Grouw 18000 Manual De Instrucciones página 78

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 signi� cantly.
Sharpen the teeth using a round � le with
a � ling attachment (A), a � at � le (B) and a
depth-gauge tool (C).
You can also use an electric chain grinder. Be
A
B
C
very careful when sharpening the teeth – use
gloves!
Replace the chain once the teeth are
worn down to the mark or if they become
narrower than 4 mm.
78
Sharpening the chain
1. Secure the chainsaw blade in a vice or
saw groove in a tree stump. The chainsaw
must be as � rmly secured as possible.
2. The chain teeth point alternately in the
opposite direction to each other. First
sharpen one set of teeth, then turn the
saw and sharpen the other set of teeth.
The teeth must be sharpened from the
side they point out towards.
Mark the � rst tooth with a felt-tip pen
or similar, so that you can see when you
have sharpened the teeth all the way
around on the chain.
3. Place the � le against a tooth, and push
the � le forward at an angle of 30° in
relation to the blade.
30°