76
Maintenance
Checking the chain
A sharp chain creates large saw chips, while
a blunt chain creates sawdust. Once the
chain is blunt, the saw must also be pressed
against the tree to engage, and there is a risk
the saw will kick back signifi cantly.
When the chain is no longer sharp, sharpen
the teeth using a round fi le with a fi ling
attachment (A), a fl at fi le (B) and a depth-
gauge tool (C).
You can also use an electric chain grinder. Be
very careful when sharpening the teeth – use
gloves
!
Re
p
lace the chain once the teeth are
worn down to the mark or i
f
they become
narrower than 4 mm
.
Sharpening the chain
1
.
Secure the chainsaw blade in a vice or
saw groove in a tree stum
p.
The chainsaw
must be as fi rmly secured as
p
ossible
.
2.
The chain teeth
p
oint alternately in the
o
pp
osite direction to each other
.
First
shar
p
en one set o
f
teeth
,
then turn the
saw and shar
p
en the other set o
f
teeth
.
The teeth must be shar
p
ened
f
rom the
side they
p
oint out towards
.
Mark the fi rst tooth with a
f
elt-ti
p
p
en
or similar
,
so that you can see when you
have shar
p
ened the teeth all the way
around on the chain
.
3
.
Place the fi le against a tooth
,
and
p
ush
the fi le
f
orward at an angle o
f
30
°
in
relation to the blade
.
A
B
C
30
°