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Summary of Contents for Husqvarna 445S
- Page 1 445S, 445S SA, 445S SA TL, 445S SA TB, 450S, 450S SA Operator's manual 2-38...
- Page 2 Introduction Product description Intended use The Husqvarna 445S, 445S SA, 445S SA TL, 445S This chainsaw for forest service is designed for forest SA TB, 450S, 450S SA are chainsaw models with a work such as felling, delimbing and bucking.
- Page 3 22. Knob of the product is specified in Technical 23. Chain tensioner wheel data on page 35 and on the label. 24. Toolless clutch cover (445S SA TL) 25. Right hand guard 26. Throttle trigger 27. Throttle trigger lockout Choke.
- Page 4 Euro V Emissions WARNING: Tampering with the engine voids the EU type-approval of this product. Safety Safety definitions medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical Warnings, cautions and notes are used to point out implants to consult their physician and the medical specially important parts of the manual.
- Page 5 • The exhaust fumes from the engine are hot and can on the front handle. All people, whether right or left contain sparks, which can start a fire. Never start the handed, should use this grip. Use a firm grip with product near flammable material! thumbs and fingers encircling the handles.
- Page 6 Use boots with saw protection, steel toe-cap and should consult an expert before continuing. Do not non-slip sole. hesitate to contact your dealer or Husqvarna if you • Always have a first-aid kit with you. have any questions about the use of the product.
- Page 7 Chain brake and rear brake trigger (445S SA TB) Right hand guard The right hand guard is a protection for your hand on the CAUTION: Do not lift the product by the rear handle. The right hand guard gives you protection rear brake trigger.
- Page 8 you operate the product near flammable materials and/or fumes. WARNING: Do not use the product if the muffler is missing or damaged. A muffler that is damaged or missing increases the noise level and the risk of fire. Keep fire extinguishing tools near. Do not use a product without, or with a broken, spark arrestor mesh if you must have a spark arrestor mesh in your area.
- Page 9 To adjust saw chain that is damaged or incorrectly sharpened chain and chain drive sprocket. Refer to the tension of the saw chain on page 30 . increases the risk of accidents. • Keep the correct depth gauge setting. Obey the •...
- Page 10 To adjust the tension 8. Tighten the saw chain. Refer to 5. Make sure that the edges of the cutters point forward of the saw chain on page 30 for instructions. on the top edge of the guide bar. 9. Tighten the bar nut. To assemble the guide bar and saw chain (toolless clutch cover) Note:...
- Page 11 Premixed fuel that it is not damaged. • Use Husqvarna premixed alkylate fuel for best 8. Make sure that all parts of the product are correctly performance and extension of the engine life. This attached and not damaged or missing.
- Page 12 For best results and performance use Husqvarna 5. Carefully shake the fuel mixture. two-stroke oil. • If Husqvarna two-stroke oil is not available, use a two-stroke oil of good quality for air-cooled engines. CAUTION: Do not mix fuel for more Speak to your servicing dealer to select the correct than 1 month at a time.
- Page 13 • Use Husqvarna chain oil for maximum saw chain life and to prevent negative effects on the environment. If Husqvarna chain oil is not available, we recommend you to use a standard chain oil.
- Page 14 chain before it touches you. There are also some 3. Push the air purge bulb (B) approximately 6 times or positions in which your hand can not touch the front until fuel starts to fill the bulb. It is not necessary to hand guard to engage the chain brake.
- Page 15 To stop the product WARNING: Do not twist the starter 1. Push the start/stop switch down to stop the engine. rope around your hand. 5. Pull the starter rope handle quickly and with force. WARNING: Do not pull the start/ stop switch up to stop the engine.
- Page 16 To cut a trunk on the ground 1. Cut through the trunk on the pull stroke. Keep full throttle but be prepared for sudden accidents. To use the cutting technique WARNING: Make sure that the saw WARNING: Use full throttle when you chain does not touch the ground when cut and decrease to idle speed after each you complete the kerf.
- Page 17 1. Cut on the pull stroke approximately ⅓ through the trunk. 2. Cut through the remaining part of the trunk on the push stroke to complete the cut. 1. Remove the limbs on the right side of the trunk. a) Keep the guide bar on the right side of the trunk and keep the body of the product against the trunk.
- Page 18 To keep a safe distance b) Cut on the push stroke. 1. Make sure that persons around you keep a safe distance at a minimum of 2 1/2 tree lengths. 2. Make sure that no person is in the risk zone before or during felling.
- Page 19 To free a trapped tree a high accident risk. Refer to on page 21 . To fell a tree Husqvarna recommends you to make the directional WARNING: During critical felling cuts and then use the safe corner method when you fell a tree.
- Page 20 To make the directional cuts 1. Make the directional cuts ¼ of the diameter of the tree. Make a 45°-70° angle between the top directional cut and bottom directional cut. 1. If the usable cutting length is longer than the tree 45º-70º...
