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Husqvarna 450 X Torq Owners Manual

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    							MAINTENANCE
    English – 31115 13 81-26 Rev.3 2009-01-14
    General
    The user must only carry out the maintenance and 
    service work described in this Operator’s Manual. More 
    extensive work must be carried out by an authorised 
    service workshop.
    Carburettor adjustment
    Your Husqvarna product has been designed and 
    manufactured to specifications that reduce harmful 
    emissions. 
    Function
    •The carburettor governs the engine’s speed via the 
    throttle control. Air and fuel are mixed in the 
    carburettor. The air/fuel mixture is adjustable. Correct 
    adjustment is essential to get the best performance 
    from the machine.
    • The T-screw regulates the throttle setting at idle 
    speed. If the T-screw is turned clockwise this gives a 
    higher idle speed; turning it anti-clockwise gives a 
    lower idle speed.
    Basic settings and running in
    The basic carburettor settings are adjusted during testing 
    at the factory. Fine adjustment should be carried out by a 
    skilled technician.
    Rec. idle speed: See the Technical data section.
    Fine adjustment of the idle speed T
    Adjust the idle speed with the T-screw. If it is necessary to 
    re-adjust, turn the T-screw clockwise while the engine is 
    running, until the chain starts to rotate. Then turn anti-
    clockwise until the chain stops. When the idle speed is 
    correctly adjusted the engine should run smoothly in 
    every position and the engine speed should be safely 
    below the speed at which the chain starts to rotate.
    Correctly adjusted carburettor
    When the carburettor is correctly adjusted the machine 
    accelerates without hesitation and 4-cycles a little at full 
    throttle. It is also important that the chain does not rotate 
    at idle. If the L-jet is set too lean it may cause starting 
    difficulties and poor acceleration. If the H-jet is set too 
    lean the machine will have less power, poor acceleration 
    and could suffer damage to the engine.
    Checking, maintaining and 
    servicing chain saw safety 
    equipment
    Chain brake and front hand guard
    Checking brake band wear
    Brush off any wood dust, resin and dirt from the chain 
    brake and clutch drum. Dirt and wear can impair operation 
    of the brake.
    Regularly check that the brake band is at least 0.6 mm 
    thick at its thinnest point.
    Checking the front hand guard
    Make sure the front hand guard is not damaged and that 
    there are no visible defects such as cracks.
    Move the front hand guard forwards and back to make 
    sure it moves freely and that it is securely anchored to the 
    clutch cover.
    !
    WARNING! Contact your servicing 
    dealer, if the idle speed setting cannot be 
    adjusted so that the chain stops. Do not 
    use the chain saw until it has been 
    properly adjusted or repaired.
    Note! All service and repair work on the machine 
    demands special training. This is especially true of the 
    machine’s safety equipment. If your machine fails any of 
    the checks described below we recommend that you 
    take it to your service workshop.  
    						
    							MAINTENANCE
    32 – English115 13 81-26 Rev.3 2009-01-14
    Checking the inertia brake release
    Place the chain saw, with the engine switched off, on a 
    stump or other stable surface. Release the front handle 
    and let the saw fall by its own weight, rotating around the 
    rear handle towards the stump.
    When the bar hits the stump the brake should be applied.
    Checking the brake trigger
    Place the chain saw on firm ground and start it. Make sure 
    the chain does not touch the ground or any other object. 
    See the instructions under the heading Start and stop.
    Grasp the chain saw firmly, wrapping your fingers and 
    thumbs around the handles.
    Apply full throttle and activate the chain brake by tilting 
    your left wrist forward onto the front hand guard. Do not let 
    go of the front handle. 
    The chain should stop 
    immediately.
    Throttle lockout
    •Make sure the throttle control is locked at the idle 
    setting when the throttle lockout is released.
    • Press the throttle lockout and make sure it returns to 
    its original position when you release it.
    • Check that the throttle control and throttle lockout 
    move freely and that the return springs work properly.
    • Start the chain saw and apply full throttle. Release the 
    throttle control and check that the chain stops and 
    remains stationary. If the chain rotates when the 
    throttle control is in the idle position you should check 
    the carburettor idle adjustment. 
    						
