Maintenance; Sharpening The Saw Chain - Dolmar PS-9010 Manuel D'emploi Et De Sécurité

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
protective gloves!
A
The chain needs sharpening when:
- The sawdust produced when sawing humid wood looks like
wood flour.
- The chain penetrates the wood only under great pressure.
- The cutting edge is visibly damaged.
- The sawing device is pulled to the left or right when sawing.
This is caused by an unequal sharpening of the chain.
Important: Sharpen regularly, but only slightly.
Generally 2-3 touches are enough.
Have the chain resharpened in a service center when you
have already sharpened it yourself several times.
25°
C
D
- The sharpening angle of 25
Different angles result in a roughly, irregularly running chain,
increase wear and tear and cause chain ruptures.
- The front rake of 60 depends on the cut depth of the round
o
file. If the file to be used is guided correctly, the correct front
rake results automatically.
25°
60°
60°
must be equal for all cutters.
o
=
B
Characteristics of a correctly sharpened chain (type
099):
- All cutters must be of the same length (=). Cutters with
different lengths result in a rough running of the chain and
produce cracks in the chain.
- The best cutting results are achieved with a depth limiter
distance of 0.64 mm (.025"). The distance between the
depth limiter and the cutting edge determines the depth of
the cut.
CAUTION:
If the distance is too wide, the risk of kickbacks in-
creases.
E
Files and how to work with them
- Sharpen using a special file holder with a saw chain round
file. Normal round files are not appropriate for this work. See
"Accessories" for the order number.
- File the first cutter half with a 7/32" (5,5 mm) dia. round file,
then switch to a 3/16" (4,8 mm) dia. file.
- 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 nominal value for all other cutters of the chain.
- Replaced cutters must be exactly adopted to the shape of
the other cutters. This is also true for the depth gauges.
- Always guide the file horizontally (10
=
0,64 mm
(.025")
to the guide bar).
o
25