- Page 21 To cut trees and branches that are in tension 3. Put a wedge in the kerf straight from behind. 1. Figure out which side of the tree or branch that is in tension. 2. Figure out where the point of maximum tension is. 4.
- Page 22 7. Continue to cut more into the tree until the tree/ 8. Cut the tree/branch from the opposite side of the branch bends and the tension is released. bend, after the tension is released. Maintenance Introduction WARNING: Read and understand the safety chapter before you do maintenance on the product.
- Page 23 Daily maintenance Weekly maintenance Monthly maintenance Clean the air intake on the starter. Make sure that nuts and screws are tightened. Do a check of the stop switch. Refer To do a check of the start/stop switch on page 24 . Make sure that these are no fuel leaks from the engine, tank or fuel lines.
- Page 24 To do a check of the chain catcher 3. Apply full throttle and tilt your left wrist against the front hand guard to engage the chain brake. The 1. Make sure that there is no damage on the chain saw chain must stop immediately. catcher.
- Page 25 Refer to A muffler that is damaged or missing Technical data on page 35 . increases the noise level and the risk of fire. Return product to a Husqvarna CAUTION: If the saw chain rotates dealer/service station if the muffler is at idle speed, turn the idle speed screw damaged.
- Page 26 To examine if the carburetor is correctly 6. Remove the used starter rope from the handle and the pulley. adjusted 7. Attach a new starter rope to the pulley. Wind the • Make sure that the product has the correct starter rope approximately 3 turns around the pulley.
- Page 27 Replace a worn or damaged guide bar or saw chain with the guide bar and saw chain combination recommended by Husqvarna. This is necessary to keep the safety Accessories on functions of the product. Refer to page 36 , for a list of replacement bar and chain combinations that we recommend.
- Page 28 • Number of teeth on bar tip sprocket (T). • Chain pitch, in. The distance between the drive links of the saw chain must align with the distance of the General information about how to sharpen the teeth on the bar tip sprocket and drive sprocket. cutters Do not use a blunt saw chain.
- Page 29 Decrease the pressure on the pull stroke. 1. Use a flat file and a depth gauge tool to adjust the depth gauge setting. Only use a Husqvarna recommended depth gauge tool to get the correct depth gauge setting and bevel for the depth gauge.
- Page 30 To adjust the tension of the saw chain To adjust the tension of the saw chain (toolless clutch cover) WARNING: A saw chain with an Note: incorrect tension can come loose from the Only for toolless clutch cover. guide bar and cause serious injury or death. WARNING: A saw chain with an A saw chain becomes longer when you use it.
- Page 31 5. Fold the knob down. • Make sure that the spur sprocket is not worn, if it is worn speak to your local Husqvarna servicing dealer. To lubricate the needle bearing 1. Pull the front hand guard rearward to disengage the chain brake.
- Page 32 To examine the cutting equipment 4. Examine the groove in the guide bar for wear. Replace the guide bar if it is necessary. 1. Make sure that there are no cracks in rivets and links and that no rivets are loose. Replace if it is necessary.
- Page 33 ™ the air filter. AirInjection extends the life of the air filter starter and the air guide plate, the pawls on the flywheel, and the engine. the cooling fins on the cylinder, the cooling channel and the cylinder cover. 1. Clean the cooling system with a brush weekly or more frequently if it is necessary.
- Page 34 • When the product is no longer in use, send it to • Attach the product safely during transportation. a Husqvarna dealer or discard it at a recycling To prepare your product for long-term location. storage 1. Stop the product and let it become cool before you disassemble it.
- Page 35 Technical data Technical data 445 S 445S SA 445S SA TL 445S SA TB 450S 450S SA Engine Cylinder dis- placement, 50.2 50.2 50.2 50.2 50.2 50.2 Idle speed, 2800 2800 2800 2800 2800 2800 (rpm) Maximum en- gine power acc.
- Page 36 Chainsaw models Husqvarna 445S, 445S SA, 445S Kickback and guide bar nose radius SA TL, 445S SA TB, 450S, 450S SA have been evaluated for safety according to EN ISO 11681-1:2022 For sprocket nose bars the nose radius is specified by (Machinery for forestry - Portable chainsaw safety the number of teeth, such as 11T.
- Page 37 If you are not sure of how to identify what saw chain you have on your chainsaw, please visit Using Husqvarna file gauge will give you the correct www.husqvarna.com for more information. filing angles. We recommend you to always use a Husqvarna file gauge to restore the sharpness of the saw chain.
- Page 38 Description Chainsaw for forest service Brand Husqvarna Type / Model 445S, 445S SA, 445S SA TL, 445S SA TB, 450S, 450S SA Identification Serial numbers dating from 2025 and onwards complies fully with the following EU directives and regulations: Regulation...
- Page 39 2596 - 001 - 30.04.2025...
- Page 40 Original instructions 1144009-26 2025-05-09...
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