    							MAINTENANCE
    English – 33115 13 81-26 Rev.3 2009-01-14
    Chain catcher
    Check that the chain catcher is not damaged and is firmly 
    attached to the body of the chain saw.
    Right hand guard
    Check that the right hand guard is not damaged and that 
    there are no visible defects, such as cracks.
    Vibration damping system
    Regularly check the vibration damping units for cracks or 
    deformation.
    Make sure the vibration damping units are securely 
    attached to the engine unit and handle unit.
    Stop switch
    Start the engine and make sure the engine stops when 
    you move the stop switch to the stop setting.
    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. 
    Muffler
    Never use a machine that has a faulty muffler.
    Regularly check that the muffler is securely attached to 
    the machine.
    Some mufflers are equipped with a special spark arrestor 
    mesh. If your machine has this type of muffler, you should 
    clean the mesh at least once a week. This is best done 
    with a wire brush. A blocked mesh will cause the engine 
    to overheat and may lead to serious damage.
    Note! The mesh must be replaced if it is damaged. If the 
    mesh is blocked the machine will overheat and this will 
    cause damage to the cylinder and piston. Never use a 
    machine with a muffler that is in poor condition. 
    Never  
    						
    							MAINTENANCE
    34 – English115 13 81-26 Rev.3 2009-01-14
    use a muffler if the spark arrestor mesh is missing or 
    defective.
    The muffler is designed to reduce the noise level and to 
    direct the exhaust gases away from the operator. The 
    exhaust gases are hot and can contain sparks, which may 
    cause fire if directed against dry and combustible 
    material.
    Starter
    Replacing the starter cord
    •Loosen the screws that hold the starter against the 
    crankcase and remove the starter.
    • Pull out the cord approx. 30 cm and hook it into the 
    notch in the rim of the pulley. Release the recoil spring 
    by letting the pulley rotate slowly backwards.
    • Undo the bolt in the centre of the pulley and remove 
    the drive disc (A), drive disc spring (B) and the pulley 
    (C). Insert and secure a new starter cord in the starter 
    pulley. Wind approx. 3 turns of the starter cord on the 
    starter pulley. Fit the starter pulley so that the end of 
    the recoil spring (D) hooks into the starter pulley. Now 
    assemble the drive disc spring, drive disc and the bolt 
    in the centre of the pulley. Carry the starter cord 
    through the hole in the starter housing and the starter 
    handle. Tie a good knot on the starter cord.
    Tensioning the recoil spring
    •Hook the starter cord in the notch in the pulley and 
    turn the starter pulley about 2 turns clockwise.
    Note! Check that the pulley can be turned at least a 
    further 1/2 turn when the starter cord is pulled all the 
    way out.
    Stretch the line with the handle. Move your thumb and 
    release the line. See the figure below.
    !
    WARNING! When the recoil spring is 
    wound up in the starter housing it is 
    under tension and can, if handled 
    carelessly, pop out and cause personal 
    injury.
    Care must be exercised when replacing 
    the return spring or the starter cord. 
    Wear protective glasses and protective 
    gloves.
    12 
    						
    							MAINTENANCE
    English – 35115 13 81-26 Rev.3 2009-01-14
    Replacing the return and drive springs
    Recoil spring (A)
    •Lift up the starter pulley. See instructions under the 
    heading Changing a broken or worn starter cord. 
    Remember that the recoil spring is coiled under 
    tension in the starter housing.
    • Remove the cassette with the recoil spring from the 
    starter.
    • Lubricate the recoil spring with light oil. Fit the 
    cassette with recoil spring in the starter. Fit the starter 
    pulley and tension the recoil spring.
    Drive disc spring (B)
    •Undo the bolt in the centre of the pulley and remove 
    the drive disc and the drive disc spring.
    • Replace the drive disc spring and fit the drive disc 
    above the spring.
    Fitting the starter
    •To fit the starter, first pull out the starter cord and place 
    the starter in position against the crankcase. Then 
    slowly release the starter cord so that the pulley 
    engages with the pawls.
    • Fit and tighten the screws that hold the starter.
    Air filter
    The air filter must be regularly cleaned to remove dust and 
    dirt in order to avoid:
    • Carburettor malfunctions
    • Starting problems
    • Loss of engine power
    • Unnecessary wear to engine parts.
    • Excessive fuel consumption.
    • Remove the air filter after taking off the air filter cover. 
    When refitting make sure that the air filter seals tightly 
    against the filter holder. Clean the filter by brushing or 
    shaking it.
    The filter can be cleaned more thoroughly by washing it in 
    water and detergent.
    An air filter that has been in use for a long time cannot be 
    cleaned completely. The filter must therefore be replaced 
    with a new one at regular intervals. 
    A damaged air filter 
    must always be replaced.
    A HUSQVARNA chain saw can be equipped with different 
    types of air filter according to working conditions, weather, 
    season, etc. Contact your dealer for advice.
    A
    B 
    						
    							MAINTENANCE
    36 – English115 13 81-26 Rev.3 2009-01-14
    Spark plug
    The spark plug condition is influenced by:
    • Incorrect carburettor adjustment.
    • An incorrect fuel mixture (too much or incorrect type of 
    oil).
    • A dirty air filter.
    These factors cause deposits on the spark plug 
    electrodes, which may result in operating problems and 
    starting difficulties.
    If the machine is low on power, difficult to start or runs 
    poorly at idle speed: always check the spark plug first 
    before taking any further action. If the spark plug is dirty, 
    clean it and check that the electrode gap is 0.5 mm. The 
    spark plug should be replaced after about a month in 
    operation or earlier if necessary.
    Note! Always use the recommended spark plug type! Use 
    of the wrong spark plug can damage the piston/cylinder. 
    Check that the spark plug is fitted with a suppressor.
    Lubricating the bar tip sprocket
    Lubricate the bar tip sprocket each time you refuel. Use 
    the special grease gun and a good quality bearing grease.
    Needle bearing lubrication
    The clutch drum has a needle bearing on the output shaft. 
    This needle bearing must be lubricated regularly.
    When lubricating, remove the clutch cover by loosening 
    the two bar nuts. Lay the saw on its side with the clutch 
    drum upwards.
    Lubrication involves engine oil dripping into the centre of 
    the clutch drum as it rotates.
    Cooling system
    To keep the working temperature as low as possible the 
    machine is equipped with a cooling system.
    The cooling system consists of:
    1 Air intake on the starter.
    2 Air guide plate.
    3 Fins on the flywheel.
    4 Cooling fins on the cylinder.
    5 Cylinder cover (directs cold air over the cylinder).
    Clean the cooling system with a brush once a week, more 
    often in demanding conditions. A dirty or blocked cooling 
    system results in the machine overheating which causes 
    damage to the piston and cylinder. 
    						
    							MAINTENANCE
    English – 37115 13 81-26 Rev.3 2009-01-14
    ”Air Injection” centrifugal 
    cleaning
    Centrifugal cleaning means the following: All air to the 
    carburettor passes through the starter. Dirt and dust is 
    centrifuged out by the cooling fan.
    IMPORTANT! In order to maintain operation of the 
    centrifugal cleaning system it must be regularly 
    maintained. Clean the air intake to the starter, the fins on 
    the flywheel, the space around the flywheel, inlet pipe and 
    carburettor compartment.
    Winter use
    Running problems can occur when using the machine in 
    the cold and snowy conditions caused by:
    • Too low engine temperature.
    • Icing of the air filter and carburettor.
    Special measures are therefore often required:
    • Partly mask the air inlet on the starter to increase the 
    working temperature of the engine.
    Temperature -5°° ° °C or colder:
    For running the machine in cold weather or powder snow, 
    a special cover is available, which is mounted on the 
    starter housing. This reduces the intake of cold air and 
    prevents large amounts of snow from being sucked in.
    CAUTION! If the special winterising kit has been fitted or 
    any measures have been taken to increase the 
    temperature these changes must be reversed before the machine is used in normal temperature conditions. 
    Otherwise there is a risk of overheating, resulting in 
    severe damage to the engine.
    IMPORTANT! Any maintenance other than that described 
    in this manual must be carried out by your servicing dealer 
    (retailer). 
    						
