Solo 694 - Maintenance; Sharpening the Saw Chain

40
- The sharpening angle of 25
o
(3/8") and 30
o
(.404") must
be equal for all cutters. Different angles result in a
roughly, irregularly running chain, increase wear and
tear and cause chain ruptures.
- The front rake of 60
o
(3/8") and 85
o
(.404") depends on
the cut depth of the round file. If the file to be used is
guided correctly, the correct front rake results
automatically.
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!
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.
Characteristics of a correctly sharpened chain
(type 3/8" and .404"):
-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 0.65 mm (.025") for 3/8" and 0.75 mm
(.030) for .404". 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
increases.
==
A
B
STOP
C
25° for 3/8" 30° for .404"
60° (3/8")
85° (.404")
D
E
3/8"
.404"
90°
3/8" =
0,65 mm
(.025")
.404 =
0,75 mm
(.030")
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.
- 3/8"+ .404": Use only 5,5 mm dia. roundfile.
- 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.
- 3/8" guide the file horizontally (90
o
to the guide bar).
- .404" guide the file upwards (10
o
to the guide bar).