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| MAINTENANCE | |
Air filter | Muffler | ||
The air filter must be regularly cleaned from dust and dirt in | |||
order to avoid: |
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• | Carburetor malfunctions |
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• | Starting problems | The muffler is designed in | |
• | Engine power reduction | ||
order to reduce the noise level | |||
• | Unnecessary wear on | ||
and to direct the exhaust | |||
| the engine parts | ||
| gases away from the operator. | ||
• | Abnormal fuel consumption | ||
The exhaust gases are hot | |||
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| and can contain sparks, which | |
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| may cause fire if directed | |
Clean the air filter daily or | against dry and combustible | ||
material. Some mufflers are | |||
more often if the air is | |||
equipped with a special | |||
exceptionally dusty in the | |||
screen. | |||
working area. | |||
If your saw has this type of muffler, you should clean the screen | |||
• | Disassemble the air filter by | ||
at least once a week. This is done with a wire brush. | |||
| removing the cylinder cover | CAUTION! The screen must be replaced, if damaged. The saw | |
| and unscrew the filter. | ||
| will be overheated, if the screen is clogged. This results in | ||
| When reassembling, make | ||
| damage on the cylinder and the piston. Never use a saw with a | ||
| sure that the filter is tight | ||
| clogged or defective muffler. | ||
| against the filter holder. | ||
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| Clean the filter by brushing | A muffler fitted with a catalytic converter reduces the concent- | |
| or shaking it. | ||
| ration of hydrocarbons (HC), oxides of nitrogen (NO) and | ||
• | A more thorough cleaning of | ||
aldehydes emitted with exhaust gases. However, it does not cut | |||
| the filter is obtained by | down carbon monoxide (CO), which you cannot smell! Do not | |
| washing it in water and | run a chain saw in an unventilated area. | |
| soap. |
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An air filter, which is used for | WARNING! | ||
some time, cannot be cleaned | The catalytic converter muffler gets very hot | ||
completely. Therefore it must | ! during and after use. This also applies during | ||
be replaced by a new one, | idling. Be aware of the fire hazard, especially | ||
with regular intervals. | when handling the saw near flammable | ||
IMPORTANT! A damaged air | substances or vapours. | ||
filter must always be |
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replaced. |
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A Jonsered chain saw can be equipped with different types of airfilter according to working and weather conditions, season etc.
Spark plug |
| Needle bearing maintenance |
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The spark plug condition is influenced by: |
| The clutch drum is equipped | A | ||
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• | An incorrect carburetor setting. |
| with one of the following chain |
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• | Wrong fuel mixture (too much oil in the gasoline). | sprockets: |
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• | A dirty air filter. |
| • | Spur sprocket (A) (the chain |
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These factors cause deposits on the spark plug electrodes, |
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| sprocket is welded on the |
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which may result in malfunction and starting difficulties. |
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| drum) |
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If the engine is low on | 0,5 mm | • | Rim sprocket (B) |
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power, difficult to start or |
| (exchangeable) |
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| B | |||
runs poorly at idling speed, |
| Both versions have | |||
always check the spark plug |
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| needle bearing at the drive |
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first. If the spark plug is dirty, |
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| shaft, whitch has to be |
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clean it and check the |
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| greased regularly (once a |
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electrode gap. Readjust if |
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| week). |
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necessary. The correct gap is |
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| NOTE! Use only high |
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0,5 mm (0,020"). The spark |
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plug should be replaced after |
| quality bearing grease. |
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about a month in operation or |
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earlier if the electrodes are |
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badly eroded. |
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IMPORTANT! Always use the recommended spark plug type. An incorrect spark plug can severely damage the piston/cylinder.
English – 31