Husqvarna 455 Rancher II, 455e II, 465 Rancher II, 455e Rancher II TrioBrake, 460 Rancher II Owner's Manual

Operator’s manual
Manuel d’utilisation Manual de instrucciones
455 Rancher II, 455e Rancher II
455e Rancher II TrioBrake
460 Rancher II, 465 Rancher II
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Lire attentivement et bien assimiler le manuel d’utilisation avant d’utiliser la machine.
Lea detenidamente el manual de instrucciones y asegúrese de entender su contenido antes de utilizar la máquina.
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FFFFrrrreeeennnncccchhhh ((((44448888----99995555))
SSSSppppaaaannnniiiisssshhhh ((((99996666----111144443333))
))
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Symbols on the machine:
WARNING! Chain saws can be dangerous! Careless or improper use can result in serious or fatal injury to the operator or others.
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Always wear:
• Approved protective helmet
• Approved hearing protection
• Protective goggles or a visor
KEY TO SYMBOLS
Decompression valve: The valve is to
reduce the pressure in the cylinder and make starting easier. You should always use the decompression valve when starting the machine.
Ignition; choke: Set the choke control in
the choke position. This should automatically set the stop switch to the start position.
Adjustment of the oil pump.
Refuelling.
Both of the operator used to operate the chain saw.
Never operate a chain saw holding it with one hand only.
Never let the guide bar tip come in contact with any object.
WARNING! Kickback may occur when the nose or tip of the guide bar touches an object, and cause a lightning fast reverse reaction, kicking the guide bar up and towards the operator. May cause serious personal injury.
Recommended cutting equipment in this example: - Bar length 18 inches - Max tooth count for the bar nose sprocket is 11T - Chain type Husqvarna H42
Other approved bar and chain combinations in Operator’s Manual.
Measured maximum kickback value without chain brake.
s hands must be
Chain oil fill.
Air purge.
Chain brake, activated (right) Chain brake, not activated (left)
Other symbols/decals on the machine refer to special certification requirements for certain markets.
Measured maximum kickback value without triggering the chain brake.
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KEY TO SYMBOLS
Symbols in the operator’s manual:
Switch off the engine by moving the stop switch to the STOP position before carrying out any checks or maintenance. CAUTION! The start/ stop switch automatically returns to run position. In order to prevent unintentional starting, the spark plug cap must be removed from the spark plug when assembling, checking and/or performing maintenance.
Always wear approved protective gloves.
Regular cleaning is required.
Visual check.
Protective goggles or a visor must be worn.
You will find the following labels on your chain saw:
EPA III
Refuelling.
Filling with oil and adjusting oil flow.
The chain brake must be engaged when the chain saw is started.
The Emissions Compliance Period referred to on the Emission Compliance label indicates the number of operating hours for which the engine has been shown to meet Federal emissions requirements.
The engine exhaust from this product contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
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CONTENTS
Contents
KEY TO SYMBOLS
Symbols on the machine: ...................................... 2
Symbols in the operator’s manual: ........................ 3
CONTENTS
Contents ............................................................... 4
INTRODUCTION
Dear customer! ..................................................... 5
WHAT IS WHAT?
What is what on the chain saw? ........................... 6
GENERAL SAFETY PRECAUTIONS
Before using a new chain saw .............................. 7
For Canada: .......................................................... 7
Important .............................................................. 8
Always use common sense .................................. 8
Personal protective equipment ............................. 8
Machine′s safety equipment ................................. 9
Cutting equipment ................................................. 12
ASSEMBLY
Fitting the bar and chain ....................................... 19
FUEL HANDLING
Fuel ....................................................................... 21
Fueling .................................................................. 22
Fuel safety ............................................................ 22
STARTING AND STOPPING
Starting and stopping ............................................ 23
WORKING TECHNIQUES
Before use: ............................................................ 25
General working instructions ................................ 25
How to avoid kickback ........................................... 31
MAINTENANCE
General ................................................................. 33
Carburetor adjustment .......................................... 33
Checking, maintaining and servicing chain saw
safety equipment .................................................. 33
Muffler ................................................................... 35
Starter ................................................................... 36
Air filter .................................................................. 37
Spark plug ............................................................. 37
Lubricating the bar tip sprocket ............................. 37
Needle bearing lubrication .................................... 38
Adjustment of the oil pump. ................................... 38
Cooling system ..................................................... 38
”Air Injection” centrifugal cleaning ......................... 38
Winter use ............................................................. 38
Maintenance schedule .......................................... 40
TECHNICAL DATA
Technical data ....................................................... 41
Saw chain filing and file gauges ........................... 44
FEDERAL EMISSION CONTROL WARRANTY STATEMENT
YOUR W ARRANTY RIGHTS AND OBLIGATIONS 45
AMERICAN STANDARD SAFETY PRECAUTIONS
Safety precautions for chain saw users ................ 47
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INTRODUCTION
Dear customer!
Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689, when the Swedish King Karl XI ordered the construction of a factory on the banks of the Huskvarna River, for production of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water­powered plant. During over 300 years of continuous operation, the Husqvarna factory has produced a lot of different products, from wood stoves to modern kitchen appliances, sewing machines, bicycles , motorcycles etc. In 1956, the first motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working today.
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our highest priority. We develop, manufacture and market high quality motor driven products for forestry and gardening as well as for building and construction industry.
Your purchase gives you access to professional help with repairs and service whenever this may be necessary. If the retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest servicing dealer .
It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this operator
s manual as a valuable document. By following its the second-hand value of the machine can be extended. If you ev er lend or sell this machine, make sure that the borrow er or buyer gets the operator
Thank you for using a Husqvarna product. Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and
appearance of products without prior notice. For customer assistance, contact us at our website: www.usa.husqvarna.com
s manual, so they will also know how to properly maintain and use it.
content (using, service, maintenance etc) the life span and
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28
15
29
16
30
WHAT IS WHAT?
32
31
13
1
2
3
4
5
12
11
10
9
8
7
6
34
17
26
27
What is what on the chain saw?
