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50
Maintenance (continued)
52
53
CHAIN BRAKE
Always wear safety glasses when performing
maintenance on your saw.
If the chain brake does not work properly, remove the
bar clamp (chain cover) to inspect. Clean brake
mechanism and related parts, removing woodchips,
dust, excessive oil and foreign material. Use a brush or
low volume compressed air. Inspect for excessive wear
(Fig. 50), damage to the band or actuator assembly.
Check closely for wear to the band or deformities using
the guidelines explained in Section 8 of this manual.
If you notice or suspect a problem with the chain brake
assembly, DO NOT use the chain saw until this is
repaired. After cleaning, test the chain brake to assure
that it works properly (explained in Section 8 of this
manual). if this chain brake does not function properly,
discontinue use until the chain brake is repaired.
Refer all chain brake service or repair to an authorized
servicing dealer.
GUIDE BAR
Turn the guide bar and check that the lubrication holes
are free from impurities (Fig. 51).
SPARK ARRESTOR
The chain saw is provided with a Spark Arrester System
(part number em-50070133) (Fig. 52) complying with the
requirements of SAE J335 standard.
For compliance with the standard, two spiked bumpers,
part number em-50070033 (C, Fig. 67) and part number
em-50070062 (B, Fig. 67) have to be mounted, as
provided on the chain saw in the box.
The Spark Arrester System needs periodic and accurate
maintenance and cleaning:
• Periodically check the spark arrester screen and
substitute it when holes, bends or deformations
appear
• Carefully check to see if dust, debris or organic
material is in contact with portions of the Spark
Arrester System. In particular, check the gap between
the muffler and the shield. Clean this often with tools or
shop air.
In this chainsaw the spark arrester screen is integral part
of the inner half of the muffler body; if the screen needs
to be replaced, please order the whole inner assembly,
part number em-50070085 (A, Fig. 52).