McCulloch CS 50S Chainsaw Kasutusjuhend

KNOW YOUR MACHINE

READ THIS INSTRUCTION MANUAL AND SAFETY RULES BEFORE OPERATING YOUR CHAIN SAW.

Compare the illustrations with your unit to familiarize yourself with the location of the various controls and

adjustments. Save this manual for future reference.

12

3

4

5

12

11

10

9

8

6

7

1. Front Hand Guard/Chain Brake

2. Front Handle

3. Starter Rope

4. ON/STOP Switch

5. Choke/Fast Idle Lever

6. Chain

7. 0XIÀHU

8. Guide Bar

9. Bar & Chain Oil Cap

10. Starter Housing

11. Fuel Cap

12. Primer Bulb

3

5

9

14

13

12

10

11

1

2

4

8

76

1. Rear Handle

2. Throttle Lockout

3. Cylinder Cover

4. Air Filter Cover

5. Adjustment Screw

6. Cutters

7. Depth Gauge

8. Drive Links

9. Direction of Travel

10. Throttle Trigger

11. &KDLQ$GMXVWPHQW7RRO%DU7RRO

12. Clutch Cover

13. Bar Nuts

14. Chain Catcher

3

SAFETY

aWARNING! Always disconnect spark plug

wire and place wire where it cannot contact

spark plug to prevent accidental starting

when setting up, transporting, adjusting

or making repairs except carburettor

adjustments.

INTRODUCTION

A chainsaw is a high-speed wood-cutting tool. Special

safety precautions must be observed to reduce the

risk of accidents.

Failure to follow all safety rules and precautions can

result in serious injury.

If situations occur which are not covered in this

manual, use care and good judgment. If you need

assistance, contact your authorized service dealer or

call customer support.

PLANNING AHEAD

 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.

 Wear protective gear. Always use steel-toed safety

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safety chaps; heavy-duty, non-slip gloves; eye

protection such as non-fogging, vented goggles

or face screen; an approved safety hard hat; and

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hearing. Regular users should have hearing checked

regularly as chainsaw noise can damage hearing.

Secure hair above shoulder length.

 Keep all parts of your body away from the chain

when the engine is running.

 Keep children, bystanders, and animals a minimum

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not allow other people or animals to be near the

chainsaw when starting or operating the chainsaw.

 Do not handle or operate a chainsaw 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. Chainsaw work is

strenuous. If you have any condition that might be

aggravated by strenuous work, check with your

doctor before operating a chainsaw.

 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.

OPERATING YOUR SAW

 Do not operate a chainsaw with one hand. Serious

injury to the operator, helpers, bystanders or any

combination of these persons may result from

one-handed operation. A chainsaw is intended for

two-handed use.

 Operate the chainsaw only in a well-ventilated

outdoor area.

 Do not operate saw from a ladder or in a tree.

 Make sure the chain will not make contact with any

object while starting the engine. Never try to start the

saw when the guide bar is in a cut.

 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.

 Stop the engine before setting the saw down.

 Do not operate a chainsaw that is damaged,

improperly adjusted, or not completely and securely

assembled. Always replace bar, chain, hand guard,

or chain brake immediately if it becomes damaged,

broken or is otherwise removed.

 Exposure to vibrations through prolonged use of

petrol powered hand tools could cause blood vessel

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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

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joints, discontinue the use of this tool and seek

medical attention. An anti-vibration system does not

guarantee the avoidance of these problems. Users

who operate power tools on a continual and regular

basis must monitor closely their physical condition

and the condition of this tool.

 With the engine stopped, hand-carry the chainsaw

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bar and chain to the rear, preferably covered with a

scabbard.



MAINTAINING YOUR SAW

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service dealer with the exception of the items

listed in the maintenance section of this manual.

For example, if improper tools are used to remove

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 Make certain the saw chain stops moving when the

throttle trigger is released. For correction, refer to

Carburettor Adjustment.

 Never modify your saw in any way.

 Keep the handles dry, clean, and free of oil or fuel

mixture.

 Keep fuel and oil caps, screws, and fasteners

securely tightened.

 Use only genuine accessories and replacement

parts as recommended.

 Certain regions require by law that many internal

combustion engines are to be equipped with a spark

arresting screen. If you operate a chainsaw in a

locale where such regulations exist, you are legally

responsible for maintaining the operating condition

of these parts. Failure to do so is a violation of

the law. Refer to the MAINTENANCE section for

maintenance of the spark arresting screen.

HANDLING FUEL

 Do not smoke while handling fuel or while operating

the saw.

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where fuel is mixed or poured. There should be no

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sparks. Allow engine to cool before refueling.

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should need them.

 Mix and pour fuel in an outdoor area on bare ground;

store fuel in a cool, dry, well ventilated place; and

use an approved, marked container for all fuel

purposes. Wipe up all fuel spills before starting saw.

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before starting engine.

 Turn the engine off and let saw cool in a non-

combustible area, not on dry leaves, straw, paper,

etc. Slowly remove fuel cap and refuel unit.

 Store the unit and fuel in an area where fuel vapors

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heaters, electric motors or switches, furnaces, etc.

UNDERSTANDING KICKBACK

aWARNING! Avoid kickback which can result

in serious injury. Kickback is the 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 chainsaw

control.

ROTATIONAL KICKBACK

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 a

lightning fast, reverse reaction which kicks the guide

bar up and back toward the operator.

PINCH KICKBACK

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

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.

REDUCING THE CHANCE OF

KICKBACK

 Recognize that kickback can happen. With a basic

understanding of kickback, 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. When cutting

a branch, do not let the guide bar contact branch or

other objects around it.

