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MAINTENANCE
• Remove the protection (C).
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• Remove the spark arrester screen screw (D).
• Remove the spark arrester screen (A) p.n. 50170278.
• Clean and inspect the spark arrester screen. If the spark arrester
screen is damaged, faulty or deteriorated, replace the screen.
• Reassemble components in reversed order of removal and
torque the muffler screws to 70 in/lbs (7.9 Nm).
The Spark Arrester System needs a periodic and accurate
maintenance and cleaning, in particular:
- check periodically the spark arrester screen and substitute it
when holes, bends or deformations appear;
- check carefully if dust, debris or organic material is in contact
with parts of the Spark Arrester System; check especially the
gap between the muffler and the shield; clean it often with
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tools or shop air.
For compliance with the standard, one spiked bumper p.n.
50170270 (A, Fig. 94) have to be mounted, as provided on the
chainsaw.
Muffler
WARNING – This muffler incorporates a catalytic
converter, needed in order to ensure the engine
complies with current emissions standards. Never
attempt to modify or remove the catalytic converter:
in doing so, you will be breaking the law.
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WARNING – Mufflers with catalytic converters become
very hot during operation, and retain heat for a long
time after the engine has been stopped. This is the
case even with the engine idling. Contact can burn
the skin. Always remember the potential fire risk!
CAUTION – If the catalytic converter is damaged, it
must be replaced. If the catalytic converter frequently
becomes blocked, this could be an indication that
the efficiency of the muffler is limited.
WARNING: Do not operate your chainsaw if the
muffler is damaged, missing or modified. An
improperly maintained muffler will increase the risk
of fire and hearing loss.
Chain Brake
If the chain brake does not work properly, remove the clutch
cover and clean the chain brake components. Check for wear on
the brake band (A, Fig. 95) and replace if worn or deformed.
WARNING: If the brake band is worn too thin it may
break when the chain brake is triggered. With a broken
brake band, the chain brake will not stop the chain.
The chain brake should be replaced by an authorized
service dealer if any part is worn to less than 0.02" (0.6
mm) thick. Repairs on a chain brake should be made
by an authorized service dealer. Take your unit to the
place of purchase if purchased from a servicing dealer,
or to the nearest authorized service dealer.
Always keep the chain brake mechanism clean and lightly
lubricate the linkage (B, Fig. 96).
Always test the chain brake performance after servicing or
cleaning per the Operation - Chain Brake Section.
WARNING: Check and, if damaged, replace the
chain catcher / safety stop (C, Fig. 95).
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