    							38 – English
    MAINTENANCE
    115 13 81-26 Rev.3 2009-01-14
    Maintenance schedule
    The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the 
    Maintenance section.
    Daily maintenanceWeekly maintenanceMonthly maintenance
    Clean the outside of the machine.On chain saws without a catalytic 
    converter, check the cooling system 
    weekly.Check the brake band on the chain 
    brake for wear. Replace when less 
    than 0.6 mm (0,024 inch) remains at 
    the most worn point.
    Check that the components of the 
    throttle control work safely. (Throttle 
    lockout and throttle control.)Check the starter, starter cord and 
    return spring.Check the clutch centre, clutch drum 
    and clutch spring for wear.
    Clean the chain brake and check that 
    it operates safely. Make sure that the 
    chain catcher is undamaged, and 
    replace it if necessary.Check that the vibration damping 
    elements are not damaged.Clean the spark plug. Check that the 
    electrode gap is 0.5 mm.
    The bar should be turned regularly for 
    more even wear. Check the 
    lubrication hole in the bar, to be sure it 
    is not clogged. Clean the bar groove. 
    If the bar has a sprocket tip, this 
    should be lubricated.
    Lubricate the clutch drum bearing.Clean the outside of the carburettor.
    Check that the bar and chain are 
    getting sufficient oil.File off any burrs from the edges of 
    the bar.Check the fuel filter and the fuel hose. 
    Replace if necessary.
    Check the saw chain with regard to 
    visible cracks in the rivets and links, 
    whether the saw chain is stiff or 
    whether the rivets and links are 
    abnormally worn. Replace if 
    necessary.
    Clean or replace the spark arrestor 
    mesh on the muffler.Empty the fuel tank and clean the 
    inside.
    Sharpen the chain and check its 
    tension and condition. Check the drive 
    sprocket for excessive wear and 
    replace if necessary.
    Clean the carburettor compartment.Empty the oil tank and clean the 
    inside.
    Clean the starter units air intake.Clean the air filter. Replace if 
    necessary.Check all cables and connections.
    Check that nuts and screws are tight.
    Check that the stop switch works 
    correctly.
    Check that there are no fuel leaks 
    from the engine, tank or fuel lines.
    On chain saws with a catalytic 
    converter, check the cooling system 
    daily. 
    						
    							English – 39
    TECHNICAL DATA
    115 13 81-26 Rev.3 2009-01-14
    Technical data
    Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC.
    Note 2: Equivalent sound pressure level, according to ISO 22868, is calculated as the time-weighted energy total for 
    noise pressure levels under various working conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 
    max. speed.
    Note 3: Equivalent vibration level, according to ISO 22867, is calculated as the time-weighted energy total for vibration 
    levels under various working conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 max. speed.
    445445e450e
    Engine
    Cylinder displacement, cm345,745,750,2
    Cylinder bore, mm424244
    Stroke, mm333333
    Idle speed, rpm270027002700
    Power, kW/ rpm2,1/90002,1/90002,4/9000
    Ignition system
    Manufacturer of ignition systemWalbroWalbroWalbro
    Type of ignition systemMBU-16MBU-16MBU-16
    Spark plugNGK BPMR 7A/ 
    Champion RCJ 7Y/ 
    Husqvarna PR 17YNGK BPMR 7A/ 
    Champion RCJ 7Y/ 
    Husqvarna PR 17YNGK BPMR 7A/ 
    Champion RCJ 7Y/ 
    Husqvarna PR 17Y
    Electrode gap, mm0,50,50,5
    Fuel and lubrication system
    Manufacturer of carburettorZamaZamaZama
    Carburettor typeEL 37EL 37EL 37
    Fuel tank capacity, litre0,450,450,45
    Oil pump capacity at 9,000 rpm, ml/min131313
    Oil tank capacity, litre0,260,260,26
    Type of oil pumpNot adjustableNot adjustableNot adjustable
    Weight
    Chain saw without bar or chain, empty tanks, kg4,95,15,1
    Noise emissions (see note 1)
    Sound power level, measured dB(A)112112113
    Sound power level, guaranteed LWA dB(A)114114115
    Sound levels (see note 2)
    Equivalent sound pressure level at operator’s ear, measured 
    according to relevant international standards, dB(A)103103104
    Vibration levels (see note 3)
    Front handle, m/s21,91,92,3
    Rear handle, m/s22,62,62,7
    Chain/bar
    Standard bar length, inch/cm13/3313/3313/33
    Recommended bar lengths, inch/cm13-20/33-5013-20/33-5013-20/33-50
    Usable cutting length, inch/cm12-19/31-4912-19/31-4912-19/31-49
    Pitch, inch/mm0,325/8,250,325/8,250,325/8,25
    Thickness of drive links, inch/mm0,050/1,30,050/1,30,050/1,3
    0,058/1,50,058/1,50,058/1,5
    Type of drive sprocket/number of teethSpur/7Spur/7Spur/7
    Chain speed at max. power, m/sec17,317,317,3 
    						
    							40 – English
    TECHNICAL DATA
    115 13 81-26 Rev.3 2009-01-14
    Bar and chain combinations
    The following combinations are CE approved.
    Saw chain filing and file gauges
    BarChain
    Length, inchPitch, inchGauge, mmMax. nose radiusTypeLength, drive links (no.)
    130,325
    1,3
    10T
    Husqvarna H30
    56
    150,32510T64
    160,32510T66
    180,32510T72
    200,32510T78
    130,325
    1,5
    10T
    Husqvarna H25
    56
    150,32510T64
    160,32510T66
    180,32510T72
    200,32512T78 
    						
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