1
Workshop Manual
Chain Saws
Contents
This manual covers models:
2036/2040
2041/2045/2050
2054/2055
625/630/670
2077/2083
2095
General recommendations
2
1. Safety equipment
3
2. Starter unit
17
3. Electrical system
23
4. Fuel system
35
5. Centrifugal clutch
55
6. Lubrication system
65
7. Cylinder and piston
77
8. Crankshaft and crankcase
93
9. Tools
115
10. Technical data
127
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General recommendations
Keep this in mind:
– Do not start the engine without the clutch and clutch drum fitted.
– Do not touch hot parts such as the silencer and clutch before
they have cooled sufficiently to avoid burn injuries.
– Avoid getting petrol on bare skin or in the mouth.
– Wipe up spilled oil immediately from the floor to avoid slipping
and subsequent injury.
– Do not use tools which are worn or fit badly, e.g. nuts and
screws.
– Never start the engine indoors. Exhaust fumes are toxic!
+ Always work on a tidy work bench.
+ Always work methodically to be sure that all parts are correctly
assembled and that screws and nuts are tightened.
+ Use protective cream on your hands. It reduces the risk of
infection and enables dirt to be more easily washed off.
Prolonged contact with motor oil can be hazardous to health.
+ Use special tools when so recommended in order to work
correctly.
Fire hazard
Handle petrol with respect since it is highly inflammable.
Do not smoke and make sure that there are no naked flames or
sparks in the vicinity.
Make sure that there is a functioning fire extinguisher in the vicinity.
Do not attempt to extinguish a petrol fire with water.
Toxic fumes
Read the instructions carefully when using cleaning liquids.
Make sure that there is adequate ventilation when handling petrol,
trichloroethylene and other viscous liquids.
The engine exhaust fumes are toxic. Test run the engine only when
there is good ventilation, preferably outdoors.
Special tools
Some work operations in this workshop manual require the use
of special tools. In each section where this is appropriate the tool
and ord