7.6.2.
A specialized centre will sharpen the chain using the right tools to ensure minimum removal
of material and even sharpness on all the cutting edges.
7.6.3.
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.
7.6.4.
Sharpen the chain as follows (Fig 17).
7.6.4.1.
Secure the bar firmly with the chain mounted in a suitable vice.
7.6.4.2.
Tighten the chain if it is loose.
7.6.4.3.
Mount the file in the guide and then insert it in the tooth at a constant angle from
the cutting edge.
7.6.4.4.
Sharpen in a forward motion a few times and repeat this on all the cutting edges
facing the same way (right or left).
7.6.4.5.
To move the chain forward, use the switch to release the brake, then use a
screwdriver to make the chain run.
7.6.4.6.
Turn the bar over in the vice and repeat on all the other cutting edges.
7.6.4.7.
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.
7.6.4.8.
After sharpening, remove all traces of filing and dust and lubricate the chain in an oil
bath.
7.6.5.
Replace the chain whenever;
7.6.5.1.
The length of the cutting edges reduces to 5 mm or less;
7.6.5.2.
There is too much play between the links and the rivets.
7.7.
Chain maintenance table.
7.8.
Bar maintenance.
7.8.1.
To avoid asymmetrical wear on the bar, make sure it is turned over periodically.
7.8.2.
To keep the bar in perfect working order, proceed as follows (Fig. 18);
7.8.2.1.
Grease the bearings on the nose sprocket (if pre sent) with the syringe.
7.8.2.2.
Clean the bar groove with the scraper.
7.8.2.3.
Clean the lubrication holes.
The characteristic data of the chain and bar homologated for this machine are
shown in the “EC Conformity Statement” that accompanies same machine. 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.
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