feel" of using your saw before you begin a major sawing operation.

1. Take the proper stance in front of the wood with the saw idling.

2. Accelerate the engine to full throttle just before entering the cut by squeezing the throttle trigger.

3. Begin cutting with the saw against the log.

4. Keep the engine at full throttle the entire time you are cutting.

5. Allow the chain to cut for you; exert only light downward pressure. If you force the cut, damage to the bar, chain, or engine can result.

6. Release the throttle trigger as soon as the cut is completed, allowing the engine to idle. If

you run the saw at full throttle without a cutting load, unnecessary wear or damage can occur to the chain, bar, and engine.

7. Do not put pressure on the saw at the end of the cut.

Work Area Precautions

WARNING: Cut only wood or materials made from wood. Do not cut metal,

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plastics, masonry, or non-wood building materials.

· Never allow children to operate your saw. Only allow others to use this chainsaw who have read this Operator's Manual or received adequate instructions for the safe and proper use of this chain saw.

· Keep everyone - helpers, bystanders, children, and animals a safe distance from the cutting area. During felling operations, the safe distance should be a least twice the height of the largest trees in the felling area. During bucking operations, keep a minimum distance of 35 feet (10 m) between workers.

· Always cut with both feet on solid ground to prevent being pulled off balance.

· Do not cut above chest height, as a saw held higher is difficult to control against kickback forces.

· Do not fell trees near electrical wires or buildings. Leave this operation for professionals.

· Cut only when visibility and light are adequate for you to see clearly.

· Do not cut from a ladder, this is extremely dangerous. Leave this operation for

professionals.

· Stop the saw if the chain strikes a foreign object. Inspect the saw and repair parts as necessary.

· Keep the chain out of dirt and sand. Even a small amount of dirt will quickly dull a chain and increase the possibility of kickback.

· Stop the engine before setting the saw down.

· Be particularly cautious and alert while

wearing hearing protection because such equipment may restrict your ability to hear sounds indicating danger (calls, signals, warnings, etc).

· Be extremely cautious when working on slopes or uneven ground.

· When a chain saw is being used, a fire extinguisher should be available.

WARNING – Never start the saw engine

without the bar, chain and clutch cover

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(chain brake) assembled - or else the clutch can come loose and cause personal injuries.

STARTING THE ENGINE

WARNING: Keep body to the left of the chain line. Never straddle the saw or

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chain, or lean over past the chain line. The chain brake must be engaged when starting the saw.

· Place the chain saw on level ground and ensure that no objects or obstructions are in immediate vicinity which could come in contact with the bar and chain. Hold the front handle firmly with the left hand and put your right foot onto the base of the rear handle, see Fig. 14.

· Set the chain brake by pushing the chain brake lever / hand guard forward (towards the bar), to the Brake Position as shown in Fig. 12. Refer to Safety-Chain Brake and Operation-Chain Brake Sections for additional information.

· Slowly push the purge bulb 6 to 8 times (14, Fig. 2).

· Pull the choke lever (D) to the fully extended position (

· Pull the starter rope until the first firing of the engine is heard (no more than five (5) pulls). A

new unit may require additional pulls.

· Push the choke lever (E) completely in the OPEN position, as shown in Fig. 13.

· Pull the starter rope until the engine starts.

· Immediately after the engine has started, depress the throttle trigger lockout (3, Fig. 2), quickly squeeze and release the throttle trigger (2). Place chain brake lever / hand guard into the run position as shown in Fig. 3. Refer to Safety-Chain Brake and Operation-Chain Brake Sections for additional information.

· When pulling the starter rope, do not use the full extent of the rope as this can cause the

), as shown in Fig. 13.

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rope to break. Do not let starter rope snap back. Hold the handle and let the rope rewind

slowly.

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WARNING: Do not cut material with the choke/fast idle lever at the FULL CHOKE

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position. Do not operate your chainsaw with

the starting throttle lock engaged. Cutting with the starting throttle lock engaged does not permit the operator proper control of the saw or chain speed.

NOTE - STARTING WARM ENGINE: Follow above starting instructions, but do not use the Full Choke position for start up again. To set fast idle for warm engine starting, pull choke out completely and push back in to the

original Run Position.

WARNING: Weather conditions and altitude may affect carburetion. Do not

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allow bystanders close to the chain saw while adjusting the carburetor.

WARNING: Never attempt to start the chainsaw when the guide bar is in a cut

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or kerf.

Breaking-in the Engine

The engine reaches the maximum power after 5-8 hours of activity. During this period of breaking-in do not make the machine function idly at full throttle, to avoid excessive functioning stress.

CAUTION! – During the braking-in period do not vary the carburetion to obtain a

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presumed power increment; the engine can be damaged.

