Sharpening The Chain - GGP ITALY ME77 Manual De Instrucciones

14
EN
When performance is poor, first check that the
chain runs smoothly and the bar rails are not dis-
torted, then contact your dealer to check the
carburetion and the engine.
• 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
engine.

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
increases.
A specialized centre will sharpen the chain using
the right tools to ensure minimum removal of
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
material and even sharpness on all the cutting
edges.
If you sharpen the chain yourself, use special
round-section files with the right diameter
depending on the type of chain (see "Chain
Maintenance 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
repeat 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
further than the inspection instrument and file
any projecting parts with a flat file, rounding
off the edge.
– After sharpening, remove all traces of filing
a
mm
0.45
0.65
0.65
0.80
File diameter (d)
d
inches mm
5/32 4.0
3/16 4.8
13/64 5.2
7/32 5.6