Checking The Saw Chain; Sharpening The Chain - Grouw 78472 Manual De Instrucciones

If there is a risk that the tree will not fall in the
desired direction, or if it tips back and traps
the blade, stop sawing before the felling back
cut is complete and use suitable wedges to
open the cut and get the tree to fall along
the desired line of fall.
Once the tree begins to fall, remove the
chainsaw from the cut. Release the on/off
button so that the chainsaw stops rotating
and then use the planned path of retreat (C).
Be aware of falling branches above your head
and be careful not to lose your footing.

Checking the saw chain

A sharp saw chain creates large saw chips,
while a blunt chain creates sawdust. Once
the saw chain is blunt, the chainsaw 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).
A
B
C
Be very careful when sharpening the teeth
– use gloves!
Replace the saw chain when the teeth are
worn down to the mark.
56

Sharpening the chain

Unplug the chainsaw from the mains before
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.
Do not pull the � le back, but lift it up and
� le forward again.
File each tooth with the same number of
strokes of the � le.
30°