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MAINTENANCE
Sharpening the saw chain
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!
C
The chain needs sharpening when:
- The sawdust produced when sawing damp wood looks like
wood flour.
- The chain penetrates the wood only under great pressure.
- The cutting edge is visibly damaged.
- The saw is pulled to the left or right when sawing. This is
caused by uneven sharpening of the chain.
Important: Sharpen frequently, but without removing
too much metal!
Generally, 2 or 3 strokes of the file will be enough.
Have the chain resharpened at a service center when you
have already sharpened it yourself several times.
D
Proper sharpening:
CAUTION:
Use only chains and guide bars designed for this saw (see
the Extract from the spare-parts list)!
- All cutters must be of the same length (dimension a).
Cutters with different lengths result in rough running of the
chain and can cause cracks in the chain.
- Minimum cutter length is 3 mm (0.11"). Do not resharpen
the chain when the minimum cutter length has been
reached; at this point, the chain must be replaced (see the
Extract from the spare-parts list and "Replacing the chain").
- The depth of the cut is determined by the difference in
height between the depth limiter (round nose) and the
cutting edge.
- The best results are obtained with a depth-limiter depth of
0.65 mm (.025").
CAUTION:
Excessive depth increases
the risk of kickback!
0.65 mm
(.025")
0.65 mm
(.025")
min.
3 mm (0.11”)
Files and how to work with them
- Sharpen using a special file holder with a saw chain round
file dia. 4.0 mm. Normal round files are not appropriate for
this work. See "Accessories" for the order number.
- 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 standerd for all other cutters of the chain.
- Always guide the file horizontally (90
o
to the guide bar).
E
- All cutters must be sharpened to the same angle, 30°.
Different angles result in a roughly, irregularly 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.
F
STOP
26


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