Difficult Starting (or starting a flooded engine)

The engine may be flooded with too much fuel if it has not started after 10 pulls. Flooded engines can be cleared of excess fuel by following the warm engine starting procedure listed above. Starting could require pulling the starter rope handle many times depending on how badly the unit is flooded. If engine fails to start refer to the TROUBLESHOOTING TABLE (page 28).

Engine is Flooded

If you did not move the choke lever to warm start, quickly enough after the engine began to fire, the combustion chamber is flooded.

· Pry off the spark plug boot.

· Unscrew and dry off the spark plug.

· Open the throttle wide.

· Pull the starter rope several times to clear the combustion chamber.

· Refit the spark plug and connect the spark plug boot, press it down firmly.

· Set the choke lever to warm start (OPEN) – even if engine is cold.

· Now start the engine.

6. STOPPING THE ENGINE

Release the throttle lever (2, Fig. 2) and let the engine return to idle. Turn off the engine, pushing the STOP button (10).

Do not put the chain saw on the ground

when the chain is still moving.

CAUTION: The chain contracts as it cools down. If it is not slackened, it could

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damage the crankshaft and bearings.

Pre-operation checking

WARNING: THE SAW CHAIN SHOULD NEVER TURN AT IDLE. Turn the idle speed



screw “T” counterclockwise to reduce the idle RPM and stop the chain, or contact a Servicing Dealer for adjustment and discontinue use until the repair is made. Serious personal injury may result from the saw chain turning at idle.

7. USE

Chain Brake Operation Refer to Safety-Chain Brake Section before

use.

The chain brake operating condition should be checked prior to each use as follows:

1. Start the engine and grasp front and rear handles securely with both hands.

2. Pull the throttle trigger to bring the chain saw up to full speed. Using the back of your left hand, engage the chain brake by pushing the

chain brake lever / hand guard toward the bar while the chain is rotating rapidly.

3. The chain brake should engage and stop the chain immediately, if not, take the saw to a Servicing Dealer for repair and discontinue use until the repair is made.

4. Reset the chain brake back into the run position by grasping the guide bar side (right side from operator's position) of the chain brake lever / hand guard and pull toward the front handle until an audible click is heard. See Fig. 3.

WARNING: If chain brake does not stop the chain immediately, take the saw to a

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Servicing Dealer for repair prior to use.

WARNING: An improperly maintained chain brake may increase the time needed



to stop the chain after activation, or may not activate at all.

WARNING: This chainsaw equipped with a top handle is designed specifically



for tree surgery and maintenance. Due to the special handle design (closely spaced handles), there is an increased risk in its use. For this reason this special chainsaw should be used only for work in a tree by persons trained in special cutting and working techniques. This type of chainsaw cannot be used for felling operations; for this reason, this manual does not contain instructions for felling. For bucking and other operations on ground the use of a normal forest chainsaw is highly recommended.

WARNING: During bucking operations always stand on the uphill side so that the



cut-off section of the log can not roll over you.

WARNING: If saw becomes pinched or hung in a log, don’t try to force it out. You



can lose control of the saw resulting in injury and/or damage to the saw. Stop the saw, drive a wedge of plastic or wood into the cut until the saw can be removed easily. Restart the saw and carefully reenter the cut. Do not attempt to restart your saw when it is pinched or hung in a log.

WARNING: Do not stand on the log being cut. Any portion can roll causing loss of



footing and control. Do not cut in an area where logs, limbs, and roots are tangled. Drag the logs into a clear area before cutting by pulling out exposed and cleared logs first.

Bucking with a Wedge

If the wood diameter is large enough for you to insert a soft bucking wedge without touching the chain, you should use the wedge to hold the cut open to prevent pinching.

Logs Under Stress

Make the first bucking cut 1/3 of the way through the log and finish with a 2/3 cut on the opposite side. As the log is being cut, it will tend to bend. The saw can become pinched or hung in the log if you make the first cut deeper than 1/3 of the diameter of the log. Give special attention to logs under stress to prevent the bar and chain from pinching.

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Bucking

Bucking is the term used for cutting a fallen tree to the desired log length.

· Cut only one log at a time.

WARNING: Support small logs on a saw horse or another log while bucking. Never

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allow another person to hold the log while cutting and never hold the log with your leg or foot.

WARNING: Keep a clear cutting area. Make sure that no objects can contact the guide



bar nose and chain during cutting, this can cause kickback (Fig. 15).

Types of Cutting Used Overbucking

Begin on the top side of the log with the bottom of the saw against the log; exert light pressure downward.

Underbucking

Begin on the under side of the log with the top of the saw against the log; exert light pressure upward. During underbucking, the saw will tend to push back at you. Be prepared for this reaction and hold the saw firmly to maintain control.