 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 bar

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.

 Use wedges made of plastic or wood. Never use

metal to hold the cut open.

 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

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 Watch for shifting logs or other forces that could

close a cut and pinch or fall into chain.

 Do not twist the saw as the bar is withdrawn from an

undercut when bucking.

 Use the reduced-kickback guide bar and low-

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MAINTAINING CONTROL

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grip will help you reduce kickback and maintain

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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.

5

 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.

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maintain control of saw above shoulder height.

KICKBACK SAFETY FEATURES

aWARNING! The following features are

included on your saw to help reduce the

hazard of kickback; however, such features

will not totally eliminate this danger.

As a chainsaw 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

The reduced-kickback guide bar is designed with a

small radius tip which reduces the size of the kickback

danger zone on the bar tip.

LOW-KICKBACK CHAIN

A low-kickback chain is designed with a contoured

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force and allow wood to gradually ride into the cutter.

FRONT HAND GUARD

The front hand guard is designed to reduce the

chance of your left hand contacting the chain if your

hand slips off the front handlebar.

The distance and “in-line” position of the hands

provided by the front and rear handles work together

to give balance and resistance in controlling the

pivot of the saw back toward the operator if kickback

occurs.

CHAIN BRAKE

The chain brake is designed to stop the chain in the

event of kickback.

NOTE: We do not represent and you should not

assume that the 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.

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 master service dealer.

ASSEMBLY

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assembly.

NOTE: Chain brake must be unlocked before

clutch cover can be removed or reinstalled on the

chain saw. To unlock chain brake, pull the front

hand guard back toward the front handle as far as

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ATTACHING THE BUMPER SPIKE

(If not already attached)

The bumper spike may be used as a pivot when

making a cut.

1. Move ON/STOP switch to the STOP position.

2. Unlock chain brake.

3. Loosen and remove the chain brake nuts and the

clutch cover from the saw.

NOTE: If clutch cover can not be easily removed

from the chain saw, ensure chain brake is unlocked

by pulling the front hand guard back toward the

front handle as far as possible.

4. Attach the bumper spike with the two screws as

shown.

ATTACHING THE BAR & CHAIN

(If not already attached)

aWARNING: If received assembled, repeat

all steps to ensure your saw is properly

assembled and all fasteners are secure.

Always wear gloves when handling the

chain. The chain is sharp and can cut you

even when it is not moving!

1. Move ON/STOP switch to the STOP position.

2. Unlock chain brake.

3. Loosen and remove the bar nuts and the clutch

cover from the saw.

NOTE: If clutch cover can not be easily removed

from the chain saw, ensure chain brake is unlocked

by pulling the front hand guard back toward the

front handle as far as possible.



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5. An adjustment pin and screw is used to adjust

the tension of the chain. It is very important when

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down the screw. Locate this adjustment pin before

you begin mounting the bar onto the saw. See

following illustration.

A

B

C

6. Use the screwdriver end of the bar tool to turn

the adjustment screw counterclockwise. Turn the

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the way to the right side of the adjustment travel

pocket as shown in view above. This should allow

the pin to be near the correct position.

7. Slide guide bar on bar bolts until guide bar stops

against clutch drum sprocket.

8. Carefully remove the chain from the package. Hold

chain with the drive links as shown.

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the drive links in the clutch drum sprocket.

10. Fit bottom of drive links between the teeth in the

sprocket in the nose of the guide bar.

11. Fit chain drive links into bar groove.

12. Pull guide bar forward until chain is snug in guide

bar groove. Ensure all drive links are in the bar

groove.

13. Now, install clutch cover making sure the

adjustment pin is positioned in the lower bar pin

hole. Remember this pin moves the bar forward

and backward as the screw is turned.

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chain is tensioned, you will need to tighten bar

nuts.

CHAIN TENSION

(Including units with chain already installed)

aWARNING: Wear protective gloves when

handling chain. The chain is sharp and can

cut you even when it is not moving.

NOTE: When adjusting chain tension, make sure

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tension the chain when the bar nuts are tight can

cause damage.

CHECKING THE TENSION

Use the screwdriver end of the chain adjustment tool

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does not rotate, it is too tight. If the chain is too loose,

it will sag below the bar.

7

ADJUSTING THE TENSION

Chain tension is very important. Chains stretch during

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you use your saw. Always check chain tension each

time before you start the chain saw.

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the clutch cover.

2. Turn adjustment screw clockwise until chain solidly

contacts bottom of guide bar rail.

3. Using bar tool, roll chain around guide bar to

ensure all links are in bar groove.

4. Lift up tip of guide bar to check for sag. Release tip

of guide bar, then turn adjustment screw 1/4 turn

clockwise. Repeat until sag does not exist.

5. While lifting tip of guide bar, tighten bar nuts

securely with the bar tool.

6. Use the screwdriver end of the bar tool to move

chain around guide bar.

7. If chain does not rotate, it is too tight. Slightly

loosen bar nuts and loosen chain by turning the

adjustment screw 1/4 turn counterclockwise.

Retighten bar nuts.

8. If chain is too loose, it will sag below the guide bar.

DO NOT operate the saw if the chain is loose.

NOTE: The chain is tensioned correctly when

the weight of the chain does not cause it to sag

below the guide bar (with the chain saw sitting in

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around the guide bar.

aWARNING: If the saw is operated with

a loose chain, the chain could jump off

the guide bar and result in serious injury

to the operator and/or damage the chain

making it unusable. If the chain jumps off

the guide bar, inspect each drive link for

damage. Damaged chain must be repaired

or replaced.

