Husqvarna 3120 XP Owners Manual - Page 31
Rim sprocket B, sprocket is welded on - piston
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MAINTENANCE Air filter The air filter must be regularly cleaned from dust and dirt in order to avoid: • Carburetor malfunctions • Starting problems • Engine power reduction • Unnecessary wear on the engine parts • Abnormal fuel consumption Clean the air filter daily or more often if the air is exceptionally dusty in the working area. • Disassemble the air filter by removing the cylinder cover and unscrew the filter. When reassembling, make sure that the filter is tight against the filter holder. Clean the filter by brushing or shaking it. • A more thorough cleaning of the filter is obtained by washing it in water and soap. An air filter, which is used for some time, cannot be cleaned completely. Therefore it must be replaced by a new one, with regular intervals. IMPORTANT! A damaged air filter must always be replaced. Muffler The muffler is designed in order 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. Some mufflers are equipped with a special screen. If your saw has this type of muffler, you should clean the screen at least once a week. This is done with a wire brush. CAUTION! The screen must be replaced, if damaged. The saw will be overheated, if the screen is clogged. This results in damage on the cylinder and the piston. Never use a saw with a clogged or defective muffler. Needle bearing maintenance IMORTANT! Flocked air filter should be used to avoid abnormal engine wear under extremely dusty conditions, such as cutting wood which contains: sand, volcano ash, burnt wood, construction wood. Note! Air filter type foam must be oiled before use. Use special "Twin Air Oil" or, if ot available, SAE 30. The clutch drum is equipped with one of the following chain A sprockets: Spark plug • Spur sprocket (A) (the chain sprocket is welded on the drum) The spark plug condition is influenced by: • An incorrect carburetto,r setting. • Wrong fuel mixture (too much oil in the gasoline). • A dirty air filter. B These factors cause deposits on the spark plug electrodes, which may result in malfunction and starting difficulties. • Rim sprocket (B) (exchangeable) If the engine is low on power, difficult to start or 0,5 mm runs poorly at idling speed, always check the spark plug first. If the spark plug is dirty, clean it and check the electrode gap. Readjust if necessary. The correct gap is 0,5 mm (0,020"). The spark Both versions have built-in plug should be replaced after needle bearing at the drive about a month in operation or shaft, whitch has to be earlier if the electrodes are greased regularly (once a badly eroded. week). IMPORTANT! Always use the recommended spark plug type. An incorrect spark plug can severely damage the piston/cylinder. NOTE! Use only high quality bearing grease. English - 31