WARNING: Never turn saw upside down to undercut. The saw cannot be controlled

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in this position. Always make your first cut on the compression side of the log. The

compression side of the log is where the pressure of the log’s weight is concentrated.

Limbing and Pruning

WARNING: Be alert for and guard against

kickback. Do not allow the moving chain



to contact any other branches or objects at the nose of the guide bar when limbing or

pruning. Allowing such contact can result in serious injury.

· Work slowly, keeping both hands on the saw with a firm and proper grip. Maintain secure

footing and balance.

· Keep the tree between you and the chain while

limbing. Cut from the side of the tree opposite the branch you are cutting.

· Do not cut from a ladder, this is extremely

dangerous. Leave this operation for professionals.

· Do not cut above chest height as a saw held higher is difficult to control against kickback.

· Be alert for springback. Watch out for branches

that are bent or under pressure. Avoid being struck by the branch or the saw when the

tension in the wood fibers is released.

· Keep a clear work area. Frequently clear branches out of the way to avoid tripping over

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them.

WARNING: Only persons especially

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trained in tree service operations are allowed to climb into a tree to limb or prune. Do not stand on ladders, platforms, a log or in any position which can cause you to lose your balance or control of the saw.

cutting techniques described in BUCKING WITHOUT A SUPPORT.

· Always use an overcut to cut small and freely hanging limbs. Undercutting could cause limbs to fall and pinch the saw.

Pruning Operation

· When pruning trees it is important not to make the flush cut next to the main limb or trunk until you have cut off the limb further out to reduce the weight. This prevents stripping the bark from the main member.

· Underbuck the branch 1/3 through for your first cut, your second cut should overbuck to drop the branch off.

· Now make your finishing cut smoothly and neatly against the main member so the bark will grow back to seal the wound.

WARNING: If the limbs to be pruned are above chest height, hire a professional to

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perform the pruning.

Springpoles

A springpole is any log, branch, rooted stump, or sapling which is bent under tension by other wood so that it springs back if the wood holding it is cut or removed. On a fallen tree, a rooted stump has a high potential of springing back to the upright position during the bucking cut to separate the log from the stump. Watch out for springpoles. They are potentially dangerous.

WARNING: Springpoles are dangerous and could strike the operator, causing

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the operator to lose control of the chain saw. This could result in severe or fatal injury to the operator.

Limbing Operation (Fig. 22)

· Always limb a tree after it is cut down. Only then can limbing be done safely and properly.

EST

· Leave the larger limbs underneath the felled tree to support the tree as you work.

· Start at the base of the felled tree and work toward the top, cutting branches and limbs. Remove small limbs with one cut.

· Keep the tree between you and the chain. Cut from the side of the tree opposite the branch you are cutting.

· Remove larger, supporting branches with the

8. MAINTENANCE

Chain Maintenance

Use only Dual Raker low-kickback chain on this saw. This fast-cutting chain will provide kickback reduction when properly maintained. For smooth and fast cutting, raker chain needs to be maintained properly. The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of your chain, consider

the following:

1. Improper filing angle of the side plate can increase the risk of a severe kickback.

2. Raker (depth gauge) clearance: Too much increases the potential for kickback; not enough decreases cutting ability.

3. If cutter teeth have hit hard objects such as nails and stones, or have been abraded by mud or sand on the wood, have

Servicing Dealer sharpen chain.

4. In rare instances drive tangs could flare resulting in chain not rotating freely. Replace chain if necessary.

NOTE: Inspect the rim sprocket for wear or damage when replacing the chain. If signs of wear or damage are present in the areas, have the rim sprocket replaced by a Servicing Dealer.

How to Sharpen the Cutters

Be careful to file all cutters to the specified angles and to the same length, as fast cutting can be obtained only when all cutters are uniform.

1. Wear gloves for protection. Tighten the chain tension enough that the chain does not wobble. Do all of your filing at the mid-point of the bar. See Operation-Chain Tension.

2. Use a 3/16" diameter round file and holder.

3. Keep the file level with the top plate of the tooth. Do not let the file dip or rock.

4. Using light but firm pressure, stroke towards the front corner of the tooth. Lift file away from the steel on each return stroke.

5 Put a few firm strokes on every tooth. File all

left hand cutters in one direction. Then move to the other side and file the right hand cutters in the opposite direction. Occasionally remove filings from the file with a wire brush.

CAUTION: Dull or improperly sharpened chain can cause excessive engine speed



during cutting which may result in severe engine damage.

WARNING: It is absolutely essential to comply with the angles and dimensions



specified below. If the saw chain is incorrectly sharpened – and in particular if the depth gauge is set too low – there is a risk of increased kickback of the chainsaw, with resulting risk of injury. Failure to replace or repair damaged chain can

cause serious injury. The saw chain is very sharp, always wear protective gloves when performing maintenance to the chain.

