Stiga SP 375 Operator's Manual page 28

16
EN
Chain maintenance table
WARNING!
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
– 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 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.
BAR MAINTENANCE (Fig. 25)
To avoid asymmetrical wear on the bar, make sure
it is turned over periodically.
Do not use other types of chains or bars for safety reasons.
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
a a
mm
0.45
0.65
0.65
0.80
To keep the bar in perfect working order, proceed
as follows:
– grease the bearings on the nose sprocket (if
present) with the syringe;
– Clean the bar groove with the scraper (not in-
cluded);
– clean the lubrication holes;
– with a flat file, remove burr from the edges and
level off the guides.
Replace the bar whenever:
– the groove is not as deep as the height of the
drive links (which must never touch the bottom);
– the inside of the guide is worn enough to make
the chain lean to one side.
EXTRAORDINARY MAINTENANCE
All maintenance operations not foreseen in this
manual must be performed exclusively by your
dealer.
All and any operations performed in unauthorised
centres or by unqualified persons will totally invali-
date the warranty.
STORAGE
After every work stint, clean the machine thor-
oughly to remove all dust and debris, and repair
or replace any faulty parts.
The machine must be stored in a dry place away
from the elements and with the bar cover correctly
fitted.
File diameter (d)
d d
inches mm
5/32 4.0
3/16 4.8
13/64 5.2
7/32 5.6