Sharpening The Chain - Stiga 3700 Manual De Instrucciones

14
EN
• Tuning minimum speed
WARNING!
when the engine is running idle. If the chain
moves when the engine is running idle, con-
tact your dealer to correctly regulate the en-
gine.

SHARPENING THE CHAIN

WARNING!
saw works safely and efficiently, it is essential
that the cutting components are well-sharp-
ened.
Sharpening is necessary when:
• The sawdust looks like dust.
• Cutting becomes more difficult.
• The cut is not straight.
• Vibrations increase.
• Fuel consumption increases.
WARNING!
ciently sharpened, the kick-back's risk in-
creases.
A specialized centre will sharpen the chain using
the right tools to ensure minimum removal of ma-
terial and even sharpness on all the cutting edges.
If you sharpen the chain yourself, use special
round-section files with the right diameter de-
pending on the type of chain (see "Chain Mainte-
Chain maintenance table
WARNING!
are shown in the "EC Conformity Statement" provided. Do not use other types of chains or bars
for safety reasons.
The table gives the sharpening data for different types of chains, but this does not mean you
can use different chains from the homologated one.
Chain pitch
inches
3/8 Mini
0.325
3/8
0.404
The chain must not move
To ensure that the chain-
If the chain is not suffi-
The specifications of the chain and the bar homologated for this machine
Limiter tooth level (a)
mm inches
9.32 0.018
8.25 0.026
9.32 0.026
10.26 0.031
MAINTENANCE AND STORAGE
nance Table"). You need a certain amount of skill
and experience to avoid damaging the cutting
edges.
Sharpen the chain as follows (Fig. 24):
– Switch off the engine, release the chain brake
and secure the bar with the chain in a vice so that
the chain can run smoothly.
– Tighten the chain if it is loose.
– Mount the file in the guide and then insert it in the
tooth at a constant angle from the cutting edge.
– Sharpen in a forward motion a few times and re-
peat this on all the cutting edges facing the same
way (right or left).
– Turn the bar over in the vice and repeat on all the
other cutting edges.
– Check that the limiter tooth does not stick out fur-
ther than the inspection instrument and file any
projecting parts with a flat file, rounding off the
edge.
– After sharpening, remove all traces of filing and
dust and lubricate the chain in an oil bath.
Replace the chain whenever:
– The length of the cutting edges reduces to 5
mm or less;
– There is too much play between the links and the
rivets.
mm
0.45
0.65
0.65
0.80
File diameter (d)
inches mm
5/32 4.0
3/16 4.8
13/64 5.2
7/32 5.6