Husqvarna T425 Operator's Manual
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Husqvarna T425 Operator's Manual

Husqvarna T425 Operator's Manual

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Oper ator ' s manual
T425
Please r ead the operator's manual carefully and make sure you understand the instructions
before using the machine.
E E E E n n n n g g g g l l l l i i i i s s s s h h h h

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Summary of Contents for Husqvarna T425

  • Page 1 Oper ator ′ s manual T425 Please r ead the operator’s manual carefully and make sure you understand the instructions before using the machine. E E E E n n n n g g g g l l l l i i i i s s s s h h h h...

  • Page 2: Key To Symbols

    KEY T O SYMBOLS Symbols on the mac hine: Symbols in the operator’ s manual: W ARNING! Chain saws can be dangerous! Careless or incorrect use can Switch off the engine b y moving the stop result in serious or fatal injury to the switch to the STOP position before operator or others.

  • Page 3: Table Of Contents

    CONTENTS Contents KEY TO SYMBOLS Symbols on the machine: ........2 Symbols in the operator’s manual: ....... 2 CONTENTS Contents ............... 3 INTR ODUCTION Dear Customer , ............ 4 WHA T IS WHAT? What is what on the chain sa w? ......5 GENERAL SAFETY PRECA UTIONS Bef ore using a new chain saw ......

  • Page 4: Intr Oduction

    The business concept is to develop, manufacture and market motor driven products for forestry and gardening as well as for building and construction industry. Husqvarna ′ s aim is also to be in the front edge according to ergonomics, usability, security and environmental protection.

  • Page 5: Wha T Is What

    WHA T IS WHA T? What is what on the c hain saw? Filter cover 16 Front handle Adjuster screws carburettor 17 Oil pump adjustment screw Starter 18 Throttle lockout Fuel tank 19 Throttle trigger Chain oil tank 20 Guide bar Ignition;...

  • Page 6: General Safety Preca Utions

    GENERAL SAFETY PRECA UTIONS Bef ore using a new chain saw Impor tant • Please read this manual carefully. IMPOR TANT! • Check that the cutting equipment is correctly fitted This chain saw for tree service is designed for pruning and adjusted.

  • Page 7: Always Use Common Sense

    GENERAL SAFETY PRECA UTIONS Al ways use common sense • Protective goggles or a visor • Gloves with saw protection It is not possib le to cover every conceivable situation you can face when using a chain saw. Always exercise care and •...

  • Page 8: Machine ' S Safety Equipment

    GENERAL SAFETY PRECA UTIONS Mac hine ′ ′ ′ ′ s safety equipment • This movement activates a spring-loaded mechanism that tightens the brake band (C) around the engine In this section the machine’ s safety features and their drive system (D) (clutch drum). function are explained.
  • Page 9 GENERAL SAFETY PRECAUTIONS • Kickback can be very sudden and violent. Most Will my hand always activate the chain kickbacks are minor and do not always activate the brake during a kickback? chain brake. If this happens you should hold the chain saw firmly and not let go.

  • Page 10: Cutting Equipment

    GENERAL SAFETY PRECAUTIONS Chain catcher Stop switch The chain catcher is designed to catch the chain if it Use the stop switch to switch off the engine. 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).
  • Page 11 Husqvarna. See instructions under the heading Technical Data for a list of replacement bar and chain combinations we recommend.

  • Page 12: Sharpening Your Chain And Adjusting Depth Gauge Setting

    GENERAL SAFETY PRECAUTIONS • Drive link width (mm/inches) Cutting angle File position • Number of drive links. Round file diameter It is very difficult to sharpen a chain correctly without the right equipment. We recommend that you use our file Sharpening your chain and adjusting gauge.

  • Page 13: Tensioning The Chain

    GENERAL SAFETY PRECAUTIONS one side first, then turn the chain saw over and file the • Place the depth gauge tool over the chain. Detailed teeth on the other side. 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.

  • Page 14: Lubricating Cutting Equipment

    GENERAL SAFETY PRECAUTIONS • Use the combination spanner to tighten the bar nut before the fuel), and that you adjust the carburetor as while holding up the tip of the bar. Check that you can recommended (a lean mixture may mean that the fuel pull the saw chain round freely by hand, and that there lasts longer than the oil) and that you also use the is no slack on the underside of the bar.
  • Page 15 GENERAL SAFETY PRECAUTIONS Chain drive sprocket • 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. The clutch drum is fitted with following drive sprockets: A Spur sprocket (the chain sprocket is welded on the drum) •...

  • Page 16: Assembly

    ASSEMBLY Fitting the bar and 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.

  • Page 17: Fuel Handling Fuel

    FUEL HANDLING Fuel Mixing ratio 1:50 (2%) with HUSQVARNA two-stroke oil or JASO FC Note! The machine is equipped with a two-stroke engine or ISO EGC GRADE. and must always be run using a mixture of petrol and two- 1:33 (3%) with oils class JASO FB or ISO EGB formulated stroke oil.

  • Page 18: Fueling

    FUEL HANDLING • In temperatures below 0°C (32°F) some oils become Fuel safety too viscous. This can overload the oil pump and result • Never refuel the machine while the engine is running. in damage to the oil pump components. •...

  • Page 19: Starting And Stopping

    STARTING AND STOPPING Starting and stopping Ignition; choke: Pull the choke knob to the second-stage position. The choke will close and the throttle lever will then be set in the starting position. 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.

  • Page 20: Starting And Stopping

    STARTING AND STOPPING Push in the choke control as soon as the engine fires • Observe your surroundings and make sure that there which can be heard through a "puff" sound. Keep on is no risk of people or animals coming into contact pulling the cord powerfully until the engine starts.

  • Page 21: Working Techniques

    WORKING TECHNIQUES Before use: • To make sure that none of the above might come within reach of your saw or be injured by falling trees. Check that the chain brake works correctly and is not damaged. Check that the throttle lockout works correctly and is CAUTION! Follow the instructions above, but do not use a not damaged.

  • Page 22: General Rules

    WORKING TECHNIQUES Take great care when cutting a tree that is in tension. Most kickback accidents happen during limb A tree that is in tension may spring back to its normal ing. Make sure you are standing firmly and that there position before or after being cut.
  • Page 23 WORKING TECHNIQUES Take great care when you cut with the top edge of the ropes, strops, karabiners and other equipment for bar, i.e. when cutting from the underside of the object. maintaining secure and safe working positions for both This is known as cutting on the push stroke. The chain themselves and the saw.

  • Page 24: Basic Cutting Technique

    WORKING TECHNIQUES Securing the work position for two-handed use • if necessary, use a handsaw or second chain saw to release the trapped saw by cutting a minimum of 30 To allow the operator to hold the saw with both hands, cm away from the trapped saw.
  • Page 25 WORKING TECHNIQUES Is there a risk of kickback? 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). Do the conditions and surrounding terrain affect how safely you can stand and move about? Two factors decide whether the chain will jam or the object that you are cutting will split: the first is how the object is...

  • Page 26: Felling Technique For Tree Tops

    WORKING TECHNIQUES Felling technique for tree tops Another very important factor, which does not affect the felling direction but does affect your safety, is to make sure the tree has no damaged or dead branches that might WARNING! It takes a lot of experience to break off and hit you during felling.

  • Page 27: Freeing A Tree That Has Fallen Badly

    WORKING TECHNIQUES Felling cut Technical data section to find out which lengths of bar are recommended for your saw. The felling cut is made from the opposite side of the tree and it must be perfectly horizontal. Try to take a correct position so you are able to cut on the pull stroke.

  • Page 28: How To Avoid Kickback

    WORKING TECHNIQUES How to avoid kickback WARNING! Kickback can happen very suddenly and violently; kicking the chain saw, bar and chain back at the user. If this happens when the chain is moving it can cause very serious, even fatal injuries.

  • Page 29: Maintenance

    Changing the type of fuel Fine tuning may be required if the chain saw, after changing the type of fuel, performs differently with regard Your Husqvarna product has been designed and to starting, acceleration, maximum speed, etc. manufactured to specifications that reduce harmful Conditions emissions.

  • Page 30: Checking, Maintaining And Servicing Chain Saw Safety Equipment

    MAINTENANCE High speed jet H Checking the front hand guard At the factory the engine is adjusted at sea level. When working at a high altitude or in different weather conditions, temperatures and atmospheric Make sure the front hand guard is not damaged and that humidity, it may be necessary to make minor there are no visible defects such as cracks.

  • Page 31: Muffler

    MAINTENANCE Throttle lockout Vibration damping system • Make sure the throttle control is locked at the idle Regularly check the vibration damping units for cracks or setting when the throttle lockout is released. deformation. Make sure the vibration damping units are securely attached to the engine unit and handle unit.

  • Page 32: Starter

    MAINTENANCE Starter Tensioning the recoil spring • Hook the starter cord in the notch in the pulley and WARNING! When the recoil spring is turn the starter pulley about 2 turns clockwise. wound up in the starter housing it is Note! Check that the pulley can be turned at least a under tension and can, if handled further 1/2 turn when the starter cord is pulled all the...

  • Page 33: Air Filter

    Lubricate the bar tip sprocket each time you refuel. Use the special grease gun and a good quality bearing grease. 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.

  • Page 34: Adjustment Of The Oil Pump

    MAINTENANCE Adjustment of the oil pump. The oil pump is adjustable. Adjustments are made by turning the screw with a screwdriver. Turning the screw clockwise will increase the oil flow, turning it anticlockwise will reduce the oil flow. The oil tank should become nearly empty by time fuel is used up.

  • Page 35: Maintenance Schedule

    MAINTENANCE 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 maintenance Weekly maintenance Monthly maintenance Check the brake band on the chain On chain saws without a catalytic brake for wear.

  • Page 36: Technical Data

    TECHNICAL DATA Technical data T425 Engine Cylinder displacement, cm 25,4 Cylinder bore, mm Stroke, mm Idle speed, rpm 2900 Recommended max. speed, rpm 12500 Power, kW/ rpm 0,96/9000 Ignition system NGK BPMR 7A/ Spark plug Champion RCJ 7Y Electrode gap, mm...

  • Page 37: Guide Bar And Chain Combinations

    TECHNICAL DATA Guide bar and chain combinations The following cutting attachments are approved for the model Husqvarna T425. Guide bar Saw chain Length, inch Pitch, inch Gauge, mm Max. nose radius Type Length, drive links (no.) Husqvarna H00 Husqvarna H36 Saw chain filing and file gauges...

  • Page 38: Ec-Declaration Of Conformity

    Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the chain saw for tree service Husqvarna T425 from 2009’s serial numbers and onwards (the year is clearly stated in plain text on the type plate with subsequent serial number), is in conformity with the requirements of the COUNCIL’S DIRECTIVES: - of May 17, 2006 "relating to machinery"...
  • Page 44 Original instructions 1154617-26 ´®z+V]h¶6v¨ ´®z+V]h¶6v¨ 2011-10-25...

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