FUEL HANDLING

FUELING ENGINE

aWARNING: Remove fuel cap slowly when

refueling.

IMPORTANT: This equipment is designed to operate

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with ethanol blended up to 10% maximum by volume

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a good quality synthetic 2-cycle air-cooled engine oil

designed to be mixed at a ratio of 50:1.

DO NOT USE automotive oil or marine oil. These oils

will cause engine damage. When mixing fuel, follow

instructions printed on container. Once oil is added to

petrol, shake container momentarily to assure that the

fuel is thoroughly mixed. Always read and follow the

safety rules relating to fuel before fueling your unit.

Purchase fuel in quantities that can be used within 30

days to assure fuel freshness.

CAUTION: Never use straight petrol in your unit.

This will cause permanent engine damage and void

the limited warranty. Do not use alternate fuels such

as ethanol blends above 10% by volume (E-15,

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fuels can cause major engine performance and

durability problems.

Petrol, litre Two-stroke oil, litre

50,10

10 0,20

15 0,30

20 0,40

BAR AND CHAIN LUBRICATION

The bar and chain require continuous lubrication.

Lubrication is provided by the automatic oiler system

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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

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pump enough oil for adequate lubrication.

Bar and chain oil is recommended to protect your unit

against excessive wear from heat and friction. If bar

and chain oil is not available, use a good grade SAE

30 oil.

 Never use waste oil for bar and chain lubrication.

 Always stop the engine before removing the oil cap.



STARTING AND STOPPING

CHAIN BRAKE

Ensure chain brake is unlocked by pulling the front

hand guard back toward the front handle as far as

possible. The chain brake must be unlocked before

cutting with the saw.

aWARNING: The chain must not move when

the engine runs at idle speed. If the chain

moves at idle speed refer to CARBURETTOR

ADJUSTMENT within this manual.

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To stop the engine move the ON/STOP switch to the

STOP position.

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as illustrated. Make sure the chain is free to turn

without contacting any object.

aWARNING: Do not attempt to throw or drop-

start the chain saw. Doing so will put the

operator at risk of serious injury due to loss

of control of the chain saw.

IMPORTANT: When pulling the starter rope, do not

use the full extent of the rope as this can cause the

rope to break. Do not let starter rope snap back.

Hold the handle and let the rope rewind slowly.

NOTE: For cold weather starting, start the unit at

FULL CHOKE; allow the engine to warm up before

squeezing the throttle trigger.

NOTE: Do not attempt to cut material with the choke

lever in the FULL CHOKE position.

HELPFUL TIP: If your engine still does not start

after following these instructions, please call

customer support.

STARTING A COLD ENGINE

NOTE: In the following steps, when the choke lever

is pulled out to the full extent, the correct throttle

setting for starting is set automatically.

 The chain brake must be locked when the chain saw

is started. Lock the brake by moving the front hand

guard forward.

 Move ON/STOP switch to the ON position.

 Grip the front handle with your left hand. Hold the

chain saw on the ground by placing your right foot

through the rear handle.

127(7KHUHLVDVLPSOL¿HGVWDUWUHPLQGHUZLWK

illustrations to describe each step on the rear edge

of the saw.

1. Press the primer 10 times. The bulb does need not

WREHFRPSOHWHO\¿OOHGZLWKIXHO

2. Pull the choke lever out to the full choke position.

3. Pull the starter handle with your right hand and

pull out the starter cord slowly until you feel a

UHVLVWDQFHDVWKHVWDUWHUSDZOVHQJDJHWKHQSXOO

¿UPO\DQGUDSLGO\WLPHV

NOTE: If the engine sounds as if it is trying to start

before the 5th pull, stop pulling and immediately

proceed to the next step.

4. Push the choke lever to the half choke position.

5. 3XOOWKHVWDUWHUKDQGOH¿UPO\DQGUDSLGO\XQWLOWKH

engine starts.

Allow the engine to run for approximately 30 seconds.

Then, squeeze and release the throttle trigger to allow

engine to return to idle speed.

NOTE: Ensure chain brake is unlocked by pulling

the front hand guard back toward the front handle

as far as possible. The chain brake must be

unlocked before cutting with the saw. The chain saw

is now ready for use.

STARTING A WARM ENGINE

Follow steps 1,2,4 and 5 in the cold engine starting

instructions.

aWARNING! Long term inhalation of the

engine’s exhaust fumes, chain oil mist

and dust from sawdust can represent a

health risk.

DIFFICULT STARTING

RUVWDUWLQJDÀRRGHGHQJLQH

7KHHQJLQHPD\EHÀRRGHGZLWKWRRPXFKIXHOLILW

has not started after 10 pulls. Flooded engines can

be cleared of excess fuel by pushing the choke lever

LQFRPSOHWHO\WRWKH2))&+2.(SRVLWLRQDQGWKHQ

following the warm engine starting procedure.

Ensure the ON/STOP switch is in the ON position.

Starting could require pulling the starter rope

handle many times depending on how badly the

XQLWLVÀRRGHG,IHQJLQHIDLOVWRVWDUWUHIHUWRWKH

TROUBLESHOOTING TABLE or call customer

support.

9

STOPPING

Stop the engine by pushing the start/stop switch down.

aWARNING! To avoid involuntary start up,

the spark plug cap must always be removed

from the spark plug when the machine is

unsupervised.

CHAIN BRAKE

aWARNING: If the brake band is worn too

thin it may break when the chain brake is

triggered. With a broken brake band, the

chain brake will not stop the chain. The

chain brake should be replaced by an

authorized service dealer if any part is worn

to less than 0.5 mm (0.020 in) thick. Repairs

on a chain brake should be made by an

authorized service dealer.

Take your unit to the place of purchase if

purchased from a servicing dealer, or to the

nearest authorized master service dealer.

This saw is equipped with a chain brake. The brake is

designed to stop the chain if kickback occurs.

The inertia-activated chain brake is locked if the front

hand guard is pushed forward, either manually (by

KDQGRUDXWRPDWLFDOO\E\VXGGHQPRYHPHQW

If the brake is already locked, it is unlocked by pulling

the front handguard back toward the front handle as

far as possible.

When cutting with the saw, the chain brake must be

unlocked.

BRAKING FUNCTION CONTROL

NOTE: The chain brake must be checked several

times daily. The engine must be running when

performing this procedure.

This is the only instance when the saw should be

placed on the ground with the engine running.

3ODFHWKHVDZRQ¿UPJURXQG*ULSWKHUHDUKDQGOH

with your right hand and the front handle with your left

hand. Apply full throttle by fully depressing the throttle

trigger. Activate the chain brake by turning your left

wrist against the hand guard without releasing your

grip around the front handle. The chain should stop

immediately.

WORKING TECHNIQUES

PRACTICING YOUR CUTS

Practice cutting a few small logs using the following

techniques to get the “feel” of using your saw before

you begin a major sawing operation.

 Squeeze the throttle trigger and allow the engine to

reach full speed before cutting.

 Begin cutting with the saw frame against the log.

 Keep the engine at full speed the entire time you are

cutting.

 Allow the chain to cut for you. Exert only light

downward pressure. If you force the cut, damage to

the guide bar, chain, or engine can result.

 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 can occur to the chain, guide

bar, and engine. It is recommended that the engine

not be operated for longer than 30 seconds at full

throttle.

 To avoid losing control when cut is complete, do not

put pressure on saw at end of cut.

 Stop the engine before setting the saw down after

cutting.

FELLING A TREE

PLANNING

aWARNING! Check for broken or dead

branches which can fall while cutting

causing serious injury. Do not cut near

buildings or electrical wires if you do not

know the direction of tree fall, nor cut at

night since you will not be able to see well,

nor during bad weather such as rain, snow,

or strong winds, etc. If the tree makes

contact with any utility line, the utility

FRPSDQ\VKRXOGEHQRWL¿HGLPPHGLDWHO\

Carefully plan your sawing operation in advance.

Clear the work area. You need a clear area all around

the tree so you can have secure footing.

The chainsaw operator should keep on the uphill side

of the terrain as the tree is likely to roll or slide downhill

after it is felled.

Study the natural conditions that can cause the tree to

fall in a particular direction.

Natural conditions that can cause a tree to fall in a

particular direction include:

 The wind direction and speed.

 The lean of the tree. The lean of a tree might not be

apparent due to uneven or sloping terrain. Use a

plumb or level to determine the direction of tree lean.

 Weight and branches on one side.

 Surrounding trees and obstacles.

Look for decay and rot. If the trunk is rotted, it can

snap and fall toward the operator. Check for broken or

dead branches which can fall on you while cutting.

Make sure there is enough room for the tree to fall.

Maintain a distance of 2-1/2 tree lengths from the

nearest person or other objects. Engine noise can

drown out a warning call.

Remove dirt, stones, loose bark, nails, staples, and

wire from the tree where cuts are to be made.

Plan a clear retreat path to the rear and diagonal to

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DQGIHOOLQJGLUHFWLRQLQWKHIROORZLQJGLDJUDP



USING THE NOTCH METHOD

The notch method is used to fell large trees. A notch

is cut on the side of the tree in the desired direction of

fall. After a felling cut is made on the opposite side of

tree, the tree will tend to fall into the notch.

NOTE: If the tree has large buttress roots, remove

them before making the notch. If using saw to

remove buttress roots, keep saw chain from

contacting ground to prevent dulling of the chain.

Make the notch cut by cutting the top of the notch

¿UVW&XWWKURXJKRIWKHGLDPHWHURIWKHWUHH1H[W

complete the notch by cutting the bottom of the notch.

Once the notch is cut remove the notch of wood from

the tree.

After removing the wood from the notch, make the

felling cut on the opposite side of the notch. This is

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higher than the center of the notch. This will leave

enough uncut wood between the felling cut and the

notch to form a hinge. This hinge will help prevent the

tree from falling in the wrong direction.

NOTE: Before felling cut is complete, use wedges to

open the cut if necessary to control the direction of

fall. To avoid kickback and chain damage, use wood

or plastic wedges, but never steel or iron wedges.

Be alert to signs that the tree is ready to fall: cracking

sounds, widening of the felling cut, or movement in the

upper branches.

As tree starts to fall, stop saw, put it down, and get

away quickly on your planned retreat path.

DO NOT cut down a partially fallen tree with your saw.

Be extremely cautious with partially fallen trees that

may be poorly supported. When a tree doesn’t fall

completely, set the saw aside and pull down the tree

with a cable winch, block and tackle, or tractor.

CUTTING A FALLEN TREE

(BUCKING)

Bucking is the term used for cutting a fallen tree to the

desired log size.

aWARNING! Do not stand on the log being

cut. Any portion can roll causing loss of

footing and control. Do not stand downhill of

the log being cut.

IMPORTANT POINTS:

 Cut only one log at a time.

 Cut shattered wood very carefully; sharp pieces of

ZRRGFRXOGEHÀXQJWRZDUGRSHUDWRU

 Use a sawhorse to cut small logs. Never allow

another person to hold the log while cutting and

never hold the log with your leg or foot.

 Do not cut in an area where logs, limbs, and roots

are tangled such as in a blown down area. Drag

the logs into a clear area before cutting by pulling

RXWH[SRVHGDQGFOHDUHGORJV¿UVW

 Make sure the chain will not strike the ground or

any other object during or after cutting.

aWARNING! 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. To avoid

kickback and chain damage, do not use a

metal wedge. Do not attempt to restart your

saw when it is pinched or hung in a log.

TYPES OF BUCKING CUTS

Overcutting begins on the top side of the log with the

bottom of the saw against the log. When overcutting

use light downward pressure.

Undercutting involves cutting on the underside of the

log with top of saw against the log. When undercutting

XVHOLJKWXSZDUGSUHVVXUH+ROGVDZ¿UPO\DQG

maintain control. The saw will tend to push back

toward you.

11

aWARNING! Never turn saw upside down to

undercut. The saw cannot be controlled in

this position.

$OZD\VPDNH\RXU¿UVWFXWRQWKHFRPSUHVVLRQVLGHRI

the log. The compression side of the log is where the

pressure of the log’s weight is concentrated.

BUCKING WITHOUT A SUPPORT

1. Overcut through 1/3 of the diameter of the log.

2. 5ROOWKHORJRYHUDQG¿QLVKZLWKDVHFRQGRYHUFXW

NOTE: Watch for logs with a compression side to

prevent the saw from pinching.

BUCKING USING A LOG OR SUPPORT

STAND

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ORJ<RXU¿UVWFXWVKRXOGH[WHQGRIWKHGLDPHWHU

of the log.

2. Finish with your second cut.

LIMBING AND PRUNING

aWARNING! 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.

aWARNING! Never 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.



IMPORTANT POINTS

 :RUNVORZO\NHHSLQJERWKKDQGV¿UPO\JULSSHGRQ

the saw. Maintain secure footing and balance.

 Watch out for springpoles. Springpoles are small

size limbs which can catch the saw chain and

whip toward you or pull you off balance. Use

extreme caution when cutting small size limbs or

slender material.

 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

LQWKHZRRG¿EHUVLVUHOHDVHG

 Keep a clear work area. Frequently clear

branches out of the way to avoid tripping over

them.

LIMBING

Always limb a tree after it is cut down. Only then can

limbing be done safely and properly.

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 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

aWARNING! Limit pruning to limbs shoulder

height or below. Do not cut if branches

are higher than your shoulder. Get a

professional to do the job.

1. 0DNHWKH¿UVWFXWRQHWKLUGRIWKHZD\WKURXJKWKH

bottom of the limb.

2. Make the second cut all the way through the limb.

3. Make the third overcut leaving a 2.5 to 5

FHQWLPHWHUWRLQFKFROODUIURPWKHWUXQNRIWKH

tree.

MAINTENANCE

aWARNING: Disconnect the spark plug

before performing maintenance except for

carburettor adjustments.

We recommend all service and adjustments

not listed in this manual be performed by an

authorized or Master Service Dealer.

GENERAL RECOMMENDATIONS

The warranty on this unit does not cover items that

have been subjected to operator abuse or negligence.

To receive full value from the warranty, the operator

must maintain the unit as instructed in this manual.

Various adjustments will need to be made periodically

to properly maintain your unit.

IMPORTANT: Have all repairs other than the

recommended maintenance described in the

instruction manual performed by an authorized

service dealer.

If any dealer other than an authorized service

dealer performs work on the product, the company

may not pay for repairs under warranty. It is your

responsibility to maintain and perform general

maintenance.

MAINTENANCE SCHEDULE

Before each use

 Check fuel mixture level

 Check bar lubrication

 Check chain tension

 Check chain sharpness

 Check for damaged parts

 Check for loose caps

 Check for loose fasteners

 Check for loose parts

Every 5 hours*

 ,QVSHFWDQGFOHDQDLU¿OWHU

 Inspect and clean chain brake

 Inspect and clean guide bar

Every 25 hours*

 ,QVSHFWDQGFOHDQVSDUNDUUHVWLQJVFUHHQDQGPXIÀHU

Yearly

 Replace spark plug

 5HSODFHIXHO¿OWHU

 5HSODFHDLU¿OWHU

* Each hour of operation is approximately 2 tanks of

fuel.

MAINTENANCE PROCEDURES

CHECK FOR DAMAGED OR WORN PARTS

Contact an authorized service dealer for replacement

of damaged or worn parts.

NOTE: It is normal for a small amount of oil to

appear under the saw after engine stops. Do not

confuse this with a leaking oil tank.

 ON/STOP Switch - Ensure ON/STOP switch

functions properly by moving the switch to the STOP

position. Make sure engine stops; then restart

engine and continue.

 Fuel Tank - Do not use saw if fuel tank shows signs

of damage or leaks.

 Oil Tank - Do not use saw if oil tank shows signs of

damage or leaks.

13

CHECK FOR LOOSE FASTENERS AND

PARTS

 Bar Nuts

 Chain

 0XIÀHU

 Cylinder Shield

 Air Filter

 Handle Screws

 Vibration Mounts

 Starter Housing

 Front Hand Guard

CHECK CHAIN SHARPNESS

A sharp chain makes wood chips. A dull chain makes

a sawdust powder and cuts slowly. See CHAIN

SHARPENING.

GUIDE BAR

Conditions which require guide bar maintenance:

 Saw cuts to one side or at an angle.

 Saw has to be forced through the cut.

 Inadequate supply of oil to bar/chain.

Check the condition of guide bar each time chain is

sharpened. A worn guide bar will damage the chain

DQGPDNHFXWWLQJGLI¿FXOW

After each use, ensure ON/STOP switch is in the

STOP position, then clean all sawdust from the guide

bar and sprocket hole.

To maintain guide bar:

1. Move ON/STOP switch to STOP.

2. Loosen and remove bar nuts and clutch cover.

Remove bar and chain from saw.

3. &OHDQWKHRLOKROHV$DQGEDUJURRYH%

4. Burring of guide bar rails is a normal process of rail

ZHDU5HPRYHWKHVHEXUUVZLWKDÀDW¿OH

5. :KHQUDLOWRSLVXQHYHQXVHDÀDW¿OHWRUHVWRUH

square edges and sides.

Replace guide bar when the groove is worn, the guide

bar is bent or cracked, or when excess heating or

burring of the rails occurs. If replacement is necessary,

XVHRQO\WKHJXLGHEDUVSHFL¿HGIRU\RXUVDZLQ

the repair parts list or on the decal located on the

chainsaw.

CHECK FUEL MIXTURE LEVEL

See FUELING ENGINE under the OPERATION

section.

LUBRICATION

See GUIDE BAR AND CHAIN OIL under the

OPERATION section.

INSPECT AND CLEAN THE UNIT AND

DECALS

After each use, inspect complete unit for loose or

damaged parts. Clean the unit and decals using a

damp cloth with a mild detergent.

Wipe off unit with a clean dry cloth.

CHECK THE CHAIN BRAKE

See CHAIN BRAKE in the OPERATION section.

CLEAN AIR FILTER

a:$51,1*'RQRWFOHDQ¿OWHULQSHWURORU

RWKHUÀDPPDEOHVROYHQWWRDYRLGFUHDWLQJD

¿UHKD]DUGRUSURGXFLQJKDUPIXOHPLVVLRQV

$GLUW\DLU¿OWHUGHFUHDVHVWKHOLIHDQGSHUIRUPDQFH

of the engine and increases fuel consumption and

KDUPIXOHPLVVLRQV$OZD\VFOHDQ\RXUDLU¿OWHUDIWHU

10 tanks of fuel or 5 hours of operation, whichever

FRPHV¿UVW&OHDQPRUHIUHTXHQWO\LQGXVW\FRQGLWLRQV

$XVHGDLU¿OWHUFDQQHYHUEHFRPSOHWHO\FOHDQHG,WLV

DGYLVDEOHWRUHSODFH\RXUDLU¿OWHUZLWKDQHZRQHDIWHU

every 50 hours of operation, or annually, whichever

FRPHV¿UVW

1. /RRVHQNQRERQDLU¿OWHUFRYHU5HPRYHDLU¿OWHU

cover.

2. 3UHVVGRZQRQZLUHFODPSWRUHOHDVHDLU¿OWHU

5HPRYHDLU¿OWHU

3. &OHDQWKHDLU¿OWHUXVLQJKRWVRDS\ZDWHU5LQVH

with clean cool water. Air dry completely before

reinstalling.

4. 5HLQVWDOODLU¿OWHUDQGUHSRVLWLRQZLUHFODPS

127((QVXUHDLU¿OWHULVFRUUHFWO\LQVWDOOHGDQG

fully seated in pocket before repositioning wire

FODPSDQGUHLQVWDOOLQJDLU¿OWHUFRYHU

5. 5HLQVWDOODLU¿OWHUFRYHU7LJKWHQNQREVHFXUHO\

INSPECT MUFFLER AND SPARK

ARRESTING SCREEN

As the unit is used, carbon deposits build up on the

PXIÀHUDQGVSDUNDUUHVWLQJVFUHHQDQGPXVWEH

UHPRYHGWRDYRLGFUHDWLQJD¿UHKD]DUGRUDIIHFWLQJ

engine performance.

Replace the spark arresting screen if breaks occur.



CLEANING THE SPARK ARRESTING

SCREEN

1. Cleaning is required every 25 hours of operation or

DQQXDOO\ZKLFKHYHUFRPHV¿UVW

2. /RRVHQNQRERQDLU¿OWHUFRYHU5HPRYHDLU¿OWHU

cover.

3. Loosen 3 screws on cylinder cover.

Remove the cylinder cover.

4. /RRVHQDQGUHPRYHWKHVFUHZIURPWKHPXIÀHU

exhaust outlet cover.

5. Remove spark arresting screen. Handle screen

carefully to prevent damage.

6. Clean the spark arresting screen gently with a wire

brush. Replace screen if breaks are found.

7. 5HSODFHDQ\EURNHQRUFUDFNHGPXIÀHUSDUWV

8. Reinstall spark arresting screen.

9. 5HLQVWDOOVFUHZLQPXIÀHUH[KDXVWRXWOHWFRYHU

10. Reinstall the cylinder cover and 3 screws. Tighten

securely.

11. 5HLQVWDOODLU¿OWHUFRYHU7LJKWHQNQREVHFXUHO\

REPLACE SPARK PLUG

The spark plug should be replaced each year to

ensure the engine starts easier and runs better.

,JQLWLRQWLPLQJLV¿[HGDQGQRQDGMXVWDEOH

1. /RRVHQNQRERQDLU¿OWHUFRYHU5HPRYHDLU¿OWHU

cover.

2. Pull off the spark plug boot.

3. Remove spark plug from cylinder and discard.

4. 5HSODFHZLWKVSHFL¿HGVSDUNSOXJDQGWLJKWHQ

securely with a socket wrench.

5. Reinstall the spark plug boot.

6. 5HLQVWDOODLU¿OWHUFRYHU7LJKWHQNQREVHFXUHO\

CARBURETTOR ADJUSTMENT

aWARNING: The chain will be moving

during most of this procedure. Wear your

protective equipment and observe all safety

precautions. The chain must not move at idle

speed.

The carburettor has been carefully set at the factory.

Adjustments may be necessary if you notice any of the

following conditions:

 Chain moves at idle. See IDLE SPEED-T adjustment

procedure.

 Saw will not idle. See IDLE SPEED-T adjustment

procedure.

Idle Speed-T

Allow engine to idle. If the chain moves, idle is too fast.

If the engine stalls, idle is too slow. Adjust speed until

HQJLQHUXQVZLWKRXWFKDLQPRYHPHQWLGOHWRRIDVWRU

VWDOOLQJLGOHWRRVORZ7KHLGOHVSHHGVFUHZLVORFDWHG

in the area above the primer bulb and is labeled T.

 7XUQLGOHVFUHZ7FORFNZLVHWRLQFUHDVHHQJLQH

speed.

 7XUQLGOHVFUHZ7FRXQWHUFORFNZLVHWRGHFUHDVH

engine speed.

If you require further assistance or are unsure about

performing this procedure, contact your authorized

service dealer or call customer support.

COOLING SYSTEM

To keep the working temperature as low as possible

the machine is equipped with a cooling system.

The cooling system consists of:

 Air intake on the starter

 Air guide plate

 )LQVRQWKHÀ\ZKHHO

 &RROLQJ¿QVRQWKHF\OLQGHU

 &\OLQGHUFRYHUGLUHFWVFROGDLURYHUWKHF\OLQGHU

Clean the cooling system with a brush after each use,

more often in demanding conditions. A dirty or blocked

cooling system results in the machine overheating

which causes damage to the piston and cylinder.

15

TROUBLESHOOTING

TROUBLESHOOTING TABLE

aWARNING: Always stop unit and disconnect spark plug before performing all of the recommended

remedies below except remedies that require operation of the unit.

TROUBLE CAUSE REMEDY

Engine will not start or will run only

a few seconds after starting. 1. Ignition switch off.

2. (QJLQHÀRRGHG

3. Fuel tank empty.

4. 6SDUNSOXJQRW¿ULQJ

5. Fuel not reaching carburettor.

1. Move ignition switch to ON.

2. 6HH³'LI¿FXOW6WDUWLQJ´LQ

STARTING AND STOPPING

Section.

3. Fill tank with correct fuel

mixture.

4. Install new spark plug.

5. &KHFNIRUGLUW\IXHO¿OWHU

replace.

Check for kinked or split fuel

line; repair or replace.

Engine will not idle properly. 1. Idle speed requires

adjustment.

2. Carburettor requires

adjustment.

1. See “Carburettor Adjustment”

in the MAINTENANCE Section.

2. Contact an authorized service

dealer.

Engine will not accelerate, lacks

power, or dies under a load. 1. $LU¿OWHUGLUW\

2. Spark plug fouled.

3. Chain brake engaged.

4. Carburettor requires

adjustment.

1. &OHDQRUUHSODFHDLU¿OWHU

2. Clean or replace plug and

regap.

3. Disengage chain brake.

4. Contact an authorized service

dealer.

Engine smokes excessively. 1. Too much oil mixed with

gasoline. 1. (PSW\IXHOWDQNDQGUH¿OOZLWK

correct fuel mixture.

Chain moves at idle speed. 1. Idle speed requires

adjustment.

2. Clutch requires repair.

1. See “Carburettor Adjustment”

in the MAINTENANCE Section.

2. Contact an authorized service

dealer.

&OXWFKFRYHUZLOOQRW¿WSURSHUO\ 1. Chain brake is engaged. 1. See “Resetting the

Chain Brake” in the

TROUBLESHOOTING section.



RESETTING THE CHAIN BRAKE

If the clutch cover is removed accidentally while

the chain brake is locked, the chain brake must be

unlocked so the clutch cover can be assembled

without binding to the clutch drum.

$OLJQWKHQRWFKHVRQWKHEDUWRROVRWKDWWKH\¿WRYHU

the brake rotating link.

CAUTION: The chain brake spring is under tension.

Use care when resetting the brake.

To reset the brake, rotate the link clockwise until

it stops. NOTE: do not hold the brake band while

attempting to reset it.

The front link will be in its downward rotated position

when the chain brake is unlocked.

STORAGE

Perform the following steps after each use:

 Allow the engine to cool, and secure the unit before

storing or transporting.

 Store chain saw and fuel in a well ventilated area

where fuel vapors cannot reach sparks or open

ÀDPHVIURPZDWHUKHDWHUVHOHFWULFPRWRUVRU

switches, furnaces, etc.

 Store chain saw with all guards in place and

position chain saw so that any sharp object cannot

accidentally cause injury.

 Store chain saw well out of the reach of children.

SEASONAL STORAGE

Prepare your unit for storage at the end of the season

or if it will not be used for 30 days or more.

If your chain saw is to be stored for a period of time:

 Clean saw thoroughly before storage.

 Store in a clean dry area.

 Lightly oil external metal surfaces and guide bar.

 Oil the chain and wrap it in heavy paper or cloth.

FUEL SYSTEM

Under FUELING ENGINE in the OPERATION section

of this manual, see message labeled

IMPORTANT regarding the use of gasohol in your

chain saw.

Fuel stabilizer is an acceptable alternative in

minimizing the formation of fuel gum deposits during

storage. Add stabilizer to the petrol in the fuel tank or

fuel storage container.

Follow the mix instructions found on stabilizer

containers. Run engine at least 5 minutes after adding

stabilizer.

ENGINE

 Remove spark plug and pour 1 teaspoon of 2-cycle

engine oil through the spark plug opening. Slowly

pull the starter rope 8 to 10 times to distribute oil.

 Replace spark plug with new one of recommended

type and heat range.

 &OHDQDLU¿OWHU

 Check entire unit for loose screws, nuts, and bolts.

Replace any damaged, broken, or worn parts.

 At the beginning of the next season, use only fresh

fuel having the proper petrol to oil ratio.

OTHER

 Do not store petrol from one season to another.

 Replace your petrol container if it starts to rust.

17

TECHNICAL DATA

CS 50S

(LDAV50MC)

Engine

Cylinder displacement, cm350,2

Cylinder bore, mm 44

Stroke, mm 33

Idle speed, rpm 2800-3200

Power, kW 2,1/9000

Ignition system

Spark plug +XVTYDUQD+47

Brisk PR17YC

Electrode gap, mm 0,6

Fuel and lubrication system

Fuel tank capacity, cm3425

Oil pump capacity at 9,000 rpm, ml/min 13

Oil tank capacity, cm3295

Type of oil pump Automatic

Weight

Chain saw without bar or chain, empty tanks NJOE

Noise emissions (see note 1)

6RXQGSRZHUOHYHOPHDVXUHGG%$ 119

6RXQGSRZHUOHYHOPHDVXUHGG%$$XVWUDOLD 84

Sound power level, guaranteed LWAG%$(XURSH 122

Sound levels (see note 2)

(TXLYDOHQWVRXQGSUHVVXUHOHYHODWWKHRSHUDWRU¶VHDUG%$ 104

Equivalent vibration levels, a hveq (see note 3)

Front handle, m/s27,76

Rear handle, m/s29,33

Chain/bar

Standard bar length LQFPLQFP

Recommended bar lengths LQFPLQFP

Usable cutting length LQFPLQFP

Pitch LQPP

Thickness of drive links PPLQ

Type of drive sprocket/number of teeth Spur/7

Chain speed at max. power, m/sec 24,1

Note 1: Noise emissions in the environment measured as sound power (LWALQFRQIRUPLW\ZLWK(&GLUHFWLYH

2000/14/EC.

Note 2: Equivalent sound pressure level, according to ISO 22868, is calculated as the time-weighted energy total

for different sound pressure levels under various working conditions. Typical statistical dispersion for equivalent

VRXQGSUHVVXUHOHYHOLVDVWDQGDUGGHYLDWLRQRIG%$

Note 3: Equivalent vibration level, according to ISO 22867, is calculated as the time-weighted energy total for

vibration levels under various working conditions. Reported data for equivalent vibration level has a typical

VWDWLVWLFDOGLVSHUVLRQVWDQGDUGGHYLDWLRQRIPV2.



GUIDE BAR AND SAW CHAIN COMBINATIONS

The following cutting attachments are approved for the models covered in this manual.

Guide bar Saw chain

Length Pitch Gauge Max. nose radius Type Length, drive links

(no.)

15 0,325 1,3 10T H30 64

18 0,325 1,3 10T H30 72

19

SYMBOLER

Maskinen kan vara farlig!

Vårdslös eller felaktig

användning kan orsaka

allvarliga skador.

Läs igenom bruksanvisningen

noggrant och se till att du

förstår instruktionerna innan du

använder maskinen.

Använd alltid:

 ögonskydd såsom imsäkra,

ventilerade skyddsglasögon

eller ansiktsmask

 godkänd skyddshjälm

 hörselskydd (öronproppar

eller kåpor) för att skydda din

hörsel

Använd aldrig motorsågen med

bara en hand.

Användaren ska alltid hålla

motorsågen med båda

händerna.

Tillåt aldrig svärdsspetsen

att komma i kontakt med ett

föremål.

Högsta uppmätta kastvärde.

A-viktad ljudtrycksnivå vid

7,5 meter enligt Australien

NSW ”Protection of the

Environment Operations (Noise

Control) Regulation 2008”.

Dessa data anges på etiketten.

XX

Bulleremissioner till

omgivningen enligt Europeiska

Gemenskapens direktiv.

Dessa data anges i avsnittet

TEKNISKA DATA och på

etiketten.

Denna produkt

överensstämmer med gällande

EG-direktiv.

Denna produkt

överensstämmer med gällande

EAC-direktiv.

Denna produkt

överensstämmer med

föreskrifter i Australien gällande

elektromagnetisk kompatibilitet

(EMC).

Använd blyfri bensin och

tvåtaktsolja blandad i

förhållandet 50:1 (2 %).

50:1 bensin-/oljeförhållande.

Kedjeoljelock.

Motorn stannas genom att

tändningen slås ifrån med

stoppkontakten.

Primer.

Chokereglage.

Kedjebroms.

Lås upp kedjebromsen.

Lås kedjebromsen.

Kedjebroms:

 inte låst (vänster)

 låst (höger)

Kedjans rotationsriktning.

Kedjespännare.



Leht laadib ...

McCulloch CS 50S Chainsaw Kasutusjuhend

McCulloch CS 50S Chainsaw Kasutusjuhend

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