AL-KO BKS 2625 T, Translation Of The Original Instructions For Use

Page: 51 / 168

Maintenance and storage
469850_d 51
Sharpening the chain
ADVICE
The cutting elements must always be
well sharpened for reasons of safety and
efficiency.
Sharpening is required if:
The saw chips resemble sawdust.
Greater force is necessary for cutting.
The cut is not straight.
Vibration increases.
Fuel consumption increases.
WARNING!
If the saw chain is not adequately shar-
pened, the danger of kickback will be in-
creased.
If trained customer service personnel are asked
to sharpen the chain, they will be able to do this
with the appropriate tools for a minimum of mate-
rial removal and uniform sharpening of all teeth.
Sharpening the chain yourself is possible using
special round files with a diameter selected for the
individual type of chain (see "Chain maintenance
table") and if you have the necessary skill and ex-
perience to avoid damaging the teeth.
To sharpen the chain (Fig. 24):
1. Switch off the engine, release the chain brake
and clamp the bar firmly in a suitable vice with
the chain mounted, making sure that the chain
can move freely.
2. Tighten the chain if it is loose.
3. Place the file in the corresponding guide and
then guide the file through the opening of
the tooth making sure that you keep an even
angle according to the tooth profile.
4. Only perform a few strokes of the file and ex-
clusively in the forwards direction, then repeat
the working step on all teeth in the same ori-
entation (right or left).
5. Reverse the position of the bar in the vice
and repeat the working step on the remaining
teeth.
6. Check that the limit tooth does not project bey-
ond the checking tool, and file off any projec-
tion using a flat file, then round down the pro-
file.
7. After sharpening, clean away all filings and
dust, then lubricate the chain in an oil bath.
The chain must be renewed if:
The length of the teeth is less than 5 mm;
The play on the links at the chain rivets is ex-
cessive.
Chain maintenance table
ADVICE
The technical data of the chain and the
bar authorised for use with this machine
are stated in the "EC declaration of con-
formity" supplied with the machine.
WARNING!
For reasons of safety, no other types of
chain or bar are allowed to be used.
The table shows the sharpness for various chain
types, but should not be interpreted as authorisa-
tion for using chains other than those which are
approved.
File diameter Top plate angle Down angle
Head tilt
angle (55°)
Depth gauge
setting
Chain type
Rotatio-
nal angle
of the tool
Inclina-
tion angle
of the tool
Side plate
angle