Occasional Maintenance; Chain Drive Sprocket; Maintenance Of The Toothed Chain; Guide Bar Maintenance - ST MP 500 Li 48 Manual De Instrucciones

8. OCCASIONAL MAINTENANCE

8.1 CHAIN DRIVE SPROCKET

Regularly check the condition of the sprocket
with your local dealer and replace it when
wear exceeds the accepted limits.
Do not mount a new chain with
a worn sprocket or vice-versa.
8.2 MAINTENANCE OF THE
TOOTHED CHAIN
To ensure that the chainsaw works
safely and efficiently, it is essential that
the cutting means are well-sharpened.
Chain sharpening is necessary when:
• The sawdust looks like dust.
• Cutting becomes more difficult.
• The cut is not straight.
• Vibrations increase.
Kickback may occur if the chain
is not sufficiently sharpened
IMPORTANT It is recommended to have an
Authorised centre sharpen the chain using the
right tools to ensure minimum removal of material
and even sharpness on all the cutting edges.
8.2.1 Replacing the toothed chain
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.
• the cutting speed is too slow and the
repeated sharpening does not improve
the cutting speed. The chain is worn.
IMPORTANT After replacing the chain,
its tension level must be checked more
frequently due to settling of the chain.

8.3 GUIDE BAR MAINTENANCE

NOTE Any work on the guide bar requires
specific experience and special tools in order
to achieve top workmanship standards; for
safety purposes, we recommend you contact
your dealer to ensure work is done correctly.
To avoid asymmetrical wear on the bar,
make sure it is turned over periodically.
To keep the bar in perfect working
order, proceed as follows:
1. grease the bearings on the nose sprocket
(if present) with the syringe (not included).
2. clean the bar groove with the scraper
(not included) (Fig. 27.A);
3. clean the lubrication holes (Fig. 27.B);
4. with a flat file, remove burr from the
edges and level off the guides.
8.3.1 Replacing the bar
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.

9. STORING

IMPORTANT The safety regulations to
follow for putting into storage are described
in paragraph 2.4. Strictly comply with these
instructions to avoid serious risks or dangers.

9.1 STORING THE MACHINE

When the machine is to be stored away:
1. Remove the battery from its
housing and recharge it;
2. Mount the bar cover.
3. Wait until the motor is sufficiently cold;
4. Clean (par. 7.4).
5. Check there are no loose or damaged
components. If necessary, replace the
damaged components and tighten
any screws and loose bolts or contact
the authorised service centre.
6. Store the machine:
– in a dry place
– protected from inclement weather
– in a place where children cannot get to it
– making sure that keys or tools used
for maintenance are removed.

9.2 STORING THE BATTERY

The battery must be kept in a cool,
shaded place without humidity.
NOTE If unused for any length of
time, recharge the battery every two
months to prolong its working life.

10. HANDLING AND TRANSPORTATION

Whenever the machine is to be handled,
raised, transported or tilted you must:
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