Top Plate Angle

File holders are marked with guide marks to align file properly to produce correct TOP PLATE ANGLE.

G) CORRECT- 30° H) LESS THAN 30° - For Cross Cutting. I) MORE THAN 30°- Feathered Edge Dulls

Quickly.

Side Plate Angle (Fig. 23) J) CORRECT- 85° - 90°

Produced automatically if correct diameter

file is used in file holder.

K) “HOOK”- “Grabs” and dulls quickly. Increases

potential of KICKBACK.

Results from using a file with diameter too

small, or file held too low.

L) BACKWARD SLOPE- Needs too much feed

pressure, causes excessive wear to bar and chain.

Results from using a file with diameter too

large, or file held too high.

Depth Gauge Clearance

1. The depth gauge should be maintained at a clearance (Fig. 23) between .025 (0.65 mm) and .024" (0.6 mm). Use a depth gauge tool for checking the depth gauge clearances.

2. Every time the chain is filed, check the depth gauge clearance.

Use a Flat File and a Depth Gauge Jointer to lower all gauges uniformly (Fig. 24). P) FLAT FILE Q) DEPTH GAUGE JOINTER

Depth gauge jointers available in .020" to

.035" (0.5 mm to 0.9 mm). After lowering each depth gauge, restore original shape by rounding the front. Be careful not to damage adjoining drive links with the edge of the file.

CAUTION: After sharpening, clean the chain thoroughly, remove filings



or grinding dust – lubricate the chain thoroughly.

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Guide Bar Maintenance

Every day of use, reverse the guide bar on the

saw to distribute the wear for maximum bar life. The bar should be cleaned every day of use and checked for wear and damage.

Feathering or burring of the bar rails is a normal process of bar wear. Such faults should be

smoothed with a file or stone as soon as they occur.

A bar with any of the following faults should

be replaced:

• Wear inside the bar rails which permits the

chain to lay over sideways.

• Bent guide bar.

• Cracked or broken rails.

• Spread rails. In addition, guide bars with a sprocket at their tip

must be lubricated periodically with a grease syringe to extend the guide bar life. Turn the guide bar and check that the lubrication

holes and chain groove are free from impurities.

WARNING - Never mount a new chainsaw

on a worn sprocket.

AIR FILTER

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WARNING: Do not clean filter in



gasoline or other flammable solvent to avoid creating a fire hazard or producing harmful evaporative emissions.

Completely loosen the air filter cover knob (A, Fig. 25) by turning counterclockwise, remove air

filter cover and check the air filters (B) each day. Clean filter with soapy water, rinse and dry thoroughly prior to installing. Reinstall the air filters into cover. Place the air filter cover onto the chain saw. Tighten the air filter cover knob securely. A used air filters can never be completely cleaned. It is advisable to replace your air filters with a new one after six month of operation.

CAUTION: Never run the engine without

the air filters, serious damage could



result. Make sure the air filters is correctly placed in the air filter cover before reassembly. Always replace damaged filters. Do not clean a filters with a brush.

FUEL FILTER - Check the fuel filter periodically.

Replace it if too dirty (Fig. 26).

OIL PUMP (automatic/adjustable) - Flow adjustment is pre-set by the manufacturer. Oil flow can be adjusted by the operator according to specific requirements by means of the special adjusting screw (Fig. 30). Oil flow occurs only when the chain is moving.

WARNING - Never use scavenge oil.

STARTING UNIT - Use a brush or compressed

air to keep the cooling louvers of the starter assembly free and clean.

WARNING: The coil spring is under tension



and could fly apart causing serious

injuries. Never try to disassembly or modify it.

ENGINE - Clean the cylinder & flywheel fins

with compressed air or a brush periodically. Dangerous overheating of engine may occur due to impurities on the cylinder.

WARNING: Never run the saw without all

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the parts, including the drivecase cover and starting housing, securely in place. Because parts can fracture and pose a danger of thrown objects, leave repairs to the flywheel and clutch to trained Servicing Dealers.

SPARK PLUG - Clean the spark plug and check

the electrode gap periodically (Fig. 27). Use NGK CMR7A or of other brand with the same thermal grade.

WARNING: Never test the ignition system

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with ignition wire connector removed from spark plug or with unseated spark plug, since uncontained sparking may cause a fire. A loose connection between spark plug terminal and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.

Use only resistor type spark plugs of the approved range. Factors such as:

- too much oil in fuel mix;

- dirty air filter;

- unfavourable running conditions, e.g.

operating at part load; may result in rapid deterioration of the spark plug.

+ 60 hidden pages

Efco Power MTT 3600 Operator's Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual