Operator′s manual 445 II 445e II 450 II 450e II Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
1 13 2 3 12 11 27 28 29 14 26 4 9 10 8 7 5 30 15 16 6 3 17 31 18 4 32 25 24 23 22 21 20 19 5 6 7 8 9 10 11 12 13 14 16 17 15
18 19 20 21 23 24 25 22 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1 42 43 44 45 46 47 48 49 51 56 2 54 50 55 52 53 A 57 58 60 61 1 59 , 62 63 64 65 66 67
68 70 71 1 2 3 69 72 73 75 74 76 77 79 78 80 81 82 83 84 85 86 87 88 89 90 91 1 3 2 1 1 2 92
93 95 96 99 100 101 102 103 104 105 106 94 98 97 107 1 108 2 111 109 110 112 113 115 116 A B 114 117
KEY TO SYMBOLS Symbols on the machine: WARNING! Chain saws can be dangerous! Careless or incorrect 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. Symbols in the operator’s manual: Switch off the engine before carrying out any checks or maintenance. CAUTION! The start/stop switch automatically returns to run position.
CONTENTS Contents KEY TO SYMBOLS Symbols on the machine: ...................................... Symbols in the operator’s manual: ........................ CONTENTS Contents ............................................................... INTRODUCTION Dear Customer, ..................................................... WHAT IS WHAT? What is what on the chain saw? ........................... GENERAL SAFETY PRECAUTIONS Before using a new chain saw .............................. Important .......................
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 Husqvarna River, for production of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-powered plant.
GENERAL SAFETY PRECAUTIONS Before using a new chain saw • Please read this manual carefully. • (1) - (117) refer to figures on p. 2-6. • 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 Cutting equipment.
GENERAL SAFETY PRECAUTIONS Important IMPORTANT! This chain saw for forest service is designed for forest work such as felling, limbing and cutting. National regulation can restrict the use of the machine. You should only use the saw with the bar and chain combinations we recommend in the chapter Technical data. as well as help you to use your chain saw both efficiently and safely. Attend a training course in chain saw usage if possible.
GENERAL SAFETY PRECAUTIONS carried out professionally. If you need further information please contact your nearest service workshop. ! 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.
GENERAL SAFETY PRECAUTIONS (A) (i.e. when you grasp 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. (9) Muffler The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user.
GENERAL SAFETY PRECAUTIONS • 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.
GENERAL SAFETY PRECAUTIONS • 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 over and file the teeth on the other side. • File all the teeth to the same length. When the length of the cutting teeth is reduced to 4 mm (5/32") the chain is worn out and should be replaced. (23) Check the chain tension every time you refuel.
GENERAL SAFETY PRECAUTIONS 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.
GENERAL SAFETY PRECAUTIONS ! WARNING! Most chain saw accidents happen when the chain touches the operator. Wear personal protective equipment. See instructions under the ”Personal protective equipment” heading. 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.
ASSEMBLY Fitting the bar and chain ! • 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.
FUEL HANDLING Fuel Petrol, litre Note! The machine is equipped with a two-stroke engine and must always be run using a mixture of petrol and twostroke 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.
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. Fuel safety • Never refuel the machine while the engine is running. • Make sure there is plenty of ventilation when refuelling or mixing fuel (petrol and 2-stroke oil). • Move the machine at least 3 m from the refuelling point before starting it. • Never start the machine: 1 If you have spilt fuel or chain oil on the machine.
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.
WORKING TECHNIQUES Before use: (61) 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.
WORKING TECHNIQUES 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. Never saw stacked logs or branches without first separating them. Only saw one log or one piece at a time. Remove the cut pieces to keep your working area safe. (62) Terms 4 Never use the chain saw above shoulder height and try not to cut with the tip of the bar.
WORKING TECHNIQUES risk that the chain will touch the ground when you finish the cut. (73) the tree has no damaged or dead branches that might break off and hit you during felling. 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. (74) 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.
WORKING TECHNIQUES Set the spiked bumper (if one is fitted) just behind the felling hinge. Use full throttle and advance the chain/bar slowly into the tree. Make sure the tree does not start to move in the opposite direction to your intended felling direction. Drive a wedge or breaking bar into the cut as soon as it is deep enough. If you must cut across tree/limb, make two to three cuts, one inch apart, one to two inches deep.
MAINTENANCE 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 authorized service workshop. Carburettor adjustment Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. Checking, maintaining and servicing chain saw safety equipment Note! All service and repair work on the machine demands special training.
MAINTENANCE Throttle trigger lockout Muffler • Make sure the throttle control is locked at the idle setting when the throttle lockout is released. (100) Never use a machine that has a faulty muffler. • Press the throttle lockout and make sure it returns to its original position when you release it. (101) • Check that the throttle trigger and throttle lockout move freely and that the return springs work properly. (102) • Start the chain saw and apply full throttle.
MAINTENANCE 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. (109) 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.
MAINTENANCE 3 Fins on the flywheel. 4 Cooling fins on the cylinder. 5 Cylinder cover (directs cold air over the cylinder). (115) 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. ”Air Injection” centrifugal cleaning Centrifugal cleaning means the following: All air to the carburettor passes through the starter.
MAINTENANCE Maintenance schedule The following is a list of the maintenance steps that must be performed on the machine. Most of the items are described in the Maintenance section. Daily maintenance Weekly maintenance Monthly maintenance Clean the outside of the machine. 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 trigger work safely.
TECHNICAL DATA Technical data 445 II 445e II 450 II 450e II Cylinder displacement, cm3 45,7 45,7 50,2 50,2 Cylinder bore, mm 42 42 44 44 Engine Stroke, mm 33 33 33 33 Idle speed, rpm 2500-2700 2500-2700 2500-2700 2500-2700 Power, kW/ rpm 2,1/9000 2,1/9000 2,4/9000 2,4/9000 Ignition system Spark plug NGK BPMR 7A/ NGK BPMR 7A/ NGK BPMR 7A/ NGK BPMR 7A/ Champion RCJ Champion RCJ 7Y/ Champion RCJ 7Y/ Champion RCJ 7Y/ 7Y/ Husqvarna Husqvarna HQT-1 Husqvarna HQT-1 Husqvarna HQT-1 HQ
TECHNICAL DATA Recommended cutting equipment Chain saw model(s) Husqvarna 445 II, 445e II, 450 II, 450e II has been evaluated for safety according to EN-ISO 116811 (Machinery for forestry - Portable chain saw safety requirements and testing) and fulfills the safety requirements when equipped with the below listed guide bar and saw chain combination(s). We recommend only to use the listed guide bar and saw chain combination(s).
TECHNICAL DATA Filing equipment and filing angles Using Husqvarna file gauge will give you the correct filing angles. We recommend always using a Husqvarna file gauge to restore the sharpness of the saw chain. The part numbers are given in the table below. If you are not sure of how to identify what saw chain you have on your chain saw, please visit www.husqvarna.com for more information.
Original instructions 1157680-26 ´®z+Yd"¶66¨ ´®z+Yd"¶66¨ 2018-10-15