1 Front hand guard 2 Cylinder cover 3 Air purge 4 Start reminder 5 Right-hand brake trigger (455e Rancher II TrioBrake) 6 Rear handle 7 Information and warning decal 8 Combined start and stop switch 9 Chain oil tank 10 Starter 11 Starter handle 12 Fuel tank 13 Product and serial number plate 14 Throttle lockout 15 Decompression valve 16 Front handle 17 Muffler 18 Bar tip sprocket
25
24
23
22
21
20
18
19
33
35
19 Saw chain 20 Guide bar 21 Bumper spike 22 Chain catcher 23 Chain tensioning screw 24 Clutch cover (460 Rancher II, 465 Rancher II) 25 Oil pump adjustment screw 26 Right hand guard 27 Throttle trigger 28 Clutch cover (455e Rancher II, 455e Rancher II
TrioBrake) 29 Chain tensioner wheel 30 Knob 31 Clutch cover (455 Rancher II) 32 Chain tensioning screw 33 Operator’s manual 34 Combination spanner 35 Guide bar cover
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GENERAL SAFETY PRECAUTIONS
Before using a new chain saw
• Please read this manual carefully.
• Check that the cutting equipment is correctly fitted and adjusted. See instructions under the heading Assembly.
• Refuel and start the chain saw. See the instructions under the headings Fuel Handling and Starting and Stopping.
• Do not use the chain saw until sufficient chain oil has reached the chain. See instructions under the heading Lubricating cutting equipment.
• Long-term exposure to noise can result in permanent hearing impairment. So always use approv ed hearing protection.
WARNING! Under no circumstances ma y the design of the machine be modified
!
without the permission of the manufacturer. Always use genuine accessories. Non-authorized modifications and/or accessories can result in serious personal injury or the death of the operator or others. Your warranty may not cover damage or liability caused by the use of non­authorized accessories or replacement parts.
WARNING! A chain saw is a dangerous tool if used carelessly or incorrectly and
!
can cause serious, even fatal injuries. It is very important that you read and understand the contents of this operator’s manual.
WARNING! Never allow c hildren to use or be in the vicinity of the machine. As the machine is equipped with a spring­loaded stop switch and can be started by low speed and force on the starter handle, even small children under some circumstances can produce the force necessary to start the machine. This can mean a risk of serious personal injury. Therefore remove the spark plug cap when the machine is not under close supervision.
For Canada:
WARNING! When using a chain saw, a fire extinguisher should be available.
WARNING! Keep handles dry, clean and free of oil.
WARNING! Beware of carbon monoxide poisoning. Operate the chainsaw in well ventilated areas only.
WARNING! Do not attempt a pruning or limbing operation in a standing tree unless specifically trained to do so.
WARNING! The inside of the muffler contain chemicals that may be
!
carcinogenic. Avoid contact with these elements in the event of a damaged muffler.
WARNING! Long term inhalation of the engine’s exhaust fumes, chain oil mist
!
and dust from sawdust can represent a health risk.
WARNING! This machine produces an electromagnetic field during operation.
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This field may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical implants to consult their physician and the medical implant manufacturer before operating this machine.
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GENERAL SAFETY PRECAUTIONS
!
Important
IMPORTANT! This chain saw for forest service is designed for forest
work such as felling, limbing and cutting. You should only use the saw with the bar and chain
combinations we recommend in the chapter Technical data.
Never use the machine if you are fatigued, while under the influence of alcohol or drugs, medication or anything that could affect your vision, alertness, coordination or judgement.
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
Do not modify this product or use it if it appears to have been modified by others.
Never use a machine that is faulty. Carry out the checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualified specialists. See instructions under the heading Maintenance.
Never use any accessories other than those recommended in this manual. See instructions under the headings Cutting equipment and Technical data.
CAUTION! Always wear protective glasses or a face visor to reduce the risk of injury from thrown objects. A chain saw is capable of throwing objects, such as wood chips, small pieces of wood, etc, at great force. This can result in serious injury, especially to the eyes.
possible. Your dealer, forestry school or your library can provide information about which training materials and courses are available.
Work is constantly in progress to improv e the design and technology - improvements that increase your safety and efficiency. Visit your dealer regularly to see whether you can benefit from new features that have been introduced.
Personal protective equipment
WARNING! Most chain saw accidents happen when the chain touches the operator. You must use approved personal protective equipment whenever you use the machine. Per sonal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen. Ask your dealer for help in choosing the right equipment.
WARNING! Running an engine in a confined or badly ventilated area can
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result in death due to asphyxiation or carbon monoxide poisoning.
WARNING! Faulty cutting equipment or the wrong combination of bar and saw
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chain increases the risk of kickback! Only use the bar/saw chain combinations we recommend, and follow the filing instructions. See instructions under the heading Technical data.
Always use common sense
It is not possible to cover every conceivable situation you can face when using a chain saw. Always exercise care and use your common sense. Avoid all situations which you consider to be beyond your capability. If you still feel uncertain about operating procedures after reading these instructions, you should consult an expert before continuing. Do not hesitate to contact your dealer or us if you have any questions about the use of the chain saw. We will willingly be of service and provide you with advice as well as help you to use your chain saw both efficiently and safely. Attend a tr aining course in chain saw usage if
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Always wear:
• Approved protective helmet
• Hearing protection
• Protective goggles or a visor
• Gloves with saw protection
• Trousers with saw protection
• Boots with saw protection, steel toe-cap and non-slip sole
• Always have a first aid kit nearby.
GENERAL SAFETY PRECAUTIONS
• Fire Extinguisher and Shovel
Generally clothes should be close-fitting without restricting your freedom of movement.
IMPORT ANT! Sparks can come from the muffler , the bar and chain or other sources. Always have fire extinguishing tools available if you should need them. Help prevent forest fires.
Machine
In this section the machine’s safety features and their function are explained. For inspection and maintenance see instructions under the heading Checking, maintaining and servicing chain saw safety equipment. See instructions under the heading, What is what?, to find where these parts are located on your machine.
The life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information please contact your nearest servicing dealer.
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′′
′′
s safety equipment
WARNING! Never use a machine with defective safety components. Safety equipment must be inspected and maintained. See instructions under the heading Checking, maintaining and servicing chain saw safety equipment. If your machine does not pass all the checks, take the saw to a servicing dealer for repair.
• The chain brake (A) can either be activated manually (by your left hand) or automatically by the inertia release mechanism.
A
• The brake is applied when the front hand guard (B) is pushed forwards or when the right-hand brake trigger (E) is pushed up and forwards.
B
E
• This movement activates a spring-loaded mechanism that tightens the brake band (C) around the engine drive system (D) (clutch drum).
• The front hand guard is not designed solely to activate the chain brake. Another important feature is that it reduces the risk of your left hand hitting the chain if you lose grip of the front handle.
Chain brake and front hand guard
Your chain saw is equipped with a chain brake that is designed to stop the chain if you get a kickback. The chain brake reduces the risk of accidents, but only you can prevent them.
Take care when using your saw and make sure the kickback zone of the bar never touches any object.
• The chain brake must be engaged when the chain saw is started to prevent the saw chain from rotating.
• Use the chain brake as a ”parking brake” when starting and when moving over short distances, to
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GENERAL SAFETY PRECAUTIONS
reduce the risk of moving chain accidentally hitting your leg or anyone or anything close by.
• To release the chain brake pull the front hand guard backwards, towards the front handle.
• Kickback can be very sudden and violent. Most kickbacks are minor and do not always activate the chain brake. If this happens you should hold the chain saw firmly and not let go.
• The way the chain brake is activ ated, either manually or automatically by the inertia release mechanism, depends on the force of the kickback and the position of the chain saw in relation to the object that the kickback zone of the bar strikes.
If you get a violent kickback while the kickbac k zone of the bar is farthest away from you the chain brake is designed to be activated by the inertia in the kickback direction.
If the kickback is less violent or the kickback zone of the bar is closer to you the chain brake is designed to
be activated manually by the movement of your left hand.
• In the felling position the left hand is in a position that makes manual activation of the chain brake impossible. With this type of grip, that is when the left hand is placed so that it cannot affect the movement of the front hand guard, the chain brake can only be activated by the inertia action.
Will my hand always activate the chain brake during a kickback?
No. It takes a certain force to move the hand guard forward. If your hand only lightly touches the front guard or slips over it, the force ma y not be enough to trigger the chain brake. You should also maintain a firm grip of the chain saw handles while working. If you do and experience a kickback, your hand may never leave the front handle and will not activate the chain brake, or the chain brake will only activate after the saw has swung around a considerable distance. In such instances, the chain brake might not have enough time to stop the saw chain before it touches you.
There are also certain positions in which your hand cannot reach the front hand guard to activate the chain brake; for example, when the saw chain is held in felling position.
Will my inertia activated chain brake always activate during kickback in the event of a kickback?
No. First y our brak e m ust be in working order. Testing the brake is simple, see instructions under the heading Checking, maintaining and servicing chain saw safety equipment. We recommend you do bef ore you begin each work session. Second the kickback must be strong enough to activate the chain brake. If the chain brake is too sensitive it would activate all the time which would be a nuisance.
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GENERAL SAFETY PRECAUTIONS
!
Will my chain brake always protect me from injury in the event of a kickback?
No. First, the chain brake must be in working order to provide the intended protection. Second, it must be activated during the kickback as described above to stop the saw chain. Third, the chain brake ma y be activated b ut if the bar is too close to you the brake might not have enough time to slow down and stop the chain before the chain saw hits you.
Only you and proper working technique can eliminate kickback and its danger.
Throttle lockout
The throttle lockout is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you g rasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lockout both move back to their original positions. This arrangement means that the throttle control is automatically locked at the idle setting.
A
Vibration damping system
Your machine is equipped with a vibration damping system that is designed to reduce vibration and make operation easier.
The machine transfer of vibration between the engine unit/cutting equipment and the machine chain saw, including the cutting equipment, is insulated from the handles by vibration damping units.
Cutting hardwoods (most broadleaf trees) creates more vibration than cutting softwoods (most conifers). Cutting with cutting equipment that is blunt or faulty (wrong type or badly sharpened) will increase the vibration level.
s vibration damping system reduces the
s handle unit. The body of the
B
Chain catcher
The chain catcher is designed to catch the chain if it snaps or jumps off. This should not happen if the chain is properly tensioned (see instructions under the heading Assembly) and if the bar and chain are properly serviced and maintained (see instructions under the heading General working instructions).
Right hand guard
Apart from protecting your hand if the chain jumps or snaps, the right hand guard stops branches and twigs from interfering with your grip on the rear handle.
WARNING! Overexposure to vibration can lead to circulatory damage or nerve damage in people who have impaired circulation. Contact your doctor if you experience symptoms of overexposure to vibration. Such symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin colour or condition. These symptoms normally appear in the fingers, hands or wrists. These symptoms may be increased in cold temperatures.
Stop switch
Use the stop switch to switch off the engine.
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GENERAL SAFETY PRECAUTIONS
Muffler
The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user.
WARNING! The exhaust fumes from the engine are hot and may contain sparks
!
which can start a fire. Never start the machine indoors or near combustible material!
In areas with a hot, dry climate there is a high risk of fires. These areas are sometimes subject to government rules requiring among other things the muffler must be equipped with an approved type of spark arrestor screen.
General rules
Only use cutting equipment recommended by us!
See instructions under the heading Technical data.
Keep the chain’s cutting teeth properly
sharpened! Follow our instructions and use the recommended file gauge. A damaged or badly
sharpened chain increases the risk of accidents.
Maintain the correct depth gauge setting! Follow
our instructions and use the recommended depth gauge clearance. Too large a clearance increases
the risk of kickback.
CAUTION! The muffler gets very hot during and after use. This also applies during idling. Be aw are of the fire hazard, especially when working near flammable substances and/or vapours.
WARNING! Never use a saw without a muffler, or with a damaged muffler. A
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damaged muffler may substantially increase the noise level and the fire hazard. Keep fire fighting equipment handy. If a spark arrestor screen is required in your area, never use the saw without or with a broken spark arrestor screen.
Cutting equipment
This section describes how to choose and maintain your cutting equipment in order to:
• Reduce the risk of kickback.
• Reduce the risk of the saw chain breaking or jumping off the bar.
• Obtain optimal cutting performance.
• Extend the life of cutting equipment.
• Avoid increasing vibration levels.
Keep the chain properly tensioned! If the chain is slack it is more likely to jump off and lead to increased wear on the bar, chain and drive sprocket.
Keep cutting equipment well lubricated and
properly maintained! A poorly lubricated chain is
more likely to break and lead to increased wear on the bar, chain and drive sprocket.
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GENERAL SAFETY PRECAUTIONS
Cutting equipment designed to reduce kickback
WARNING! Faulty cutting equipment or the wrong combination of bar and saw
!
chain increases the risk of kickback! Only use the bar/saw chain combinations we recommend, and follow the filing instructions. See instructions under the heading Technical data.
The only way to avoid kickback is to make sure that the kickback zone of the bar never touches anything.
By using cutting equipment with ”built-in” kickback reduction and keeping the chain sharp and well­maintained you can reduce the effects of kickback.
Guide bar
The smaller the tip radius the lower the chance of kickback.
Saw chain
A chain is made up of a number of links, which are available in standard and low-kickback versions.
IMPORTANT! No saw chain design eliminates the danger of kickback.
• Number of drive links. The number of drive links is determined by the length of the bar, the chain pitch and the number of teeth on the bar tip sprocket.
• Bar groove width (inches/mm). The groove in the bar must match the width of the chain drive links.
• Chain oil hole and hole for chain tensioner. The bar must be matched to the chain saw design.
Saw chain
• Chain pitch (inches)
WARNING! Any contact with a rotating saw chain can cause extremely serious
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injuries.
Some terms that describe the bar and chain
To maintain the safety features of the cutting equipment, you should replace a worn or damaged bar or chain with a bar and chain combinations recommended by Husqvarna. See instructions under the heading Technical Data for a list of replacement bar and chain combinations we recommend.
Guide bar
• Length (inches/cm)
• Number of teeth on bar tip sprocket (T).
• Chain pitch (inches). The spacing between the drive links of the chain must match the spacing of the teeth on the bar tip sprocket and drive sprocket.
• Drive link width (mm/inches)
• Number of drive links.
Sharpening your chain and adjusting depth gauge setting
General information on sharpening cutting teeth
• Never use a blunt chain. When the chain is blunt you have to exert more pressure to force the bar through the wood and the chips will be very small. If the chain is very blunt it will produce wood powder and no chips or shavings.
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GENERAL SAFETY PRECAUTIONS
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• A sharp chain eats its way through the wood and produces long, thick chips or shavings.
• The cutting part of the chain is called the cutter and consists of a cutting tooth (A) and the depth gauge (B). The cutters cutting depth is determined by the difference in height between the two (depth gauge setting).
A
B
When you sharpen a cutting tooth there are four important factors to remember.
1 Filing angle
2 Cutting angle
WARNING! Departure from the sharpening instructions considerably increases the risk of kickback.
Sharpening cutting teeth
To sharpen cutting teeth you will need a round file and a file gauge. See instructions under the heading Technical data for information on the size of file and gauge that are recommended for the chain fitted to your chain saw.
• Check that the chain is correctly tensioned. A slack chain will move sideways, making it more difficult to sharpen correctly.
• Always file cutting teeth from the inside face. Reduce the pressure on the return stroke. File all the teeth on one side first, then turn the chain saw and file the teeth on the other side.
3 File position
4 Round file diameter
It is very difficult to sharpen a chain correctly without the right equipment. We recommend that you use our file gauge. This will help you obtain the maximum kickback reduction and cutting performance from your chain.
See instructions under the heading Technical data for information about sharpening your chain.
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• File all the teeth to the same length. When the length of the cutting teeth is reduced to 5/32 inch (4 mm) the chain is worn out and should be replaced.
General advice on adjusting depth gauge setting
• When you sharpen the cutting tooth (A) the depth gauge setting (C) will decrease. To maintain optimal cutting performance the depth gauge (B) has to be filed down to achieve the recommended depth gauge setting. See instructions under the heading Technical data to find the correct depth gauge setting for your particular chain.
A
C
B
GENERAL SAFETY PRECAUTIONS
WARNING! The risk of kickback is increased if the depth gauge setting is
!
too large!
Adjustment of depth gauge setting
Tension the chain as tightly as possible, but not so tight that you cannot pull it round freely by hand.
• The cutting teeth should be newly sharpened before adjusting the depth gauge setting. We recommend that you adjust the depth gauge setting every third time you sharpen the cutting teeth. NOTE! This recommendation assumes that the length of the cutting teeth is not reduced excessively.
• You will need a flat file and a depth gauge tool. We recommend that you use our depth gauge tool to acheive the correct depth gauge setting and bevel f or the depth gauge.
• Place the depth gauge tool over the chain. Detailed information regarding the use of the depth gauge tool, will be found on the package for the depth gauge tool. Use the flat file to file off the tip of the depth gauge that protrudes through the depth gauge tool. The depth gauge setting is correct when you no longer feel resistance as you draw the file along the depth gauge tool.
Tensioning the chain
455 Rancher II, 460 Rancher II, 465 Rancher II
• Loosen the bar nuts that hold the clutch cover/chain brake. Use the combination spanner . Then tighten the bar nuts by hand as tight as you can.
• Raise the tip of the bar and stretch the chain by tightening the chain tensioning screw using the combination spanner. Tighten the chain until it does not sag from the underside of the bar.
• Use the combination spanner to tighten the bar nuts while lifting the tip of the bar at the same time. Check that you can pull the chain round freely by hand and that it does not sag from the underside of the bar.
WARNING! A slack chain may jump off the bar and cause serious or even fatal
!
injury.
The more you use a chain the longer it becomes. It is therefore important to adjust the chain regularly to take up the slack.
Check the chain tension every time you refuel. NOTE! A new chain has a running-in period during which you should check the tension more frequently.
The position of the chain tensioning screw on our chain saws varies from model to model. See instructions under the heading What is what? to find out where it is on your model.
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GENERAL SAFETY PRECAUTIONS
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455e Rancher II, 455e Rancher II TrioBrake
• Release the knob by folding it out.
• Turn the knob anti clockwise to loosen the bar cover.
• Adjust the tension on the chain by turning the wheel down (+) for tighter tension and up (-) to loosen the tension.
• Tighten the bar clutch by turning the knob clockwise.
• Fold the knob back in to lock the tensioning.
Lubricating cutting equipment
WARNING! Poor lubrication of cutting equipment may cause the chain to snap, which could lead to serious, even fatal injuries.
Chain oil
Chain oil must demonstrate good adhesion to the chain and also maintain its flow characteristics regardless of whether it is warm summer or cold winter weather.
As a chain saw manufacturer we have developed an optimal chain oil which has a vegetable oil base. We recommend the use of our own oil for both maximum chain life and to minimise environmental damage. If our own chain oil is not available, standard chain oil is recommended.
Never use waste oil! Using waste oil can be dangerous to you and damage the machine and environment.
IMPORTANT! When using vegetable based saw chain oil, dismantle and clean the groove in the bar and saw chain before long-term storage. Otherwise there is a risk of the saw chain oil oxidizing, which will result in the saw chain becoming stiff and the bar tip sprocket jamming.
Filling with chain oil
• All our chain saws have an automatic chain lubrication system. On some models the oil flow is also adjustable.
• The saw chain oil tank and the fuel tank are designed so that the fuel runs out before the saw chain oil.
However, this safety feature requires that y ou use the right sort of chain oil (if the oil is too thin it will run out before the fuel), and that you also use the recommended cutting equipment (a bar that is too long will use more chain oil).
Checking chain lubrication
• Check the chain lubrication each time you refuel. See instructions under the heading Lubricating the bar tip sprocket.
Aim the tip of the bar at a light coloured surface about 20 cm (8 inches) away. After 1 minute running at 3/4
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GENERAL SAFETY PRECAUTIONS
throttle you should see a distinct line of oil on the light surface.
B Rim sprocket (replaceable)
A B
Regularly check the degree of wear on the drive sprocket. Replace if wear is excessive. Replace the drive sprocket whenever you replace the chain.
Needle bearing lubrication
If the chain lubrication is not working:
• Check that the oil channel in the bar is not obstructed. Clean if necessary.
• Check that the groove in the edge of the bar is clean. Clean if necessary.
• Check that the bar tip sprocket turns freely and that the lubricating hole in the tip sprocket is not blocked. Clean and lubricate if necessary.
If the chain lubrication system is still not working after carrying out the above checks and associated measures you should contact your servicing dealer.
Chain drive sprocket
The clutch drum is fitted with one of the following drive sprockets:
A Spur sprocket (the chain sprocket is welded on the drum)
Both versions of sprockets have a needle bearing on the drive shaft, which has to be greased regularly (once a week). CA UTION! Use only high quality bearing grease or engine oil.
See instructions under the heading Maintenance, Needle bearing lubrication.
Checking wear on cutting equipment
Check the chain daily for:
• Visible cracks in rivets and links.
• Whether the chain is stiff.
• Whether rivets and links are badly worn. Replace the saw chain if it exhibits any of the points
above. We recommend you compare the existing chain with a
new chain to decide how badly the existing chain is worn. When the length of the cutting teeth has worn down to
only 5/32 inch (4 mm) the chain must be replaced.
Guide bar
Check regularly:
• Whether there are burrs on the edges of the bar. Remove these with a file if necessary.
English 17
GENERAL SAFETY PRECAUTIONS
• Whether the groove in the bar has become badly worn. Replace the bar if necessary.
• Whether the tip of the bar is uneven or badly worn. If a hollow forms on the underside of the bar tip this is due to running with a slack chain.
• To prolong the life of the bar you should turn it over daily.
WARNING! Most chain saw accidents happen when the chain touches the
!
operator. Wear personal protective equipment. See
instructions under the heading ”Personal protective equipment”.
Do not tackle any job that you feel you are not adequately trained for. See instructions under the headings Personal protective equipment, How to avoid kickback, Cutting equipment and General working instructions.
Avoid situations where there is a risk of kickback. See instructions under the heading Machine′′′′s safety equipment.
Use the recommended protective equipment and check its condition. See instructions under the heading General working instructions.
Check that all the chain saw safety features are working. See instructions under the headings General working instructions and General safety precautions.
18 – English
Fitting the bar and chain
WARNING! Always wear gloves, when working with the chain.
!
ASSEMBLY
should be tensioned until it does not sag from the underside of the bar.
455 Rancher II, 460 Rancher II, 465 Rancher II
Check that the chain brake is in disengaged position by moving the front hand guard towards the front handle.
Remove the bar nuts and remove the clutch co ver (chain brake). Take off the transportation ring (A).
Fit the bar over the bar bolts. Place the bar in its rearmost position. Place the chain over the drive sprocket locate it in the groove on the bar . Begin on the top edge of the bar.
Make sure that the edges of the cutting links are facing forward on the top edge of the bar.
Fit the clutch cover and locate the chain adjuster pin in the hole in the bar. Check that the drive links of the chain fit correctly over the drive sprocket and that the chain is correctly located in the groove in the bar. Tighten the bar nuts finger tight.
Tension the chain by turning the chain tensioning screw clockwise using the combination spanner. The chain
The chain is correctly tensioned when it does not sag from the underside of the bar, but can still be turned easily by hand. Hold up the bar tip and tighten the bar nuts with the combination spanner.
When fitting a new chain, the chain tension has to be checked frequently until the chain is run-in. Check the chain tension regularly. A correctly tensioned chain ensures good cutting performance and long life.
455e Rancher II, 455e Rancher II TrioBrake
Check that the chain brake is in disengaged position by moving the front hand guard towards the front handle.
Remove the knob and remove the clutch cover (chain brake). Take off the transportation ring.
English 19
ASSEMBLY
Fit the bar over the bar bolts. Place the bar in its rearmost position. Place the chain over the drive sprocket locate it in the groove on the bar . Begin on the top edge of the bar.
Make sure that the edges of the cutting links are facing forward on the top edge of the bar.
Mount the clutch cover and remember to fit the chain adjuster pin in the hole in the bar. Check that the drive links of the chain fit correctly over the drive sprocket and that the chain is correctly located in the groove in the bar .
Tension the chain by turning the wheel down (+). The chain should be tensioned until it does not sag from the underside of the bar.
The chain is correctly tensioned when it does not sag from the underside of the bar, but can still be turned easily by hand. Hold up the bar tip and tighten the bar knob by turning the knob clockwise.
When fitting a new chain, the chain tension has to be checked frequently until the chain is run-in. Check the chain tension regularly. A correctly tensioned chain ensures good cutting performance and long life.
20 – English
FUEL HANDLING
Fuel
Note! The machine is equipped with a two-stroke engine and must always be run using a mixture of gasoline and two-stroke oil. It is important to accurately measure the amount of oil to be mixed to ensure that the correct mixture is obtained. When mixing small amounts of fuel, even small inaccuracies can drastically affect the ratio of the mixture.
WARNING! Always ensure there is adequate ventilation when handling fuel.
!
Gasoline
• Use good quality unleaded gasoline.
• The lowest recommended octane grade is 87 ((RON+MON)/2). If you run the engine on a lower octane grade than 87 so-called knocking can occur. This gives rise to a high engine temperature and increased bearing load, which can result in serious engine damage.
• When working with continuous high revs (e.g. limbing) a higher octane is recommended.
Environment fuel
HUSQVARNA recommends the use of alkylate fuel or environmental fuel for four-stroke engines blended with two-stroke oil as set out below.
Ethanol fuel
Husqvarna recommends commercial available fuel with maximum 10% ethanol content.
Running-in
Avoid running at a too high speed for extended periods during the first 10 hours.
Two-stroke oil
• For best results and performance use HUSQVARNA two-stroke engine oil, which is specially formulated for our air-cooled two stroke-engines.
• Never use two-stroke oil intended for water-cooled engines, sometimes referred to as outboard oil (rated TCW).
• Never use oil intended for four-stroke engines.
Mixing ratio
1:50 (2%) for all engines.
Gasoline, litre Two-stroke oil, litre
2% (1:50)
5 0,10 10 0,20 15 0,30 20 0,40 US gallon US fl. oz. 1 2 1/2 2 1/2 6 1/2 5 12 7/8
Mixing
• Always mix the gasoline and oil in a clean container intended for fuel.
• Always start by filling half the amount of the gasoline to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of gasoline.
• Mix (shake) the fuel mixture thoroughly before filling the machine’s fuel tank.
• Do not mix more than one month’s supply of fuel at a time.
• If the machine is not used for some time the fuel tank should be emptied and cleaned.
Chain oil
• We recommend the use of special oil (chain oil) with good adhesion characteristics.
• Never use waste oil. This results in damage to the oil pump, the bar and the chain.
• It is important to use oil of the right grade (suitable viscosity range) to suit the air temperature.
• In temperatures below 32°F (0°C) some oils become too viscous. This can ov erload the oil pump and result in damage to the oil pump components.
• Contact your service agent when choosing chain oil.
English 21
FUEL HANDLING
!
Fueling
WARNING! Taking the following precautions, will lessen the risk of fire:
!
Do not smoke and do not place any hot objects in the vicinity of fuel.
Always stop the engine and let it cool for a few minutes before refuelling.
When refuelling, open the fuel cap slowly so that any excess pressure is released gently.
Tighten the fuel cap carefully after refuelling.
Always move the machine awa y from the refuelling area and source before starting.
Clean the area around the fuel cap. Clean the fuel and chain oil tanks regularly. The fuel filter must be replaced at least once a year. Contamination in the tanks causes malfunction. Make sure the fuel is well mixed by shaking the container before refuelling. The capacities of the chain oil tank and fuel tank are carefully matched. You should therefore always fill the chain oil tank and fuel tank at the same time.
WARNING! Fuel and fuel vapor are highly flammable. Take care when handling fuel
!
and chain oil. Be aware of the risks of fire, explosion and those associated with inhalation.
Fuel safety
• Never refuel the machine while the engine is running.
• Make sure there is plenty of ventilation when refuelling or mixing fuel (gasoline and 2-stroke oil).
• Move the machine at least 10 ft (3 m) from the refuelling point before starting it.
• Never start the machine:
1 If you have spilled fuel or chain oil on the machine.
Wipe off the spillage and allow remaining fuel to evaporate.
2 If you have spilled fuel on yourself or your clothes,
change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water.
3 If the machine is leaking fuel. Check regularly for leaks
from the fuel cap and fuel lines.
WARNING! Never use a machine with visible damage to the spark plug guard and ignition cable. A risk of sparking arises, which can cause a fire.
Transport and storage
• Always store the chain saw and fuel so that there is no risk of leakages or fumes coming into contact with sparks or naked flames from electrical equipment, electric motors, relays/switches, boilers and the like.
• Always store fuel in an approved container designed for that purpose.
• For longer periods of storage or for transport of the chain saw, the fuel and chain oil tanks should be emptied. Ask where you can dispose of waste fuel and chain oil at your local gas station.
• The guide bar cover must always be fitted to the cutting attachment when the machine is being transported or in storage, in order to prevent accident contact with the sharp chain. Even a non-moving chain can cause serious cuts to yourself or persons you bump into with an exposed chain.
• Remove the spark plug cap from the spark plug. Activate the chain brake.
• Secure the machine during transport.
Long-term storage
Empty the fuel/oil tanks in a well ventilated area. Store the fuel in approved cans in a safe place. Fit the guide bar cover. Clean the machine. See instructions under the heading Maintenance schedule.
Ensure the machine is cleaned and that a complete service is carried out before long-term storage.
22 – English
STARTING AND STOPPING
Starting and stopping
WARNING! Note the following before starting:
!
The chain brake must be engaged when the chain saw is started to reduce the chance of contact with the moving chain during starting.
Never start a chain saw unless the bar, chain and all covers are fitted correctly. Otherwise the clutch can come loose and cause personal injuries.
Place the machine on firm ground. Make sure you have a secure footing and that the chain cannot touch anything.
Keep people and animals well away from the working area.
Never wrap the starter cord around your hand.
Starting
The chain brake should be activated when starting the chain saw. Activate the chain brake by pushing the front hand guard forwards.
Pull the starter handle with your right hand and pull out the starter cord slowly until you feel a resistance (as the starter pawls engage) then pull firmly and rapidly until the engine starts.
Push down the red choke control as soon as the engine fires which can be heard through a "puff" sound. K eep on pulling the cord powerfully until the engine starts.
Warm engine Start position (1): Set the start/stop switch in the choke
position by pulling the red control outward - upward. Then immediately press down on the start/stop switch to attain start throttle setting.
Decompression valve (2): Press the valve to reduce the pressure in the cylinder and make starting easier. Once the machine has started the valve will automatically return to its original setting.
Air purge (3): Press the air purge diaphragm repeatedly until fuel begins to fill the diaphragm (about 6 times). The diaphragm need not be completely filled.
Grip the front handle with your left hand. Put your right foot into the boot grip through the lower section of the rear handle pressing the machine against the ground.
Pull the starter handle with your right hand and pull out the starter cord slowly until you feel a resistance (as the starter pawls engage) then pull firmly and rapidly until the engine starts.
Cold engine Start position (1): Set the start/stop switch in the choke
position by pulling the red control outward - upward. Decompression valve (2): Press the valve to reduce the
pressure in the cylinder and make starting easier. Once the machine has started the valve will automatically return to its original setting.
Air purge (3): Press the air purge diaphragm repeatedly until fuel begins to fill the diaphragm (about 6 times). The diaphragm need not be completely filled.
3
2
1
Grip the front handle with your left hand. Put your right foot into the boot grip through the lower section of the rear handle pressing the machine against the ground.
NOTE! Do not pull the starter cord all the way out and do not let go of the starter handle when the cord is fully extended. This can damage the machine.
As the chain brake is still activated the engine must return to idling speed as soon as possible by disengaging the throttle latch in order to avoid unnecessery wear on the clutch assembly.
There is a simplified start reminder with illustrations to describe each step on the rear edge of the saw.
English 23
STARTING AND STOPPING
Note! Pull the front hand guard towards the front handle. The chain brake is now disengaged. Your saw is ready f or use.
WARNING! Long term inhalation of the engine’s exhaust fumes, chain oil mist
!
and dust from sawdust can represent a health risk.
should use this grip. Use a firm grip with thumbs and fingers encircling the chain saw handles.
• Never start a chain saw unless the bar, chain and all covers are fitted correctly. See instructions under the heading Assembly. Without a bar and chain attached to the chain saw the clutch can come loose and cause serious injury.
• The chain brake should be activated when starting. Se instructions under the heading Start and stop. Do not drop start. This method is very dangerous because you may lose control of the saw.
• Never start the machine indoors. Exhaust fumes can be dangerous if inhaled.
• Observe your surroundings and make sure that there is no risk of people or animals coming into contact with the cutting equipment.
Stopping
Stop the engine by pushing the start/stop switch down.
NOTE! The start/stop switch automatically returns to run position. To avoid involuntary start up, the spark plug cap must always be removed from the spark plug when the machine is unsupervised.
• Always hold the saw with both hands. The right hand should be on the rear handle, and the left hand on the front handle. All people, whether right or left handed,
24 – English
WORKING TECHNIQUES
Before use:
6, 8
1 Check that the chain brake works correctly and is not
damaged. 2 Check that the rear right hand guard is not damaged. 3 Check that the throttle lockout works correctly and is
not damaged. 4 Check that the stop switch works correctly and is not
damaged. 5 Check that all handles are free from oil. 6 Check that the anti vibration system works and is not
damaged. 7 Check that the muffler is securely attached and not
damaged. 8 Check that all parts of the chain saw are tightened
correctly and that they are not damaged or missing. 9 Check that the chain catcher is in place and not
damaged. 10 Check the chain tension.
General working instructions
IMPORTANT! This section describes basic safety rules for using a
chain saw. This information is never a substitute for professional skills and experience. If you get into a situation where you feel unsafe, stop and seek expert advice. Contact your chain sa w dealer, service agent or an experienced chain saw user. Do not attempt an y task that you are not sure you can handle!
Before using a chain saw you must understand the effects of kickback and how to avoid them. See instructions under the heading How to avoid kickback.
Before using a chain saw you must understand the difference between cutting with the top and bottom edges of the bar. See instructions under the headings How to avoid kickbac k and Machine’ s saf ety equipment.
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
Basic safety rules
1 Look around you:
• T o ensure that people , animals or other things cannot
affect your control of the machine.
• To make sure that none of the above might come within reach of your saw or be injured by falling trees.
CAUTION! Follow the instructions abov e, but do not use a chain saw in a situation where you cannot call for help in case of an accident.
2 Do not use the machine in bad weather, such as
dense fog, heavy rain, strong wind, intense cold, etc. Working in bad weather is tiring and often brings added risks, such as icy ground, unpredictable felling direction, etc.
3 Take great care when removing small branches and
avoid cutting bushes (i.e. cutting many small branches at the same time). Small branches can be grab bed by the chain and thrown back at you, causing serious injury.
4 Make sure you can move and stand saf ely. Check the
area around you for possible obstacles (roots, rocks, branches, ditches, etc.) in case you have to move suddenly. Take great care when working on sloping ground.
5 Take great care when cutting a tree that is under
tension. A tree that is under tension may spring back to its normal position before or after being cut. If you position yourself incorrectly or make the cut in the wrong place the tree may hit you or the machine and cause you to lose control. Both situations can cause serious personal injury.
6 Before moving your chain saw switch off the engine
and lock the chain using the chain brake. Carry the chain saw with the bar and chain pointing backwards.
English 25
WORKING TECHNIQUES
Fit a guard to the bar before transporting the chain saw or carrying it for any distance.
7 When you put the chain saw on the ground, lock the
saw chain using the chain brake and ensure you hav e a constant view of the machine. Switch the engine off before leaving your chain saw for any length of time.
WARNING! Sometimes chips get stuck in the clutch cover causing the chain to
!
jam. Always stop the engine before cleaning.
General rules
1 If you understand what kickback is and how it happens
then you can reduce or eliminate the element of surprise. By being prepared you reduce the risk. Kickback is usually quite mild, but it can sometimes be very sudden and violent.
2 Always hold the chain saw firmly with your right hand
on the rear handle and your left hand on the front handle. Wrap your fingers and thumbs around the handles. You should use this grip whether you are right-handed or left-handed. This grip minimizes the effect of kickback and lets you keep the chain saw under control. Do not let go of the handles!
Have control over the workpiece. If the pieces you intend to cut are small and light, they can jam in the saw chain and be thrown towards you. Even if this does not need to be a danger, you may be surprised and lose control of the saw. Ne ver saw stac ked logs or branches without first separating them. Only sa w one log or one piece at a time. Remove the cut pieces to keep your working area safe.
4 Never use the chain saw above shoulder height
and avoid cutting with the tip of the bar . Ne ver use the chain saw one-handed!
5 In order to keep control of your saw, always maintain
a firm foothold. Nev er work on a ladder , in a tree or on any other insecure support.
3 Most kickback accidents happen during limbing. Mak e
sure you are standing firmly and that there is nothing in the way that might make you trip or lose your balance.
Lack of concentration can lead to kickback if the kickback zone of the bar accidentally touches a branch, nearby tree or some other object.
26 – English
6 Always use a fast cutting speed, i.e. full throttle. 7 T ak e great care when y ou cut with the top edge of the
bar, i.e. when cutting from the underside of the object. This is known as cutting with a pushing chain. The chain tries to push the chain saw back towards the user. If the saw chain is jamming, the saw may be pushed back at you.
WORKING TECHNIQUES
8 Unless the user resists this pushing force there is a
risk that the chain saw will move so far backw ards that only the kickback zone of the bar is in contact with the tree, which can lead to a kickback.
There are five important factors you should consider before making a cut:
1 Make sure the cutting equipment will not jam in the
cut.
Cutting with the bottom edge of the bar, i.e. from the top of the object downwards, is known as cutting with a pulling chain. In this case the chain saw pulls itself towards the tree and the front edge of the chain saw body rests naturally on the trunk when cutting. Cutting with a pulling chain gives the operator better control over the chain saw and the position of the kickback zone.
9 Follow the instructions on sharpening and maintaining
your bar and chain. When you replace the bar and chain use only combinations that are recommended by us. See instructions under the headings Cutting equipment and Technical data.
Basic cutting technique
WARNING! Never use a chain saw by holding it with one hand. A chain saw is
!
not safely controlled with one hand. Always have a secure, firm grip around the handles with both hands.
General
• Always use full throttle when cutting!
• Reduce the speed to idle after every cut (running the engine for too long at full throttle without any load, i.e. without any resistance from the chain during cutting, can lead to serious engine damage).
• Cutting from above = Cutting with a pulling chain.
• Cutting from below = Cutting with pushing chain.
Cutting with a pushing chain increases the risk of kickback. See instructions under the heading How to avoid kickback.
Terms
Cutting = General term for cutting through wood. Limbing = Cutting branches off a felled tree. Splitting = When the object you are cutting breaks off
before the cut is complete.
2 Make sure the object you are cutting will not split.
3 Make sure the chain will not strike the ground or any
other object during or after cutting.
4 Is there a risk of kickback?
5 Do the conditions and surrounding terrain affect how
safely you can stand and move about?
T wo factors decide whether the chain will jam or the object that you are cutting will split: the first is how the object is supported before and after cutting, and the second is whether it is in tension.
In most cases you can avoid these problems b y cutting in two stages; from the top and from the bottom. You need to support the object so that it will not trap the chain or split during cutting.
IMPORTANT! If the chain jams in the cut: stop the engine! Don’t try to pull the chain saw free. If you do y ou may be injured by the chain when the chain saw suddenly breaks free. Use a le ver to open up the cut and free the chain saw.
The following instructions describe how to handle the common situations you are likely to encounter when using a chain saw.
Limbing
When limbing thick branches you should use the same approach as for cutting.
English 27
Cut difficult branches piece by piece.
WORKING TECHNIQUES
Turn the log and finish the cut from the opposite side.
1
Cutting
WARNING! Never attempt to cut logs while they are in a pile or when a couple
!
of logs are lying together. Such procedures drastically increase the risk of kickback which can result in a serious or fatal injury.
If you have a pile of logs, each log you attempt to cut should be removed from the pile, placed on a saw horse or runners and cut individually.
Remove the cut pieces from the cutting area. By leaving them in the cutting area, you increase the risk for inadvertently getting a kickback, as well as increasing the risk of losing your balance while working.
2
3
The log is supported at one end. There is a high risk that it will split.
Start by cutting from below (about 1/3 of the way through). Finish by cutting from above so that the two cuts meet.
The log is supported at both ends. There is a high risk that the chain will jam.
Start by cutting from above (about 1/3 of the way through). Finish by cutting from below so that the two cuts meet.
The log is lying on the ground. There is little risk of the chain jamming or the object splitting. However there is a risk that the chain will touch the ground when you finish the cut.
Cut all the way through the log from above. Avoid letting the chain touch the ground as you finish the cut. Maintain full throttle but be prepared for what might happen.
If it is possible (can you turn the log?) stop cutting about 2/3 of the way through the log.
28 – English
Tree felling technique
IMPORTANT! It takes a lot of experience to fell a tree. Inexperienced users of chain saws should not fell trees. Do not attempt any task beyond your experience level!
Safe distance
The safe distance between a tree that is to be felled and anyone else working nearby is at least 2 1/2 tree lengths.
WORKING TECHNIQUES
!
Make sure that no-one else is in this ”risk zone” before or during felling.
Felling direction
The aim is to fell the tree in a position where you can limb and cross-cut the log as easily as possible. You w ant it to fall in a location where you can stand and move about safely.
Once you have decided which wa y you want the tree to fall you must judge which way the tree would fall naturally.
Several factors affect this:
• Lean of the tree
• Bend
• Wind direction
• Arrangement of branches
• Weight of snow
• Obstacles within the reach of the tree: for example, other trees, power lines, roads and buildings.
• Look for signs of damage and rot in the stem, this makes it more probably that the tree will break and start to fall before you expect it to.
Y ou ma y find you are f orced to let the tree f all in its natural direction because it is impossible or dangerous to try to make it fall in the direction you first intended.
Another very important factor, which does not affect the felling direction but does affect y our safety , is to make sure the tree has no damaged or dead branches that might break off and hit you during felling.
The main point to avoid is letting the tree fall onto another tree. It is very dangerous to remove a trapped tree and there is high accident risk. See instructions under the heading Freeing a tree that has fallen badly.
Clearing the trunk and preparing your retreat
Delimb the stem up to shoulder height. It is safer to work from the top down and to have the tree between you and the saw.
Remove any undergrowth from the base of the tree and check the area for obstacles (stones, branches, holes, etc.) so that you have a clear path of retreat when the tree starts to fall. Your path of retreat should be roughly 135 degrees away from the intended felling direction.
Danger zone
Felling direction
Retreat path
Danger zone
Danger zone
Retreat path
Felling
WARNING! Unless you have special training we advise you not to fell trees with a diameter larger than the bar length of your saw!
IMPORTANT! During critical felling operations, hearing protectors should be lifted immediately when sawing is completed so that sounds and warning signals can be heard.
Felling is done using three cuts. First you make the directional cuts, which consist of the top cut and the bottom cut, then you finish with the felling cut. By placing these cuts correctly you can control the felling direction very accurately.
Directional cuts
T o make the directional cut you begin with the top cut. Aim using to the saw’s f elling direction mark (1) tow ard a goal further forward in the terrain, where you would like the tree to fall (2). Stand on the right-hand side of the tree, behind the saw, and cut with a pull stroke.
English 29
WORKING TECHNIQUES
Next make the bottom cut so that it finishes exactly at the end of the top cut.
1
2
The directional cuts should run 1/4 of the diameter through the trunk and the angle between the top cut and bottom cut should be 45°.
The line where the two cuts meet is called the directional cut line. This line should be perfectly horizontal and at right angles (90°) to the chosen felling direction.
Felling cut
The felling cut is made from the opposite side of the tree and it must be perfectly horizontal. Stand on the left side of the tree and cut on the pull stroke.
Make the felling cut about 1.5-2 inches (3-5 cm) above the bottom directional cut.
All control over the felling direction is lost if the felling hinge is too narrow or non-existent, or if the directional cuts and felling cut are badly placed.
When the felling cut and directional cut are complete the tree should start to fall by itself or with the aid of a felling wedge or breaking bar.
We recommend that you use a bar that is longer than the diameter of the tree, so that you can make the felling cut and directional cuts with single cutting strokes. See instructions under the heading Technical data section to find out which lengths of bar are recommended for your saw.
Finish the felling cut parallel with the directional cut line so that the distance between them is at least 1/10 of the trunk diameter. The uncut section of the trunk is called the felling hinge.
The felling hinge controls the direction that the tree falls in.
30 – English
There are methods for felling trees with a diameter larger than the bar length. However these methods involve a much greater risk that the kickback zone of the bar will come into contact with the tree.
Freeing a tree that has fallen badly
Freeing a ”trapped tree”
It is very dangerous to remove a trapped tree and there is high accident risk.
Never try to fell the tree that is trapped.
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