Assessments - 4, GPA: 4
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Electrical system _________________________ 7 3. Fuel system _____________________________ 15 4. Centrifugal clutch ________________________ 31 5. Angle gear ______________________________ 37 6. Cylinder and piston ______________________ 41 7. Crankshaft and crankcase _________________ 51 8. Tools ___________________________________ 59 © Copyright Husqvarna AB, Sweden 2003 General recommendations Remember: Special tools Never start the engine without the clutch and clutch drum ! mounted. ! Do not grasp hot elements such as the muffler or the clutch before they have cooled sufficiently to avoid burn injuries. ! Avoid getting petrol on you skin or in your mouth. Use protective cream on your hands. This lowers the risk of infection and makes dirt easier to wash off. Long-term contact with engine oil can be damaging to your health. ! Never run the engine indoors. The engine exhaust is poisonous! Wipe up any spilled oil from the floor immediately in order to ! avoid injuries from slipping. Do not use tools that are worn or fit poorly on nuts and bolts ! and so on. + Always work on a clean work surface. + Always work in a logical manner in order to be sure that all components are correctly attached and that nuts and bolts are tightened. + Use special tools where recommended in order to work correctly. Fire risk Handle petrol with respect, since it is highly flammable. Do not smoke and ensure that there are no open flames or sparks in the vicinity. Make sure that there is a functioning fire extinguisher in the vicinity. Do not try to extinguish a petrol fire with water. Poisonous fumes When using cleaning fluids, read the instructions carefully. Make sure that ventilation is good when handling petrol, trichloroethylene and other highly volatile liquids. The engine exhaust is poisonous. Test run the engine only if ventilation is good. Preferably outside. ! ! WARNING! Risk of personal injury if the instructions are not followed. Certain tasks in this handbook require the use of special tools. In sections where this is applicable, an image of the tool with an ordering number is provided. We recommend using special tools in order to avoid personal injury and to eliminate expensive damage to the components in question. 502 51 03-01 Sealing faces and gaskets Make sure that all sealing faces are clean and free from old gasket remnants. Use a tool that will not damage the sealing face when it is cleaned. Any scratches and irregularities should be removed with a fine, float-cut file. Sealing rings Always change a sealing ring once it has been dismounted. The sensitive sealing lips can be easily damaged with poor sealing ability as a result. The surfaces that the seal is to tighten against must also be completely free from damage. Lubricate the sealing lip with grease before it is attached and make sure that it is not damaged by such things as the collars and splines on an axle. Use tape or a conical bushing as protection. It is important that the sealing ring is turned correctly in order for it to function as intended. NOTE! Material damage may occur if the instructions are not followed. Starter 1. Contents Dismantling _________________________________ 4 Assembly __________________________________ 5 Replacing the drive dogs ______________________ 6 Starter WARNING! Protective glasses should be worn when working on the starter to avoid injury to the eyes if, for some reason, the return spring should fly out.! 502 50 18-01 Remove the bolt in the centre of the starter pulley and remove the starter pulley. Loosen the spring tension. Remove the starter from the engine. Dismantling Dismantling Remove the 4 bolts and lift off the starter. The cylinder cover does not need to be loosened or detached. Loosen the spring tension. Pull out the starter cord about 30 cm. Brake the starter pulley with your thumb and lift the cord as illustrated. Let the starter pulley rotate backwards slowly. Remove the bolt in the centre of the starter pulley. Lift the starter pulley carefully from the starter cover. Starter emove the spring cassette. RRemove the two bolts holding the spring cassette and remove the cassette for replacement if necessary. ! WARNING! Wear protective and cause persoglasses. The return spring can fly out nal injury if improperly handled. Assembly Assembly lean requisite parts and assemble in e reverse order as set out for disman- Clean all components before assembly: thCChange return springs, starter pulleytling. and starter cord as needed. NOTE! Be careful when opening the packaging with the return spring so that the spring does not fly out. Attach the spring cassette. tach the starter pulley. tach the new starter cord. Attach the spring cassette and tighten Atthe two bolts (A). AtLubricate the bearing journal with a little grease and attach the starter pulley. Place the washer in place and tighten the bolt. Attach the new starter cord. Push it in to the starter pulley’s track as illustrated and then out through the cord gui...