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All cutters must be sharpened to the same angle, 30°. Different angles result in a roughly, irregu-
larly running chain, increase wear and tear and cause chain beakage.
The 85° front rake of the cutter results from the cut depth of the round file. If the proper file is used
in the right manner, the correct front rake will be obtained automatically.
Files and how to work with them
Use a special round file for chains (dia. 4 mm) for sharpening the chain. Normal round files are not
appropriate for this work.
The file should cut only when pushed forwards (arrow). Lift the file when leading it backwards.
First sharpen the shortest cutter. The length of this cutter is then the standard for all other cutters of
the chain.
Always guide the file horizontally (90° to the guide bar).
The file holder makes file guidance easier. It is marked for the correct 30° sharpening angle (keep
the marks parallel with the chain when filing, see illustration) and limits the cut depth to the correct
4/5 of the file diameter.
After having sharpened the chain, the height of the depth limiter must be checked by means of a
chain gauge.
Correct even the smallest excess height with a special flat file (12).
Round off the front of the depth limiter (13).
Cleaning the sprocket interior, checking and replacing the chain catcher
CAUTION: Before doing any work on the guide bar or chain, always switch off the engine
and pull the plug cap off the spark plug (see “Replacing the spark plug”). Always wear protec-
tive gloves!
CAUTION: Do not start the saw until it has been completely assembled and inspected!
Remove the sprocket cover (4) (see section on “PUTTING INTO OPERATION”) and clean the inte-
rior with a brush.
Remove the chain (3) and guide bar (2).
NOTE:
Make sure that no residue or contaminants remain in the oil guide groove (1) and the chain tight-
ener (6).
For replacing the guide bar, chain, and sprocket see "PUTTING INTO OPERATION".
Chain catcher
Visually inspect the chain catcher (5) for damage and replace if necessary.
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STOP
5
3
2
1
4
6